Tropical Storm Irma (1960)

Basin

Western Pacific

Dates

September 9, 1960 to September 20, 1960

Peak strength

Tropical Storm, 40 kt (46 mph)

Landfall

No; closest approach 79 km (49 mi)

Accumulated cyclone energy

1.1

Identifier

WP201960

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 Depression IvyWestern Pacific · 1960Tropical Depression
• Tropical Depression JeanWestern Pacific · 1960Tropical Depression
• Typhoon KarenWestern Pacific · 1960Cat 175 kt · 990 mb
• Tropical Storm LucilleWestern Pacific · 1960Tropical Storm45 kt · 985 mb
• Tropical Depression LucilleWestern Pacific · 1960Tropical Depression
• Tropical Storm NadineWestern Pacific · 1960Tropical Storm60 kt · 985 mb
• Typhoon MaryWestern Pacific · 1960Cat 180 kt · 980 mb
• Tropical Depression MaryWestern Pacific · 1960Tropical Depression992 mb
• Typhoon OliveWestern Pacific · 1960Cat 4125 kt · 950 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Typhoon PollyWestern Pacific · 1960Cat 4115 kt · 950 mb
• Tropical Storm RoseWestern Pacific · 1960Tropical Storm40 kt · 990 mb
• Super Typhoon ShirleyWestern Pacific · 1960Cat 4135 kt · 910 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Typhoon TrixWestern Pacific · 1960Cat 4125 kt · 930 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression1000 mb
• Typhoon VirginiaWestern Pacific · 1960Cat 285 kt · 980 mb
• Tropical Depression TrixWestern Pacific · 1960Tropical Depression
• Tropical Storm AgnesWestern Pacific · 1960Tropical Storm50 kt · 994 mb
• Typhoon WendyWestern Pacific · 1960Cat 175 kt · 990 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Typhoon BessWestern Pacific · 1960Cat 165 kt · 980 mb
• Typhoon CarmenWestern Pacific · 1960Cat 175 kt · 975 mb
• Typhoon DellaWestern Pacific · 1960Cat 295 kt · 970 mb
• Typhoon ElaineWestern Pacific · 1960Cat 175 kt · 975 mb
• Typhoon FayeWestern Pacific · 1960Cat 4125 kt · 945 mb
• Tropical Storm GloriaWestern Pacific · 1960Tropical Storm45 kt
• Tropical Depression GloriaWestern Pacific · 1960Tropical Depression1008 mb
• Tropical Storm HesterWestern Pacific · 1960Tropical Storm40 kt · 1000 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Tropical Depression IrmaWestern Pacific · 1960Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Tropical Storm JudyWestern Pacific · 1960Tropical Storm40 kt · 980 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Typhoon KitWestern Pacific · 1960Cat 290 kt · 960 mb
• Typhoon LolaWestern Pacific · 1960Cat 180 kt · 970 mb
• Typhoon MamieWestern Pacific · 1960Cat 4115 kt · 940 mb
• Typhoon NinaWestern Pacific · 1960Cat 3110 kt · 950 mb
• Tropical Depression MamieWestern Pacific · 1960Tropical Depression990 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Super Typhoon OpheliaWestern Pacific · 1960Cat 4135 kt · 925 mb
• Unnamed tropical depressionWestern Pacific · 1960Tropical Depression
• Typhoon PhyllisWestern Pacific · 1960Cat 3105 kt · 965 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.