The 1940 season

Unnamed tropical depression (1940)

Unnamed tropical depression peaked at unknown kt in the Western Pacific between September 9, 1940 and September 19, 1940.

Track and intensity

The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 1940 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
September 9, 1940 to September 19, 1940
Peak strength
Tropical Depression
Landfall
No; closest approach 155 km (96 mi)
Accumulated cyclone energy
0.0
Identifier
1940253N10156

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 9, 12:0010.1N 155.8ETropical storm
Sep 9, 18:0010.2N 155.1ETropical storm
Sep 10, 00:0010.4N 154.3ETropical storm
Sep 10, 06:0010.6N 153.0ETropical storm
Sep 10, 12:0010.9N 150.5ETropical storm
Sep 10, 18:0011.3N 147.1ETropical storm
Sep 11, 00:0011.5N 145.1ETropical storm
Sep 11, 06:0011.5N 144.7ETropical storm
Sep 11, 12:0011.8N 144.3ETropical storm
Sep 11, 18:0012.3N 143.8ETropical storm
Sep 12, 00:0012.7N 143.5ETropical storm
Sep 12, 06:0013.0N 143.4ETropical storm
Sep 12, 12:0013.3N 143.1ETropical storm
Sep 12, 18:0013.9N 142.7ETropical storm
Sep 13, 00:0014.3N 142.4ETropical storm
Sep 13, 06:0014.5N 142.2ETropical storm
Sep 13, 12:0014.9N 142.1ETropical storm
Sep 13, 18:0015.5N 142.0ETropical storm
Sep 14, 00:0015.8N 142.0ETropical storm
Sep 14, 06:0016.1N 142.0ETropical storm
Sep 14, 12:0017.0N 141.5ETropical storm
Sep 14, 18:0018.4N 140.5ETropical storm
Sep 15, 00:0019.5N 139.9ETropical storm
Sep 15, 06:0020.1N 139.5ETropical storm
Sep 15, 12:0021.2N 139.2ETropical storm
Sep 15, 18:0022.7N 138.7ETropical storm
Sep 16, 00:0023.6N 138.4ETropical storm
Sep 16, 06:0024.1N 138.3ETropical storm
Sep 16, 12:0024.9N 138.4ETropical storm
Sep 16, 18:0026.2N 138.6ETropical storm
Sep 17, 00:0027.3N 138.9ETropical storm
Sep 17, 06:0028.3N 139.3ETropical storm
Sep 17, 12:0029.9N 139.9ETropical storm
Sep 17, 18:0032.0N 140.7ETropical storm
Sep 18, 00:0034.3N 142.0ETropical storm
Sep 18, 06:0036.7N 143.8ETropical storm
Sep 18, 12:0039.3N 145.8ETropical storm
Sep 18, 18:0041.9N 148.1ETropical storm
Sep 19, 00:0043.7N 149.8ETropical storm
Sep 19, 06:0044.6N 151.1ETropical storm
Sep 19, 12:0046.3N 154.1ETropical storm
Sep 19, 18:0048.7N 159.3ETropical storm

Other Western Pacific storms of 1940

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.