All seasons · Atlantic
1984 Atlantic hurricane season
The 1984 Atlantic season has 20 storms in the best-track record; 13 reached tropical-storm strength and 5 became hurricanes, 1 of them major. Its accumulated cyclone energy of 70.9 is the 79th-lowest of the 175 seasons in the Atlantic record since 1851. Diana was the strongest, peaking at 130 mph as a Category 4 hurricane. One of its storms has a landfall record, in North Carolina. The first record is dated June 11, the last December 24.
Storm by storm
More storms formed in September than in any other month of 1984: 7 of 20. Lili lasted longest, 12.0 days as a tropical or subtropical system. Josephine contributed the most energy, 28% of the season's ACE. Diana reached North Carolina as a Category 1 hurricane on September 13.
| Storm | Dates | Peak | Strength | Lowest | Landfalls |
|---|---|---|---|---|---|
| Storm 1 of 1984 | Jun 11–14 | 35 mph | Depression | – | – |
| Storm 2 of 1984 | Jun 18–20 | 35 mph | Depression | – | – |
| Storm 3 of 1984 | Jul 24–26 | 35 mph | Depression | – | – |
| Storm 4 of 1984 | Aug 6–8 | 35 mph | Depression | – | – |
| Storm 5 of 1984 | Aug 18–21 | 60 mph | Tropical storm | 1000 mb | – |
| Arthur | Aug 28 – Sep 5 | 50 mph | Tropical storm | 1004 mb | – |
| Bertha | Aug 30 – Sep 4 | 40 mph | Tropical storm | 1007 mb | – |
| Cesar | Aug 31 – Sep 2 | 60 mph | Tropical storm | 994 mb | – |
| Storm 9 of 1984 | Sep 6–8 | 35 mph | Depression | – | – |
| Diana | Sep 8–16 | 130 mph | Category 4 | 949 mb | North Carolina |
| Edouard | Sep 14–15 | 65 mph | Tropical storm | 998 mb | – |
| Fran | Sep 15–20 | 65 mph | Tropical storm | 994 mb | – |
| Gustav | Sep 16–19 | 50 mph | Tropical storm | 1006 mb | – |
| Hortense | Sep 23 – Oct 2 | 75 mph | Category 1 | 993 mb | – |
| Isidore | Sep 25 – Oct 1 | 60 mph | Tropical storm | 999 mb | – |
| Josephine | Oct 7–18 | 105 mph | Category 2 | 965 mb | – |
| Storm 17 of 1984 | Oct 25–28 | 35 mph | Depression | – | – |
| Klaus | Nov 5–13 | 90 mph | Category 1 | 971 mb | – |
| Storm 19 of 1984 | Nov 23–28 | 35 mph | Depression | – | – |
| Lili | Dec 12–24 | 80 mph | Category 1 | 980 mb | – |
Against other Atlantic seasons
Accumulated cyclone energy of every season; the red bar is 1984.