| First storm formed | May 17, 1984 |
|---|---|
| Last storm dissipated | November 8, 1984 |
| Strongest storm | Douglas – 145 mph (230 km/h) (1-minute sustained) |
| Total depressions | 26 |
| Total storms | 21 |
| Hurricanes | 13 |
| Major hurricanes (Cat. 3+) | 7 |
| Total fatalities | 0 |
| Total damage | Unknown |
| Pacific hurricane seasons 1982, 1983, 1984, 1985, 1986 |
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The 1984 Pacific hurricane season officially started May 15, 1984 in the eastern Pacific, and June 1, 1984 in the central Pacific, and lasted until November 30, 1984. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean.
There were 18 tropical storms in the eastern Pacific this season. Twelve became hurricanes. Of those, six became major hurricanes by reaching Category 3 intensity or higher on the Saffir-Simpson Hurricane Scale. In the central Pacific, there was a major hurricane and two tropical storms. There was at least one tropical depression that did not strengthen into a storm.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | May 17 – May 21 | ||
| Intensity | 60 mph (95 km/h) (1-min), Unknown | ||
Alma was a short-lived storm. It developed from a disturbance that later strengthened into Tropical Depression One-E on May 17. It continued strengthening until May 19, when it strengthened into Tropical Storm Alma, the first tropical cyclone and named storm of the season. Alma hit its peak intensity of a strong tropical storm of 60 mph (95 km/h) later that day. No one died as a result of the storm. On May 21, it was downgraded into a depression. Later that same day, Alma was declared dissipated as it degenerated into an open trough. It took a due west path for its entire life, but it never affected land.
| Category 1 hurricane (SSHS) | |||
|---|---|---|---|
|
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| Duration | May 28 – June 18 | ||
| Intensity | 75 mph (120 km/h) (1-min), Unknown | ||
The first Hurricane of the season, Boris was a minimal hurricane whose path included a loop, a rarity in this basin. Boris lasted from May 28 to June 18, a total of 21 days, one of the longest lasting hurricanes ever, and one of the longest-lived storms on record for the East Pacific. It had no effect on land, so as a result, no one died, just like the rest of the storms in the season.
| Category 2 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | June 17 – June 26 | ||
| Intensity | 105 mph (165 km/h) (1-min), Unknown | ||
Cristina was a category 2 storm which did not affect any land.
| Category 4 hurricane (SSHS) | |||
|---|---|---|---|
|
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| Duration | June 25 – July 6 | ||
| Intensity | 145 mph (230 km/h) (1-min), Unknown | ||
A disturbance off the coast of Mexico had no significant convection until June 25, when it strengthened into Tropical Depression Four-E. As it strengthened into a Tropical Storm, it received the name Douglas. It strengthened into a hurricane the next day. It hit its peak intensity of a Category Four on the SSHS on June 28. The next day, Douglas weakened into a category 3, then a category 2 late the same day. It later weakened into a Tropical Storm on June 5, then on June 6, the storm met its demise as it dissipated. Douglas was the strongest storm of the season. Its remnants brought rain to Maui and the Big Island.
| Category 4 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | June 28 – July 8 | ||
| Intensity | 135 mph (215 km/h) (1-min), Unknown | ||
Elida was a powerful category 4 hurricane, but it had no impacts on any land.
| Tropical depression (SSHS) | |||
|---|---|---|---|
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| Duration | June 30 – July 2 | ||
| Intensity | 35 mph (55 km/h) (1-min), Unknown | ||
This tropical depression failed to develop.
| Category 2 hurricane (SSHS) | |||
|---|---|---|---|
|
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| Duration | July 3 – July 10 | ||
| Intensity | 110 mph (175 km/h) (1-min), Unknown | ||
Fausto was a strong category 2 hurricane. It paralleled Baja California, but the hurricane turned away before striking.
| Category 3 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | July 7 – July 14 | ||
| Intensity | 115 mph (185 km/h) (1-min), Unknown | ||
Genevieve approached Baja California Sur, but dissipated without making landfall.
| Tropical depression (SSHS) | |||
|---|---|---|---|
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| Duration | July 24 – July 25 | ||
| Intensity | 30 mph (45 km/h) (1-min), Unknown | ||
This tropical depression moved north-northwest out of the ITCZ.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | July 27 – August 1 | ||
| Intensity | 50 mph (85 km/h) (1-min), Unknown | ||
Hernan was a short-lived and weak tropical storm which had no effects on land.
| Category 4 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | August 3 – August 12 | ||
| Intensity | 135 mph (215 km/h) (1-min), Unknown | ||
Iselle was a powerful category 4 hurricane, but the storm never affected any land.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | August 15 – August 20 | ||
| Intensity | 65 mph (100 km/h) (1-min), Unknown | ||
Julio was a storm which did not have any impacts on land.
| Category 3 hurricane (SSHS) | |||
|---|---|---|---|
|
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| Duration | August 16 – August 22 | ||
| Intensity | 115 mph (185 km/h) (1-min), Unknown | ||
Hurricane Keli was a major hurricane that threatened Johnston Atoll enough to prompt an evacuation. However, intense shear disintegrated the cyclone. There was no damage.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | August 16 – August 21 | ||
| Intensity | 60 mph (95 km/h) (1-min), Unknown | ||
Kenna was a weak tropical storm which did not affect land.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | August 23 – September 2 | ||
| Intensity | 50 mph (85 km/h) (1-min), Unknown | ||
Lala formed from Tropical Depression Fourteen-E, which moved in from the east.
| Category 1 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | August 26 – August 30 | ||
| Intensity | 85 mph (140 km/h) (1-min), Unknown | ||
Lowell was a hurricane that did not impact land.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | September 4 – September 5 | ||
| Intensity | 50 mph (85 km/h) (1-min), Unknown | ||
Moke had uncertain beginnings, as it developed from a cold-core low that eventually became a tropical storm just east of the dateline. It passed close to Kure Atoll, encountered shear, and lost tropical characteristics.
| Category 1 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | September 5 – September 11 | ||
| Intensity | 90 mph (150 km/h) (1-min), Unknown | ||
Hurricane Marie dissipated off the coast of Baja California. Its remnants recurved and brought minor levels of rain to California.
| Tropical depression (SSHS) | |||
|---|---|---|---|
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| Duration | September 11 – September 12 | ||
| Intensity | 35 mph (55 km/h) (1-min), Unknown | ||
This tropical depression formed in the Gulf of Tehuantepec.
| Tropical depression (SSHS) | |||
|---|---|---|---|
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| Duration | September 14 – September 15 | ||
| Intensity | 35 mph (55 km/h) (1-min), Unknown | ||
This tropical depression formed along the coast near Zihuatanejo, Mexico.
| Category 4 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | September 14 – September 26 | ||
| Intensity | 135 mph (215 km/h) (1-min), Unknown | ||
Norbert was a hurricane that took a truly bizarre path. It drifted south, then east, then north, then west, and then south again as it traced out a spiral around its place of cyclogenesis. Norbert then turned east again before accelerating to the northwest. It recurved slightly and it weakened to a small storm before making landfall in Baja California.
| Category 2 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | September 17 – September 23 | ||
| Intensity | 105 mph (165 km/h) (1-min), Unknown | ||
Odile took an erratic path before making landfall near Acapulco on September 22. It dissipated the next day.
| Category 3 hurricane (SSHS) | |||
|---|---|---|---|
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| Duration | September 26 – October 3 | ||
| Intensity | 115 mph (185 km/h) (1-min), Unknown | ||
As a tropical depression, Polo made landfall in the extreme southern part of the Baja California Peninsula on October 3.
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | October 7 – October 16 | ||
| Intensity | 65 mph (100 km/h) (1-min), Unknown | ||
A tropical depression formed on October 7, several hundred miles south of Mexico. It was upgraded to Tropical Storm Rachel on October 9, as it continued westward into the open waters of the Pacific Ocean. Rachel was downgraded to a tropical depression on October 11, as it began to turn northwest. The depression then dissipated in open waters on October 16.[1]
| Tropical storm (SSHS) | |||
|---|---|---|---|
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| Duration | October 31 – November 8 | ||
| Intensity | 65 mph (100 km/h) (1-min), Unknown | ||
Simon was a moderately strong tropical storm which did not affect land.
| Tropical depression (SSHS) | |||
|---|---|---|---|
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| Duration | November 5 – November 5 | ||
| Intensity | 35 mph (55 km/h) (1-min), Unknown | ||
This tropical depression quickly dissipated over cool water.
This is a table of the storms in 1984 and their landfall(s), if any. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but are still storm-related. Damage and deaths include totals while the storm was extratropical or a wave or low.
| Saffir–Simpson Hurricane Scale | ||||||
| TD | TS | C1 | C2 | C3 | C4 | C5 |
| Storm name |
Dates active | Storm category
at peak intensity |
Max wind (mph) |
Min. press. (mbar) |
Landfall(s) | Damage (millions USD) |
Deaths | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Where | When | Wind
(mph) |
||||||||
| Alma | May 17 – May 21 | Tropical storm | 60 | Unknown | none | none | 0 | |||
| Boris | May 28 – June 18 | Category 1 hurricane | 75 | Unknown | none | none | 0 | |||
| Cristina | June 17 – June 26 | Category 2 hurricane | 105 | Unknown | none | none | 0 | |||
| Douglas | June 25 – July 6 | Category 4 hurricane | 145 | Unknown | none | none | 0 | |||
| Elida | June 28 – July 8 | Category 4 hurricane | 135 | Unknown | none | none | 0 | |||
| Six-E | June 30 – July 2 | Tropical depression | 35 | Unknown | none | none | 0 | |||
| Fausto | July 3 – July 10 | Category 2 hurricane | 110 | Unknown | none | none | 0 | |||
| Genevieve | July 7 – July 14 | Category 3 hurricane | 115 | Unknown | none | none | 0 | |||
| Nine-E | July 24 – July 25 | Tropical depression | 35 | Unknown | none | none | 0 | |||
| Hernan | July 27 – August 1 | Tropical storm | 50 | Unknown | none | none | 0 | |||
| Iselle | August 3 – August 12 | Category 4 hurricane | 135 | Unknown | none | none | 0 | |||
| Julio | August 15 – August 20 | Tropical storm | 65 | Unknown | none | none | 0 | |||
| Keli | August 16 – August 22 | Category 3 hurricane | 115 | Unknown | none | none | 0 | |||
| Kenna | August 16 – August 21 | Tropical storm | 60 | Unknown | none | none | 0 | |||
| Lala | August 23 – September 2 | Tropical storm | 50 | Unknown | none | none | 0 | |||
| Lowell | August 26 – August 30 | Category 1 hurricane | 85 | Unknown | none | none | 0 | |||
| Moke | September 4 – September 5 | Tropical storm | 50 | Unknown | none | none | 0 | |||
| Marie | September 5 – September 11 | Category 1 hurricane | 90 | Unknown | none | none | 0 | |||
| Seventeen-E | September 11 – September 12 | Tropical depression | 35 | Unknown | none | none | 0 | |||
| Eighteen-E | September 14 – September 15 | Tropical depression | 35 | Unknown | none | none | 0 | |||
| Norbert | September 14 – September 26 | Category 4 hurricane | 135 | Unknown | Western Baja California | September 26 | 60 | Unknown | Unknown | |
| Odile | September 17 – September 23 | Category 2 hurricane | 105 | Unknown | Near Acapulco, Mexico | September 22 | 50 | Unknown | Unknown | |
| Polo | September 17 – September 27 | Category 3 hurricane | 115 | Unknown | Southern Baja California Sur | September 29 | 35 | Unknown | Unknown | |
| Rachel | October 7 – October 16 | Tropical storm | 65 | Unknown | none | none | 0 | |||
| Simon | October 31 – November 8 | Tropical storm | 65 | Unknown | none | none | 0 | |||
| Twenty-Four-E | November 5 – November 5 | Tropical depression | 35 | Unknown | none | none | 0 | |||
| Season Aggregates | ||||||||||
| 26 cyclones | May 17 – November 5 | 145 | Unknown | 3 landfalls | Unknown | Unknown | ||||
The following names were used for named storms that formed in the eastern Pacific in 1984. Since no one was killed and there was no severe damage from any of this season's storms, no names were retired, so the list of names was used again in the 1990 season, the first time names were reused since the modern naming system began. Names that were not assigned are marked in gray.
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Three names from the Central Pacific list were used - Keli, Lala, and Moke. This was the first usage for all of these names.
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Tropical cyclones of the 1984 Pacific hurricane season |
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