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Great Hurricane of 1780

Deadly Atlantic hurricane in 1780

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Areas affected by Great Hurricane (excluding Bermuda)
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The hurricane struck Barbados likely as a Category 5 hurricane, with one estimate of wind gusts as high as 200 mph (320 km/h), before moving past Martinique, Saint Lucia, and Sint Eustatius, and causing thousands of deaths on those islands. Coming in the midst of the American Revolution, the storm caused heavy losses to the British fleet contesting for control of the area, significantly weakening British control over the Atlantic. The hurricane later passed near Puerto Rico and over the eastern portion of Hispaniola, causing heavy damage near the coastlines. It ultimately turned to the northeast and was last observed on October 20 southeast of Atlantic Canada.

The death toll from the Great Hurricane alone exceeds that of many entire decades of Atlantic hurricanes. Estimates are significantly higher than for the 1998 Hurricane Mitch, the second-deadliest Atlantic storm, for which figures are likely more precise. The hurricane was part of the disastrous 1780 Atlantic hurricane season, with two other deadly storms occurring in October.

Meteorological history

This hurricane was first encountered by a boat in the eastern Caribbean Sea, but it may have developed in early October in the eastern Atlantic Ocean off the Cape Verde Islands. The system ultimately strengthened and expanded as it tracked slowly westward; affecting Barbados late on October 9. On October 10, the worst of the hurricane passed over the island, with at least one estimate of gusts as high as 200 mph (320 km/h) during landfall. Early on October 11, the hurricane turned north-northwest about 90 kilometers (56 mi) east of Saint Lucia, and later that night it neared the island of Martinique. The cyclone gradually weakened as it passed to the southwest of Dominica early on October 12 and subsequently struck the island of Guadeloupe.

After hitting Guadeloupe, the hurricane turned west-northwest, passing about 145 km (90 mi) southwest of Saint Kitts. The hurricane steadily neared Puerto Rico as it paralleled the southern coastline, and on October 14 made landfall, to the southwestern-most tip of the island. It subsequently turned to the northwest, going through the Mona Passage before making approaching near the present-day Dominican Republic province of Samaná. Late on October 15, it reached the Atlantic Ocean and after passing about 260 km (160 mi) east of Grand Turk Island; it is estimated to have recurved to the northeast. The hurricane passed 240 km (150 mi) southeast of Bermuda on October 18, and was last observed two days later about 475 km (295 mi) southeast of Cape Race, Newfoundland, Canada.

On October 19, strong winds and high tides were reported in the British province of East Florida (the northeastern portion of present-day Florida). NOAA employees, Christopher W. Landsea and Al Sandrik write that it is possible the hurricane passed much closer to the province than previously thought. Another possibility considered was an extension to a hurricane in the western Caribbean Sea. Because of lack of data, the exact track of the Great Hurricane is unknown.

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