The 1939 season

Unnamed tropical depression (1939)

Unnamed tropical depression peaked at unknown kt in the Western Pacific between August 20, 1939 and September 3, 1939, and made landfall.

Track and intensity

The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 1939 season in the same basin behind it, and its wind and pressure hour by hour. Every fix is in the track table below.

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The storm

Basin
Western Pacific
Dates
August 20, 1939 to September 3, 1939
Peak strength
Tropical Depression
Landfall
Yes
Accumulated cyclone energy
0.0
Identifier
1939232N11150

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 20, 00:0011.0N 149.4ETropical storm
Aug 20, 06:0011.2N 148.1ETropical storm
Aug 20, 12:0011.6N 146.9ETropical storm
Aug 20, 18:0012.2N 146.0ETropical storm
Aug 21, 00:0012.7N 145.4ETropical storm
Aug 21, 06:0013.2N 145.0ETropical storm
Aug 21, 12:0013.6N 143.7ETropical storm
Aug 21, 18:0013.9N 141.4ETropical storm
Aug 22, 00:0014.1N 139.8ETropical storm
Aug 22, 06:0014.1N 138.8ETropical storm
Aug 22, 12:0014.3N 137.3ETropical storm
Aug 22, 18:0014.5N 135.5ETropical storm
Aug 23, 00:0014.7N 134.4ETropical storm
Aug 23, 06:0014.9N 133.9ETropical storm
Aug 23, 12:0015.3N 133.4ETropical storm
Aug 23, 18:0015.7N 132.7ETropical storm
Aug 24, 00:0016.3N 132.4ETropical storm
Aug 24, 06:0017.1N 132.3ETropical storm
Aug 24, 12:0018.2N 132.5ETropical storm
Aug 24, 18:0019.3N 132.9ETropical storm
Aug 25, 00:0020.1N 133.3ETropical storm
Aug 25, 06:0020.6N 133.5ETropical storm
Aug 25, 12:0021.3N 133.6ETropical storm
Aug 25, 18:0022.2N 133.6ETropical storm
Aug 26, 00:0022.9N 133.6ETropical storm
Aug 26, 06:0023.6N 133.5ETropical storm
Aug 26, 12:0024.3N 133.0ETropical storm
Aug 26, 18:0025.2N 132.0ETropical storm
Aug 27, 00:0025.7N 131.3ETropical storm
Aug 27, 06:0026.0N 130.8ETropical storm
Aug 27, 12:0026.5N 129.8ETropical storm
Aug 27, 18:0027.1N 128.6ETropical storm
Aug 28, 00:0027.6N 127.6ETropical storm
Aug 28, 06:0027.8N 127.1ETropical storm
Aug 28, 12:0028.2N 126.3ETropical storm
Aug 28, 18:0028.8N 125.2ETropical storm
Aug 29, 00:0029.4N 124.4ETropical storm
Aug 29, 06:0030.0N 124.1ETropical storm
Aug 29, 12:0030.7N 123.8ETropical storm
Aug 29, 18:0031.5N 123.4ETropical storm
Aug 30, 00:0032.2N 123.1ETropical storm
Aug 30, 06:0032.8N 122.8ETropical storm
Aug 30, 12:0033.8N 122.2ETropical storm
Aug 30, 18:0035.1N 121.2ETropical storm
Aug 31, 00:0036.0N 120.3ETropical storm
Aug 31, 06:0036.5N 119.8ETropical storm
Aug 31, 12:0036.9N 119.4ETropical storm
Aug 31, 18:0037.3N 119.0ETropical storm
Sep 1, 00:0037.4N 118.7ETropical storm
Sep 1, 06:0037.3N 118.4ETropical storm
Sep 1, 12:0037.2N 118.8ETropical storm
Sep 1, 18:0037.3N 119.8ETropical storm
Sep 2, 00:0037.5N 120.4ETropical storm
Sep 2, 06:0037.6N 120.5ETropical storm
Sep 2, 12:0037.9N 120.5ETropical storm
Sep 2, 18:0038.2N 120.3ETropical storm
Sep 3, 00:0038.5N 119.6ETropical storm
Sep 3, 06:0038.8N 118.7ETropical storm
Sep 3, 12:0039.0N 118.7ETropical storm
Sep 3, 18:0039.1N 120.0ETropical storm

Other Western Pacific storms of 1939

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.