Hurricane History Map

1990 South-West Indian season

22 storms formed in the South-West Indian basin in 1990, from 7 July 1989 to 23 May 1990.

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Years1990
Ocean basin

Choosing a minimum category hides storms with no wind speed in the record. To see which storms have passed near you, search a town or ZIP code, or tap the map.

Key
  • Tropical depression Winds below 34 knots (39 mph)
  • Tropical storm 34 to 63 knots (39 to 73 mph)
  • Category 1 64 to 82 knots (74 to 95 mph)
  • Category 2 83 to 95 knots (96 to 110 mph)
  • Category 3 96 to 112 knots (111 to 129 mph), major
  • Category 4 113 to 136 knots (130 to 156 mph), major
  • Category 5 137 knots (157 mph) or more, major
  • Unknown intensity No wind speed in the record
  • Post-tropical Storm has become post-tropical (dashed line)

How to read the lines. Each line is the track of one storm, drawn through its six-hourly positions and coloured by its intensity at each point (the Saffir-Simpson scale), so a line changes colour as the storm strengthens or weakens. Tap a line for its details, or tap anywhere else to see which storms have passed nearby. Weaker storms appear as you zoom in. Hurricanes, typhoons and cyclones are the same kind of storm with different names in different oceans.

The 1990 season in numbers

The record holds 22 storms for the 1990 South-West Indian season, of which 17 had names.19 reached tropical storm strength (34 knots or more), 9 reached cyclone strength (category 1 or more) and 4 were major (category 3 or more).

  • 22storms
  • 19tropical storm strength or more
  • 9cyclone strength or more
  • 4major (category 3 to 5)
  • 169accumulated cyclone energy

Accumulated cyclone energy adds up the squared wind speed of every position of 34 knots or more, divided by 10,000. It is approximate here because the winds are 1-minute equivalents, and it is mostly useful for comparing seasons of one basin.

Strongest storms of 1990

  • Alibera (1990)14 December 1989 to 7 January 1990, peak Category 4 (135 kt), 954 hPa
  • Alex (1990)14 March 1990 to 26 March 1990, peak Category 4 (130 kt), 927 hPa
  • Gregoara:walter (1990)3 March 1990 to 27 March 1990, peak Category 3 (110 kt), 927 hPa
  • Edisoana (1990)26 February 1990 to 8 March 1990, peak Category 3 (100 kt), 954 hPa
  • Dety (1990)30 January 1990 to 11 February 1990, peak Category 2 (95 kt), 954 hPa

All 22 storms of 1990

StormPeak
Unnamed storm Tropical depression
Unnamed storm Tropical storm
Unnamed storm Tropical depression
Unnamed storm Tropical depression
Unnamed storm Tropical storm
Pedro Category 1
Felicity Tropical storm
Alibera Category 4
Baomavo Category 2
Rosita Tropical storm
Sam Tropical storm
Tina Tropical storm
Dety Category 2
Cezera Category 1
Vincent Category 1
Edisoana Category 3
Gregoara:walter Category 3
Felana Tropical storm
Alex Category 4
Hanta Tropical storm
Bessi Tropical storm
Ikonjo Tropical storm

← 1989 · 1991 → · All seasons

Other basins in 1990

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