The 1939 season

Unnamed tropical depression (1939)

Unnamed tropical depression peaked at unknown kt in the Western Pacific between September 11, 1939 and September 24, 1939.

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.

Open the live map with storms, cones and warnings

The storm

Basin
Western Pacific
Dates
September 11, 1939 to September 24, 1939
Peak strength
Tropical Depression
Landfall
No; closest approach 255 km (158 mi)
Accumulated cyclone energy
0.0
Identifier
1939254N10148

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 11, 12:0010.2N 147.1ETropical storm
Sep 11, 18:0010.5N 145.6ETropical storm
Sep 12, 00:0010.7N 144.6ETropical storm
Sep 12, 06:0010.8N 144.0ETropical storm
Sep 12, 12:0011.1N 143.3ETropical storm
Sep 12, 18:0011.5N 142.4ETropical storm
Sep 13, 00:0011.8N 141.7ETropical storm
Sep 13, 06:0012.0N 141.2ETropical storm
Sep 13, 12:0012.2N 140.7ETropical storm
Sep 13, 18:0012.5N 140.2ETropical storm
Sep 14, 00:0012.7N 139.8ETropical storm
Sep 14, 06:0013.0N 139.3ETropical storm
Sep 14, 12:0013.4N 138.9ETropical storm
Sep 14, 18:0013.9N 138.4ETropical storm
Sep 15, 00:0014.4N 138.1ETropical storm
Sep 15, 06:0014.8N 138.0ETropical storm
Sep 15, 12:0015.2N 137.7ETropical storm
Sep 15, 18:0015.7N 137.3ETropical storm
Sep 16, 00:0016.1N 137.2ETropical storm
Sep 16, 06:0016.3N 137.2ETropical storm
Sep 16, 12:0016.7N 137.4ETropical storm
Sep 16, 18:0017.1N 137.5ETropical storm
Sep 17, 00:0017.4N 137.6ETropical storm
Sep 17, 06:0017.7N 137.7ETropical storm
Sep 17, 12:0018.0N 137.9ETropical storm
Sep 17, 18:0018.3N 138.1ETropical storm
Sep 18, 00:0018.7N 138.2ETropical storm
Sep 18, 06:0019.0N 138.3ETropical storm
Sep 18, 12:0019.3N 138.1ETropical storm
Sep 18, 18:0019.6N 137.9ETropical storm
Sep 19, 00:0019.7N 137.6ETropical storm
Sep 19, 06:0019.8N 137.3ETropical storm
Sep 19, 12:0019.9N 136.9ETropical storm
Sep 19, 18:0020.0N 136.5ETropical storm
Sep 20, 00:0020.4N 136.2ETropical storm
Sep 20, 06:0021.0N 136.1ETropical storm
Sep 20, 12:0021.6N 136.3ETropical storm
Sep 20, 18:0022.3N 136.7ETropical storm
Sep 21, 00:0022.9N 137.0ETropical storm
Sep 21, 06:0023.4N 137.0ETropical storm
Sep 21, 12:0024.1N 137.2ETropical storm
Sep 21, 18:0025.1N 137.5ETropical storm
Sep 22, 00:0025.9N 137.7ETropical storm
Sep 22, 06:0026.7N 137.9ETropical storm
Sep 22, 12:0028.0N 138.5ETropical storm
Sep 22, 18:0029.8N 139.7ETropical storm
Sep 23, 00:0031.5N 141.1ETropical storm
Sep 23, 06:0033.0N 142.8ETropical storm
Sep 23, 12:0035.3N 144.9ETropical storm
Sep 23, 18:0038.1N 147.4ETropical storm
Sep 24, 00:0040.6N 149.4ETropical storm
Sep 24, 06:0042.6N 150.8ETropical storm
Sep 24, 12:0044.6N 152.9ETropical storm
Sep 24, 18:0046.5N 156.3ETropical 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.