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HurriTracker

1984 Atlantic hurricane season

Jun 1, 1984 – Nov 30, 1984 · Season ended

The 1984 Atlantic hurricane season produced 13 named storms, 5 hurricanes and 1 major hurricane, against a 1991–2020 average of 14.4, 7.2 and 3.2. Its accumulated cyclone energy was 84, 69% of the average.

1983 season1985 seasonAll Atlantic seasons
Named storms
13
Avg 14.4 (1991–2020)
Hurricanes
5
64 kt or stronger · avg 7.2
Major (Cat 3+)
1
Avg 3.2 per season
Accumulated energy
69% of normal
ACE 84 vs 1991–2020 avg 123
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Tracks colored by peak strengthTDTSC1C2C4

1984 season at a glance

  • Named storms: 13 (1991–2020 average 14.4).
  • Hurricanes (64 kt+): 5 (average 7.2).
  • Major, 96 kt+: 1 (average 3.2).
  • Accumulated cyclone energy: 84.3, 69% of the 123 average.
  • Named-storm days: 63.3, counting each six-hourly fix at 34 kt or more as a quarter day.
  • First named storm: Tropical Storm 5L, August 19.
  • First hurricane: Diana, September 10.
  • First major storm: Diana, September 11.
  • Last storm to dissipate: Lili, December 24.
  • All systems tracked: 20, including 7 that stayed below tropical-storm strength.

Counts use 1-minute best-track winds: named storms reached 34 kt (39 mph), the next column 64 kt (74 mph) and major storms 96 kt (111 mph).

Every storm of the 1984 season

StormDatesPeakMin pressureLandfall
TD 1L – TD——
TD 2L – TD—Moralillo, Mexico
TD 3L – TD——
TD 4L – TD——
TD 5L – TS1000 mb—
Arthur – TS1004 mb—
Bertha – TS1007 mb—
Cesar – TS989 mb—
TD 9L – TD—Aldama, Mexico
Diana – C4949 mbLong Beach, United States
Edouard – TS998 mb—
Fran – TS994 mb—
Gustav – TS1006 mb—
Hortense – C1993 mb—
Isidore – TS999 mbJupiter, United States
Josephine – C2965 mb—
TD 17L – TD—Okeechobee, United States
Klaus – C1971 mbYabucoa, Puerto Rico
TD 19L – TD——
Lili – C1980 mbSamaná, Dominican Republic
  • TD 1L: This system formed in the Atlantic in June 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It did not make landfall. The system was tracked for 3 days.
  • TD 2L: This system formed in the Atlantic in June 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It made landfall near Moralillo, Mexico. The system was tracked for 2 days.
  • TD 3L: This system formed in the Atlantic in July 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It did not make landfall. The system was tracked for 3 days.
  • TD 4L: This system formed in the Atlantic in August 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It did not make landfall. The system was tracked for 2 days.
  • TD 5L: This system formed in the Atlantic in August 1984 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 1000 mb. It did not make landfall. The system was tracked for 3 days.
  • Arthur: Arthur formed in the Atlantic in August 1984 and peaked as a tropical storm with maximum sustained winds of 50 mph (85 km/h) and a minimum pressure of 1004 mb. It did not make landfall. The system was tracked for 8 days.
  • Bertha: Bertha formed in the Atlantic in August 1984 and peaked as a tropical storm with maximum sustained winds of 40 mph (65 km/h) and a minimum pressure of 1007 mb. It did not make landfall. The system was tracked for 5 days.
  • Cesar: Cesar formed in the Atlantic in August 1984 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 989 mb. It did not make landfall. The system was tracked for 3 days.
  • TD 9L: This system formed in the Atlantic in September 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It made landfall near Aldama, Mexico. The system was tracked for 2 days.
  • Diana: Diana formed in the Atlantic in September 1984 and peaked as a Category 4 hurricane with maximum sustained winds of 130 mph (215 km/h) and a minimum pressure of 949 mb. It made landfall near Long Beach, United States. The system was tracked for 8 days.
  • Edouard: Edouard formed in the Atlantic in September 1984 and peaked as a tropical storm with maximum sustained winds of 65 mph (100 km/h) and a minimum pressure of 998 mb. It did not make landfall. The system was tracked for 2 days.
  • Fran: Fran formed in the Atlantic in September 1984 and peaked as a tropical storm with maximum sustained winds of 65 mph (100 km/h) and a minimum pressure of 994 mb. It did not make landfall. The system was tracked for 5 days.
  • Gustav: Gustav formed in the Atlantic in September 1984 and peaked as a tropical storm with maximum sustained winds of 50 mph (85 km/h) and a minimum pressure of 1006 mb. It did not make landfall. The system was tracked for 3 days.
  • Hortense: Hortense formed in the Atlantic in September 1984 and peaked as a Category 1 hurricane with maximum sustained winds of 75 mph (120 km/h) and a minimum pressure of 993 mb. It did not make landfall. The system was tracked for 10 days.
  • Isidore: Isidore formed in the Atlantic in September 1984 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 999 mb. It made landfall near Jupiter, United States. The system was tracked for 6 days.
  • Josephine: Josephine formed in the Atlantic in October 1984 and peaked as a Category 2 hurricane with maximum sustained winds of 105 mph (165 km/h) and a minimum pressure of 965 mb. It did not make landfall. The system was tracked for 14 days.
  • TD 17L: This system formed in the Atlantic in October 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It made landfall near Okeechobee, United States. The system was tracked for 3 days.
  • Klaus: Klaus formed in the Atlantic in November 1984 and peaked as a Category 1 hurricane with maximum sustained winds of 90 mph (150 km/h) and a minimum pressure of 971 mb. It made landfall near Yabucoa, Puerto Rico. The system was tracked for 8 days.
  • TD 19L: This system formed in the Atlantic in November 1984 and peaked as a tropical depression with maximum sustained winds of 35 mph (55 km/h). It did not make landfall. The system was tracked for 5 days.
  • Lili: Lili formed in the Atlantic in December 1984 and peaked as a Category 1 hurricane with maximum sustained winds of 80 mph (130 km/h) and a minimum pressure of 980 mb. It made landfall near Samaná, Dominican Republic. The system was tracked for 12 days.

Each summary is built from the storm’s best track.

Strongest storm of 1984

Hurricane Diana was the strongest storm of the season, peaking at 130 mph (215 km/h), with a lowest pressure of 949 mb, on September 12. That is Category 4 strength on the Saffir-Simpson scale.

76 Atlantic storms since 1980 peaked higher, and 8 matched it. It produced 18% of the season’s accumulated cyclone energy.

Landfalls in 1984

7 of the season’s 20 systems made landfall, 1 of them at hurricane strength. Each landfall point is listed with the nearest town and the wind at that moment.

  • June 20: TD 2L near Moralillo, Mexico, 35 mph (tropical depression)
  • September 8: TD 9L near Aldama, Mexico, 30 mph (tropical depression)
  • September 13: Diana near Long Beach, United States, 90 mph (Category 1)
  • September 27: Isidore near Jupiter, United States, 55 mph (tropical storm)
  • October 26: TD 17L near Okeechobee, United States, 30 mph (tropical depression)
  • November 7: Klaus near Yabucoa, Puerto Rico, 50 mph (tropical storm)
  • December 24: Lili near Samaná, Dominican Republic, 30 mph (tropical depression)

How 1984 ranks since 1980

The season ranks 24th of 47 Atlantic seasons since 1980 for named storms (tied with 2 other seasons), 30th for hurricanes (tied with 3 other seasons) and 30th for accumulated cyclone energy.

The record since 1980 is 30 named storms, in 2020, and the highest ACE is 250, in 2005.

1984 storm names

The 1984 season used 12 names: Arthur, Bertha, Cesar, Diana, Edouard, Fran, Gustav, Hortense, Isidore, Josephine, Klaus, Lili.

8 systems were tracked without a name and are listed by number.

Atlantic and East Pacific lists repeat every six years. See how storms are named.

1984 season FAQ

How many named storms were there in 1984?

The 1984 Atlantic hurricane season had 13 named storms, 5 hurricanes and 1 major hurricane, from 20 systems tracked in all. The 1991–2020 average is 14.4 named storms, 7.2 at 64 kt or more and 3.2 major per season. The first to form was Tropical Storm 5L and the last was Lili.

What was the strongest storm of 1984?

Hurricane Diana. It peaked at 130 mph (215 km/h, 115 kt) with a lowest pressure of 949 mb on September 12. That is Category 4 strength on the Saffir-Simpson scale. 76 Atlantic storms since 1980 peaked higher. It produced 18% of the season’s accumulated cyclone energy.

When did the 1984 season end?

The official season ended on November 30, 1984, as it does every year in the Atlantic, eastern Pacific and Central Pacific. The last system, Lili, dissipated on December 24. Storms that form in December still count toward that year: 6 Atlantic storms since 1980 reached tropical-storm strength in December.