The 1991 season

Super Typhoon Ruth (1991)

Super Typhoon Ruth reached Category 5 in the Western Pacific between October 16, 1991 and November 3, 1991, with a lowest pressure of 895 mb, and made landfall.

Track and intensity

The whole track of Super Typhoon Ruth, 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 16, 1991 to November 3, 1991
Peak strength
Category 5, 145 kt (167 mph)
Lowest pressure
895 mb (26.43 inHg)
Landfall
Yes
Accumulated cyclone energy
35.9
Fastest the center moved
38 kt (44 mph)
Identifier
WP251991

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 16, 00:006.0N 156.0E15 ktNot reported
Oct 16, 06:006.0N 155.0E15 ktNot reported
Oct 16, 12:006.0N 154.0E15 ktNot reported
Oct 16, 18:006.1N 153.0E15 ktNot reported
Oct 17, 00:006.2N 152.0E20 ktNot reported
Oct 17, 06:006.3N 151.1E20 ktNot reported
Oct 17, 12:006.4N 150.3E20 ktNot reported
Oct 17, 18:006.5N 149.6E20 ktNot reported
Oct 18, 00:006.7N 148.9E20 ktNot reported
Oct 18, 06:006.9N 148.3E20 ktNot reported
Oct 18, 12:007.1N 147.7E20 ktNot reported
Oct 18, 18:007.3N 147.1E20 ktNot reported
Oct 19, 00:007.5N 146.6E25 ktNot reported
Oct 19, 06:007.8N 146.1E25 ktNot reported
Oct 19, 12:008.2N 145.5E25 kt1004 mbTropical storm
Oct 19, 18:008.6N 145.0E25 kt1004 mbTropical storm
Oct 20, 00:009.0N 144.6E25 kt1004 mbTropical storm
Oct 20, 06:009.5N 144.3E25 kt1002 mbTropical storm
Oct 20, 12:009.9N 143.9E30 kt1002 mbTropical storm
Oct 20, 18:0010.4N 143.5E30 kt1002 mbTropical storm
Oct 21, 00:0010.9N 143.1E35 kt1000 mbTropical storm
Oct 21, 06:0011.3N 142.7E40 kt996 mbTropical storm
Oct 21, 12:0011.7N 142.4E45 kt994 mbTropical storm
Oct 21, 18:0012.0N 142.0E50 kt992 mbTropical storm
Oct 22, 00:0012.4N 141.6E55 kt985 mbTropical storm
Oct 22, 06:0012.9N 141.2E60 kt980 mbTropical storm
Oct 22, 12:0013.4N 140.7E70 kt970 mbTropical storm
Oct 22, 18:0013.8N 139.9E80 kt960 mbTropical storm
Oct 23, 00:0014.0N 139.0E95 kt945 mbTropical storm
Oct 23, 06:0014.2N 138.1E110 kt935 mbTropical storm
Oct 23, 12:0014.3N 137.2E125 kt925 mbTropical storm
Oct 23, 18:0014.4N 136.3E135 kt915 mbTropical storm
Oct 24, 00:0014.5N 135.3E140 kt905 mbTropical storm
Oct 24, 06:0014.7N 134.3E145 kt900 mbTropical storm
Oct 24, 12:0015.0N 133.3E145 kt895 mbTropical storm
Oct 24, 18:0015.3N 132.3E140 kt895 mbTropical storm
Oct 25, 00:0015.7N 131.3E140 kt900 mbTropical storm
Oct 25, 06:0016.0N 130.3E140 kt905 mbTropical storm
Oct 25, 12:0016.5N 129.4E135 kt905 mbTropical storm
Oct 25, 18:0017.0N 128.5E130 kt905 mbTropical storm
Oct 26, 00:0017.5N 127.6E130 kt905 mbTropical storm
Oct 26, 06:0017.9N 126.6E125 kt910 mbTropical storm
Oct 26, 12:0018.2N 125.6E120 kt915 mbTropical storm
Oct 26, 18:0018.5N 124.6E115 kt920 mbTropical storm
Oct 27, 00:0018.5N 123.6E110 kt930 mbTropical storm
Oct 27, 06:0018.2N 122.8E105 kt935 mbTropical storm
Oct 27, 12:0018.0N 122.1E100 kt940 mbTropical storm
Oct 27, 18:0017.8N 121.5E85 kt950 mbTropical storm
Oct 28, 00:0017.8N 121.1E70 kt960 mbTropical storm
Oct 28, 06:0017.9N 120.7E65 kt970 mbTropical storm
Oct 28, 12:0018.1N 120.3E60 kt975 mbTropical storm
Oct 28, 18:0018.5N 120.1E55 kt980 mbTropical storm
Oct 29, 00:0018.9N 120.0E50 kt980 mbTropical storm
Oct 29, 06:0019.4N 120.0E45 kt985 mbTropical storm
Oct 29, 12:0019.8N 120.3E40 kt990 mbTropical storm
Oct 29, 18:0020.2N 120.7E35 kt992 mbTropical storm
Oct 30, 00:0020.6N 121.3E30 kt996 mbTropical storm
Oct 30, 06:0021.0N 122.3E30 kt998 mbTropical storm
Oct 30, 12:0021.5N 123.6E30 kt1000 mbTropical storm
Oct 30, 18:0022.4N 125.0E30 kt1000 mbMixed
Oct 31, 00:0023.2N 126.2E25 kt1002 mbExtratropical
Oct 31, 06:0023.5N 127.5E25 kt1002 mbExtratropical
Oct 31, 12:0026.5N 132.3E1002 mbExtratropical
Oct 31, 18:0027.7N 135.3E1004 mbExtratropical
Nov 1, 00:0030.0N 138.8E1004 mbExtratropical
Nov 1, 06:0031.5N 141.5E1004 mbExtratropical
Nov 1, 12:0032.6N 143.7E1004 mbExtratropical
Nov 1, 18:0033.2N 146.1E1004 mbExtratropical
Nov 2, 00:0034.0N 149.0E1006 mbExtratropical
Nov 2, 06:0034.2N 151.5E1006 mbExtratropical
Nov 2, 12:0034.2N 154.5E1006 mbExtratropical
Nov 2, 18:0034.0N 157.3E1006 mbExtratropical
Nov 3, 00:0033.5N 159.5E1010 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.