1984 tropical cyclone seasons worldwide
In 1984, 99 storms reached tropical-storm strength across the six ocean basins. 49 of them reached hurricane or typhoon strength (64 kt) and 21 became major storms (96 kt or more). The strongest was Super Typhoon Vanessa in the West Pacific, at 180 mph. The Southern Hemisphere figures are the 1983–84 season, which IBTrACS files under 1984.
1984 at a glance
- Storms at tropical-storm strength (34 kt+): 99, from 117 systems tracked.
- Hurricanes and typhoons (64 kt+): 49.
- Major storms (96 kt+): 21, 1 of them at Category 5 strength.
- Accumulated cyclone energy, all basins: 794, 99% of the 800 that the six basins produce in an average year (1991–2020).
- Strongest storm worldwide: Super Typhoon Vanessa, West Pacific, 180 mph (155 kt), 880 mb.
- Most active basin against its average: East Pacific, with 144% of its average accumulated cyclone energy.
- Least active against its average: Central Pacific, at 45%.
Each basin in 1984
Counts against each basin’s 1991–2020 average. Open a basin for its 1984 track map, every storm and its landfalls.
Atlantic hurricane season
1984 season
13 named (average 14.4), 5 hurricanes (average 7.2). Strongest: Hurricane Diana, 130 mph.
East Pacific hurricane season
1984 season
19 named (average 15.6), 12 hurricanes (average 8.4). Strongest: Hurricane Douglas, 145 mph.
Central Pacific hurricane season
1984 season
2 named (average 1.6), 1 hurricane (average 0.8). Strongest: Hurricane Keli, 115 mph.
West Pacific typhoon season
1984 season
27 named (average 25.5), 16 typhoons (average 15.8). Strongest: Super Typhoon Vanessa, 180 mph.
North Indian cyclone season
1984 season
4 named (average 6.3), 2 at hurricane strength (average 2.0). Strongest: Cyclone 3B, 100 mph.
Southern Hemisphere cyclone season
1983–84 season
34 named (average 26.7), 13 at hurricane strength (average 13.8). Strongest: Cyclone Andry, 150 mph.
Strongest storms of 1984
| Storm | Basin | Peak wind | Min pressure | Dates |
|---|---|---|---|---|
| Vanessa | West Pacific | C5 180 mph | 880 mb | – |
| Bill | West Pacific | C4 150 mph | 910 mb | – |
| Andry | Southern Hemisphere | C4 150 mph | 927 mb | – |
| Dinah | West Pacific | C4 145 mph | 915 mb | – |
| Kathy | Southern Hemisphere | C4 145 mph | 920 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.