Tropical Storm Viola (1975)

Basin

Western Pacific

Dates

September 4, 1975 to September 8, 1975

Peak strength

Tropical Storm, 45 kt (52 mph)

Lowest pressure

996 mb (29.41 inHg)

Landfall

No; closest approach 626 km (389 mi)

Accumulated cyclone energy

0.9

Identifier

WP111975

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.

• Typhoon LolaWestern Pacific · 1975Cat 170 kt · 975 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression25 kt
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Tropical Storm MamieWestern Pacific · 1975Tropical Storm40 kt · 992 mb
• Super Typhoon NinaWestern Pacific · 1975Cat 4135 kt · 900 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression30 kt
• Typhoon OraWestern Pacific · 1975Cat 165 kt · 970 mb
• Typhoon RitaWestern Pacific · 1975Cat 180 kt · 965 mb
• Typhoon PhyllisWestern Pacific · 1975 · 77 deathsCat 4120 kt · 920 mb
• Tropical Depression RitaWestern Pacific · 1975Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Tropical Storm SusanWestern Pacific · 1975Tropical Storm50 kt · 985 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Typhoon TessWestern Pacific · 1975Cat 295 kt · 945 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression
• Typhoon WinnieWestern Pacific · 1975Cat 165 kt · 980 mb
• Typhoon AliceWestern Pacific · 1975Cat 175 kt · 970 mb
• Typhoon BettyWestern Pacific · 1975Cat 295 kt · 950 mb
• Typhoon CoraWestern Pacific · 1975Cat 3105 kt · 945 mb
• Tropical Storm DorisWestern Pacific · 1975Tropical Storm55 kt · 985 mb
• Super Typhoon ElsieWestern Pacific · 1975Cat 4135 kt · 900 mb
• Typhoon FlossieWestern Pacific · 1975Cat 170 kt · 970 mb
• Tropical Depression FlossieWestern Pacific · 1975Tropical Depression
• Tropical Depression FlossieWestern Pacific · 1975Tropical Depression998 mb
• Tropical Storm GraceWestern Pacific · 1975Tropical Storm60 kt · 985 mb
• Tropical Storm HelenWestern Pacific · 1975Tropical Storm45 kt · 1000 mb
• Typhoon IdaWestern Pacific · 1975Cat 285 kt · 950 mb
• Super Typhoon JuneWestern Pacific · 1975Cat 5160 kt · 875 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression30 kt · 996 mb
• Unnamed tropical depressionWestern Pacific · 1975Tropical Depression30 kt

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.