The 1971 season

Unnamed tropical depression (1971)

Unnamed tropical depression peaked at 30 kt in the Western Pacific between August 23, 1971 and August 30, 1971, with a lowest pressure of 988 mb.

Track and intensity

The whole track of Unnamed tropical depression, colored by strength, with the other storms of the 1971 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 23, 1971 to August 30, 1971
Peak strength
Tropical Depression, 30 kt (35 mph)
Lowest pressure
988 mb (29.18 inHg)
Landfall
No; closest approach 855 km (531 mi)
Accumulated cyclone energy
0.0
Identifier
WP361971

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 23, 00:0023.0N 166.4E1010 mbTropical storm
Aug 23, 06:0023.5N 166.4E1006 mbTropical storm
Aug 23, 12:0024.2N 166.3E1004 mbTropical storm
Aug 23, 18:0024.5N 166.3E1002 mbTropical storm
Aug 24, 00:0024.9N 166.5E1000 mbTropical storm
Aug 24, 06:0025.6N 166.3E1000 mbTropical storm
Aug 24, 12:0027.7N 166.5E25 kt1000 mbTropical depression
Aug 24, 18:0028.2N 165.8E25 kt1000 mbTropical depression
Aug 25, 00:0028.7N 165.2E25 kt998 mbTropical depression
Aug 25, 06:0029.1N 164.7E30 kt996 mbTropical depression
Aug 25, 12:0029.9N 163.8E30 kt996 mbTropical depression
Aug 25, 18:0030.8N 162.9E996 mbTropical storm
Aug 26, 00:0032.2N 162.3E996 mbTropical storm
Aug 26, 06:0033.3N 162.2E996 mbTropical storm
Aug 26, 12:0034.3N 162.2E994 mbTropical storm
Aug 26, 18:0035.4N 162.3E994 mbTropical storm
Aug 27, 00:0036.3N 162.3E994 mbTropical storm
Aug 27, 06:0037.1N 162.4E994 mbTropical storm
Aug 27, 12:0037.8N 162.6E994 mbTropical storm
Aug 27, 18:0038.3N 162.6E994 mbTropical storm
Aug 28, 00:0038.6N 163.0E994 mbTropical storm
Aug 28, 06:0039.1N 163.7E992 mbTropical storm
Aug 28, 12:0039.6N 164.9E992 mbTropical storm
Aug 28, 18:0040.1N 166.3E992 mbTropical storm
Aug 29, 00:0040.7N 168.2E992 mbMixed
Aug 29, 06:0041.5N 170.9E992 mbExtratropical
Aug 29, 12:0042.8N 174.4E992 mbExtratropical
Aug 29, 18:0045.0N 178.0E988 mbExtratropical
Aug 30, 00:0047.8N 182.0EExtratropical

Other Western Pacific storms of 1971

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.