The 1861 season

Unnamed hurricane (1861)

Unnamed hurricane reached Category 1 in the North Atlantic between August 13, 1861 and August 17, 1861.

Radar

Reflectivity now over Unnamed hurricane. Open it to see storms, cones and warnings on the map.

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Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.

The storm

Basin
North Atlantic
Dates
August 13, 1861 to August 17, 1861
Peak strength
Category 1, 80 kt (92 mph)
Landfall
No; closest approach 33 km (21 mi)
Accumulated cyclone energy
8.0
Identifier
AL021861

Deaths and damage

No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.

Track

Time (UTC)PositionWindPressureStatus
Aug 13, 12:0020.5N 70.0W40 ktTropical storm
Aug 13, 18:0021.0N 71.5W40 ktTropical storm
Aug 14, 00:0021.5N 73.0W50 ktTropical storm
Aug 14, 06:0022.0N 74.5W60 ktTropical storm
Aug 14, 12:0022.5N 76.0W70 ktHurricane
Aug 14, 18:0022.9N 77.4W70 ktHurricane
Aug 15, 00:0023.2N 78.7W80 ktHurricane
Aug 15, 06:0023.5N 79.9W80 ktHurricane
Aug 15, 12:0023.7N 80.8W80 ktHurricane
Aug 15, 18:0023.9N 81.5W80 ktHurricane
Aug 16, 00:0024.2N 82.0W80 ktHurricane
Aug 16, 06:0024.6N 82.5W80 ktHurricane
Aug 16, 12:0025.0N 83.0W70 ktHurricane
Aug 16, 18:0025.4N 83.5W70 ktHurricane
Aug 17, 00:0025.8N 84.0W60 ktTropical storm
Aug 17, 06:0026.2N 84.5W60 ktTropical storm
Aug 17, 12:0026.6N 85.0W50 ktTropical storm
Aug 17, 18:0027.0N 85.6W50 ktTropical storm

Other North Atlantic storms of 1861

What this means

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Sources

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

The National Hurricane Center has published no tropical cyclone report for this storm.