Storm history › South Indian Ocean › 1977 season
Cyclone Irene (1977)
Irene was a Category 2 cyclone of the 1977 South Indian Ocean season. It was tracked from January 6, 1977 to January 13, 1977, about 7 days, and covered 1,219 miles.
At its peak it had winds of 100 mph (155 km/h) and a lowest pressure of 970 mb.
- Peak wind
- 100 mph
- Lowest pressure
- 970 mb
- Strongest
- Category 2 cyclone
- Duration
- 7 days
- Track length
- 1,219 mi
- Energy (ACE)
- 11.7
DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5
How it compares
- Peak winds: 276th highest of 951 South Indian Ocean storms on record, tied with Cyclone Gamane (2024), Cyclone Dingani (2023), Cyclone Claudia (2020) and 16 more.
- Lowest pressure: 390th lowest of 1,029 South Indian Ocean storms with a recorded pressure, tied with Cyclone Riley (2019), Cyclone Carlos (2017), Cyclone Adjali (2015) and 18 more.
- Energy: 31% of the 1977 South Indian Ocean season's ACE.