Cyclone Ilsa

{{Short description|Category 5 Australian region cyclone in 2023}}

{{Hatnote group|

{{Distinguish|Cyclone Elsa|Cyclone Isa}}

{{Other storms|List of storms named Ilsa|the 2023 Australian region cyclone}}

}}

{{Use dmy dates|date=December 2023}}

{{Infobox weather event

| name = Severe Tropical Cyclone Ilsa

| image = Ilsa 2023-04-13 0830Z.jpg

| caption = Ilsa near peak intensity while approaching Western Australia on 13 April

| formed = {{start date|2023|04|06|df=y}}

| dissipated = {{start date|2023|04|15|df=y}}

}}{{Infobox weather event/Aus

| winds = 125

| gusts = 175

| pressure = 915

}}{{Infobox weather event/JTWC

| winds = 140

| pressure = 920

}}{{Infobox weather event/Effects

| year = 2023

| damages = 10200000

| damages-prefix = ≥

| deaths = 8

| missing =

| affected = Maluku, Lesser Sunda Islands, Northern Territory, Western Australia

}}{{Infobox weather event/Footer

| season = 2022–23 Australian region cyclone season

}}

Severe Tropical Cyclone Ilsa was a powerful tropical cyclone that struck Western Australia in April 2023. The sixth named storm, and the fifth severe tropical cyclone of the 2022–23 Australian region cyclone season, Ilsa formed from a tropical low off the coast of Indonesia on 6 April. It fluctuated in intensity and became a Category 1 tropical cyclone on 11 April, after deep convection became symmetric around the low-level circulation center. Ilsa then rapidly intensified the following day and reached its peak intensity as a Category 5 severe tropical cyclone on the Australian tropical cyclone intensity scale. Ten-minute sustained winds were estimated as {{convert|125|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}}, with a central barometric pressure of {{convert|915|hPa|inHg|abbr=on|sigfig=4|comma=off}}. One-minute sustained winds reached {{convert|140|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}} at this time, equivalent to a Category 5 hurricane on the Saffir–Simpson hurricane wind scale. Additionally, record-breaking ten-minute sustained wind speed of {{convert|219|km/h|mph|abbr=on}} were measured at Bedout Island, beating the previous record of Cyclone George in 2007. Ilsa made landfall roughly {{convert|120|km|mi|round=5|abbr=on}} northeast of Port Hedland, Western Australia. Inland, Ilsa weakened to a low-end tropical cyclone with {{convert|45|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}} winds. Overall, Ilsa caused over US$10 million in damage, and caused 8 deaths after two boats capsized off the coast of Western Australia.

Meteorological history

{{Storm path|Ilsa 2023 path.png|colors=new|note={{refn|group=nb|name=Track|The position of Ilsa's Category 5 peak is not depicted in this graphic as it is an asynoptic point (i.e. not at the 6-hour intervals of all other points) occurring at 09:00 UTC 13 April.}}}}

An active burst of the Madden–Julian oscillation in conjunction with a westward-propagating equatorial Rossby wave led to the formation of a tropical low on 6 April. The low—designated 23U by the Bureau of Meteorology (BoM)—slowly moved southwest around a mid-level ridge above north-eastern Australia, as convection persisted near the system's circulation.{{cite report|first1=Matthew|last1=Boterhoven|first2=Linda|last2=Paterson|title=Severe Tropical Cyclone Ilsa|url=http://www.bom.gov.au/cyclone/history/pdf/Ilsa2023_report.pdf|publisher=Australian Bureau of Meteorology|date=6 June 2023|access-date=28 November 2023}} By the next day, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert on the system, citing the slightly favourable environmental conditions encompassing poleward outflow and warm sea surface temperatures (SST) of {{convert|29|-|30|C|F}} subduing high vertical wind shear.{{cite JTWC|type=TCFA|date=7 April 2023|designation=98S|url=https://www.metoc.navy.mil/jtwc/products/sh9823web.txt|archive-url=https://archive.today/20230407222100/https://www.wis-jma.go.jp/d/o/PGTW/Alphanumeric/Warning/Tropical_cyclone/20230407/200000/A_WTXS21PGTW072000_C_RJTD_20230407201417_38.txt|archive-date=7 April 2023}} Convection continued to strengthen west of the exposed low-level circulation centre (LLCC) as it scattered under a strong temperature gradient. During the following day, the JTWC initiated advisories on the system and classified it as Tropical Cyclone 18S.{{cite JTWC|designation=18S|type=prog|no=1|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|archive-url=https://web.archive.org/web/20230408000000/https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|date=8 April 2023|archive-date=8 April 2023|name=Eighteen|category=tc}} [https://wiki.chlod.net/jtwc/prog/2023-04-08-2020-sh1823prog.txt Alt URL]

More consolidation took place, with spiral rainbands present in all quadrants of the storm wrapping around the LLCC obscured by a cold dense overcast (CDO).{{cite JTWC|designation=18S|type=prog|no=2|url=https://wiki.chlod.net/jtwc/prog/2023-04-09-0200-sh1823prog.txt|date=8 April 2023|access-date=4 December 2023|name=Eighteen|category=tc}} Easterly wind shear decreased as a result of the intense convective mass causing upper-level winds around it.{{cite JTWC|designation=18S|type=prog|no=3|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|archive-url=https://web.archive.org/web/20230409122158/https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|date=9 April 2023|archive-date=9 April 2023|name=Eighteen}} Over the subsequent days, the low steadily drifted to the southwest, but due to a surge of unfavourable wind shear, intensification was delayed.{{cite JTWC|type=prog|designation=18S|name=Eighteen|category=tc|no=9|date=9 April 2023|archive-date=9 April 2023|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|archive-url=https://web.archive.org/web/20230409000000/https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt}} [https://wiki.chlod.net/jtwc/prog/2023-04-10-2100-sh1823prog.txt Alt URL] However, levels of wind shear later diminished, and by late on 11 April, the BoM reported that the symmetrical tropical low had developed into a Category 1 tropical cyclone and named it Ilsa. The expanding CDO completely obscured the circulation as westerly dry air attempted to enter the system from the north. Consequently, Ilsa became a Category 1-equivalent tropical cyclone on the Saffir–Simpson scale (SSHWS).{{cite JTWC|designation=18S|type=prog|no=12|url=https://wiki.chlod.net/jtwc/prog/2023-04-11-1500-sh1823prog.txt|date=11 April 2023|name=Ilsa|category=tc}} A burst of convection occurred near Ilsa's center, and the BoM reported that it briefly strengthened into a Category 2 cyclone.{{cite web |date=11 April 2023 |title=Tropical Cyclone Technical Bulletin (Western Region) |url=http://tropicalcyclonedata.net/adv/arch/axau01aprf_111348.txt |publisher=Australian Bureau of Meteorology |access-date=12 April 2023 |archive-date=12 April 2023 |archive-url=https://web.archive.org/web/20230412073429/http://tropicalcyclonedata.net/adv/arch/axau01aprf_111348.txt|url-status=live }} On the same day, Ilsa rapidly intensified into a Category 3 severe tropical cyclone within a favourable environment of low shear and warm SST.{{cite web |date=12 April 2023 |title=Tropical Cyclone Technical Bulletin (Western Region) |url=http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDW27600.txt|publisher=Australian Bureau of Meteorology |access-date=12 April 2023 |archive-date=12 April 2023 |archive-url=https://archive.today/20230412083824/http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDW27600.txt|url-status=live }} Ilsa then underwent steady intensification under persistent wind shear, as SST and ocean heat content increased along the way, with cloud top temperatures of at least {{convert|-92|C|F}}.{{cite JTWC|type=prog|designation=18S|name=Ilsa|category=tc|no=13|date=11 April 2023|access-date=5 December 2023|url=https://wiki.chlod.net/jtwc/prog/2023-04-11-2110-sh1823prog.txt}} A mid-level trough passed south of the system, eroding the steering ridge, and by 12 April, Ilsa changed course to be more southerly.

Ilsa displayed an eye feature in microwave imaging, with vortical hot towers indicating eye development.{{cite JTWC|type=prog|no=14|designation=18S|name=Ilsa|category=tc|date=12 April 2023|access-date=5 December 2023|url=https://wiki.chlod.net/jtwc/prog/2023-04-12-0310-sh1823prog.txt}} The eye in the symmetric system later became visible on satellite imagery as rainbands tightened after intensifying to a Category 3-equivalent tropical cyclone.{{cite JTWC|designation=18S|type=prog|no=17|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|date=12 April 2023|archive-date=12 April 2023|archive-url=https://web.archive.org/web/20230412000000/https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|name=Ilsa|category=tc}} [https://wiki.chlod.net/jtwc/prog/2023-04-12-2000-sh1823prog.txt Alt URL] Later the next day, the BoM assessed the storm to have attained ten-minute sustained winds of {{convert|90|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}}, ranking it as a Category 4 severe tropical cyclone.{{cite report|title=Tropical Cyclone Forecast Track Map for Severe Tropical Cyclone Ilsa|url=http://www.bom.gov.au/products/IDW60281.shtml|date=13 April 2023|accessdate=13 April 2023|publisher=Australian Bureau of Meteorology|archive-date=13 April 2023|archive-url=https://archive.today/20230413013007/http://www.bom.gov.au/products/IDW60281.shtml}} Owing to the substantial radial outflow and very warm SST, despite moderate wind shear, Ilsa intensified into a Category 4-equivalent tropical cyclone on the SSHWS.{{cite JTWC|designation=18S|type=prog|no=18|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|date=13 April 2023|archive-date=13 April 2023|archive-url=https://web.archive.org/web/20230413024154/https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|name=Ilsa|category=tc}} Later that day, Ilsa strengthened further to its peak intensity as a Category 5-equivalent tropical cyclone with 1-minute sustained winds of {{convert|140|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}}.{{cite web |title=JTWC Best Track on Tropical Cyclone Ilsa (18S) |url=https://www.ssd.noaa.gov/PS/TROP/DATA/ATCF/JTWC/bsh182023.dat |url-status=live |access-date=14 April 2023 |publisher=National Oceanic and Atmospheric Administration |archive-date=14 April 2023 |archive-url=https://web.archive.org/web/20230414131311/https://www.ssd.noaa.gov/PS/TROP/DATA/ATCF/JTWC/bsh182023.dat }} An automated weather station on Rowley Shoals recorded wind gusts up to {{convert|127|kn|km/h mph|abbr=on|order=out|sortable=on}}.{{Cite news |date=13 April 2023 |title=Severe Tropical Cyclone Ilsa to cross WA coast as powerful category five system |language=en-AU |work=ABC News |url=https://www.abc.net.au/news/2023-04-13/wa-cyclone-ilsa-upgraded-category-5-pilbara-kimberley-/102219020 |access-date=13 April 2023 |archive-date=13 April 2023 |archive-url=https://web.archive.org/web/20230413071626/https://www.abc.net.au/news/2023-04-13/wa-cyclone-ilsa-upgraded-category-5-pilbara-kimberley-/102219020 |url-status=live }} Later that same day, Ilsa had become a Category 5 severe tropical cyclone with sustained winds of {{convert|125|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}} and the lowest atmospheric pressure of {{convert|915|hPa|inHg|sigfig=4|abbr=on}}. Around that time, the eye was measured from its initial {{convert|22|nmi|km mi|order=out|abbr=on}} to {{convert|14|nmi|km mi|order=out|abbr=on}}.

Ilsa made landfall in a coast {{convert|120|km|mi|abbr=on}} east-northeast of Port Hedland, with 10-minute sustained winds of {{convert|115|kn|km/h mph|order=out|abbr=on|round=5}}.{{cite web |date=13 April 2023 |title=Tropical Cyclone Technical Bulletin (Western Region) |url=http://tropicalcyclonedata.net/adv/arch/axau01aprf_131906.txt|publisher=Australian Bureau of Meteorology |access-date=13 April 2023 |archive-date=13 April 2023 |archive-url=https://web.archive.org/web/20230413211247/http://tropicalcyclonedata.net/adv/arch/axau01aprf_131906.txt|url-status=live }} Following this, the JTWC discontinued the issuing of advisories of Ilsa, as the storm accelerated inland and rapidly deteriorated from land interaction and high vertical wind shear.{{cite JTWC|designation=18S|type=warn|no=21|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|date=13 April 2023|archive-date=14 April 2023|archive-url=https://web.archive.org/web/20230414045851/https://www.metoc.navy.mil/jtwc/products/sh1823web.txt|name=Ilsa|category=tc}} While over Western Australia, Ilsa weakened to a Category 4 severe tropical cyclone with {{convert|95|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}} winds.{{cite web |date=13 April 2023 |title=Tropical Cyclone Technical Bulletin (Western Region) |url=http://tropicalcyclonedata.net/adv/arch/axau01aprf_131906.txt|publisher=Australian Bureau of Meteorology |access-date=13 April 2023 |archive-date=14 April 2023 |archive-url=https://web.archive.org/web/20230414073750/http://tropicalcyclonedata.net/adv/arch/axau01aprf_131906.txt|url-status=live }} The storm continued to weaken with a deteriorating cloud signature.{{cite web |date=14 April 2023 |title=Tropical Cyclone Technical Bulletin (Western Region) |url=http://tropicalcyclonedata.net/adv/arch/axau01aprf_131906.txt|publisher=Australian Bureau of Meteorology |access-date=15 April 2023 |archive-date=15 April 2023 |archive-url=https://web.archive.org/web/20230415025742/http://tropicalcyclonedata.net/adv/arch/axau01aprf_140652.txt|url-status=live }} During 14 April, another mid-level trough enhanced over Western Australia, steering Ilsa south then southeast. Ilsa fell below tropical cyclone strength at 12:00 UTC. Ilsa was last noted on 15 April, with its remnants moving east before dissipating over Central Australia.

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Preparations and impact

File:Ilsa 2023-04-12 0510Z.jpg

Gale-force winds with gusts up to {{convert|90|kn|km/h mph|order=out|abbr=on|round=5|sortable=on}}, and heavy rain might occur on 9 April between Kalumburu and Kuri Bay in the state's north.{{Cite web |date=9 April 2023 |title=Tropical cyclone 'Ilsa' could hit parts of WA coast |url=https://www.watoday.com.au/national/western-australia/tropical-cyclone-ilsa-could-hit-parts-of-wa-coast-20230409-p5cz4m.html |access-date=9 April 2023 |website=WAtoday |language=en |archive-date=9 April 2023 |archive-url=https://web.archive.org/web/20230409211105/https://www.watoday.com.au/national/western-australia/tropical-cyclone-ilsa-could-hit-parts-of-wa-coast-20230409-p5cz4m.html |url-status=live }} Squally thunderstorms are also anticipated in far northern Kimberley. Residents across the coast of Pilbara evacuated as high tides, large waves and inundation were possible, along with a highway closure along the Pilbara coast.{{cite news|publisher=Alarabiya News|title=Cyclone Ilsa: Residents flee as intensifying cyclone approaches northwest Australia|date=12 April 2023|access-date=12 April 2023|url=https://english.alarabiya.net/News/world/2023/04/12/Cyclone-Ilsa-Residents-flee-as-intensifying-cyclone-approaches-northwest-Australia|archive-date=12 April 2023|archive-url=https://web.archive.org/web/20230412223818/https://english.alarabiya.net/News/world/2023/04/12/Cyclone-Ilsa-Residents-flee-as-intensifying-cyclone-approaches-northwest-Australia|url-status=live}}{{Cite web |last= |first= |title=Australia's most powerful cyclone in 8 years to cross coast |url=https://abcnews.go.com/Technology/wireStory/category-4-cyclone-ilsa-lashes-northwest-australian-coast-98547185 |access-date=14 April 2023 |website=ABC News |language=en |archive-date=14 April 2023 |archive-url=https://web.archive.org/web/20230414102504/https://abcnews.go.com/Technology/wireStory/category-4-cyclone-ilsa-lashes-northwest-australian-coast-98547185 |url-status=live }} In anticipation of Ilsa, the BoM issued a warning for Western Australia’s Kimberley and Pilbara regions.{{Cite web |last=Jarred |first=Cross |date=12 April 2023 |title=Pilbara and Kimberely prepare to shelter as Cyclone Ilsa reaches category 3, continues towards coast |url=https://nit.com.au/12-04-2023/5577/pilbara-and-kimberely-prepare-to-shelter-as-cyclone-ilsa-reaches-category-3-continues-towards-coast |access-date=13 April 2023}}

Additional emergency workers, aircraft and essential supplies have also been sent to the region.{{Cite web |title=Western Australia battens down as Cyclone Ilsa gathers strength |url=https://www.1news.co.nz/2023/04/12/western-australia-battens-down-as-cyclone-ilsa-gathers-strength/ |access-date=13 April 2023 |website=1 News |language=en |archive-date=12 April 2023 |archive-url=https://web.archive.org/web/20230412085325/https://www.1news.co.nz/2023/04/12/western-australia-battens-down-as-cyclone-ilsa-gathers-strength/ |url-status=live }} On 12 April, the Department of Fire and Emergency Services (DFES) issued a cyclone yellow alert, and urged residents to be prudent and to take action and prepare to shelter.{{Cite web |last=Anderson |first=Anthony |date=13 April 2023 |title=Tropical Cyclone Ilsa intensifies further to category 4 system |url=https://www.news.com.au/national/western-australia/tropical-cyclone-ilsa-intensifies-further-to-category-4-system/news-story/2c5874ad015fa89e0ce1959b49b1b3b2 |access-date=13 April 2023}} At least 700 residents were being evacuated to cyclone shelters prior to the storm.{{Cite news |date=13 April 2023 |title=Cyclone Ilsa: Western Australia braces for category 4 storm |language=en-GB |work=BBC News |url=https://www.bbc.com/news/world-australia-65259342 |access-date=13 April 2023 |archive-date=13 April 2023 |archive-url=https://web.archive.org/web/20230413041807/https://www.bbc.com/news/world-australia-65259342 |url-status=live }} Port Hedland mayor Peter Carter said damaging winds could turn flying debris into "missiles in the air".{{Cite web |title=Australia's northwest braces for strongest cyclone in a decade |url=https://www.aljazeera.com/news/2023/4/13/australias-northwest-braces-for-strongest-cyclone-in-a-decade |access-date=13 April 2023 |website=www.aljazeera.com |language=en}}

Western Australia's Emergency Department on 15 April assessed damage from Ilsa,{{Cite news |last= |date=15 April 2023 |title=Western Australia assesses Cyclone Ilsa's 'path of destruction' |language=en |work=Reuters |url=https://www.reuters.com/world/asia-pacific/western-australia-assesses-cyclone-ilsas-path-destruction-2023-04-15/ |access-date=15 April 2023 |archive-date=15 April 2023 |archive-url=https://web.archive.org/web/20230415145604/https://www.reuters.com/world/asia-pacific/western-australia-assesses-cyclone-ilsas-path-destruction-2023-04-15/ |url-status=live }} with at least eight personnel were sent to the Great Northern Highway fires near Pippingarra.{{Cite news |date=14 April 2023 |title=Engineers to assess how to cyclone-proof outback buildings as Ilsa clean-up gets underway |language=en-AU |work=ABC News |url=https://www.abc.net.au/news/2023-04-15/cylone-ilsa-clean-up-continues-in-the-pilbara/102223024 |access-date=15 April 2023 |archive-date=14 April 2023 |archive-url=https://web.archive.org/web/20230414212520/https://www.abc.net.au/news/2023-04-15/cylone-ilsa-clean-up-continues-in-the-pilbara/102223024 |url-status=live }} The manager of Pardoo Station claimed that the estimated damage was at least A$15 million (US$10.2 million).{{cite news|last=Stanley|first=Michelle|url=https://www.abc.net.au/news/2023-06-15/pardoo-station-tropical-cyclone-ilsa-damage-clean-up-continues/102470386|title=Cyclone Ilsa clean-up continues on billion-dollar Pardoo Station after 'mind-boggling' damage|work=ABC News|date=15 June 2023|access-date=15 June 2023|archive-url=https://web.archive.org/web/20230615011209/https://www.abc.net.au/news/2023-06-15/pardoo-station-tropical-cyclone-ilsa-damage-clean-up-continues/102470386|archive-date=15 June 2023|url-status=live}} Five accommodation sheds were entirely blown away by the storm at the Pardoo Roadhouse, and emergency officials have been unable to locate them.{{Cite web |title=Cyclone Ilsa leaves million-dollar damage bill after record winds but storm threat 'not over yet' |url=https://www.9news.com.au/national/cyclone-ilsa-update-warning-tropical-storm-downgraded-record-wind-gusts-western-australia-northern-territory/acbf886e-e62c-4aec-b840-62700e37ea8d |url-status=live |archive-url=https://web.archive.org/web/20230414104949/https://www.9news.com.au/national/cyclone-ilsa-update-warning-tropical-storm-downgraded-record-wind-gusts-western-australia-northern-territory/acbf886e-e62c-4aec-b840-62700e37ea8d |archive-date=14 April 2023 |access-date=15 April 2023 |website=www.9news.com.au}} The Roadhouse suffered an estimated AU$4 million in damage, with the roof being torn off and recently-installed solar panels being blown away during the cyclone.{{Cite web |last=Stanley |first=Michelle |last2=Gudgeon |first2=Kelly |date=10 January 2024 |title=Pardoo Roadhouse cyclone recovery 'sabotaged' after multiple break-ins, leaving owners 'angry and devastated' |url=https://www.abc.net.au/news/2024-01-10/pardoo-roadhouse-wa-break-ins-cyclone-recovery/103304650 |access-date=11 February 2025 |website=Australian Broadcasting Corporation}}{{Cite web |last=Walsh |first=Kayla |date=20 March 2024 |title=Pardoo Roadhouse reopens a year on from Cyclone Ilsa devastation |url=https://bigrigs.com.au/2024/03/20/pardoo-roadhouse-reopens-a-year-on-from-cyclone-ilsa-devastation/ |access-date=11 February 2025 |website=www.bigrigs.com.au}} The Roadhouse reopened for business in March 2024. Apart from Pardoo, acting emergency services minister Sue Ellery said that the damage caused by Ilsa was "fairly minimal."{{Cite web |date=14 April 2023 |title=Powerful Cyclone Ilsa lashes Australia's northwest coast |url=https://wtop.com/australia/2023/04/powerful-cyclone-ilsa-lashes-australias-northwest-coast/ |access-date=15 April 2023 |website=WTOP News |language=en |archive-date=15 April 2023 |archive-url=https://web.archive.org/web/20230415145600/https://wtop.com/australia/2023/04/powerful-cyclone-ilsa-lashes-australias-northwest-coast/ |url-status=live }}

Two boats containing 19 men total illegally fishing off the coast of Western Australia were caught in the cyclone. One of the boats was found shipwrecked on Bedwell Island, while the other boat sank. The 11 people on the shipwrecked boat were rescued, while one survivor was found from the sunken boat. The other 8 fishermen died.{{Cite news |last1=Murphy |first1=Hannah |last2=Barker |first2=Anne |last3=Brann |first3=Matt |last4=Bieundurry |first4=Tallulah |date=3 May 2023 |title=Indonesian fishermen who survived cyclone that killed eight off WA coast won't face charges |language=en-AU |work=ABC News |url=https://www.abc.net.au/news/2023-05-03/australian-government-wont-charge-indonesian-fishers-shipwreck/102296416 |access-date=10 May 2023}}

Retirement

As a result of the damage associated with the storm, the name Ilsa was removed from the list of Australian region cyclone names and will never be used again for a tropical cyclone in that basin. It was replaced by Isabella for future seasons.{{RA V Tropical cyclone operational plan}}

See also

{{Portal|Tropical cyclones|Australia}}

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Notes

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References

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