Cyclone Alison:Krisostoma (1986)

Basin

South Indian

Dates

April 4, 1986 to April 14, 1986

Peak strength

Category 1, 75 kt (86 mph)

Lowest pressure

974 mb (28.76 inHg)

Landfall

No; closest approach 446 km (277 mi)

Accumulated cyclone energy

6.9

Identifier

SH281986

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.

• Unnamed tropical stormSouth Indian · 1986Tropical Storm40 kt
• Cyclone NicholasSouth Indian · 1986Cat 175 kt · 945 mb
• Tropical Storm AlifredySouth Indian · 1986Tropical Storm36 kt · 997 mb
• Tropical Storm BerobiaSouth Indian · 1986Tropical Storm50 kt · 984 mb
• Cyclone DelifinaSouth Indian · 1986Cat 3110 kt · 976 mb
• Tropical Storm OpheliaSouth Indian · 1986Tropical Storm40 kt · 986 mb
• Cyclone CostaSouth Indian · 1986Cat 170 kt · 976 mb
• Unnamed tropical depressionSouth Indian · 1986Tropical Depression
• Unnamed tropical stormSouth Indian · 1986Tropical Storm35 kt
• Tropical Storm HectorSouth Indian · 1986Tropical Storm45 kt · 982 mb
• Tropical Storm PanchoSouth Indian · 1986Tropical Storm55 kt · 976 mb
• Cyclone ErinestaSouth Indian · 1986Cat 4115 kt · 927 mb
• Tropical Storm FilomenaSouth Indian · 1986Tropical Storm55 kt · 991 mb
• Tropical Storm RhondaSouth Indian · 1986Tropical Storm50 kt · 968 mb
• Cyclone GistaSouth Indian · 1986Cat 285 kt · 976 mb
• Tropical Storm SelwynSouth Indian · 1986Tropical Storm50 kt · 980 mb
• Tropical Storm TiffanySouth Indian · 1986Tropical Storm35 kt · 984 mb
• Cyclone VictorSouth Indian · 1986Cat 3105 kt · 930 mb
• Cyclone HonorininaSouth Indian · 1986Cat 3110 kt · 941 mb
• Tropical Storm IarimaSouth Indian · 1986Tropical Storm36 kt · 991 mb
• Cyclone JefotraSouth Indian · 1986Cat 3105 kt · 954 mb
• Tropical Depression KrisostomaSouth Indian · 1986Tropical Depression
• Cyclone Billy:LilaSouth Indian · 1986Cat 295 kt · 950 mb
• Tropical Depression LilaSouth Indian · 1986Tropical Depression
• Tropical Depression LilaSouth Indian · 1986Tropical Depression

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.