The 1991 season

Typhoon Amy (1991)

Typhoon Amy reached Category 4 in the Western Pacific between July 12, 1991 and July 20, 1991, with a lowest pressure of 930 mb, and made landfall. It killed 136 people, as Wikidata records it.

Radar

Reflectivity now over Typhoon Amy. Open it to see storms, cones and warnings on the map.

Open the live radar with storms, cones and warnings

Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.

The storm

Basin
Western Pacific
Dates
July 12, 1991 to July 20, 1991
Peak strength
Category 4, 125 kt (144 mph)
Lowest pressure
930 mb (27.46 inHg)
Landfall
Yes
Accumulated cyclone energy
11.9
Fastest the center moved
26 kt (30 mph)
Identifier
WP071991

Radar at PGUA as it neared land, Jul 13, 06:00 UTC

Deaths and damage

The sources count different things and are not added together.

Wikidata

136 deathsno damage figure

A community-maintained total, usually direct and indirect deaths together and damage worldwide. Joined to this storm by its IBTrACS serial, not by name.

Track

Time (UTC)PositionWindPressureStatus
Jul 12, 18:0011.2N 146.7E15 ktNot reported
Jul 13, 00:0011.2N 145.7E15 ktNot reported
Jul 13, 06:0011.2N 144.8E15 ktNot reported
Jul 13, 12:0011.2N 143.8E20 ktNot reported
Jul 13, 18:0011.2N 142.7E20 ktNot reported
Jul 14, 00:0011.3N 141.6E20 ktNot reported
Jul 14, 06:0011.5N 140.4E20 ktNot reported
Jul 14, 12:0011.9N 139.4E20 kt1008 mbTropical storm
Jul 14, 18:0012.4N 138.4E20 kt1008 mbTropical storm
Jul 15, 00:0013.0N 137.4E20 kt1008 mbTropical storm
Jul 15, 06:0013.5N 136.4E25 kt1006 mbTropical storm
Jul 15, 12:0014.0N 135.4E25 kt1006 mbTropical storm
Jul 15, 18:0014.6N 134.5E30 kt1004 mbTropical storm
Jul 16, 00:0015.4N 133.7E35 kt1002 mbTropical storm
Jul 16, 06:0016.2N 132.9E40 kt996 mbTropical storm
Jul 16, 12:0016.9N 131.9E45 kt990 mbTropical storm
Jul 16, 18:0017.3N 130.7E55 kt985 mbTropical storm
Jul 17, 00:0017.6N 129.6E60 kt980 mbTropical storm
Jul 17, 06:0017.9N 128.5E65 kt975 mbTropical storm
Jul 17, 12:0018.3N 127.4E75 kt970 mbTropical storm
Jul 17, 18:0018.7N 126.3E90 kt955 mbTropical storm
Jul 18, 00:0019.3N 125.1E105 kt940 mbTropical storm
Jul 18, 06:0019.8N 123.8E115 kt940 mbTropical storm
Jul 18, 12:0020.5N 122.4E125 kt935 mbTropical storm
Jul 18, 18:0021.4N 120.8E125 kt930 mbTropical storm
Jul 19, 00:0022.3N 119.0E120 kt940 mbTropical storm
Jul 19, 06:0023.0N 117.4E105 kt950 mbTropical storm
Jul 19, 12:0023.6N 116.0E75 kt970 mbTropical storm
Jul 19, 18:0024.1N 114.8E45 kt985 mbTropical storm
Jul 20, 00:0024.6N 113.6E35 kt996 mbTropical storm
Jul 20, 06:0025.1N 112.4E25 kt998 mbTropical storm
Jul 20, 12:0028.0N 110.0E998 mbTropical storm
Jul 20, 18:0029.0N 109.2E998 mbTropical storm

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.