Weather of 2017

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{{main|2016–17 North American winter|2017–18 North American winter}}

Winter weather in 2017 kicked off with a winter storm from January 4-8. This winter storm causes six fatalities.{{cite news|url=https://weather.com/storms/winter/news/winter-storm-helena-impacts|title=Winter Storm Helena Kills 6; Cripples Travel in the South|work=The Weather Channel|date=January 8, 2017}} Around a week later, an ice storm causes 9 fatalities.{{citation needed|date=September 2022}} Portland, Oregon saw the most snow in a single day in 20 years.{{Cite journal|url=https://ui.adsabs.harvard.edu/abs/2017AGUFM.A53C2261D/abstract#:~:text=On%20January%2010%2D12th%2C%202017,were%20forced%20to%20shut%20down.|bibcode = 2017AGUFM.A53C2261D|title = Winter Storm Jupiter of January 2017: Meteorological Drivers, Synoptic Evolution, and Climate Change Considerations in Portland, Oregon|last1 = Dean|first1 = S.|last2 = Loikith|first2 = P. C.|journal = AGU Fall Meeting Abstracts|year = 2017|volume = 2017|pages = A53C–2261}} Around a week after that, a nor'easter from the Tornado outbreak of January 21-23, 2017 caused a death in Philadelphia,{{cite web | url = https://weather.com/news/news/noreaster-impacts-mid-atlantic-northeast-new-england | title = Nor'easter Hammers Mid-Atlantic, Northeast; 1 Killed in North Philadelphia | first = Sean |last = Breslin | date = January 23, 2017 | access-date = January 23, 2017 | work = The Weather Channel }} It also resulted in 100 accidents in Quebec.{{cite news|author=Kamila Hinkson|publisher=CBC News|date=January 24, 2017|access-date=January 26, 2017|title=Treacherous conditions across southern Quebec after freezing rain, snow|url=http://www.cbc.ca/news/canada/montreal/montreal-weather-1.3949439}} After a lull in activity, winter weather resumed on February 9, which caused a man to die in Manhattan.{{cite web|url=http://newyork.cbslocal.com/2017/02/09/doorman-dies-winter-storm/|title=Doorman Dies After Falling Through Glass Window While Shoveling Snow|work=cbslocal.com|date=February 9, 2017 |access-date=9 February 2017}} New York City had record warmth the day before.{{Cite news|url=https://www.usatoday.com/story/weather/2017/02/08/winter-storm-paste-northeast-heavy-snow/97653146/|title=Biggest snowstorm of winter to dump a foot in Northeast|last1=Rice|first1=Doyle|date=February 8, 2017|newspaper=USA Today|access-date=February 9, 2017|publisher=TEGNA|last2=Eversley|first2=Melanie}} Then, another winter storm rode up the East Coast a few days later, killing two.{{cite web|type=Report|author=Sean Ryan|url=https://www.wpc.ncep.noaa.gov/storm_summaries/event_reviews/2017/NortheastUS_WinterStorm_Feb2017.pdf |title=Event Review |work=Weather Prediction Center |date=2017|access-date=2021-03-30}}{{cite news|author=The Weather Channel |url=https://weather.com/storms/winter/news/winter-storm-orson-impacts |title=Winter Storm Orson Turns Deadly: Heavy Snow, High Winds Doing Damage in Northeast|date=February 13, 2017 |access-date=2021-03-30}} Six thousand power outages occur in Nova Scotia.{{cite news|language=en|url=https://www.thestar.com/news/canada/2017/02/14/massive-storm-continues-to-freeze-maritimes-lead-to-weather-warnings.html|title=Massive storm continues to freeze Maritimes, lead to weather warnings|work=Toronto Star |date=February 14, 2017|access-date=2021-03-28}} A month later, a giant blizzard rode up the East Coast. At least 16 people were killed.{{cite news |title=Powerful nor'easter leaves 16 dead across the US Northeast |url=https://watchers.news/2017/03/16/winter-storm-stella-damage-united-states-march-2017/ |access-date=September 11, 2022 |publisher=The Watchers |date=March 16, 2017}} A record no-snow streak in Chicago was ended.{{cite web|url=https://weather.com/news/news/chicago-no-snow-january-february-2017|title=Winter Storm Stella Ends Chicago's Record-Long Stretch Without Snow Cover|work=weather.com|access-date=13 March 2017}} Another winter storm affected the Rocky Mountains in late April. Pueblo, Colorado saw 9200 power outages as a result,{{cite web|url=http://www.chieftain.com/weather/late-spring-snowstorm-causes-damage-electrical-outages/article_cb5d7ffe-cb0c-53bb-a5d0-176227e8554d.html|title=Late spring snowstorm causes damage, electrical outages|first=Zach|last=Hillstrom|work=chieftain.com|access-date=30 April 2017}} and portions of Interstate 70 in Kansas shut down.{{cite web|url=https://twitter.com/i/web/status/858652318262284288|title=KAKE News on Twitter|work=twitter.com|access-date=30 April 2017}} While mostly rain, a significant storm complex affected the Northeastern United States in late October. It caused over $100 million in damage,{{cite web|type=Report|url=http://thoughtleadership.aonbenfield.com/Documents/20171109-ab-analytics-if-october-global-recap.pdf |archive-url=https://web.archive.org/web/20171115003613/http://thoughtleadership.aonbenfield.com/Documents/20171109-ab-analytics-if-october-global-recap.pdf |archive-date=2017-11-15|title=Global Catastrophe Recap October 2017|work=Aon|url-status=live}} and 1.3 million power outages. Maine set a record number of power outages.{{Cite news|author=Jason Samenow |url=https://www.washingtonpost.com/news/capital-weather-gang/wp/2017/10/30/over-one-million-power-outages-in-the-northeast-after-blockbuster-fall-storm/ |title=More than 1 million power outages in the Northeast after blockbuster fall storm|date=2018-10-30|access-date=2021-10-04|newspaper=The Washington Post |archive-url=https://web.archive.org/web/20180715094042/https://www.washingtonpost.com/news/capital-weather-gang/wp/2017/10/30/over-one-million-power-outages-in-the-northeast-after-blockbuster-fall-storm/|archive-date=2018-07-15|url-status=live}} However, the mountains of West Virginia record up to {{convert|8.4|in|cm}} of snow.{{cite web | url=https://weather.com/forecast/regional/news/2017-10-30-northeast-storm-damaging-winds-flooding | title=Northeast Storm Undergoes Bombogenesis, Bringing 70+ MPH Gusts, Almost 350 Reports of Wind Damage, Flooding }} In early December, a winter storm results in 3 deaths and 400,000 power outages.{{cite news|title=Winter Storm Benji Targets Northeast After Leaving Nearly 400,000 Without Power In the South, 3 Dead|url=https://weather.com/news/news/2017-12-09-winter-storm-benji-south-mid-atlantic-northeast-impacts|last=Breslin|first=Sean|publisher=The Weather Channel|access-date=December 9, 2017}} The year ends with a record breaking cold wave. Flint, Michigan set a monthly record low.{{cite web | url=https://mashable.com/article/record-cold-us-canada-coldest-new-years-eve | title=Record cold in the U.S. And Canada has no end in sight — a running list of the records so far | website=Mashable | date=December 29, 2017 }}

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{{main|Wildfires in 2017}}

{{empty section|date=September 2022}}

{{main|Tornadoes of 2017}}

The year started with an intense tornado outbreak that became the 2nd largest and 2nd deadliest for January.{{cite news|publisher=The Weather Channel|date=January 27, 2017|access-date=January 28, 2017|title=Albany, Georgia, EF3 Tornado Traveled At Least 70 Miles; January 21–23, 2017 Outbreak Among Largest on Record in Winter|url=https://weather.com/storms/tornado/news/severe-weather-forecast-south-high-risk-tornadoes-january-2017}} The 81 tornadoes resulted in 20 deaths.{{cite news|author=Susan Eastman and Dan Lamothe|newspaper=The Washington Post|date=January 22, 2017|access-date=January 22, 2017|title=Nothing was left.' At least 12 people killed in Georgia amid string of winter tornadoes|url=https://www.washingtonpost.com/news/post-nation/wp/2017/01/22/tornadoes-kill-at-least-12-people-in-georgia-upping-weekend-weather-death-toll-to-16}} An EF3 tornado in Mississippi caused 4 deaths, 57 injuries and $9.46 million in damage.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Jackson, Mississippi|title=Mississippi Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=676495|publisher=National Centers for Environmental Information|year=2017|access-date=April 21, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Jackson, Mississippi|title=Mississippi Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=676496|publisher=National Centers for Environmental Information|year=2017|access-date=April 21, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Jackson, Mississippi|title=Mississippi Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=675634|publisher=National Centers for Environmental Information|year=2017|access-date=April 21, 2017}} The next day, an EF3 tornado in Georgia causes 11 deaths, 45 injuries and $2.5 million in damage.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673054|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673083|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673095|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}} Another EF3 tornado in Georgia caused 5 deaths, 40 injuries and $310 million in damage.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673010|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673013|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Tallahassee, Florida|title=Georgia Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673016|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Atlanta, Georgia|title=Georgia Event Report: EF1 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673736|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Atlanta, Georgia|title=Georgia Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=673739|publisher=National Centers for Environmental Information|year=2017|access-date=April 20, 2017}} Total damage was $1.3 billion in damages.{{cite web|title=Billion-Dollar Weather and Climate Disasters: Events|url=https://www.ncdc.noaa.gov/billions/events|website=NOAA|date=February 2022|access-date=February 21, 2022}} Two weeks later, an EF3 tornado strikes New Orleans, causing 33 injuries, including 5-6 serious.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in New Orleans, Louisiana|title=Multiple Tornadoes Confirmed on 02/07/2017|url=https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=PNSLIX&e=201702092300|publisher=Iowa Environmental Mesonet|date=February 9, 2017|access-date=February 10, 2017}} It caused at least $2.7 million in damage.{{cite news|author= Danielle Dreilinger|publisher=NOLA|date=February 14, 2017|access-date=February 15, 2017|title=Tornado damage to New Orleans schools estimated at $1.7 million|url=http://www.nola.com/education/index.ssf/2017/02/tornado_school_damage.html}}{{cite web|author=Paul Murphy|title=NASA facility in NO East vows to reopen after tornado|url=http://www.wwltv.com/news/local/orleans/nasa-facility-in-no-east-vows-to-reopen-after-tornado/406559597|publisher=WWV-TV|date=February 9, 2017|access-date=February 10, 2017}} It was part of a small outbreak of 15 tornadoes that day. Total economic losses were estimated at $175 million.[http://thoughtleadership.aon.com/Documents/20170308-ab-analytics-if-february-global-recap.pdf Global Catastrophe Recap - February 2017], Aon, March 2017 Another intense outbreak occurs in late February and early March. This included an EF4 tornado in Missouri and Illinois, causing 1 death, 12 injuries and $14.8 million in damage.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Missouri Event Report: EF4 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677516|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in St. Louis, Missouri|title=Illinois Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=679706|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Illinois Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677489|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Illinois Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677492|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}} Another EF3 in Illinois and Indiana causes 1 death, 2 injuries and $5.7 million in damage.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Illinois Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677523|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Indiana Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677881|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Paducah, Kentucky|title=Indiana Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=677883|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}} As another tornado that day killed two in Illinois, the total death toll was four.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Chicago, Illinois|title=Illinois Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=674614|publisher=National Centers for Environmental Information|year=2017|access-date=May 17, 2017}} Total damage is $1.3 billion. A week later, another tornado outbreak affected the Central United States. Nineteen people were injured,{{cite web |title=Tornado Outbreak of March 6th, 2017 |url=https://www.weather.gov/eax/6March2017Tornadoutbreak |website=NOAA |publisher=NWS Kansas City/Pleasant Hill, MO |access-date=September 11, 2022}}{{cite web |title=March 6th-7th QLCS Tornado Outbreak |url=https://www.weather.gov/lsx/03_06_2017 |website=NOAA |publisher=NWS Saint Louis, MO |access-date=September 11, 2022}} Damage totaled $2.5 billion. More tornadoes affect the US on April 2 and 3. The 59 tornadoes from the system cause 3 deaths.{{cite web|title=SPC Storm Reports for 04/02/17|url=http://www.spc.noaa.gov/climo/reports/170402_rpts.html|publisher=Storm Prediction Center|location=Norman, Oklahoma|date=April 3, 2017|access-date=April 3, 2017}}{{cite web|title=SPC Storm Reports for 04/03/17|url=http://www.spc.noaa.gov/climo/reports/170403_rpts.html|publisher=Storm Prediction Center|location=Norman, Oklahoma|date=April 3, 2017|access-date=April 3, 2017}} Less than a week later, two die due to a tornado in Paraguay.{{cite web |url=https://nazarene.org/article/paraguay-tornado-claims-life-young-church-member |title=Paraguay tornado claims life of young church member |date=April 13, 2017 |website=nazarene.org |publisher=Church of the Nazarene |access-date=May 10, 2021}} Another tornado outbreak affected the United States in late April and early May. The storm system resulted in $1.9 billion, and caused 20 total deaths. Five of those deaths are tornadic. Two fatal tornadoes strike Canton, Texas which cause a combined 4 fatalities, 49 injuries and $1.87 million.{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Fort Worth, Texas|title=Texas Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=683246|publisher=National Centers for Environmental Information|year=2017|access-date=November 7, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Fort Worth, Texas|title=Texas Event Report: EF4 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=683249|publisher=National Centers for Environmental Information|year=2017|access-date=November 7, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Fort Worth, Texas|title=Texas Event Report: EF3 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=683254|publisher=National Centers for Environmental Information|year=2017|access-date=November 7, 2017}}{{cite web|type=Report|agency=National Weather Service Weather Forecast Office in Fort Worth, Texas|title=Texas Event Report: EF2 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=683255|publisher=National Centers for Environmental Information|year=2017|access-date=November 7, 2017}} A tornado outbreak sequence in mid to late May results in 2 deaths, 39 injuries and $975 million.[http://thoughtleadership.aon.com/Documents/20170608-ab-analytics-if-may-global-recap.pdf Global Catastrophe Recap - May 2017], Aon, June 2017 Significant tornadic activity slowed down after this. On August 6, a small outbreak of tornadoes occurred near Tulsa, Oklahoma. The tornadoes cause 30 injuries, all due to an EF2 in Tulsa, and $50.24 million, of which $50 million is due to the EF2 in Tulsa.{{cite web |title=Tornado Summaries |url=https://www.ncdc.noaa.gov/stormevents/listevents.jsp?eventType=%28C%29+Tornado&beginDate_mm=08&beginDate_dd=06&beginDate_yyyy=2017&endDate_mm=08&endDate_dd=06&endDate_yyyy=2017&hailfilter=0.00&tornfilter=0&windfilter=000&sort=DT&submitbutton=Search&statefips=-999%2CALL |website=National Weather Service |publisher=National Centers for Environmental Information |access-date=23 July 2020}} Five days later, more tornadoes occur in China. The tornadoes cause 5 deaths and 58 injuries.{{Cite web|url=https://www.shundemos.com/zixunInfo.aspx$id=136158.htm|title=佛山顺德气象局|website=www.shundemos.com}}

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File:Maria 2017-09-19 2115Z.jpg nearing Puerto Rico]]

{{main|Tropical cyclones in 2017}}

The first tropical cyclone of the year was a tropical disturbance in the South Pacific, which formed on January 2 over the Solomon Islands. It was the first of 20 tropical cyclones in the South Pacific during the year,{{Cite web|url=http://australiasevereweather.com/cyclones/2017/summ2016-2017.htm|title = Southern Hemisphere 2016-2017 Tropical Cyclone Season Review}}{{Cite web|url=http://australiasevereweather.com/cyclones/2019/summ2018-2019.htm|title = Southern Hemisphere 2018-2019 Tropical Cyclone Season Review}} including Cyclone Donna, which became the strongest cyclone on record in the basin in the month of May, with 10 minute sustained winds of 205 km/h (125 mph).{{cite news|author=Matt Burrows|title=Cyclone Donna now category 5, breaks global record|url=http://www.newshub.co.nz/home/world/2017/05/cyclone-donna-now-category-5-breaks-global-record.html|archive-url=https://web.archive.org/web/20170511144216/http://www.newshub.co.nz/home/world/2017/05/cyclone-donna-now-category-5-breaks-global-record.html|url-status=dead|archive-date=May 11, 2017|newspaper=Newshub|date=8 May 2017|access-date=8 May 2017}} In the neighboring Australian basin, there were 28 tropical cyclones, most of them weak; however, Cyclone Ernie in April reached Category 5 intensity on the Australian tropical cyclone intensity scale, with 10 minute sustained winds of 220 km/h (140 mph).{{cite web| url=http://www.bom.gov.au/cyclone/history/pdf/Ernie_report.pdf | access-date=2023-10-31 | title=Severe Tropical Cyclone Ernie}} Cyclone Debbie struck Queensland in March, causing A$3.5 billion (US$2.67 billion) in damage and 14 deaths across Australia.{{cite web| url=https://www.suncorpgroup.com.au/uploads/190905-Economic-benefits-of-Suncorp-Insurance-REPORT-PDF-version.pdf | access-date=2023-10-31 | title=ECONOMIC RECOVERY AFTER DISASTER STRIKES}}{{Cite web|url=https://timswww.com.au/australian-severe-tropical-cyclone-debbie/|title = Cyclone Debbie - One of the Most Costly Cyclones in Queensland History|date = May 2021}} In November, Cyclone Cempaka killed 41 people in Indonesia from heavy rainfall.{{cite news|title=Cyclone Cempaka leaves at least 41 dead |url=https://www.thejakartapost.com/news/2017/12/06/cyclone-cempaka-leaves-at-least-41-dead.html |publisher=The Jakarta Post |date=6 December 2017 |access-date=14 January 2019}} The south-west Indian Ocean was quiet, with only six tropical cyclones during the year. Of these, Cyclone Dineo in February killed at least 258 people when it moved through Mozambique and Zimbabwe.{{cite web|url=http://thoughtleadership.aonbenfield.com/Documents/20180124-ab-if-annual-companion-volume.pdf|title=Companion Volume to Weather, Climate & Catastrophe Insight|date=24 January 2018|website=Aon Benfield|access-date=January 28, 2022|archive-date=March 2, 2018|archive-url=https://web.archive.org/web/20180302001946/http://thoughtleadership.aonbenfield.com/Documents/20180124-ab-if-annual-companion-volume.pdf|url-status=dead}}{{Cite web|url=http://reliefweb.int/report/zimbabwe/urgent-call-assistance-flood-victims|title = Urgent call for assistance to flood victims - Zimbabwe| date=March 7, 2017 }} Cyclone Enawo struck Madagascar in March, killing 78 people.{{cite news|url=https://www.news24.com/Africa/News/latest-madagascar-cyclone-deaths-rise-to-78-at-least-400-000-affected-20170315|title=LATEST: Madagascar cyclone deaths rise to 78, at least 400 000 affected|publisher=Agence France-Presse|newspaper=News24|date=15 March 2017|access-date=17 March 2017}} There was also a subtropical cyclone – Guará – which formed off Brazil in December.{{Cite web|url=http://australiasevereweather.com/cyclones/2018/trak1712.htm|title=Monthly Global Tropical Cyclone Tracks December 2017|website=australiasevereweather.com}}

In the northern hemisphere, activity began on January 7, when a tropical depression formed and later moved across the Philippines, killing 11 people.{{Cite web|url=http://thoughtleadership.aonbenfield.com/Documents/20170208-ab-analytics-if-january-global-recap.pdf|title=Global Catastrophe Recap January 2017|website=thoughtleadership.aonbenfield.com|publisher=Aon Benfield|access-date=February 8, 2017|archive-date=February 19, 2017|archive-url=https://web.archive.org/web/20170219091856/http://thoughtleadership.aonbenfield.com/Documents/20170208-ab-analytics-if-january-global-recap.pdf|url-status=dead}} It was the first of 41 tropical cyclones in the western Pacific Ocean in the year.{{Cite web|url=http://australiasevereweather.com/cyclones/2018/summ2017.htm|title=Northern Hemisphere 2017 Tropical Cyclone Season Review|website=australiasevereweather.com}} The final two storms of the season – Kai-tak and Tembin – moved through the Philippines in December, together causing 406 deaths. The year's costliest typhoon was Hato, which left more than US$4.34 billion in damage when it moved ashore southern China near Hong Kong.{{Cite web|url=http://www.typhooncommittee.org/12IWS/docs/Members/China20171026_final.pdf

|title=Member Report: China|website=CMA|publisher=China Meterelogical Agency|access-date=26 October 2017}} In the north Indian Ocean, there were 10 tropical cyclones, which included several deadly storms. Cyclone Ockhi in December killed more than 137 people in Sri Lanka and southern India.{{cite web| url=https://rsmcnewdelhi.imd.gov.in/uploads/report/26/26_83ec45_ockhi%20pre.pdf | title=Very Severe Cyclonic Storm,'OCKHI' over the Bay of Bengal (29 Nov.-05 Dec. 2017): A Report | access-date=2023-10-31}} There were 20 tropical cyclones in the eastern Pacific Ocean, including Tropical Storm Lidia, which killed 20 people when it struck western Mexico.{{cite web|title=Global Catastrophe Recap – September 2017|url=http://thoughtleadership.aonbenfield.com/Documents/20171005-ab-analytics-if-september-global-recap.pdf|publisher=Aon Benfield Analytics|access-date=3 January 2018|archive-date=October 7, 2017|archive-url=https://web.archive.org/web/20171007051853/http://thoughtleadership.aonbenfield.com/Documents/20171005-ab-analytics-if-september-global-recap.pdf|url-status=dead}}

In the Atlantic Ocean, activity began in April and lasted until November, with 18 tropical cyclones, including several deadly and costly storms. In August, Hurricane Harvey struck southeastern Texas and subsequently stalled over the state, dropping 60.58 in (1,539 mm) of rainfall; this was the highest amount of precipitation associated with a tropical cyclone in the United States. The rains caused widespread flooding along the storm's path, particularly near Houston, resulting in more than 100 fatalities and US$125 billion in damage, tying Harvey with Hurricane Katrina in 2005 as the costliest United States hurricane.{{cite web|type=Report|author1=Eric S. Blake|author2=David A. Zelinsky|publisher=National Hurricane Center|location=Miami, Florida|date=January 23, 2018|access-date=January 29, 2018|title=Hurricane Harvey (AL092017)|series=Tropical Cyclone Report|url=https://www.nhc.noaa.gov/data/tcr/AL092017_Harvey.pdf|archive-url=https://web.archive.org/web/20180126083538/https://www.nhc.noaa.gov/data/tcr/AL092017_Harvey.pdf|archive-date=January 26, 2018|url-status=live}} In September, Hurricane Irma struck the northern Lesser Antilles and later Cuba as a Category 5 hurricane, and later Florida at a lower intensity, causing more than US$50 billion in damage and 139 deaths.{{cite web|type=Report|author=John P. Cangialosi|author2=Andrew S. Latto|author3=Robbie J. Berg|publisher=National Hurricane Center|date=March 9, 2018|access-date=March 12, 2018|title=Hurricane Irma (AL112017)|series=Tropical Cyclone Report|url=https://www.nhc.noaa.gov/data/tcr/AL112017_Irma.pdf|archive-url=https://web.archive.org/web/20180831040906/https://www.nhc.noaa.gov/data/tcr/AL112017_Irma.pdf|archive-date=August 31, 2018|url-status=live}} Two weeks after Irma, Hurricane Maria struck Dominica as a Category 5 hurricane and later Puerto Rico as a Category 4 hurricane, causing US$90 billion in damage and more than 3,000 deaths, mostly in Puerto Rico.{{cite web|type=Report |url=https://www.nhc.noaa.gov/data/tcr/AL152017_Maria.pdf |title=Tropical Cyclone Report: Hurricane Maria |author=Richard J. Pasch |author2=Andrew B. Penny |author3=Robbie Berg |date=April 5, 2018 |publisher=National Hurricane Center |location=Miami, Florida |access-date=April 10, 2018 |archive-url=https://web.archive.org/web/20180420024334/https://www.nhc.noaa.gov/data/tcr/AL152017_Maria.pdf |archive-date=April 20, 2018 |url-status=live }}{{cite web| url=https://www.ncdc.noaa.gov/billions/dcmi.pdf | access-date=2023-10-31 | title=Costliest U.S. Tropical Cyclones}}{{cite web |last1=Baldwin |first1=Sarah Lynch |last2=Begnaud |first2=David |title=Hurricane Maria caused an estimated 2,975 deaths in Puerto Rico, new study finds |url=https://www.cbsnews.com/news/hurricane-maria-death-toll-puerto-rico-2975-killed-by-storm-study-finds/ |work=CBS News |access-date=28 August 2018}} Also during the season, Hurricane Nate produced damaging floods across Central America, killing 45 people.{{cite web|type=Report|url=https://www.nhc.noaa.gov/data/tcr/AL162017_Nate.pdf|title=Tropical Cyclone Report: Hurricane Nate|author=John L. Beven II and Robbie Berg|date=April 5, 2018|publisher=National Hurricane Center|location=Miami, Florida|access-date=April 10, 2018|archive-url=https://web.archive.org/web/20180410201610/https://www.nhc.noaa.gov/data/tcr/AL162017_Nate.pdf|archive-date=April 10, 2018|url-status=live}}

In addition to the above cyclones, there was a Mediterranean tropical-like cyclone called Cyclone Numa, which killed 22 people when it struck Greece.{{cite web|title=Global Catastrophe Recap - November 2017|url=http://thoughtleadership.aonbenfield.com/Documents/20171207-ab-analytics-if-november-global-recap.pdf|work=Aon Benfield|date=7 December 2017|access-date=26 September 2018|page=5|archive-date=December 12, 2017|archive-url=https://web.archive.org/web/20171212045306/http://thoughtleadership.aonbenfield.com/Documents/20171207-ab-analytics-if-november-global-recap.pdf|url-status=dead}}

This is a timeline of weather events during 2017. Please note that entries might cross between months, however, all entries are listed by the month they started.

• January 2 – A tornado outbreak, across the Gulf Coast of the United States, killed four people (non-tornadic) and caused over $250 million (2017 USD) in damage from 36 tornadoes.{{cite web |title= SPC Storm Reports for 01/02/17 |url= http://www.spc.noaa.gov/climo/reports/170102_rpts.html |publisher= Storm Prediction Center |date= January 2, 2017 |access-date= January 2, 2017}}{{cite web|type=Report |publisher= Aon Benfield |date= February 8, 2017 |access-date= February 18, 2017 |title= Global Catastrophe Recap: January 2017 |url= http://thoughtleadership.aonbenfield.com/Documents/20170208-ab-analytics-if-january-global-recap.pdf }}
• January 10–17 – An ice storm and tornado outbreak across North America killed nine people, injured two others (tornadic), and caused multiple states to declare a state of emergency. The storm produced 11 tornadoes in Texas.
• January 21–24 – A tornado outbreak, windstorm, and nor'easter, across the Southeastern and Northeastern United States and Quebec, killed 22 people (20 tornadic and 2 non-tornadic), injured 204 others, and caused $1.3 billion (2017 USD) in damage from 81 tornadoes, becoming the second-largest January tornado outbreak and the third-largest winter tornado outbreak since 1950 as well as the largest outbreak on record in Georgia. The outbreak was also the second-deadliest outbreak in January since 1950.
• January 21 – An EF3 tornado in Mississippi killed four people, injured 57 others, and caused $9 million (2017 USD) in damage, while tearing through William Carey University and Hattiesburg, Mississippi on its 31.3 mi (50.4 km) path.
• January 22 – An EF3 tornado in Georgia killed 11 people and injured 45 others, while passing south of Adel, Georgia, along a 24.88 mi (40.04 km) path.
• January 22 – An EF3 rain-wrapped wedge (2,200 yards wide) tornado in Georgia killed five people, injured 40 others, and caused $300 million (2017 USD) in damage along its 70.69 mi (113.76 km) path. The National Weather Service issued tornado emergency when it passed through Albany, Georgia.

• February 7 – A tornado outbreak, across the Southeastern United States, killed one person, injured 40 others, and caused over $175 million (2017 USD) in damage from 15 tornadoes.
• February 7 – An EF3 tornado in New Orleans, Louisiana injured 33 people and caused $2.7 million (2017 USD) in damage along its 10.09 mi (16.24 km) path.
• February 23-24 - Record heat surges into the Northeastern United States. On February 24, New York City sees a February record warm low of {{convert|58|F|C}}.{{cite tweet|number=835517070599208960|user=bhensonweather|title=Friday's low of 58F was warmest low ever observed in Feb at @CentralParkNYC, beating 55F (2/23/85). Records there go back to 1872.|date=February 25, 2017}} Boston saw a record monthly high of {{convert|73|F|C}}.[https://www.wbur.org/news/2017/02/24/record-warm-february-boston It Just Hit 73 Degrees In Boston. That's The Warmest Ever For February], WBUR, February 24, 2017 Albany, which hit {{convert|74|F|C}}, saw its warmest temperature in meteorological winter on record.[https://mashable.com/article/february-heat-records Here’s why it's so frickin’ hot right now], Mashable, February 24, 2017 The day before, Syracuse tied a monthly record high, at {{convert|69|F|C}}.[https://www.syracuse.com/weather/2017/02/today_could_be_the_warmest_february_day_on_record_in_syracuse.html Today is the second-warmest February day on record in Syracuse], Syracuse Weather, February 23, 2017
• February 25 – Five tornadoes touch down in Pennsylvania, Maryland, and Massachusetts, including an EF1, which became the first Massachusetts tornado on record during the month of February.{{cite web|agency=National Weather Service Weather Forecast Office in Taunton, Massachusetts|title=Tornado Confirmed in Goshen MA in Hampshire County and Conway MA in Franklin County|url=https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=PNSBOX&e=201702270328|publisher=Iowa Environmental Mesonet|date=February 26, 2017|access-date=February 26, 2017}}
• February 28–March 1 – A tornado outbreak, across the Central United States, Ohio Valley, Eastern United States and Southern United States, killed four people, injured 68 people (38 tornadic and 30 non-tornadic), and caused $1.3 billion (2017 USD) in damage.

• March 6–7 – A tornado outbreak across the Central United States injured 19 people from 63 tornadoes.
• March 9–18 – A blizzard across North America, unofficially named Winter Storm Stella, Blizzard Eugene, and Blizzard of 2017, killed 16-19 people and caused over 100,000 power outages. The storm system also spawned three tornadoes in Florida and wind gusts of {{convert|138|mph|km/h|abbr=on}} were reported on Mount Washington, New Hampshire.

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• May 15-20 - A tornado outbreak sequence killed 2 people and injured 38 more from 134 tornadoes.
• May 19 - Both LaGuardia Airport and Burlington, Vermont tie record high temperatures for the month of May, at {{convert|97|F|C}} and {{convert|93|F|C}} respectively.{{cite news |title=So weird: New England has nation's hottest weather, with Boston hitting 95 |url=https://www.washingtonpost.com/news/capital-weather-gang/wp/2017/05/18/so-weird-new-england-has-nations-hottest-weather-boston-hits-95-degrees/ |access-date=January 30, 2023 |date=May 19, 2017}}

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• July 15 – Flash floods near Payson, Arizona killed ten people and injured four others.{{cite web |title=Nine dead, one missing after Ariz. flash flood |url=https://www.santafenewmexican.com/news/local_news/nine-dead-one-missing-after-ariz-flash-flood/article_5ebc909a-c387-5885-b61d-698eb90292a8.html |website=santafenewmexican.com |publisher=Sally Ho and Anita Snow |access-date=18 June 2021}}

• August 6 – Four tornadoes around Tulsa, Oklahoma injured 30 people and caused $50.24 million (2017 USD) in damage.
• August 17 – September 2 – Hurricane Harvey kills 103 people due to extreme flooding in Texas. It also kills one in Guyana, two in Arkansas, one in Tennessee and one in Kentucky. Overall it causes 108 deaths and $125 billion in damages, tying it with Hurricane Katrina as the costliest hurricane.
• August 30 - September 12 - Hurricane Irma strikes the Caribbean Sea and Southeastern United States, causing 134 deaths and over $77.8 billion.

• September 16-30 - Hurricane Maria makes landfall in the Windward Islands and Puerto Rico, killing 3,059 and causing $91.6 billion in damages.
• September 25-27 - Syracuse, New York experienced its latest in-year heat wave, with temperatures hitting {{convert|90|F|C}} on September 25 and 27 and {{convert|91|F|C}} on September 26.{{cite news |title=Syracuse has an official heat wave -- and it's the latest one ever recorded |url=https://www.syracuse.com/weather/2017/09/syracuse_has_an_official_heat_wave_--_and_its_the_latest_one_ever_recorded.html |access-date=January 30, 2023 |publisher=Syracuse.com |date=September 27, 2017}}

• October 28-29 - Tropical Storm Philippe caused 5 deaths and $100 million in damage across Central America and Florida.
• October 28-31 - A storm complex causes $100 million and 1.3 million power outages.

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• December 23, 2017 – January 19, 2018 – A cold wave caused damaging low temperatures across eastern North America. The cold wave also caused Tallahassee, Florida to receive trace amounts of frozen precipitation for the first time in more than 30 years.

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{{Weather by year

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Category:Weather by year

Category:2017 meteorology