The name Ilsa has been used for one

tropical cyclone A tropical cyclone is a rapidly rotating storm system with a low-pressure area, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depending on its locat ...

the Atlantic Ocean The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for se ...

, three in the Eastern Pacific Ocean, and three in the Australian region. In the Atlantic: * Hurricane Ilsa (1958) – a Category 2 hurricane that engaged in a

Fujiwhara interaction The Fujiwhara effect, sometimes referred to as the Fujiwara effect, Fujiwara interaction or binary interaction, is a phenomenon that occurs when two nearby cyclonic vortices move around each other and close the distance between the circulations o ...

with

Hurricane Helene Hurricane Helene ( ) was a deadly and devastating tropical cyclone that caused widespread catastrophic damage and numerous fatalities across the Southeastern United States in late September 2024. It was the strongest hurricane on record to ...

and caused beach erosion in

Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...

In the Eastern Pacific: * Tropical Storm Ilsa (1967) – did not affect land * Hurricane Ilsa (1971) – a Category 3 hurricane that did not affect land * Hurricane Ilsa (1975) – a Category 2 hurricane that contributed to the formation of the

1975 Pacific Northwest hurricane The 1975 Pacific hurricane season officially started May 15, 1975, in the eastern Pacific, and June 1, 1975, in the central Pacific, and lasted until November 30, 1975. These dates conventionally delimit the period of each year when most tropica ...

In the Australian region: * Cyclone Ilsa (1999) – a Category 2 tropical cyclone that made landfall in

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

* Cyclone Ilsa (2009) – a Category 4 severe tropical cyclone * Cyclone Ilsa (2023) – a Category 5 severe tropical cyclone that caused a record-breaking windspeed measurement in

Bedout Island Bedout Island is a small Western Australian island on the Pilbara coast. It lies offshore from Larrey Point and the mouth of the De Grey River, and north-east of Port Hedland. It was named by Baudin expedition to Australia, Baudin during his ...

See also