2017–18 Australian region cyclone season#Tropical Cyclone Joyce

During October, ahead of the tropical cyclone season, the Bureau of Meteorology issued a tropical cyclone outlook for the coming 2017–18 season, which would officially run from 1 November 2017 to 30 April 2018. Seasonal forecasts were issued for the basin as a whole, as well as the Eastern, Northern and Western regions and the North-Western sub-region. The forecasts took into account various factors, including the latest neutral to weak La Niña conditions that had been observed in the tropical Pacific Ocean. The outlooks showed that activity in the basin overall, as well as for each of its individual regions, would be near average. For the Western region between 90°E and 125°E, the BOM forecast that the area would also see activity slightly above its average of 7, with a 52% chance of an above average number of tropical cyclones occurring. TCWC Perth also noted that there was a likelihood of two tropical cyclones and a significant likelihood of at least one severe tropical cyclone impacting Western Australia.{{cite web|publisher=Australian Bureau of Meteorology|date=9 October 2017|title=Western Australia Seasonal Tropical Cyclone Outlook 2016–17|url=http://www.bom.gov.au/cyclone/outlooks/seasonal/wa.shtml |url-status=live|access-date=9 October 2017|author=Perth Tropical Cyclone Warning Centre|archive-url=https://web.archive.org/web/20171114154215/http://www.bom.gov.au/cyclone/outlooks/seasonal/wa.shtml|archive-date=14 November 2017}} For the North-Western sub-region between 105°E and 130°E, it was predicted that activity would be above average, with a 56% chance of above-average tropical cyclone activity. The Northern Territory, which was defined as being between as being 125°E and 142.5°E, had a 53% chance of an above-average season. The Eastern region between 142.5°E and 160°E was predicted to have a slightly above-normal tropical cyclone season, with a 54% chance of above-average tropical cyclone activity.

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 8 August

| Dissipated = 8 August

| Image =

| Track =

| 10-min winds = 17

| 1-min winds =

| Pressure = 1005

| Type1 = low

}}

On 8 August, TCWC Perth started to monitor a tropical low located approximately {{convert|850|km|mi|abbr=on}} to the west-northwest of the Cocos Islands, on the 90th meridian east—the western edge of the BOM's area of responsibility.{{Cite web|url=http://www.bom.gov.au/wa/forecasts/nwcyclone.shtml|archive-url=https://web.archive.org/web/20170810011527/http://www.bom.gov.au/wa/forecasts/nwcyclone.shtml|url-status=dead|archive-date=2017-08-10|title=Tropical Cyclone Outlook for the Western Region|website=www.webcitation.org|access-date=2017-08-08}}{{Cite web|url=http://www.bom.gov.au/cyclone/about/warnings/index.shtml#InAC|title=Tropical Cyclones|last=Meteorology|first=corporateName=Bureau of|website=www.bom.gov.au|access-date=2017-08-08}} The tropical low moved in a west-southwesterly direction and attained {{convert|35|km/h|mph|abbr=on|round=5}} sustained winds south of the circulation center,{{Cite web|url=http://www.meteo.fr/temps/domtom/La_Reunion/webcmrs9.0/francais/activiteope/bulletins/zcit/ZCITF_201708081047.pdf|title=Meteo-France Tropical Bulletin (8 August 2017)}} and a minimum barometric pressure of 1005 hPa (29.68 inHg).{{Cite web|url=http://www.bom.gov.au/australia/charts/glw_12z.shtml|archive-url=https://web.archive.org/web/20170804233947/http://www.bom.gov.au/australia/charts/glw_12z.shtml|url-status=dead|archive-date=2017-08-04|title=Gradient Level Wind Analysis Valid 12 UTC|website=www.webcitation.org|access-date=2017-08-08}} The storm moved out of the Australian region on the same day.

{{clear}}

{{main|Cyclone Cempaka}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 21 November

| Dissipated = 29 November

| Image = Cempaka 2017-11-27 0300Z.jpg

| Track = Cempaka 2017 track.png

| 10-min winds = 60

| 1-min winds =

| Pressure = 990

}}

On 22 November, TCWC Perth and TCWC Jakarta started to monitor a weak tropical low that had developed about {{convert|332|km|mi|abbr=on}} south of the city of Surabaya.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Saturday 25 November 2017|url=http://gwydir.demon.co.uk/advisories/IDW10800_201711220602.htm|archive-url=https://archive.today/20240521215631/https://www.webcitation.org/6vCJkFtkl?url=http://gwydir.demon.co.uk/advisories/IDW10800_201711220602.htm|url-status=dead|date=22 November 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} By 06:00 UTC of 26 November, TCWC Jakarta began issuing advisories and was classified as a tropical depression.{{cite web|title=BULETIN INFORMASI SIKLON TROPIS Depresi Tropis 95S|url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711260549.htm|archive-url=https://archive.today/20240521215753/https://www.webcitation.org/6vH1HvHDd?url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711260549.htm|url-status=dead|date=26 November 2017|archive-date=21 May 2024|publisher=Badan Meteorologi Klimatologi Dan Geofisika}} The JTWC, however, issued a Tropical Cyclone Formation Alert early on 27 November, stating that satellite imagery depicted flaring convection near its center.{{Cite web |url=http://gwydir.demon.co.uk/advisories/WTXS21-PGTW_201711270200.htm |title=Archived copy |access-date=27 November 2017 |archive-url=https://archive.today/20240521215913/https://www.webcitation.org/6vILNfd38?url=http://gwydir.demon.co.uk/advisories/WTXS21-PGTW_201711270200.htm |archive-date=21 May 2024 |url-status=dead |df=dmy-all }} Several hours later, TCWC Jakarta upgraded the system to a tropical cyclone, giving the name Cempaka.{{cite web|title=BULETIN INFORMASI SIKLON TROPIS SIKLON TROPIS CEMPAKA|url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711271213.htm|archive-url=https://archive.today/20240521215834/https://www.webcitation.org/6vILkkO4N?url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711271213.htm|url-status=dead|date=27 November 2017|archive-date=21 May 2024|publisher=Badan Meteorologi Klimatologi Dan Geofisika}} Winds from the cyclone also blew ash from nearby Mount Agung on Bali westwards to its popular beaches and far eastern Java.{{cite web|title=Bali volcano WARNING: Cyclone blowing HAZARDOUS ash across Indonesia|url=https://www.express.co.uk/news/world/885590/Bali-volcano-eruption-Mount-Agung-live-update-Indonesia-cyclone-Cempa-flight-status|date=29 November 2017}} On 30 November, Cempaka weakened into a tropical low, while turning to the southwest.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Sunday 3 December 2017|url=http://gwydir.demon.co.uk/advisories/IDW10800_201711300604.htm|archive-url=https://archive.today/20240521220158/https://www.webcitation.org/6vMlolZwA?url=http://gwydir.demon.co.uk/advisories/IDW10800_201711300604.htm|url-status=dead|date=30 November 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} TCWC Perth last mentioned Cempaka on 1 December.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Monday 4 December 2017|url=http://gwydir.demon.co.uk/advisories/IDW10800_201712010601.htm|archive-url=https://archive.today/20240521220437/https://www.webcitation.org/6vOH7wvl4?url=http://gwydir.demon.co.uk/advisories/IDW10800_201712010601.htm|url-status=dead|date=1 December 2017|archive-date=21 May 2024}}

Although Cempaka never made landfall, the rainfall from the storm caused severe flooding and landslides across the southern half of Java and Bali, killing at least 41 people and destroying many homes and businesses.{{Cite web|url=http://www.theborneopost.com/2017/12/07/indonesia-cyclone-death-toll-reaches-41/|title=Indonesia cyclone death toll reaches 41|date=7 December 2017|publisher=The Borneo Post/AFP|access-date=7 December 2017}}

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{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 26 November

| Dissipated = 29 November

| Image =

| Track =

| 10-min winds =

| 1-min winds =

| Pressure = 1005

| Type1 = low

}}

On 24 November, TCWC Darwin started to monitor a weak tropical low that had developed in the Banda Sea.{{cite web|title=Updated Tropical Cyclone Outlook for the Northern Region, including the Gulf of Carpentaria for the period until midnight CST Monday 27 November 2017|url=http://gwydir.demon.co.uk/advisories/IDD10610_201711240545.htm|archive-url=https://archive.today/20240521215713/https://www.webcitation.org/6vDygksFF?url=http://gwydir.demon.co.uk/advisories/IDD10610_201711240545.htm|url-status=dead|date=24 November 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The system moved in a slow direction, and attained a minimum pressure of 1005 hPa, until it was last mentioned on 29 November.{{cite web|title=Updated Tropical Cyclone Outlook for the Northern Region, including the Gulf of Carpentaria for the period until midnight CST Saturday 2 December 2017|url=http://gwydir.demon.co.uk/advisories/IDD10610_201711290445.htm|archive-url=https://archive.today/20240521220116/https://www.webcitation.org/6vLUszee0?url=http://gwydir.demon.co.uk/advisories/IDD10610_201711290445.htm|url-status=dead|date=29 November 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 26 November

| Dissipated = 4 December

| Image = Dahlia 2017-11-30 0330Z.jpg

| Track = Dahlia 2017 track.png

| 10-min winds = 50

| 1-min winds = 55

| Pressure = 987

}}

Tropical Low 03U was first noted as a tropical depression by TCWC Jakarta on 24 November, while it was located about {{convert|1500|km|mi|round=5|abbr=on}} to the west of Jakarta, Indonesia.{{Cite web |url=http://www.wis-jma.go.jp/d/o/WIIX/Alphanumeric/Warning/Tropical_cyclone/20171125/121100/A_WTID01WIIX251211_C_RJTD_20171125121046_53.txt |title=Archived copy |access-date=29 November 2017 |archive-url=https://archive.today/20240521215955/https://www.webcitation.org/6vK8rd8wP?url=http://www.wis-jma.go.jp/d/o/WIIX/Alphanumeric/Warning/Tropical_cyclone/20171125/121100/A_WTID01WIIX251211_C_RJTD_20171125121046_53.txt |archive-date=21 May 2024 |url-status=live |df=dmy-all }} By 29 November, TCWC Jakarta upgraded the system to a tropical cyclone, receiving the name Dahlia, making it the first time where at least two cyclones were formed and named by TCWC Jakarta in a single season.{{cite web|title=Siklon Tropis DAHLIA|url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711291214.htm|archive-url=https://archive.today/20240521220033/https://www.webcitation.org/6vLUN0D9p?url=http://gwydir.demon.co.uk/advisories/IDJ21030_201711291214.htm|url-status=dead|date=29 November 2017|archive-date=21 May 2024|publisher=Badan Meteorologi Klimatologi Dan Geofisika}} The JTWC followed suit the next day, designating the system as 01S.{{cite web|title=Tropical Cyclone 01S (Dahlia) Warning Nr 001|url=http://gwydir.demon.co.uk/advisories/WTXS31-PGTW_201711300300.htm|archive-url=https://archive.today/20240521220235/https://www.webcitation.org/6vMmym71G?url=http://gwydir.demon.co.uk/advisories/WTXS31-PGTW_201711300300.htm|url-status=dead|date=30 November 2017|archive-date=21 May 2024|publisher=Joint Typhoon Warning Center}} Best track reanalysis by the Bureau of Meteorology concluded that Dahlia reached tropical cyclone intensity as a Category 2, with sustained winds of 50 knots on 1 December and a minimum barometric pressure of 985 hPa.{{cite web|title=Tropical Cyclone Dahlia|url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712011316.htm|archive-url=https://archive.today/20240521220318/https://www.webcitation.org/6vOFn8xPa?url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712011316.htm|url-status=dead|date=1 December 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} Dahlia maintained its intensity for several hours until the storm moved southeastwards and began to rapidly weaken on 2 December as it interacted with Ex-Tropical Cyclone Cempaka.{{cite web|title=Tropical Cyclone Dahlia|url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712020655.htm|archive-url=https://archive.today/20240521220517/https://www.webcitation.org/6vPZ8pzsa?url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712020655.htm|url-status=dead|date=2 December 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} Dahlia briefly reintensified for a period on 3 December.{{cite web|title=Tropical Cyclone Dahlia|url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712010716.htm|archive-url=https://archive.today/20240521220356/https://www.webcitation.org/6vOFT903N?url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712010716.htm|url-status=dead|date=1 December 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The BoM later issued its final bulletin on Dahlia early on 4 December.{{cite web |title=Ex-Tropical Cyclone Dahlia |url= http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712040114.htm |archive-url=https://archive.today/20240521220638/https://www.webcitation.org/6vSKBWRRL?url=http://gwydir.demon.co.uk/advisories/AXAU02-APRF_201712040114.htm |archive-date=2024-05-21 |url-status=dead |date=4 December 2017|publisher=Australian Bureau of Meteorology}} TCWC Perth last monitored on Dahlia on 5 December.{{cite web|url=http://gwydir.demon.co.uk/advisories/IDW10800_201712050608.htm|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Friday 8 December 2017|date=5 December 2017|publisher=Australian Bureau of Meteorology|archive-url=https://archive.today/20240521220722/https://www.webcitation.org/6vUMDppFZ?url=http://gwydir.demon.co.uk/advisories/IDW10800_201712050608.htm|archive-date=21 May 2024|url-status=dead}}

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{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 26 December

| Dissipated = 29 December

| Image = Hilda 2017-12-28 0215Z.jpg

| Track = Hilda 2017 track.png

| 10-min winds = 55

| 1-min winds = 50

| Pressure = 980

}}

During 26 December, the BoM reported that a tropical low had developed just off the Kimberley coast, about {{convert|330|km|mi|round=5|abbr=on}} to the north of Derby.{{cite report|title=Tropical Cyclone Hilda|url=http://www.bom.gov.au/announcements/sevwx/wa/watc20171226.shtml|access-date=17 January 2018|archive-url=https://web.archive.org/web/20181210155655/http://www.bom.gov.au/announcements/sevwx/wa/watc20171226.shtml|archive-date=10 December 2018|date=January 2018|publisher=Australian Bureau of Meteorology|url-status=live|df=dmy-all}} The system subsequently moved south-southwest parallel to the coast, as it developed further before it moved overland to the southwest of Cape Leveque. The system was subsequently classified as a Category 1 tropical cyclone on 27 December and named Hilda by the BoM, while it was located inland near Broome based on reports of persistent gale-force winds from Broome Airport. Soon back over water, the system strengthened more, and was classified as a Category 2 tropical cyclone with 10-minute peak windspeeds of {{convert|95|km/h|mph|round=5|abbr=on}}. Late that same day, Hilda made a second and final landfall just north of Bidyadanga at near peak intensity. Inland, the cyclone moved south-southeastward, weakening into a tropical low by the afternoon of 28 December, and then dissipating the following day. Overall, Hilda caused only minor damage as it moved through western Kimberley.

{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 3 January

| Dissipated = 6 January (Exited basin)

| Image = 08U 2018-01-05 0735Z.jpg

| Track = Irving 2018 track.png

| 10-min winds = 40

| 1-min winds = 50

| Pressure = 993

}}

On 3 January, a tropical low had developed to the southwest of Sumatra.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Saturday 6 January 2018|url=http://gwydir.demon.co.uk/advisories/IDW10800_201801030600.htm|archive-url=https://archive.today/20240521220922/https://www.webcitation.org/6wC4tFKSP?url=http://gwydir.demon.co.uk/advisories/IDW10800_201801030600.htm|url-status=dead|date=3 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} On 06:00 UTC of 5 January, TCWC Perth began issuing advisories on the system, using the identifier 08U.{{cite web|title=Tropical Low 08U|url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801050724.htm|archive-url=https://archive.today/20240521221003/https://www.webcitation.org/6wF0Ea6xf?url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801050724.htm|url-status=dead|date=5 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} TCWC Perth had recorded winds of {{convert|75|km/h|mph|abbr=on|round=5}}, despite the fact that the system did not have the structure of a tropical cyclone. By the next day, 08U then strengthened into a Category 1 tropical cyclone, with the storm receiving the name Irving, the fourth named storm of the season.{{cite web|title=Tropical Cyclone Irving|url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801060057.htm|archive-url=https://archive.today/20240521221122/https://www.webcitation.org/6wGVEN4CI?url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801060057.htm|url-status=dead|date=6 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} Three hours later, the JTWC followed suit and gave the system the designation 04S.{{cite web|title=Tropical Cyclone 04S (Irving) Warning Nr 001|url=http://gwydir.demon.co.uk/advisories/WTXS32-PGTW_201801060300.htm|archive-url=https://archive.today/20240521221202/https://www.webcitation.org/6wGWA7vZ6?url=http://gwydir.demon.co.uk/advisories/WTXS32-PGTW_201801060300.htm|url-status=dead|date=6 January 2018|archive-date=21 May 2024|publisher=Joint Typhoon Warning Center}} TCWC Perth, however, discontinued advisories after Irving exited the basin on 12:00 UTC the same day.{{cite web|title=Tropical Cyclone Irving|url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801060700.htm|archive-url=https://archive.today/20240521221041/https://www.webcitation.org/6wGVCWaNc?url=http://gwydir.demon.co.uk/advisories/AXAU01-APRF_201801060700.htm|url-status=dead|date=6 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

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{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 7 January

| Dissipated = 13 January

| Image = Joyce 2018-01-12 0536Z.jpg

| Track = Joyce 2018 path.png

| 10-min winds = 50

| 1-min winds = 50

| Pressure = 975

}}

{{see also|2018 Broome flood}}

{{expand section|date=April 2018}}

A tropical low developed over the Joseph Bonaparte Gulf on 7 January 2018, and moved over the Kimberley region of Western Australia the next day. On 10 January, the low moved offshore and began to develop, and the system was upgraded to a tropical cyclone, named Joyce, on 11 January. The system made landfall on the Western Australian coast the following day.{{cite web|url = http://www.bom.gov.au/cyclone/history/joyce.shtml|title = Tropical Cyclone Joyce - BOM}} The remnants of Cyclone Joyce bought heavy rain to the Perth Metro Area on 15 January; a total of {{convert|96|mm|in|abbr=on}} of rain in 24 hours fell in Perth, while Rottnest Island recorded the highest amount of rain in the metro, which was a total of {{convert|142|mm|in|abbr=on}}.{{cite news| url = http://www.abc.net.au/news/2018-01-16/perth-saturated-as-ex-cyclone-joyce-brings-four-months-of-rain/9332556| title = Perth saturated as ex-Cyclone Joyce brings four months of rain in a day - ABC News| website = Australian Broadcasting Corporation| date = 16 January 2018}}

{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 20 January

| Dissipated = 1 February

| Image = 11U 2018-01-24 0445Z.jpg

| Track = 11U 2018 track.png

| 10-min winds = 40

| 1-min winds =

| Pressure = 985

| Type = low

}}

{{see also|2018 Broome flood}}

{{expand section|date=December 2022}}

The slow-moving system brought copious rains to a broad swath of coastal Australia. In Kimberley, Western Australia, near-record rainfall accumulations of {{convert|639|mm|in|abbr=on}} in four days caused extensive flooding. In a 24-hour span, {{convert|439|mm|in|abbr=on}} of rain fell across Broome, Western Australia, with flood waters in some areas reaching depths of {{convert|4|to|5|ft|m|abbr=on|order=flip}}. Portions of the Great Northern Highway and Cape Leveque road were closed. Coastal areas experienced powerful winds reaching {{convert|100|km/h|mph|abbr=on|round=5}} with gusts to {{convert|125|km/h|mph|abbr=on}}; these winds downed many trees and power lines.{{citation needed|date=April 2018}} The effects of the low were considered substantially worse than Hilda and Joyce, tropical cyclones that affected the same region earlier in the season.{{cite news|author1=Emily Jane Smith|author2=Vanessa Mills|author3=Cecile O'Connor|author4=Oliver Gordon|work=ABC News|date=30 January 2018|access-date=1 February 2018|title='Worse than a cyclone': Tropical low devastates WA's north|url=http://www.abc.net.au/news/2018-01-30/tropical-low-devastates-west-kimberley/9374620}}

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{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 11 February

| Dissipated = 21 February

| Image = Kelvin 2018-02-18 0448Z.jpg

| Track = Kelvin 2018 track.png

| 10-min winds = 80

| 1-min winds = 75

| Pressure = 955

}}

{{main|Cyclone Kelvin}}

{{expand section|date=April 2018}}

Tropical Cyclone Kelvin formed on 12 February and rapidly intensified into a Category 2 Storm (Australian Scale) and a Category 1 Storm (Saffir–Simpson) Kelvin made landfall, but unusually formed an eye over land. Kelvin sustained cyclone or hurricane intensity until dissipating on 20 February. Tropical Cyclone Kelvin brought widespread heavy rainfall to the Kimberley region which had already been saturated by other tropical cyclone systems. As a result, significant flooding occurred in parts of the Kimberley, including in the towns of Broome and Bidyadanga. Property damage was sustained at Broome and Anna Plains Station, where the cyclone made landfall, as well as infrastructural damage to the Great Northern Highway as a result of the heavy rainfall and flooding.{{citation needed|date=April 2018}}

{{clear}}

{{Use dmy dates|date=March 2018}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 11 March

| Dissipated = 16 March

| Image = Linda 2018-03-13 0310Z.jpg

| Track = Linda 2018 track.png

| 10-min winds = 50

| 1-min winds = 55

| Pressure = 987

}}

On 11 March, satellite imagery showed that atmospheric convection was persisting around a low-level circulation centre, that had developed on 160°E to the southwest of the Solomon Islands.{{cite report|author1=Grant, David |author2=Courtney, Joseph B |title=Tropical Cyclone Linsa |date=17 August 2022 |publisher=BoM |url=http://www.bom.gov.au/cyclone/history/pdf/Linda2018_report.pdf |access-date=4 December 2022 |archive-url=https://web.archive.org/web/20221129122540/http://www.bom.gov.au/cyclone/history/pdf/Linda2018_report.pdf |archive-date=29 November 2022}} The system was subsequently classified as Tropical Low 21U by the BoM and Tropical Disturbance 10F by the FMS later that day.{{BoM TC Database}}{{Cite report|title=Tropical Disturbance Summuary 11 March 2018 21z|publisher=Fiji Meteorological Service|date=11 March 2018}} Over the next couple of days, the system gradually developed further as it moved southwards into the Coral Sea, through an area of warm sea surface temperatures of about {{convert|29|-|30|C|F|abbr=on}} and low to moderate vertical wind shear.

On 11 March, the Fiji Meteorological Service reported that Tropical Disturbance 10F had developed about {{convert|85|km|mi|round=5|abbr=on}} to the southwest of Rennell and Bellona Province of the Solomon Islands.{{Cite web |url=https://www.wis-jma.go.jp/d/o/NFFN/Alphanumeric/Warning/Warnings_and_weather_summary/20180311/210000/A_WWPS21NFFN112100_C_RJTD_20180311231517_43.txt |title=Archived copy |access-date=18 March 2018 |archive-url=https://archive.today/20240521221727/https://www.webcitation.org/6y10Qj7sy?url=https://www.wis-jma.go.jp/d/o/NFFN/Alphanumeric/Warning/Warnings_and_weather_summary/20180311/210000/A_WWPS21NFFN112100_C_RJTD_20180311231517_43.txt |archive-date=21 May 2024 |url-status=live |df=dmy-all }} The system was poorly organised, with atmospheric convection displaced to the east of the low-level circulation centre. On the morning of 12 March, following some mild strengthening, the JTWC upgraded the disturbance to a tropical depression,{{Cite web|url=http://ftp.emc.ncep.noaa.gov/wd20vxt/hwrf-init/decks/bsh132018.dat|title=Tropical Cyclone Linda Track File|website=National Oceanic and Atmospheric Administration}} and the Bureau of Meteorology assigned the system the tropical low designation 21U.{{Cite web |url=http://gwydir.demon.co.uk/advisories/IDQ10810_201803120430.htm |title=Archived copy |access-date=12 March 2018 |archive-url=https://archive.today/20240521221643/https://www.webcitation.org/6xrZRxVkj?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201803120430.htm |archive-date=21 May 2024 |url-status=dead |df=dmy-all }} Late the same day, the JTWC assessed the system to be producing gale-force winds, and upgraded it to tropical storm status on the Saffir–Simpson scale. The storm moved generally southwards and entered the Australian region at 10:00 AEST on 13 March.{{Cite web|url=http://www.bom.gov.au/announcements/sevwx/qld/qldtc20180313.shtml|title=Tropical Cyclone Linda|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20181112195436/http://www.bom.gov.au/announcements/sevwx/qld/qldtc20180313.shtml|archive-date=2018-11-12|url-status=dead|access-date=24 March 2018}} Despite being exposed to generally unfavourable atmospheric conditions for tropical cyclone development, the tropical low strengthened into a category 1 tropical cyclone on the Australian scale six hours later. The storm was named "Linda", and was the first tropical cyclone in the Eastern Region for the 2017–18 season. Tropical Cyclone Linda attained its peak intensity at 22:00 AEST 13 March, with {{convert|75|km/h|mph|abbr=on|round=5}} 10-minute sustained winds, {{convert|95|km/h|mph|abbr=on|round=5}} one-minute sustained winds, and a minimum atmospheric pressure of {{convert|993|hPa|inHg|abbr=on|sigfig=4}}.

A few hours later, the storm assumed a more southwesterly course towards the southern Queensland coast. As a result of the further deteriorating atmospheric conditions and cooling sea surface temperatures due to movement away from warm equatorial waters, Linda weakened to a subtropical low during mid-morning on 14 March, having spent fewer than 24 hours as a cyclone. The JTWC proceeded to downgrade the system below tropical storm intensity at 04:00 AEST on 25 March. The remnant low transitioned to a south-southeasterly track and continued to decay while travelling roughly parallel to the coastline, finally dissipating on 16 March.

Ex-Tropical Cyclone Linda passed within about {{convert|300|km|mi|abbr=on}} of Fraser Island at its closest approach to Australia, and produced large waves and swell which were experienced on exposed southern Queensland beaches. Due to the dangerous surf conditions, many beaches south of Fraser Island were closed on 14 and 15 March for the safety of the public. Areas off parts of the Sunshine Coast experienced waves of up to {{convert|8|m|ft|abbr=off}}, and {{convert|1|m|ft|abbr=off}} of beach erosion occurred at the Gold Coast.{{Cite web|url=https://www.brisbanetimes.com.au/national/queensland/ex-tropical-cyclone-linda-to-move-away-from-coast-after-eight-metre-waves-erode-beaches-20180315-p4z4lh.html|title=Ex-tropical cyclone Linda to move away from coast after eight-metre waves erode beaches|last=Crockford|first=Toby|date=2018-03-15|website=Brisbane Times|access-date=2018-03-24}} Sustained gale-force winds were recorded on the Australian mainland at Double Island Point on 14 March, with gusts up to {{convert|85|km/h|mph|abbr=on|round=5}}.{{Cite web|url=http://www.bom.gov.au/climate/dwo/IDCJDW4041.latest.shtml|title=Double Island Point Weather Observations|date=14 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180324172059/http://www.bom.gov.au/climate/dwo/IDCJDW4041.latest.shtml|archive-date=24 March 2018|url-status=live|access-date=24 March 2018|df=dmy-all}}

{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 14 March

| Dissipated = 24 March

| Image = Marcus_2018-03-21_1812Z.jpg

| Track = Marcus 2018 track.png

| 10-min winds = 135

| 1-min winds = 150

| Pressure = 905

}}

{{main|Cyclone Marcus}}

{{expand section|date=April 2018}}

On 14 March, the Australian Bureau of Meteorology issued cyclone warnings for Darwin, the Tiwi Islands and parts of the northwest Top End.{{citation needed|date=April 2018}}

Marcus formed north of the Tiwi Islands as a Category 1 tropical cyclone on the Australian scale, and was upgraded to Category 2 in the hours before it hit the Northern Territory coastline on 17 March. Major events and flights in and out of Darwin were cancelled. Upon moving away from the coast, Marcus intensified markedly, and on 21 March, Cyclone Marcus reached Category 5 status on both cyclone scales. From then on, Marcus began a weakening phase, brushing by Western Australia and becoming a remnant low on 24 March.{{citation needed|date=April 2018}}{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 19 March

| Dissipated = 26 March

| Image = Nora 2018-03-24 0000Z (Himawari).jpg

| Track = Nora 2018 track.png

| 10-min winds = 85

| 1-min winds = 100

| Pressure = 958

}}

{{main|Cyclone Nora}}

On the afternoon of 19 March, the Bureau of Meteorology reported on the development of a weak tropical low in the Torres Strait, north of Thursday Island.{{Cite web|url=http://www.bom.gov.au/nt/forecasts/tcoutlook.shtml|title=Northern Territory Tropical Cyclone Outlook|date=19 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180301034949/http://www.bom.gov.au/nt/forecasts/tcoutlook.shtml|archive-date=1 March 2018|url-status=live|df=dmy-all}} Two days later, on the afternoon of 21 March, tropical cyclone advice bulletins were initiated as the tropical low began to develop, and a cyclone watch was issued for the far northeastern coastal region of the Top End.{{Cite web|url=http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDD20150.html|title=Tropical Cyclone Advice Number 2 (Nora)|date=21 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180213003346/http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDD20150.html|archive-date=13 February 2018|url-status=live|df=dmy-all}} At this stage, the system was forecast to coalesce into a tropical cyclone by 4:00 a.m. on 23 March (ACST), and then reach severe tropical cyclone strength by 4:00 p.m. the next day.{{Cite web|url=http://www.bom.gov.au/products/IDD65011.shtml|title=Tropical Cyclone Forecast Track Map #2 (Nora)|date=21 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180321083733/http://www.bom.gov.au/products/IDD65011.shtml|archive-date=21 March 2018}} On the afternoon of 22 March, the Joint Typhoon Warning Center upgraded the strengthening system to a tropical storm.{{Cite web|url=http://ftp.emc.ncep.noaa.gov/wd20vxt/hwrf-init/decks/bsh162018.dat|title=Track File (Nora)|website=National Oceanic and Atmospheric Administration}} Later on the same day, the Bureau of Meteorology identified that sustained gale-force winds had developed on the northern semicircle of the system;{{Cite web|url=http://www.bom.gov.au/products/IDD65011.shtml|title=Tropical Cyclone Forecast Track Map #8 (Nora)|date=22 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180322153546/http://www.bom.gov.au/products/IDD65011.shtml|archive-date=22 March 2018}} however, the system was still classified as a tropical low as these winds did not extend more than halfway around the circulation centre. On 23 March, the system organized sufficiently into a tropical cyclone, and was named Nora by the BoM. Within the next couple of days, Nora intensified into a Category 3 Severe Tropical Cyclone, before making landfall on the Top End at that intensity. Afterward, Nora gradually began to weaken, degenerating into a tropical low soon afterward. On 26 March, Nora's remnant low stalled, and began to slowly meander counterclockwise over the Top End. On 27 March, Nora's remnant moved westward across the Gulf of Carpentaria. On the next day, Nora's remnant made landfall on the Australian coast once again and dissipated.{{citation needed|date=April 2018}}

{{clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Image = Iris 2018-04-03 1535Z (colored).jpg

| Track = Iris 2018 track.png

| Formed = 24 March (Entered basin)

| Dissipated = 9 April

| 10-min winds = 55

| 1-min winds = 55

| Pressure = 982

}}

During 24 March, the BoM reported that Cyclone Iris had moved into the Australian region from the South Pacific as a Category 1 tropical cyclone, while located about {{convert|520|km|mi|round=5|abbr=on}} to the south of Honiara in the Solomon Islands.{{Cite report|url=http://tgftp.nws.noaa.gov/data/raw/wo/woau01.abrf..txt|title=High Seas Weather Warning for Metarea 10 24 March 2018 07:58z|date=24 March 2018|publisher=Australian Bureau of Meteorology|archive-url=https://archive.today/20240521221845/https://www.webcitation.org/6yBDrsUDN?url=http://gwydir.demon.co.uk/advisories/WOAU01-ABRF_201803240758.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} According to the BoM, the system quickly weakened into a tropical low during that day as it moved further into the Australian region. Conversely, the JTWC reported that Iris had developed into a tropical cyclone at around 04:00 AEST on 25 March (18:00 UTC on 24 March), when there were good divergence aloft and a formative poleward outflow channel, although high vertical wind shear kept impacting the system.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps32.pgtw..txt|title=Tropical Cyclone 17P (Seventeen) Warning Nr 001|date=24 March 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521221803/https://www.webcitation.org/6yBDjztdU?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201803242100.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} Tracking generally southwards along the western periphery of a near-equatoral ridge,{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps32.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 008|date=26 March 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222004/https://www.webcitation.org/6yEAVPwPD?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201803261500.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} Iris remained weak with an exposed low-level circulation centre, which resulted in the final warning from the JTWC being issued at 09:00 UTC on 27 March, as colder sea surface temperatures further eroded the fully sheared system.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps32.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 011|date=27 March 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521221923/https://www.webcitation.org/6yEAUB1SN?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201803270900.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} On 28 March, Iris slowed down and started to exhibit subtropical characteristics.{{Cite web|url=http://www.bom.gov.au/products/IDQ10810.shtml|title=Tropical Cyclone Outlook for Coral Sea Issued at 2:30 pm EST on Wednesday 28 March 2018|date=28 March 2018|publisher=Australian Bureau of Meteorology|archive-url=https://archive.today/20240521222045/https://www.webcitation.org/6yFw8qsLB?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201803280430.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} The subtropical low began to drift northwestward, parallel to the coast of Queensland on 29 March.{{Cite web|url=http://www.bom.gov.au/products/IDQ10810.shtml|title=Tropical Cyclone Outlook for Coral Sea Issued at 2:30 pm EST on Thursday 29 March 2018|date=29 March 2018|publisher=Australian Bureau of Meteorology|archive-url=https://archive.today/20240521222125/https://www.webcitation.org/6yHOntwUU?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201803290430.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}} The JTWC issued a Tropical Cyclone Formation Alert for Iris again on 1 April, due to the increasing amounts of persistent convection and improving low-level banding. These factors indicated that Iris had transitioned back to a tropical low on the same day, as it turned towards the south-southeast.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone Formation Alert|date=1 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222205/https://www.webcitation.org/6yMBvigYq?url=http://gwydir.demon.co.uk/advisories/WTPS21-PGTW_201804011030.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}}{{Cite web|url=http://www.bom.gov.au/products/IDQ10810.shtml|title=Tropical Cyclone Outlook for Coral Sea Issued at 6:10 am EST on Monday 2 April 2018|date=1 April 2018|publisher=Australian Bureau of Meteorology|archive-url=https://archive.today/20240521222246/https://www.webcitation.org/6yNUgxtSD?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201804012010.htm|archive-date=21 May 2024|access-date=15 April 2018|url-status=live|df=dmy-all}}

Both the BoM and the JTWC reported that Iris had redeveloped into a tropical cyclone at around 10:00 AEST (00:00 UTC) on 2 April, supported by Dvorak technique estimates as well as sustained gales recorded by the automatic weather station at Flinders Reef.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/ax/axau21.abrf..txt|title=Tropical Cyclone Technical Bulletin at: 0232 UTC 02/04/2018|date=2 April 2018|publisher=TCWC Brisbane|archive-url=https://archive.today/20240521222325/https://www.webcitation.org/6yNUXR49g?url=http://gwydir.demon.co.uk/advisories/AXAU21-ABRF_201804020232.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=dead|df=dmy-all}}{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 012|date=2 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222205/https://www.webcitation.org/6yMBvigYq?url=http://gwydir.demon.co.uk/advisories/WTPS21-PGTW_201804011030.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=live|df=dmy-all}} A half-day later, the station further recorded maximum sustained winds at {{convert|58|kn}}. Thanks to weak vertical wind shear, warm SSTs at 28 °C, and excellent poleward outflow, the BoM indicated that Iris had further intensified into a Category 2 tropical cyclone at around 04:00 AEST on 3 April (18:00 UTC on 2 April), with estimated 10-minute maximum sustained winds at {{convert|100|km/h|mph|abbr=on|round=5}}.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/ax/axau21.abrf..txt|title=Tropical Cyclone Technical Bulletin at: 1956 UTC 02/04/2018|date=2 April 2018|publisher=TCWC Brisbane|archive-url=https://archive.today/20240521222528/https://www.webcitation.org/6yPGOX2IG?url=http://gwydir.demon.co.uk/advisories/AXAU21-ABRF_201804021956.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=dead|df=dmy-all}}{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 015|date=2 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222645/https://www.webcitation.org/6yPGzFxBw?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201804022100.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=live|df=dmy-all}} Iris became almost stationary on the same day, due to the competing steering influences from a near-equatorial ridge located to the northeast and a subtropical ridge anchored over Australia.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 016|date=3 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222606/https://www.webcitation.org/6yPGyncdS?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201804030300.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=live|df=dmy-all}} Early on 3 April, Iris resumed its south-southeastward track and turned eastward;{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/ax/axau21.abrf..txt|title=Tropical Cyclone Technical Bulletin at: 0136 UTC 03/04/2018|date=3 April 2018|publisher=TCWC Brisbane|archive-url=https://archive.today/20240521222445/https://www.webcitation.org/6yPGO7bdR?url=http://gwydir.demon.co.uk/advisories/AXAU21-ABRF_201804030136.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=dead|df=dmy-all}} at the same time, the low-level circulation centre became partially exposed, with deep convection only persisting over the southern periphery of the storm, showing that the intensification had stopped.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/ax/axau21.abrf..txt|title=Tropical Cyclone Technical Bulletin at: 0718 UTC 03/04/2018|date=3 April 2018|publisher=TCWC Brisbane|archive-url=https://archive.today/20240521222406/https://www.webcitation.org/6yPGNgPWC?url=http://gwydir.demon.co.uk/advisories/AXAU21-ABRF_201804030718.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=dead|df=dmy-all}}

At 04:07 AEST on 4 April (18:07 UTC on 3 April), microwave imagery revealed that Iris briefly had formed a shallow eyewall,{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 019|date=3 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222847/https://www.webcitation.org/6yQl3GYxD?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201804032100.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=live|df=dmy-all}}{{Cite web|url=https://www.nrlmry.navy.mil/tcdat/tc18/SHEM/17P.IRIS/tc_ssmis/color/2degreeticks/20180403.1807.f16.x.colorpct_91h_91v.17PIRIS.50kts-985mb-190S-1502E.057pc.jpg|archive-url=https://web.archive.org/web/20180417022916/https://www.nrlmry.navy.mil/tcdat/tc18/SHEM/17P.IRIS/tc_ssmis/color/2degreeticks/20180403.1807.f16.x.colorpct_91h_91v.17PIRIS.50kts-985mb-190S-1502E.057pc.jpg|url-status=dead|archive-date=17 April 2018|title=20180403.1807.f16.x.colorpct_91h_91v.17PIRIS.50kts-985mb-190S-1502E.057pc.jpg|date=3 April 2018|publisher=United States Naval Research Laboratory|format=JPEG|access-date=16 April 2018}} prompting the JTWC to indicate that Iris reached its peak intensity at 10:00 AEST (00:00 UTC), with the same estimate as the BoM's 30 hours earlier.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/wt/wtps21.pgtw..txt|title=Tropical Cyclone 17P (Iris) Warning Nr 020|date=4 April 2018|publisher=Joint Typhoon Warning Center|archive-url=https://archive.today/20240521222806/https://www.webcitation.org/6yQl2ji5j?url=http://gwydir.demon.co.uk/advisories/WTPS32-PGTW_201804040300.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=live|df=dmy-all}} However, the BoM downgraded Iris to a Category 1 tropical cyclone at 16:00 AEST (06:00 UTC), as the unfavourable environment with moderate northwesterly wind shear, weak upper-level outflow, penetrating dry air, and marginal supportive SSTs at about 26 °C, had begun to impact the sheared system.{{Cite web|url=http://tgftp.nws.noaa.gov/data/raw/ax/axau21.abrf..txt|title=Tropical Cyclone Technical Bulletin at: 0706 UTC 04/04/2018|date=4 April 2018|publisher=TCWC Brisbane|archive-url=https://archive.today/20240521222726/https://www.webcitation.org/6yQk2OmHH?url=http://gwydir.demon.co.uk/advisories/AXAU21-ABRF_201804040706.htm|archive-date=21 May 2024|access-date=16 April 2018|url-status=dead|df=dmy-all}}

{{Clear}}

{{Infobox tropical cyclone small

| Basin = Aus

| Formed = 27 April

| Dissipated = 28 April (Exited basin)

| Image = Flamboyan 2018-04-28 0640Z.jpg

| Track = Flamboyan 2018 track.png

| 10-min winds = 35

| 1-min winds = 45

| Pressure = 1002

}}

Flamboyan formed on 27 April, before moving into the South-West Indian Ocean basin on 28 April. Afterward, the system began intensifying. Flamboyan occurred outside the Australian region, having developed north of 10S in Indonesia's area of responsibility before moving southwest into La Réunion's area of responsibility.

{{clear}}

On 1 December, a tropical low formed to the south of Java.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Monday 4 December 2017|url=http://gwydir.demon.co.uk/advisories/IDW10800_201712010601.htm|archive-url=https://archive.today/20240521220437/https://www.webcitation.org/6vOH7wvl4?url=http://gwydir.demon.co.uk/advisories/IDW10800_201712010601.htm|url-status=dead|date=1 December 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The tropical low rapidly moved southwestward, before dissipating the next day.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Tuesday 5 December 2017|url=http://gwydir.demon.co.uk/advisories/IDW10800_201712020600.htm|archive-url=https://archive.today/20240521220558/https://www.webcitation.org/6vQ2WGXnh?url=http://gwydir.demon.co.uk/advisories/IDW10800_201712020600.htm|url-status=dead|date=2 December 2017|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

On 1 January, TCWC Perth began to track a small, weak tropical low to the south of Bali.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Thursday 4 January 2018|url=http://gwydir.demon.co.uk/advisories/IDW10800_201801010612.htm|archive-url=https://archive.today/20240521221322/https://www.webcitation.org/6wRMh2ajX?url=http://gwydir.demon.co.uk/advisories/IDW10800_201801010612.htm|url-status=dead|date=1 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The system was last mentioned the next day.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Friday 5 January 2018|url=http://gwydir.demon.co.uk/advisories/IDW10800_201801020616.htm|archive-url=https://archive.today/20240521220842/https://www.webcitation.org/6wBB7ACN6?url=http://gwydir.demon.co.uk/advisories/IDW10800_201801020616.htm|url-status=dead|date=2 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

On 14 January, a weak tropical low had developed about {{convert|750|km|mi|abbr=on}} to the northwest of Exmouth.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Wednesday 17 January 2018|url=http://gwydir.demon.co.uk/advisories/IDW10800_201801140606.htm|archive-url=https://archive.today/20240521221402/https://www.webcitation.org/6wSmuH7Fj?url=http://gwydir.demon.co.uk/advisories/IDW10800_201801140606.htm|url-status=dead|date=14 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The tropical low moved in a general westward direction for several days until it was last monitored by TCWC Perth on 19 January.{{cite web|title=Tropical Cyclone Outlook for the Western Region for the period until midnight WST Monday 22 January 2018|url=http://gwydir.demon.co.uk/advisories/IDW10800_201801190600.htm|archive-url=https://archive.today/20240521220800/https://www.webcitation.org/6waLl5qoC?url=http://gwydir.demon.co.uk/advisories/IDW10800_201801190600.htm|url-status=dead|date=19 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

On 27 January, TCWC Brisbane began monitoring on a tropical low-pressure system that was located to the south of the Solomon Islands.{{cite web|title=Tropical Cyclone Outlook for Coral Sea for the period until midnight EST Tuesday 30 January 2018|url=http://gwydir.demon.co.uk/advisories/IDQ10810_201801270430.htm|archive-url=https://archive.today/20240521221241/https://www.webcitation.org/6wmnS4KxH?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201801270430.htm|url-status=dead|date=27 January 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The system had a moderate chance of becoming a tropical cyclone although the system had already crossed basins into the South Pacific where it subsequently became Tropical Cyclone Fehi by 29 January.

On 1 February, a weak tropical low had briefly developed in the Coral Sea.{{cite web|title=Tropical Cyclone Outlook for Coral Sea for the period until midnight EST Sunday 4 February 2018|url=http://gwydir.demon.co.uk/advisories/IDQ10810_201802010430.htm|archive-url=https://web.archive.org/web/20180203140201/http://gwydir.demon.co.uk/advisories/IDQ10810_201802010430.htm|url-status=dead|date=1 February 2018|archive-date=3 February 2018|publisher=Australian Bureau of Meteorology}}

On 9 February, a slow-moving tropical low had developed located about {{convert|450|km|mi|abbr=on}} to the northwest of Cooktown, Queensland.{{cite web|title=Tropical Cyclone Outlook for Coral Sea for the period until midnight EST Monday 12 February 2018|url=http://gwydir.demon.co.uk/advisories/IDQ10810_201802090430.htm|archive-url=https://archive.today/20240521221442/https://www.webcitation.org/6x6Tqiv5b?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201802090430.htm|url-status=dead|date=12 February 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} The system moved westward and was last noticed three days later.{{cite web|title=Tropical Cyclone Outlook for Coral Sea for the period until midnight EST Thursday 15 February 2018|url=http://gwydir.demon.co.uk/advisories/IDQ10810_201802120430.htm|archive-url=https://archive.today/20240521221523/https://www.webcitation.org/6xCZgIvSd?url=http://gwydir.demon.co.uk/advisories/IDQ10810_201802120430.htm|url-status=dead|date=12 February 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}}

On 4 March, a tropical low persisted to the west of Queensland.{{cite web|title=Tropical Cyclone Outlook for the Northern Region, including the Gulf of Carpentaria for the period until midnight CST Wednesday 7 March|url=http://gwydir.demon.co.uk/advisories/IDD10610_201803040445.htm

|archive-url=https://archive.today/20240521221602/https://www.webcitation.org/6xhN07a5R?url=http://gwydir.demon.co.uk/advisories/IDD10610_201803040445.htm

|url-status=dead

|date=4 March 2018|archive-date=21 May 2024|publisher=Australian Bureau of Meteorology}} In the course of two days, the tropical low emerged towards the waters of the Gulf of Carpentaria. The tropical low rapidly dissipated, however, on 9 March.

A weak tropical low near the Solomon Islands was first identified by the Bureau of Meteorology on 17 March. Over the next couple of days, the tropical low meandered over the Solomon Sea.{{Cite web|url=http://www.bom.gov.au/cgi-bin/charts/charts.browse.pl|title=Analysis Chart Archive|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180319221532/http://www.bom.gov.au/cgi-bin/charts/charts.browse.pl|archive-date=2018-03-19|url-status=dead}} The system was last noted by the Bureau of Meteorology on the afternoon of 19 March.{{Cite web|url=http://www.bom.gov.au/qld/forecasts/cyclone.shtml|title=Coral Sea Tropical Cyclone Outlook|date=19 March 2018|website=Bureau of Meteorology|archive-url=https://web.archive.org/web/20180301033147/http://www.bom.gov.au/qld/forecasts/cyclone.shtml|archive-date=1 March 2018|url-status=live|df=dmy-all}}

{{clear}}

Since the start of the 2008–09 season, there has only been one list from which the Bureau of Meteorology has assigned names to tropical cyclones, despite still operating three separate tropical cyclone warning centres (TCWCs) in Perth, Darwin and Brisbane.{{cite web|url=http://www.wmo.int/pages/prog/www/tcp/documents/TCP24_RAVOpPlan_Revised_final.pdf|title=Tropical Cyclone Operational plan for the South Pacific & Southeast Indian Ocean, 2014 Edition|publisher=WMO|access-date=2016-06-12}} These warning centres monitor all tropical cyclones that form within the Australian region, including any within the areas of responsibility of TCWC Jakarta or TCWC Port Moresby. A total of seven tropical cyclones were named by the BOM during the season; these are listed below.

• Hilda
• Irving
• Joyce
• Kelvin
• Linda
• Marcus
• Nora

The TCWC in Jakarta, operated by the Indonesian Agency for Meteorology, Climatology and Geophysics, monitors tropical cyclones from the Equator to 11°S and between the longitudes 90°E and 145°E. Tropical depressions which reached tropical cyclone strength within this region were named by TCWC Jakarta. This occurred a record total of three times this season, and the names used are listed below.

• Cempaka
• Dahlia
• Flamboyan

Tropical cyclones that develop between the Equator and 11°S, between 151°E and 160°E, are assigned names by the TCWC in Port Moresby, Papua New Guinea. Tropical cyclone formation in this area is rare, with no cyclones being named in it since 2007.{{cite web|url=http://www.australiasevereweather.com/cyclones/2008/summ0713a.htm|title=Monthly Global Tropical Cyclone Summary October|author=Gary Padgett|year=2008|publisher=Australian Severe Weather|access-date=2013-07-01|archive-date=4 July 2013|archive-url=https://archive.today/20130704162247/http://www.australiasevereweather.com/cyclones/2008/summ0713a.htm|url-status=dead}} A chronological list is not used; rather, names are selected in a random order from a pool of names.

Due to the damage that Cyclone Marcus caused in Darwin, along with its subsequent intensification into a powerful Category 5 severe tropical cyclone, the BOM retired the name Marcus from its naming list. It was replaced by Marco.{{cite web |title=Tropical cyclone names |url=http://www.bom.gov.au/cyclone/tropical-cyclone-knowledge-centre/understanding/tc-names/ |website=Bureau of Meteorology |archive-url=https://web.archive.org/web/20200902145055/http://www.bom.gov.au/cyclone/tropical-cyclone-knowledge-centre/understanding/tc-names/ |access-date=2 September 2020|archive-date=2 September 2020 }}

{{Pacific areas affected (Top)}}

|-

| 01U || {{sort|170808|8 August}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|035|{{convert|35|km/h|mph|abbr=on|round=5}}}}|| bgcolor=#{{storm color|TL}}|{{convert|1005|hPa|inHg|sigfig=4|abbr=on|comma=off|sortable=on}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Cempaka || {{sort|20171121|21 – 29 November}} || bgcolor=#{{storm color|A2}}|{{sort|2|Category 2 tropical cyclone}} || bgcolor=#{{storm color|A2}}|{{convert|60|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A2}}|{{convert|990|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Indonesia || {{sort|1|$83.6 million}} || {{nts|41}} ||

|-

| 04U || {{sort|171126|26 – 29 November}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{convert|1005|hPa|inHg|sigfig=4|abbr=on|comma=off|sortable=on}} || Indonesia || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Dahlia || {{sort|20171125|25 November – 4 December}} || bgcolor=#{{storm color|A2}}|Category 2 tropical cyclone || bgcolor=#{{storm color|A2}}|{{convert|55|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A2}}|{{convert|980|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Indonesia, Christmas Island || {{sort|1|Unknown}} || {{sort|1|Unknown}} ||

|-

| 05U || {{sort|171201|1–2 December}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{Sort|1016|Not specified}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Hilda || {{sort|171226|26–29 December}} || bgcolor=#{{storm color|A2}}|Category 2 tropical cyclone || bgcolor=#{{storm color|A2}}|{{Sort|100|{{convert|100|km/h|mph|abbr=on|round=5}}}} || bgcolor=#{{storm color|A2}}|{{convert|980|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Western Australia || Minor || None ||

|-

| 07U || {{sort|180101|1–2 January}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{convert|1006|hPa|inHg|sigfig=4|abbr=on|comma=off|sortable=on}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Irving || {{sort|180103|3–6 January}} || bgcolor=#{{storm color|A1}}|Category 1 tropical cyclone || bgcolor=#{{storm color|A1}}|{{convert|40|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A1}}|{{convert|993|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Joyce || {{sort|180106|6–13 January}} || bgcolor=#{{storm color|A2}}|Category 2 tropical cyclone || bgcolor=#{{storm color|A2}}|{{convert|50|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A2}}|{{convert|975|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Western Australia || {{sort|0|None}} || {{sort|0|None}} ||

|-

| 10U || {{sort|180114|14–19 January}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{Sort|1016|Not specified}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| 11U || {{sort|180120|20 January –
1 February}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|075|{{convert|75|km/h|mph|abbr=on|round=5}}}}|| bgcolor=#{{storm color|TL}}|{{Sort|0985|{{convert|985|hPa|inHg|sigfig=4|abbr=on}}}} || Top End, Western Australia || {{sort|0|None}} || {{sort|0|None}} ||

|-

| 12U || {{sort|180123|23–24 January}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{Sort|1016|Not specified}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Fehi || {{sort|20180126|26–28 January}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{convert|30|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|TL}}|{{convert|993|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Solomon Islands || {{sort|0|None}} || {{sort|0|None}} ||

|-

| 14U || {{sort|180201|1 February}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{Sort|1016|Not specified}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| 15U || {{sort|180209|9–12 February}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{Sort|1016|Not specified}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Kelvin || {{sort|180211|11–21 February}} || bgcolor=#{{storm color|A3}}|Category 3 severe tropical cyclone || bgcolor=#{{storm color|A3}}|{{Sort|150|{{convert|150|km/h|mph|abbr=on|round=5}}}}|| bgcolor=#{{storm color|A3}}|{{convert|955|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Top End, Western Australia,
South Australia || {{ntsp|25000000||$}} || None || {{cite web|last1=Dollery|first1=Rebecca|title=Kimberley flooding leaves $16 million road repair bill after two cyclones|url=http://mobile.abc.net.au/news/2018-03-15/kimberley-flooding-leaves-16m-damage-bill-on-roads/9547168|website=ABC news|date=14 March 2018|access-date=17 March 2018}}{{Cite web|url=http://thoughtleadership.aonbenfield.com/Documents/20180509-ab-analytics-if-april-global-recap.pdf|title=Global Catastrophe Recap April 2018|website=thoughtleadership.aonbenfield.com|publisher=Aon Benfield|access-date=17 May 2018|archive-date=4 June 2019|archive-url=https://web.archive.org/web/20190604102833/http://thoughtleadership.aonbenfield.com/Documents/20180509-ab-analytics-if-april-global-recap.pdf|url-status=dead}}

|-

| 18U || {{sort|180304|4–9 March}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{convert|1001|hPa|inHg|sigfig=4|abbr=on|comma=off|sortable=on}} || Northern Territory || {{ntsp|40000000||$}} || None ||

|-

| Linda || {{sort|20180311|11 – 16 March}} || bgcolor=#{{storm color|A1}}|Category 1 tropical cyclone || bgcolor=#{{storm color|A1}}|{{convert|40|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A1}}|{{convert|993|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Solomon Islands, New Caledonia
Southern Queensland || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Marcus || {{sort|180314|14–24 March}} || bgcolor=#{{storm color|A5}}|Category 5 severe tropical cyclone || bgcolor=#{{storm color|A5}}|{{Sort|250|{{convert|250|km/h|mph|abbr=on|round=5}}}}|| bgcolor=#{{storm color|A5}}|{{Sort|0905|{{convert|905|hPa|inHg|sigfig=4|abbr=on}}}} || Tanimbar Islands, East Timor, Top End,
Kimberley || {{ntsp|75000000||$}} || None ||

|-

| Nora || {{sort|180319|19–26 March}} || bgcolor=#{{storm color|A3}}| Category 3 severe tropical cyclone || bgcolor=#{{storm color|A3}}|{{Sort|155|{{convert|155|km/h|mph|abbr=on|round=5}}}}|| bgcolor=#{{storm color|A3}}|{{Sort|0958|{{convert|958|hPa|inHg|sigfig=4|abbr=on}}}} || New Guinea, Aru Islands,
Northern Territory, Queensland || {{ntsp|25000000||$}} || None ||

|-

| 23U || {{sort|180323|23–25 March}} || bgcolor=#{{storm color|TL}}|Tropical low || bgcolor=#{{storm color|TL}}|{{Sort|000|Not specified}}|| bgcolor=#{{storm color|TL}}|{{convert|1004|hPa|inHg|sigfig=4|abbr=on|comma=off|sortable=on}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

| Iris || {{sort|20180324|24 March – 9 April}} || bgcolor=#{{storm color|A2}}| Category 2 tropical cyclone || bgcolor=#{{storm color|A2}}|{{convert|55|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A2}}|{{convert|982|hPa|inHg|sigfig=4|abbr=on|sortable=on}} || Solomon Islands, Queensland || {{sort|1|Minimal}} || {{sort|0|None}} ||

|-

| Flamboyan || {{sort|20180427|27–28 April}} || bgcolor=#{{storm color|A1}}|Category 1 tropical cyclone || bgcolor=#{{storm color|A1}}|{{convert|35|kn|km/h mph|round=5|order=out|abbr=on|sortable=on}} || bgcolor=#{{storm color|A1}}|{{convert|1002|hPa|inHg|sigfig=4|abbr=on|sortable=on|comma=off}} || None || {{sort|0|None}} || {{sort|0|None}} ||

|-

{{TC Areas affected (Bottom)|TC's=23 systems|dates=8 August –
28 April|winds={{convert|230|km/h|mph|abbr=on|round=5}}|pres={{convert|905|hPa|inHg|sigfig=4|abbr=on}}|damage={{ntsp|248600000||$}} |deaths=41|Refs=}}

{{Portal|Tropical cyclones}}

• Weather of 2017 and 2018
• Australian region tropical cyclone
• Tropical cyclones in 2017 and 2018
• List of Southern Hemisphere tropical cyclone seasons
• Atlantic hurricane seasons: 2017, 2018
• Pacific hurricane seasons: 2017, 2018
• Pacific typhoon seasons: 2017, 2018
• North Indian Ocean cyclone seasons: 2017, 2018
• 2017–18 South-West Indian Ocean cyclone season
• 2017–18 South Pacific cyclone season

{{reflist}}

{{Commons category}}

• [http://www.bom.gov.au/cyclone/ Australian Bureau of Meteorology]
• [http://www.metoc.navy.mil/jtwc/ Joint Typhoon Warning Center] {{Webarchive|url=https://web.archive.org/web/20180202190141/http://www.metoc.navy.mil/jtwc/ |date=2 February 2018 }}
• [http://meteo.bmkg.go.id/siklon/ Tropical Cyclone Warning Center Jakarta] {{in lang|id}}
• [http://www.pngmet.gov.pg/warnings/smartalert/ Tropical Cyclone Warning Center Port Moresby]

{{2017–18 Australian region cyclone season buttons}}

{{Tropical cyclone season|2017|split-year=y}}

{{TC Decades|Year=2010|basin=Australian region|type=cyclone|shem=yes}}

{{DEFAULTSORT:2017-18 Australian Region Cyclone Season}}

Category:Australian region cyclone seasons

2017 AUS

2018 AUS