1984 Atlantic hurricane season
| 1984 Atlantic hurricane season |
Season summary map
|
| Seasonal boundaries |
| First system formed |
June 11, 1984 |
| Last system dissipated |
December 24, 1984 |
| Strongest storm |
|
| Name |
Diana |
| • Maximum winds |
130 mph (215 km/h)
(1-minute sustained) |
| • Lowest pressure |
949 mbar (hPa; 28.02 inHg) |
| Seasonal statistics |
| Total depressions |
18 |
| Total storms |
13 |
| Hurricanes |
5 |
Major hurricanes
(Cat. 3+) |
1 |
| Total fatalities |
35 |
| Total damage |
$66.4 million (1984 USD) |
|
|
Atlantic hurricane seasons
1982, 1983, 1984, 1985, 1986
|
| Tropical depression (SSHWS) |
|
|
| Duration |
June 11 – June 14 |
| Peak intensity |
35 mph (55 km/h) (1-min) ≤ 1016 mbar (hPa) |
| Tropical depression (SSHWS) |
|
|
| Duration |
June 18 – June 20 |
| Peak intensity |
35 mph (55 km/h) (1-min) 1008 mbar (hPa) |
| Tropical depression (SSHWS) |
|
|
| Duration |
July 25 – July 26 |
| Peak intensity |
35 mph (55 km/h) (1-min) 1000 mbar (hPa) |
| Subtropical storm (SSHWS) |
|
|
| Duration |
August 18 – August 21 |
| Peak intensity |
60 mph (95 km/h) (1-min) 1000 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
August 28 – September 5 |
| Peak intensity |
50 mph (85 km/h) (1-min) 1004 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
August 30 – September 4 |
| Peak intensity |
40 mph (65 km/h) (1-min) 1007 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
August 31 – September 2 |
| Peak intensity |
60 mph (95 km/h) (1-min) 994 mbar (hPa) |
| Tropical depression (SSHWS) |
|
|
| Duration |
September 6 – September 8 |
| Peak intensity |
35 mph (55 km/h) (1-min) |
| Category 4 hurricane (SSHWS) |
|
|
| Duration |
September 8 – September 16 |
| Peak intensity |
130 mph (215 km/h) (1-min) 949 mbar (hPa) |
The 1984 Atlantic hurricane season was the busiest since 1971. It officially began on June 1, 1984, and lasted until November 30, 1984. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The 1984 season was an active one in terms of named storms, but most of them were weak and stayed at sea. Most of the cyclones tracked through the northwest subtropical Atlantic west of the 50th meridian to near the Eastern coast of the United States between mid-August and early October. The most damaging storm was Hurricane Diana, which caused $65.5 million (1984 dollars) in damage in North Carolina. Diana was the first hurricane to strike a nuclear power plant without incident; it was also the first major hurricane to strike the U.S. East Coast in nearly 20 years. Also of note was Hurricane Lili, which lasted well after the official end of the season. It was downgraded from a named storm on December 24. Damage overall from the tropical cyclones in 1984 totaled $66.4 million (1984 USD).
Six storms during the season had subtropical characteristics at some point in their track, those being Subtropical Storm One, Tropical Storm Cesar, Hurricane Hortense, Hurricane Josephine,Hurricane Klaus, and Hurricane Lili.
The season's activity was reflected with a cumulative accumulated cyclone energy (ACE) rating of 84, which is classified as "near normal". ACE is, broadly speaking, a measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have high ACEs. ACE is only calculated for full advisories on tropical systems at or exceeding 34 knots (39 mph, 63 km/h) or tropical storm strength. Although officially, subtropical cyclones are excluded from the total, the figure above includes periods when storms were in a subtropical phase.
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