Просмотр кода страницы Английская Википедия:Cyclone Ilsa

{{Английская Википедия/Панель перехода}}
{{Short description|Category 5 Australian region cyclone in 2023}}
{{For|other tropical cyclones of the same name|Tropical Storm Ilsa}}
{{distinguish|Tropical Storm Isa|Hurricane Elsa}}
{{Use dmy dates|date=December 2023}}
{{Infobox weather event
| name = Severe Tropical Cyclone Ilsa
| image = Ilsa 2023-04-13 0545Z.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 = 919
}}{{Infobox weather event/Effects
| year = 2023
| currency = AUD
| damages = 4000000
| deaths = 8
| missing = 
| affected = [[Maluku (province)|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 [[Tropical cyclone naming|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&nbsp;5 hurricane on the [[Saffir–Simpson hurricane wind scale]]. Additionally, record-breaking [[Maximum sustained wind|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 around [[Australian dollar|A$]]4&nbsp;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&nbsp;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&nbsp;UTC 13&nbsp;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 (meteorology)|ridge]] above north-eastern Australia, as [[atmospheric convection|convection]] persisted near the system's circulation.<ref name="TCR">{{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}}</ref> 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 (meteorology)|outflow]] and warm [[sea surface temperature]]s (SST) of {{convert|29|-|30|C|F}} subduing high vertical [[wind shear]].<ref>{{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}}</ref> Convection continued to strengthen west of the exposed low-level circulation centre (LLCC) as it scattered under a strong [[temperature gradient]].<ref name="TCR"/> During the following day, the JTWC initiated advisories on the system and classified it as ''Tropical Cyclone 18S''.<ref>{{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]</ref>
[[File:Ilsa 2023-04-12 0510Z.jpg|thumb|217x217px|Cyclone Ilsa continuing to intensify off the coast of Western Australia on 12 April]]
More consolidation took place, with spiral [[rainband]]s present in all quadrants of the storm wrapping around the LLCC obscured by a cold [[central dense overcast|dense overcast]] (CDO).<ref>{{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}}</ref> Easterly wind shear decreased as a result of the intense convective mass causing upper-level winds around it.<ref>{{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}}</ref> Over the subsequent days, the low steadily drifted to the southwest, but due to a surge of unfavourable wind shear, intensification was delayed.<ref name="TCR"/><ref>{{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]</ref> 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&nbsp;1 tropical cyclone and named it ''Ilsa''.<ref name="TCR"/> The expanding CDO completely obscured the circulation as westerly dry air attempted to enter the system from the north. Consequently, Ilsa became a Category&nbsp;1-equivalent tropical cyclone on the [[Saffir–Simpson scale]] (SSHWS).<ref>{{cite JTWC|designation=18S|type=prog|no=12|url=https://www.metoc.navy.mil/jtwc/products/sh1823prog.txt|archive-url=https://wiki.chlod.net/jtwc/prog/2023-04-11-1500-sh1823prog.txt|date=11 April 2023|archive-date=11 April 2023|name=Ilsa|category=tc}}</ref> A burst of convection occurred near Ilsa's center, and the BoM reported that it briefly strengthened into a Category&nbsp;2 cyclone.<ref>{{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 }}</ref> On the same day, Ilsa rapidly intensified into a Category&nbsp;3 severe tropical cyclone within a favourable environment of low shear and warm SST.<ref>{{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 }}</ref> 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}}.<ref>{{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}}</ref> A mid-level trough passed south of the system, eroding the steering ridge, and by 12 April, Ilsa changed course to be more southerly.<ref name="TCR"/>

Ilsa displayed an [[eye (cyclone)|eye]] feature in [[microwave imaging]], with vortical [[hot tower]]s indicating eye development.<ref>{{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}}</ref> The eye in the symmetric system later became visible on satellite imagery as rainbands tightened after intensifying to a Category&nbsp;3-equivalent tropical cyclone.<ref>{{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]</ref> 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&nbsp;4 severe tropical cyclone.<ref>{{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}}</ref> Owing to the substatial radial outflow and very warm SST, despite moderate wind shear, Ilsa intensified into a Category&nbsp;4-equivalent tropical cyclone on the SSHWS.<ref>{{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}}</ref> Later that day, Ilsa strengthened further to its peak intensity as a Category&nbsp;5-equivalent tropical cyclone with 1-minute sustained winds of {{convert|140|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}}.<ref>{{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 }}</ref> An automated weather station on [[Rowley Shoals]] recorded wind gusts up to {{convert|127|kn|km/h mph|abbr=on|order=out|sortable=on}}.<ref>{{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 }}</ref> Later that same day, Ilsa had become a Category&nbsp;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}}.<ref name="TCR"/>

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}}.<ref>{{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 }}</ref> 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.<ref>{{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}}</ref> While over [[Western Australia]], Ilsa weakened to a Category&nbsp;4 severe tropical cyclone with {{convert|95|kn|km/h mph|abbr=on|order=out|round=5|sortable=on}} winds.<ref>{{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 }}</ref> The storm continued to weaken with a deteriorating cloud signature.<ref>{{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 }}</ref> 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]].<ref name="TCR"/>
{{clear}}

== Preparations and impact ==
[[File:Ilsa 2023-04-13 1200-1420Z.gif|thumb|253x253px|Cyclone Ilsa making landfall east of Port Hedland, WA on 13 April.]]
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.<ref name=":Gale-force">{{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 }}</ref> Squally thunderstorms are also anticipated in far northern [[Kimberley (Western Australia)|Kimberley]].<ref name=":Gale-force" /> 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.<ref>{{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}}</ref><ref>{{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 }}</ref> In anticipation of Ilsa, the BoM issued a warning for [[Western Australia]]’s Kimberley and [[Pilbara]] regions.<ref>{{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}}</ref> 

Additional emergency workers, aircraft and essential supplies have also been sent to the region.<ref>{{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 }}</ref> 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.<ref>{{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}}</ref> At least 700 residents were being evacuated to cyclone shelters prior to the storm.<ref>{{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 }}</ref> [[Town of Port Hedland|Port Hedland]] mayor Peter Carter said damaging winds could turn flying debris into "missiles in the air".<ref>{{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}}</ref> 

Western Australia's Emergency Department on 15 April assessed damage from a tropical cyclone that hit the northwest of the state.<ref>{{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 }}</ref> At least eight personnel have been sent to the Great Northern Highway fires near Pippingarra.<ref>{{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 }}</ref> Pardoo Roadhouse, located northeast of [[Port Hedland]] and near the landfall point, sustained major damage valued at [[Australian dollar|A$]]4&nbsp;million.<ref>{{Cite web |title=Roadhouse at centre of Cyclone Ilsa estimates damage at more than $4 million |url=https://www.theage.com.au/national/western-australia/roadhouse-at-centre-of-cyclone-ilsa-estimates-damage-at-more-than-4-million-20230414-p5d0iq.html |access-date=13 April 2023 |website=The Age |language=en |archive-date=14 April 2023 |archive-url=https://web.archive.org/web/20230414034415/https://www.theage.com.au/national/western-australia/roadhouse-at-centre-of-cyclone-ilsa-estimates-damage-at-more-than-4-million-20230414-p5d0iq.html |url-status=live }}</ref> Five accommodation sheds were entirely blown away by the storm at the Pardoo Roadhouse, and emergency officials have been unable to locate them.<ref>{{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}}</ref> Apart from Pardoo, acting emergency services minister Sue Ellery called the storm damage "fairly minimal."<ref>{{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 }}</ref> 

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 [[Rowley Shoals|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.<ref>{{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}}</ref>

==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}}
*[[Tropical cyclones in 2023]]
*[[Weather of 2023]]
*[[Cyclone Ilona]] (1988)
*[[Cyclone Orson]] (1989) – a powerful tropical cyclone that had a similar path and intensity.
*[[Cyclone John]] (1999)
*[[Cyclone George]] (2007) 
*[[Cyclone Laurence]] (2009) 
*Cyclones [[Cyclone Heidi|Heidi]] and [[Cyclone Lua|Lua]] (2012) – two severe tropical cyclones which both made landfall around [[Pardoo Station|Pardoo]] within the span of two months. 
*[[Cyclone Kelvin]] (2018) – the previous severe tropical cyclone to make landfall between Broome and Port Hedland prior to Ilsa.
{{clear}}

== Notes ==
{{reflist|group=nb}}

==References==
{{reflist}}

==External links==
{{commons category|Cyclone Ilsa (2023)}}
* [http://www.bom.gov.au/cyclone/ Australian Bureau of Meteorology]
* [https://www.metoc.navy.mil/jtwc/jtwc.html Joint Typhoon Warning Center]
* [http://meteo.bmkg.go.id/siklon Tropical Cyclone Warning Center Jakarta] {{in lang|id}}
* [http://www.pngmet.gov.pg Papua New Guinea National Weather Service]

{{2022–23 Australian region cyclone season buttons}}
{{Category 5 Australian region tropical cyclones}}
{{Retired Australian region cyclones}}

{{DEFAULTSORT:Ilsa}}
[[Category:2023 meteorology]]
[[Category:2022–23 Australian region cyclone season]]
[[Category:April 2023 events in Australia]]
[[Category:2023 disasters in Australia]]
[[Category:Tropical cyclones in 2023]]
[[Category:Tropical cyclones in Western Australia]]
[[Category:Category 5 Australian region cyclones]]
[[Category:2020s in Western Australia]]
{{Навигационная таблица/Портал/Английская Википедия}}
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[[Категория:Википедия]]
[[Категория:Статья из Википедии]]
[[Категория:Статья из Английской Википедии]]