Typhoon Helen (1972)

Basin

Western Pacific

Dates

September 10, 1972 to September 21, 1972

Peak strength

Category 3, 100 kt (115 mph)

Lowest pressure

955 mb (28.20 inHg)

Landfall

Yes

Accumulated cyclone energy

9.4

Fastest the center moved

30 kt (35 mph)

Identifier

WP201972

The sources count different things and are not added together.

• Typhoon KitWestern Pacific · 1972Cat 4120 kt · 940 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression30 kt
• Typhoon LolaWestern Pacific · 1972Cat 3105 kt · 955 mb
• Tropical Storm NinaWestern Pacific · 1972Tropical Storm45 kt · 996 mb
• Tropical Storm MamieWestern Pacific · 1972Tropical Storm50 kt · 990 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression
• Typhoon OraWestern Pacific · 1972Cat 180 kt · 980 mb
• Typhoon PhyllisWestern Pacific · 1972Cat 4120 kt · 945 mb
• Super Typhoon RitaWestern Pacific · 1972Cat 5145 kt · 910 mb
• Typhoon SusanWestern Pacific · 1972Cat 165 kt · 980 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression
• Typhoon TessWestern Pacific · 1972Cat 4125 kt · 940 mb
• Tropical Storm ViolaWestern Pacific · 1972Tropical Storm60 kt · 975 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression990 mb
• Tropical Storm WinnieWestern Pacific · 1972Tropical Storm60 kt · 990 mb
• Typhoon AliceWestern Pacific · 1972Cat 290 kt · 965 mb
• Super Typhoon BettyWestern Pacific · 1972Cat 4135 kt · 910 mb
• Typhoon CoraWestern Pacific · 1972Cat 165 kt · 975 mb
• Tropical Storm DorisWestern Pacific · 1972Tropical Storm55 kt · 985 mb
• Tropical Depression DorisWestern Pacific · 1972Tropical Depression992 mb
• Typhoon ElsieWestern Pacific · 1972Cat 175 kt · 975 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression
• Typhoon FlossieWestern Pacific · 1972Cat 175 kt · 975 mb
• Tropical Storm GraceWestern Pacific · 1972Tropical Storm50 kt · 990 mb
• Unnamed tropical depressionWestern Pacific · 1972Tropical Depression30 kt
• Typhoon IdaWestern Pacific · 1972Cat 3110 kt · 930 mb
• Typhoon LornaWestern Pacific · 1972Cat 175 kt · 990 mb
• Tropical Storm KathyWestern Pacific · 1972Tropical Storm60 kt · 980 mb
• Typhoon MarieWestern Pacific · 1972Cat 4115 kt · 935 mb
• Typhoon NancyWestern Pacific · 1972Cat 3105 kt · 945 mb
• Typhoon OlgaWestern Pacific · 1972Cat 3105 kt · 940 mb
• Typhoon PamelaWestern Pacific · 1972Cat 3110 kt · 940 mb
• Tropical Depression PamelaWestern Pacific · 1972Tropical Depression
• Typhoon ThereseWestern Pacific · 1972Cat 3105 kt · 945 mb
• Typhoon SallyWestern Pacific · 1972Cat 180 kt · 985 mb
• Tropical Storm VioletWestern Pacific · 1972Tropical Storm55 kt · 995 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.

• Wikipedia article: Typhoon Helen