Hurricane History Map

1991 South-West Indian season

16 storms formed in the South-West Indian basin in 1991, from 19 September 1990 to 16 June 1991.

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Years1991
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 1991 season in numbers

The record holds 16 storms for the 1991 South-West Indian season, of which 12 had names.13 reached tropical storm strength (34 knots or more), 6 reached cyclone strength (category 1 or more) and 2 were major (category 3 or more).

  • 16storms
  • 13tropical storm strength or more
  • 6cyclone strength or more
  • 2major (category 3 to 5)
  • 106accumulated 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 1991

  • Bella (1991)13 January 1991 to 4 February 1991, peak Category 4 (130 kt), 936 hPa
  • Errol (1991)23 March 1991 to 31 March 1991, peak Category 3 (110 kt), 950 hPa
  • Marian (1991)8 April 1991 to 19 April 1991, peak Category 2 (95 kt), 930 hPa
  • Debra (1991)22 February 1991 to 4 March 1991, peak Category 2 (90 kt), 966 hPa
  • Fatima (1991)20 March 1991 to 2 April 1991, peak Category 2 (90 kt), 954 hPa

All 16 storms of 1991

StormPeak
Unnamed storm Tropical depression
Unnamed storm Tropical depression
Unnamed storm Tropical storm
Laurence Tropical storm
Alison Category 1
Bella Category 4
Chris Tropical storm
Cynthia Tropical storm
Debra Category 2
Elma Tropical storm
Fatima Category 2
Errol Category 3
Unnamed storm Tropical depression
Marian Category 2
Fifi Tropical storm
Gritelle Tropical storm

← 1990 · 1992 → · All seasons

Other basins in 1991

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