2017 tropical cyclone seasons worldwide
In 2017, 92 storms reached tropical-storm strength across the six ocean basins. 43 of them reached hurricane or typhoon strength (64 kt) and 19 became major storms (96 kt or more). The strongest was Hurricane Irma in the Atlantic, at 180 mph. The Southern Hemisphere figures are the 2016–17 season, which IBTrACS files under 2017.
2017 at a glance
- Storms at tropical-storm strength (34 kt+): 92, from 107 systems tracked.
- Hurricanes and typhoons (64 kt+): 43.
- Major storms (96 kt+): 19, 3 of them at Category 5 strength.
- Accumulated cyclone energy, all basins: 642, 80% of the 800 that the six basins produce in an average year (1991–2020).
- Strongest storm worldwide: Hurricane Irma, Atlantic, 180 mph (155 kt), 914 mb.
- Most active basin against its average: Atlantic, with 183% of its average accumulated cyclone energy.
- Least active against its average: Central Pacific, at 0%.
Each basin in 2017
Counts against each basin’s 1991–2020 average. Open a basin for its 2017 track map, every storm and its landfalls.
Atlantic hurricane season
2017 season
18 named (average 14.4), 10 hurricanes (average 7.2). Strongest: Hurricane Irma, 180 mph.
East Pacific hurricane season
2017 season
18 named (average 15.6), 9 hurricanes (average 8.4). Strongest: Hurricane Fernanda, 145 mph.
Central Pacific hurricane season
2017 season
No storms recorded.
West Pacific typhoon season
2017 season
26 named (average 25.5), 12 typhoons (average 15.8). Strongest: Super Typhoon Noru, 155 mph.
North Indian cyclone season
2017 season
6 named (average 6.3), 2 at hurricane strength (average 2.0). Strongest: Cyclone Ockhi, 115 mph.
Southern Hemisphere cyclone season
2016–17 season
24 named (average 26.7), 10 at hurricane strength (average 13.8). Strongest: Cyclone Ernie, 160 mph.
Strongest storms of 2017
| Storm | Basin | Peak wind | Min pressure | Dates |
|---|---|---|---|---|
| Irma | Atlantic | C5 180 mph | 914 mb | – |
| Maria | Atlantic | C5 175 mph | 908 mb | – |
| Ernie | Southern Hemisphere | C5 160 mph | 918 mb | – |
| Noru | West Pacific | C4 155 mph | 922 mb | – |
| Lan | West Pacific | C4 155 mph | 922 mb | – |
Peak winds are 1-minute sustained winds from the NHC and JTWC best tracks, so storms in different basins compare on the same scale.