The 1991 season

Typhoon Pat (1991)

Typhoon Pat reached Category 4 in the Western Pacific between October 1, 1991 and October 14, 1991, with a lowest pressure of 925 mb.

Track and intensity

The whole track of Typhoon Pat, colored by strength, with the other storms of the 1991 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
October 1, 1991 to October 14, 1991
Peak strength
Category 4, 125 kt (144 mph)
Lowest pressure
925 mb (27.32 inHg)
Landfall
No; closest approach 664 km (413 mi)
Accumulated cyclone energy
23.3
Identifier
WP241991

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
Oct 1, 00:008.0N 164.0E15 ktNot reported
Oct 1, 06:008.3N 163.8E15 ktNot reported
Oct 1, 12:008.6N 163.7E15 ktNot reported
Oct 1, 18:008.8N 163.6E15 ktNot reported
Oct 2, 00:009.1N 163.4E15 ktNot reported
Oct 2, 06:009.4N 163.3E15 ktNot reported
Oct 2, 12:009.7N 163.2E15 ktNot reported
Oct 2, 18:0010.1N 163.1E15 ktNot reported
Oct 3, 00:0010.6N 162.9E15 ktNot reported
Oct 3, 06:0011.1N 162.8E20 ktNot reported
Oct 3, 12:0011.7N 162.7E20 ktNot reported
Oct 3, 18:0012.5N 162.5E25 ktNot reported
Oct 4, 00:0013.2N 162.1E25 ktNot reported
Oct 4, 06:0013.7N 161.7E25 kt1004 mbTropical storm
Oct 4, 12:0014.0N 160.9E30 kt1004 mbTropical storm
Oct 4, 18:0014.3N 160.0E30 kt1002 mbTropical storm
Oct 5, 00:0014.7N 159.0E30 kt1000 mbTropical storm
Oct 5, 06:0015.1N 157.8E35 kt1000 mbTropical storm
Oct 5, 12:0015.3N 156.7E35 kt1000 mbTropical storm
Oct 5, 18:0015.4N 155.6E40 kt998 mbTropical storm
Oct 6, 00:0015.4N 154.6E45 kt994 mbTropical storm
Oct 6, 06:0015.6N 153.5E50 kt990 mbTropical storm
Oct 6, 12:0015.7N 152.6E55 kt985 mbTropical storm
Oct 6, 18:0016.0N 152.1E60 kt980 mbTropical storm
Oct 7, 00:0016.2N 151.9E70 kt975 mbTropical storm
Oct 7, 06:0016.5N 151.6E80 kt970 mbTropical storm
Oct 7, 12:0016.9N 151.4E95 kt965 mbTropical storm
Oct 7, 18:0017.4N 151.2E110 kt955 mbTropical storm
Oct 8, 00:0017.9N 151.2E120 kt945 mbTropical storm
Oct 8, 06:0018.4N 151.2E125 kt940 mbTropical storm
Oct 8, 12:0019.0N 151.1E125 kt940 mbTropical storm
Oct 8, 18:0019.6N 150.9E120 kt935 mbTropical storm
Oct 9, 00:0020.2N 150.6E115 kt925 mbTropical storm
Oct 9, 06:0020.8N 150.3E110 kt925 mbTropical storm
Oct 9, 12:0021.3N 150.0E105 kt925 mbTropical storm
Oct 9, 18:0021.8N 149.8E100 kt930 mbTropical storm
Oct 10, 00:0022.3N 149.7E100 kt930 mbTropical storm
Oct 10, 06:0022.8N 149.7E95 kt935 mbTropical storm
Oct 10, 12:0023.5N 149.9E90 kt940 mbTropical storm
Oct 10, 18:0024.2N 150.2E85 kt950 mbTropical storm
Oct 11, 00:0025.1N 150.6E80 kt960 mbTropical storm
Oct 11, 06:0026.3N 151.2E75 kt960 mbTropical storm
Oct 11, 12:0027.7N 151.5E75 kt965 mbTropical storm
Oct 11, 18:0029.5N 151.5E70 kt965 mbTropical storm
Oct 12, 00:0031.5N 151.6E65 kt965 mbTropical storm
Oct 12, 06:0033.7N 152.0E65 kt965 mbTropical storm
Oct 12, 12:0035.8N 152.8E60 kt965 mbTropical storm
Oct 12, 18:0038.0N 153.9E55 kt970 mbTropical storm
Oct 13, 00:0040.3N 155.4E55 kt975 mbTropical storm
Oct 13, 06:0042.5N 157.0E60 kt980 mbMixed
Oct 13, 12:0044.1N 159.0E986 mbExtratropical
Oct 13, 18:0045.6N 162.0E986 mbExtratropical
Oct 14, 00:0046.7N 164.3E988 mbExtratropical
Oct 14, 06:0048.0N 166.0E988 mbExtratropical

Other Western Pacific storms of 1991

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.