1840-1849 Atlantic hurricane seasons

This article encompasses the 1840–49 Atlantic hurricane seasons. While data is not available for every storm that occurred, some parts of the coastline were populated enough to give data of hurricane occurrences. Each season was an ongoing event in the annual cycle of tropical cyclone formation in the Atlantic basin. Most tropical cyclone formation occurs between June 1 and November 30.

June 19-23. In the middle of June, a tropical storm passed west of Lake Charles, Louisiana accompanied by several days of heavy rain. Strong winds on June 21 damaged corn crops.

September 17-18 tropical storm struck Galveston Texas.

On an unspecified date in 1840, a hurricane reportedly caused severe flooding that destroyed entire villages at the mouth of the Rio Grande. Unclear whether these events are related to prior storm that struck Galveston.

August 23-24. tropical storm reported off south U.S. Atlantic coast.

The Late Gale at St. Joseph. September 7-16. A strong tropical storm hit Barbados in early September, then traveled to the Florida Panhandle on September 14 and 15th, and continued on to South Carolina.

September 25-27. A hurricane was reported off the Cape Hatteras coast that later traveled to Nova Scotia.

The October Gale of 1841. September 25-October 4. The hurricane was first reported near Barbados and later became an intense hurricane that remained offshore of the Carolinas in early October. It moved northeastward, entraining cold air into its circulation. It became an extratropical storm, and hit New England on October 3. It led to a storm of snow and sleet in Connecticut, bringing drifts of up to 18 feet (5.5 m) of snow in some areas. The storm wrecked the Georges Bank fishing fleet which drowned 81 fishermen and knocked down trees, tore roofs off houses and forced boats to go up on shore. The storm also destroyed a saltworks factory along Cape Cod, sending the economy to a slump. In 1842, a monument was erected to remember the sailors and fishermen lost at sea to the "October Gale" of 1841.

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