The 1970 season

Unnamed tropical depression (1970)

Unnamed tropical depression peaked at unknown kt in the Western Pacific between July 27, 1970 and August 1, 1970, with a lowest pressure of 994 mb.

Track and intensity

The whole track of Unnamed tropical depression, 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.

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The storm

Basin
Western Pacific
Dates
July 27, 1970 to August 1, 1970
Peak strength
Tropical Depression
Lowest pressure
994 mb (29.35 inHg)
Landfall
No; closest approach 53 km (33 mi)
Accumulated cyclone energy
0.0
Identifier
WP251970

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
Jul 27, 18:0025.3N 140.0ETropical storm
Jul 28, 00:0025.9N 137.7E1006 mbTropical storm
Jul 28, 06:0026.2N 136.3E1004 mbTropical depression
Jul 28, 12:0026.4N 134.7E1006 mbTropical depression
Jul 28, 18:0026.6N 133.6E1006 mbTropical depression
Jul 29, 00:0027.6N 133.5E1006 mbTropical depression
Jul 29, 06:0028.1N 132.5E1006 mbTropical depression
Jul 29, 12:0028.3N 131.3E1004 mbTropical depression
Jul 29, 18:0028.5N 131.0E1004 mbTropical depression
Jul 30, 00:0029.0N 130.9E1000 mbTropical depression
Jul 30, 06:0030.1N 130.6E994 mbTropical depression
Jul 30, 12:0030.7N 130.5E1004 mbTropical depression
Jul 30, 18:0030.8N 130.1E1008 mbTropical depression
Jul 31, 00:0030.2N 129.1E1006 mbTropical depression
Jul 31, 06:0031.0N 128.4E1006 mbTropical storm
Jul 31, 12:0031.7N 128.3E1008 mbTropical storm
Jul 31, 18:0032.5N 128.2E1008 mbTropical storm
Aug 1, 00:0033.1N 128.1E1008 mbTropical storm
Aug 1, 06:0033.8N 128.1E1010 mbTropical storm
Aug 1, 12:0034.0N 128.3E1010 mbExtratropical
Aug 1, 18:0034.2N 129.0E1010 mbExtratropical

Other Western Pacific 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.