The 1970 season

Unnamed hurricane (1970)

Unnamed hurricane reached Category 1 in the North Atlantic between September 30, 1970 and October 22, 1970, with a lowest pressure of 989 mb, and made landfall.

Track and intensity

The whole track of Unnamed hurricane, colored by strength, with the other storms of the 1970 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.

Open the live map with storms, cones and warnings

The storm

Basin
North Atlantic
Dates
September 30, 1970 to October 22, 1970
Peak strength
Category 1, 75 kt (86 mph)
Lowest pressure
989 mb (29.21 inHg)
Landfall
Yes
Accumulated cyclone energy
11.1
Fastest the center moved
34 kt (39 mph)
Identifier
AL151970

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
Sep 30, 12:0015.0N 54.5W40 kt1001 mbTropical storm
Sep 30, 18:0014.6N 55.7W40 kt1001 mbTropical storm
Oct 1, 00:0014.2N 56.8W35 kt1004 mbTropical storm
Oct 1, 06:0013.9N 57.9W35 kt1002 mbTropical storm
Oct 1, 12:0013.8N 58.9W35 kt1003 mbTropical storm
Oct 1, 18:0013.8N 59.6W35 kt1004 mbTropical storm
Oct 2, 00:0013.9N 60.0W40 kt1000 mbTropical storm
Oct 2, 06:0014.0N 60.2W40 kt999 mbTropical storm
Oct 2, 12:0013.7N 60.8W40 kt999 mbTropical storm
Oct 2, 18:0013.4N 61.5W40 ktTropical storm
Oct 3, 00:0013.2N 62.2W35 ktTropical storm
Oct 3, 06:0013.3N 62.9W35 kt1005 mbTropical storm
Oct 3, 12:0013.6N 63.7W35 kt1003 mbTropical storm
Oct 3, 18:0013.7N 64.6W35 kt1004 mbTropical storm
Oct 4, 00:0013.7N 65.4W30 ktDisturbance
Oct 4, 06:0013.7N 66.2W30 ktDisturbance
Oct 4, 12:0013.7N 67.0W30 ktDisturbance
Oct 4, 18:0013.8N 67.8W30 ktDisturbance
Oct 5, 00:0014.0N 68.5W30 ktTropical depression
Oct 5, 06:0014.2N 69.0W30 ktTropical depression
Oct 5, 12:0014.5N 69.4W35 ktTropical storm
Oct 5, 18:0014.9N 69.7W35 kt1004 mbTropical storm
Oct 6, 00:0015.3N 69.9W35 kt1004 mbTropical storm
Oct 6, 06:0015.6N 70.0W35 kt1005 mbTropical storm
Oct 6, 12:0015.8N 70.0W35 kt1005 mbTropical storm
Oct 6, 18:0015.7N 70.2W35 kt1004 mbTropical storm
Oct 7, 00:0015.6N 70.1W35 kt1000 mbTropical storm
Oct 7, 06:0015.3N 70.0W35 kt1002 mbTropical storm
Oct 7, 12:0015.4N 70.5W30 kt1003 mbTropical depression
Oct 7, 18:0016.1N 70.8W30 kt1004 mbTropical depression
Oct 8, 00:0016.9N 70.9W30 kt1004 mbTropical depression
Oct 8, 06:0017.8N 70.8W30 ktTropical depression
Oct 8, 12:0018.8N 70.6W25 ktTropical depression
Oct 8, 18:0019.7N 70.2W25 ktTropical depression
Oct 9, 00:0020.5N 69.4W25 ktTropical depression
Oct 9, 06:0021.2N 68.4W25 ktTropical depression
Oct 9, 12:0022.0N 67.3W30 ktTropical depression
Oct 9, 18:0023.0N 66.1W30 ktTropical depression
Oct 10, 00:0024.1N 64.8W30 ktTropical depression
Oct 10, 06:0025.3N 63.2W35 ktTropical storm
Oct 10, 12:0026.5N 61.6W40 kt1000 mbTropical storm
Oct 10, 18:0027.4N 60.1W40 ktTropical storm
Oct 11, 00:0027.5N 57.7W40 ktTropical storm
Oct 11, 06:0027.5N 55.0W35 ktDisturbance
Oct 11, 12:0027.4N 52.0W30 ktDisturbance
Oct 11, 18:0027.3N 49.2W30 ktDisturbance
Oct 12, 00:0027.2N 46.5W30 ktDisturbance
Oct 12, 06:0027.2N 44.0W30 ktDisturbance
Oct 12, 12:0027.4N 41.5W30 ktDisturbance
Oct 12, 18:0027.8N 39.2W30 ktExtratropical
Oct 13, 00:0028.3N 37.0W30 ktExtratropical
Oct 13, 06:0028.8N 35.0W35 ktExtratropical
Oct 13, 12:0029.4N 33.0W35 ktExtratropical
Oct 13, 18:0030.2N 31.0W35 ktExtratropical
Oct 14, 00:0031.3N 28.8W35 ktExtratropical
Oct 14, 06:0032.6N 26.6W35 ktExtratropical
Oct 14, 12:0033.5N 25.1W40 ktExtratropical
Oct 14, 18:0034.1N 23.9W40 ktExtratropical
Oct 15, 00:0034.5N 22.9W40 ktExtratropical
Oct 15, 06:0034.9N 22.1W40 ktExtratropical
Oct 15, 12:0035.2N 21.4W45 ktSubtropical storm
Oct 15, 18:0035.6N 20.7W45 kt997 mbSubtropical storm
Oct 16, 00:0036.0N 20.3W45 kt998 mbSubtropical storm
Oct 16, 06:0036.5N 20.0W45 kt998 mbSubtropical storm
Oct 16, 12:0036.7N 20.2W45 kt997 mbSubtropical storm
Oct 16, 18:0037.0N 21.2W50 kt995 mbSubtropical storm
Oct 17, 00:0037.1N 22.7W60 kt992 mbTropical storm
Oct 17, 06:0036.7N 24.3W65 kt989 mbHurricane
Oct 17, 12:0036.2N 25.8W65 ktHurricane
Oct 17, 18:0035.8N 27.5W70 ktHurricane
Oct 18, 00:0035.5N 29.2W70 ktHurricane
Oct 18, 06:0035.4N 30.7W70 ktHurricane
Oct 18, 12:0035.4N 32.1W75 ktHurricane
Oct 18, 18:0035.6N 33.3W75 ktHurricane
Oct 19, 00:0036.0N 34.3W75 ktHurricane
Oct 19, 06:0036.5N 35.1W75 ktHurricane
Oct 19, 12:0037.2N 35.9W75 ktHurricane
Oct 19, 18:0038.0N 36.7W75 ktHurricane
Oct 20, 00:0038.8N 37.4W70 ktHurricane
Oct 20, 06:0039.8N 38.0W65 ktHurricane
Oct 20, 12:0040.7N 38.5W60 ktTropical storm
Oct 20, 18:0041.7N 38.8W55 ktTropical storm
Oct 21, 00:0042.8N 39.0W50 ktExtratropical
Oct 21, 06:0044.3N 38.8W50 ktExtratropical
Oct 21, 12:0046.5N 38.0W50 ktExtratropical
Oct 21, 18:0049.5N 36.0W45 ktExtratropical
Oct 22, 00:0052.5N 33.5W40 ktExtratropical
Oct 22, 06:0055.5N 31.0W40 ktExtratropical

Other North Atlantic storms of 1970

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.