Three storms have been named Ilsa since 1999: three in the Southern Hemisphere (1999, 2009 and 2023). The strongest, in 2023, peaked as a Category 4 cyclone with winds of 155 mph (250 km/h).
Ilsa formed in the Southern Hemisphere in April 2023 and peaked as a Category 4 cyclone with maximum sustained winds of 155 mph (250 km/h) and a minimum pressure of 920 mb. It made landfall near Port Hedland, Australia. The system was tracked for 10 days.
Cyclone Ilsa (2023): track and historyIlsa formed in the Southern Hemisphere in March 2009 and peaked as a Category 3 cyclone with maximum sustained winds of 115 mph (185 km/h) and a minimum pressure of 948 mb. It did not make landfall. The system was tracked for 12 days.
Cyclone Ilsa (2009): track and historyIlsa formed in the Southern Hemisphere in December 1999 and peaked as a tropical storm with maximum sustained winds of 70 mph (110 km/h) and a minimum pressure of 980 mb. The system was tracked for 9 days.
Tropical Storm Ilsa (1999): track and history| Storm | Landfall near | Date (UTC) | Wind |
|---|---|---|---|
| Ilsa 2023 | Port Hedland, Australia | 2023-04-13 16:00 | 130 mph / 205 km/h |
| Ilsa 1999 | 19.9°S 120.8°E | 1999-12-17 06:00 | 40 mph / 65 km/h |
The most recent was Cyclone Ilsa in 2023, in the Southern Hemisphere. It formed on April 5, peaked at 155 mph (250 km/h) and lasted 10 days. It made landfall near Port Hedland, Australia. Before that, the name was used in 2009 and 1999.
Cyclone Ilsa in 2023 was the strongest, peaking as a Category 4 cyclone with winds of 155 mph (250 km/h) and a minimum pressure of 920 mb. It formed in the Southern Hemisphere in April and made landfall near Port Hedland, Australia. The weakest of the three, in 1999, peaked at 70 mph (110 km/h).