Hurricane History Map

2011 South-West Indian season

15 storms formed in the South-West Indian basin in 2011, from 25 October 2010 to 18 April 2011.

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Years2011
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 2011 season in numbers

The record holds 15 storms for the 2011 South-West Indian season, of which 9 had names.15 reached tropical storm strength (34 knots or more), 5 reached cyclone strength (category 1 or more) and 1 were major (category 3 or more).

  • 15storms
  • 15tropical storm strength or more
  • 5cyclone strength or more
  • 1major (category 3 to 5)
  • 59accumulated 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 2011

  • Bingiza (2011)6 February 2011 to 21 February 2011, peak Category 3 (100 kt), 957 hPa
  • Bianca (2011)21 January 2011 to 30 January 2011, peak Category 2 (95 kt), 949 hPa
  • Abele (2011)26 November 2010 to 5 December 2010, peak Category 1 (80 kt), 974 hPa
  • Dianne (2011)14 February 2011 to 23 February 2011, peak Category 1 (80 kt), 960 hPa
  • Carlos (2011)14 February 2011 to 27 February 2011, peak Category 1 (65 kt), 969 hPa

All 15 storms of 2011

StormPeak
Unnamed storm Tropical storm
Anggrek Tropical storm
Abele Category 1
Unnamed storm Tropical storm
Unnamed storm Tropical storm
Vince Tropical storm
Bianca Category 2
Bingiza Category 3
Unnamed storm Tropical storm
Carlos Category 1
Dianne Category 1
Cherono Tropical storm
Unnamed storm Tropical storm
Unnamed storm Tropical storm
Errol Tropical storm

← 2010 · 2012 → · All seasons

Other basins in 2011

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