The 1975 season

Tropical Storm Susan (1975)

Tropical Storm Susan peaked at 50 kt in the Western Pacific between August 25, 1975 and September 3, 1975, with a lowest pressure of 985 mb.

Track and intensity

The whole track of Tropical Storm Susan, colored by strength, with the other storms of the 1975 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 25, 1975 to September 3, 1975
Peak strength
Tropical Storm, 50 kt (58 mph)
Lowest pressure
985 mb (29.09 inHg)
Landfall
No; closest approach 495 km (308 mi)
Accumulated cyclone energy
2.1
Identifier
WP091975

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 25, 00:0023.4N 153.6E25 ktTropical storm
Aug 25, 06:0023.8N 153.5E25 kt1006 mbTropical storm
Aug 25, 12:0024.2N 153.3E25 kt1006 mbTropical storm
Aug 25, 18:0024.6N 153.1E25 kt1002 mbMixed
Aug 26, 00:0025.0N 153.0E30 kt1002 mbMixed
Aug 26, 06:0025.4N 153.2E30 kt998 mbTropical storm
Aug 26, 12:0026.1N 153.4E30 kt1000 mbTropical storm
Aug 26, 18:0027.0N 153.2E30 kt1000 mbTropical storm
Aug 27, 00:0028.1N 152.8E30 kt1000 mbTropical storm
Aug 27, 06:0029.4N 152.3E30 kt1000 mbTropical storm
Aug 27, 12:0030.5N 151.8E30 kt1002 mbMixed
Aug 27, 18:0031.4N 151.7E30 kt1002 mbMixed
Aug 28, 00:0032.2N 151.6E30 kt1002 mbMixed
Aug 28, 06:0033.0N 151.8E30 kt1000 mbMixed
Aug 28, 12:0033.7N 152.1E30 kt998 mbTropical storm
Aug 28, 18:0034.5N 152.5E30 kt996 mbTropical storm
Aug 29, 00:0035.2N 153.0E35 kt994 mbTropical storm
Aug 29, 06:0035.8N 154.1E40 kt994 mbTropical storm
Aug 29, 12:0036.3N 155.3E45 kt994 mbTropical storm
Aug 29, 18:0036.7N 156.3E50 kt994 mbTropical storm
Aug 30, 00:0036.9N 157.3E50 kt990 mbTropical storm
Aug 30, 06:0037.0N 158.2E50 kt985 mbTropical storm
Aug 30, 12:0037.3N 158.8E45 kt985 mbTropical storm
Aug 30, 18:0037.7N 159.1E40 kt985 mbTropical storm
Aug 31, 00:0038.3N 159.2E40 kt985 mbTropical storm
Aug 31, 06:0038.7N 159.0E35 kt985 mbTropical storm
Aug 31, 12:0039.0N 158.6E35 kt985 mbTropical storm
Aug 31, 18:0039.4N 158.1E35 kt990 mbTropical storm
Sep 1, 00:0039.9N 157.7E30 kt992 mbTropical storm
Sep 1, 06:0040.4N 157.3E30 kt992 mbTropical storm
Sep 1, 12:0041.0N 156.9E30 kt994 mbTropical storm
Sep 1, 18:0041.3N 156.7E30 kt994 mbTropical storm
Sep 2, 00:0041.5N 156.6E30 kt996 mbTropical storm
Sep 2, 06:0041.7N 156.6E30 kt1000 mbTropical storm
Sep 2, 12:0042.0N 156.7E30 kt1004 mbTropical storm
Sep 2, 18:0042.4N 157.2E30 kt1008 mbTropical storm
Sep 3, 00:0043.0N 158.0E30 kt1012 mbMixed
Sep 3, 06:0043.7N 158.5E30 kt1012 mbMixed
Sep 3, 12:0044.4N 159.0E30 kt1012 mbMixed
Sep 3, 18:0044.8N 156.5E1012 mbMixed

Other Western Pacific storms of 1975

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.