Typhoon Ivy (1991)

Basin

Western Pacific

Dates

August 31, 1991 to September 12, 1991

Peak strength

Category 4, 115 kt (132 mph)

Lowest pressure

935 mb (27.61 inHg)

Landfall

No; closest approach 225 km (140 mi)

Accumulated cyclone energy

20.1

Identifier

WP171991

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.

• Tropical Storm SharonWestern Pacific · 1991Tropical Storm60 kt · 985 mb
• Typhoon TimWestern Pacific · 1991Cat 170 kt · 970 mb
• Tropical Storm VanessaWestern Pacific · 1991Tropical Storm45 kt · 994 mb
• Super Typhoon WaltWestern Pacific · 1991Cat 5140 kt · 915 mb
• Typhoon YunyaWestern Pacific · 1991Cat 3105 kt · 950 mb
• Unnamed tropical depressionWestern Pacific · 1991Tropical Depression
• Typhoon ZekeWestern Pacific · 1991Cat 180 kt · 970 mb
• Typhoon AmyWestern Pacific · 1991 · 136 deathsCat 4125 kt · 930 mb
• Typhoon BrendanWestern Pacific · 1991Cat 170 kt · 980 mb
• Typhoon CaitlinWestern Pacific · 1991Cat 295 kt · 940 mb
• Tropical Depression BrendanWestern Pacific · 1991Tropical Depression
• Tropical Storm DougWestern Pacific · 1991Tropical Storm35 kt
• Typhoon FredWestern Pacific · 1991Cat 295 kt · 960 mb
• Typhoon EllieWestern Pacific · 1991Cat 285 kt · 960 mb
• Unnamed tropical depressionWestern Pacific · 1991Tropical Depression25 kt
• Typhoon GladysWestern Pacific · 1991Cat 165 kt · 965 mb
• Unnamed tropical depressionWestern Pacific · 1991Tropical Depression30 kt · 992 mb
• Tropical Storm HarryWestern Pacific · 1991Tropical Storm40 kt · 984 mb
• Tropical Storm JoelWestern Pacific · 1991Tropical Storm55 kt · 985 mb
• Typhoon KinnaWestern Pacific · 1991Cat 290 kt · 955 mb
• Super Typhoon MireilleWestern Pacific · 1991Cat 4130 kt · 925 mb
• Tropical Storm LukeWestern Pacific · 1991Tropical Storm55 kt · 972 mb
• Typhoon NatWestern Pacific · 1991Cat 3110 kt · 950 mb
• Typhoon PatWestern Pacific · 1991Cat 4125 kt · 925 mb
• Typhoon OrchidWestern Pacific · 1991Cat 4115 kt · 930 mb
• Super Typhoon RuthWestern Pacific · 1991Cat 5145 kt · 895 mb
• Unnamed tropical depressionWestern Pacific · 1991Tropical Depression25 kt
• Super Typhoon SethWestern Pacific · 1991Cat 4130 kt · 925 mb
• Tropical Storm ThelmaWestern Pacific · 1991Tropical Storm45 kt · 992 mb
• Tropical Storm VerneWestern Pacific · 1991Tropical Storm55 kt · 980 mb
• Tropical Storm WildaWestern Pacific · 1991Tropical Storm45 kt · 992 mb
• Super Typhoon YuriWestern Pacific · 1991Cat 5150 kt · 895 mb

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.

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.