The 1985 Atlantic hurricane season was an average yet destructive hurricane season. It featured a near-record number of hurricanes landfalls in the United States – six – tied with 2020 and only surpassed by 1886. The season officially began on June 1 and lasted until November 30. This was partially attributed to a La Niña – a meteorological phenomenon that produces favorable conditions across the Atlantic basin, such as lower wind shear and higher sea surface temperatures. The first storm, Ana, developed on July 15 near Bermuda and caused minor effects in Canada while transitioning into an extratropical cyclone. Three other tropical cyclones – Claudette, Henri, and Isabel – did not significantly affect land. Claudette developed offshore of the Southeastern United States and brushed Bermuda and the Azores. Henri and Isabel were dissipating as they approached land. However, the precursor of the latter caused a severe flood in Puerto Rico that killed 180 people. Additionally, Tropical Storm Fabian and three tropical depressions did not have any known impact on land.

Although several storms caused minimal effects, several tropical cyclones also left extensive impact. Hurricane Gloria, the strongest storm of the season, resulted in 14 fatalities and about $900 million (1985 USD) in damage in North Carolina, Virginia, the Mid-Atlantic, and New England. Hurricane Elena threatened the central Gulf Coast of the United States, then abruptly re-curved toward Florida. Unexpectedly, Elena doubled-back and struck Mississippi, resulting in two mass evacuations. The storm caused $1.3 billion in losses, with most of the damage in Louisiana and Mississippi. Similarly, Hurricane Juan caused $1.5 billion in damage due to its erratic track offshore and across Louisiana. Three other tropical cyclones – Hurricanes Bob, Danny, and Kate – caused moderate to extensive damage in Cuba and the United States. Kate was a unusually late and record breaking November hurricane that struck the Florida on the 21st; a record for the latest U.S. hurricane. Overall, the tropical cyclones of this season collectively caused over $4.52 billion in damage and 60 deaths.

Seasonal forecasts +Predictions of tropical activity in the 1985 seasonSourceDateNamedstormsHurricanesMajorhurricanesRefRecord high activity30157†Record low activity10†0†WRC Early 1985 10 5 N/A CSU April 1985 11 8 N/A CSU June 1985 11 8 N/A CSU August 1985 10 7 N/A Actual activity 11 7 3 Forecasts of hurricane activity are issued before each hurricane season by Dr. William M. Gray and his associates at Colorado State University (CSU) and the Weather Research Center (WRC). A normal season as defined by the National Oceanic and Atmospheric Administration (NOAA) has 12.1 named storms, of which 6.4 reach hurricane strength, and 2.7 become major hurricanes. Neither CSU nor WRC issued a forecast on the number of major hurricanes, which are Category 3 or higher on the Saffir–Simpson hurricane wind scale. In early 1985, WRC predicted 8 named storms and 5 hurricanes. The CSU forecast for April 1985 was 11 named storms and 8 hurricanes. This forecast was not revised in June. In their August outlook, CSU predicted 10 named storms and 7 hurricanes.

Season summary

The Atlantic hurricane season officially began on June 1, but activity in 1985 began more than a month and a half later with the formation of Tropical Storm Ana on July 15. It was an average season in which 13 tropical depressions formed. Eleven of the depressions attained tropical storm status and seven of these attained hurricane status. In addition, three tropical cyclone eventually attained major hurricane status, which is slightly above the 1981–2010 average of 2.7 per season. The amount of activity is attributed to a La Niña that persisted since the previous season. Seven hurricanes and two tropical storms made landfall during the season, causing 60 deaths and $4.52 billion in damage. The last storm of the season, Tropical Depression Thirteen, dissipated on December 9, over a week after the official end of the season on November 30.

Tropical cyclogenesis in the 1985 Atlantic hurricane season began with the development Tropical Storm Ana on July 15. Less than a week later, Hurricane Bob developed in the Gulf of Mexico. Activity briefly halted until Hurricane Claudette formed offshore Georgia on August 9. The month of August also featured Hurricanes Danny and Elena. As September is the climatological peak of hurricane season, it was the most active month. Five tropical cyclones developed, including two tropical depressions, Tropical Storms Fabian and Henri, and Hurricane Gloria. Thereafter, activity began to slow, with Tropical Storm Isabel and Hurricane Juan in October. Another named storm, Hurricane Kate, developed near Puerto Rico on November 15. The final tropical cyclone of the season, Tropical Depression Thirteen, developed in the Caribbean Sea on December 7 and dissipated by late on December 9.

The season's activity was reflected with a cumulative accumulated cyclone energy (ACE) rating of 88, 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 or tropical storm strength. Subtropical cyclones are excluded from the total.

Systems Tropical Storm Ana

In the second week of July, an area of convection merged with a cut-off low-pressure area, which developed on July 8. After about 7 days, ship data indicated that a circulation developed on July 15. Thus, the system became Tropical Depression One at 1800 UTC that same day, while located south-southeast of Bermuda. The depression slowly curved northwestward around Bermuda and began strengthening. By late on July 16, the depression strengthened into Tropical Storm Ana. Thereafter, the storm turned northward and passed west of Bermuda later that day. On July 17, Ana accelerate north-northeastward under the influence of a frontal system and eventually paralleled Nova Scotia.

While passing close to Sable Island on July 19, Ana peaked with winds of . Shortly thereafter, the storm merged with frontal system, hours before it crossed the Burin Peninsula of Newfoundland. The storm produced relatively light winds on Bermuda, with sustained winds of and gusts up to , causing no damage. Ana and its remnants dropped light rainfall and produced moderate winds on Sable Island and Nova Scotia. On Sable Island, rainfall peaked at , while or less was reported on eastern Nova Scotia. After becoming extratropical, the system dropped slightly heavier precipitation amounts over southeastern Newfoundland, which peaked at .

Hurricane Bob

A tropical wave developed into Tropical Depression Two in the eastern Gulf of Mexico on July 21. The depression drifted southeastward and then northeastward without significant intensification. However, late on July 22, it was upgraded to Tropical Storm Bob. The cyclone made landfall near Fort Myers, Florida with winds of on the following day. While crossing Florida, Bob curved sharply northward and emerged into the Atlantic Ocean near Vero Beach early on July 24. It continued to strengthen and reached hurricane intensity later that day and peaked with winds of . At 0300 UTC on July 25, Bob made landfall near Beaufort, South Carolina at the same intensity. The storm weakened quickly inland and was absorbed by a frontal trough over West Virginia on July 26.

Bob dropped heavy rainfall in South Florida, peaking at in Everglades City. Localized flooding occurred, but was mostly limited to inundated streets and minor damage to crops. Hurricane-force winds were observed in South Carolina. Falling trees and power lines left 32,000 residents without electricity, most of which were in the Charleston area. One person was killed in North Carolina from a traffic accident. The storm produced three tornadoes in Virginia, one of which destroyed two homes and another damaged ten homes. Gusty winds and heavy rainfall also knocked over gateways, tents, and portable toilets at the 1985 Boy Scouts of America National Scout Jamboree at Fort A. P. Hill, injuring several scouts. Four people died in Washington, D.C. and Maryland from traffic accidents caused by slick roads. Overall, Bob caused about $20 million in damage and 5 fatalities.

Hurricane Claudette

A trough and an associated low-level circulation were observed over the Gulf Coast of the United States on August 7. The system moved eastward and entered the Atlantic Ocean, where it transitioned into a low-pressure area offshore Georgia on August 9. Around that time, the system developed into a subtropical depression. It strengthened and slowly acquired tropical characteristics while moving east-northeastward. Early on August 11, the depression was reclassified as Tropical Storm Claudette. As the storm passed north of Bermuda late on August 12, minor effects were reported, with sustained winds reaching and rainfall up to . Continuing eastward, Claudette attained hurricane status early on August 14.

At 1200 UTC on August 15, Claudette peaked with winds of and a minimum barometric pressure of . However, colder sea surface temperatures caused Claudette to weaken to a tropical storm early on August 16. The storm turned northeast and struck Corvo Island in the Azores later that day. At Lajes das Flores on Flores Island, sustained winds reached , with gusts up to . Furthermore, higher elevations on the island of Flores reported winds as strong as . At 0000 UTC on August 17, the storm transitioned into an extratropical cyclone, while located north-northeast of the Azores.

Hurricane Danny

A tropical wave developed into Tropical Depression Four on August 12, while located near Grand Cayman. The depression moved northwestward and initially remained weak. Early on August 13, it brushed Cape San Antonio, Cuba before emerging the Gulf of Mexico later that day. The system then intensified into Tropical Storm Danny on August 14. Danny deepened further and became a hurricane early on the following day, while beginning to re-curve north-northwestward. At 1620 UTC on August 16, Danny attained its peak intensity with winds of and a minimum barometric pressure of . Only 10 minutes later, the storm made landfall near Grand Chenier, Louisiana at the same intensity. Early on August 17, Danny weakened to a tropical storm and was downgraded to a tropical depression several hours later. It moved east-northeastward across the Southeastern United States, until dissipating over southeastern Virginia on August 18.

There was widespread coastal and inland flooding in Louisiana. The storm brought up to of precipitation to Kentwood. Additionally, there were two tornadoes reported in the state. Overall, 33 single-family homes and 26 mobile homes were destroyed, while 3 condos, 908 single-family houses and 265 mobile homes were damaged. A combination of rainfall and storm surge in southern Mississippi caused severe beach erosion and flooded 70 homes in Hancock County alone. Further north, a tornado in Enterprise severely damaged 6 homes, 3 barns, and 2 roofs; it also destroyed 1 house. In Alabama, the storm spawned 34 tornadoes, which destroyed 27 single-family residences and 18 mobile homes. About 90 homes, 8 mobile homes, and 23 businesses suffered damage. Impact was similar but less severe in several other states, including Georgia, Maryland, South Carolina, Virginia, and Texas. Danny caused 5 fatalities and about $100 million in damage.

Hurricane Elena