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Timeline of the 2009–10 South-West Indian Ocean cyclone season
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This timeline documents all of the events of the 2009–10 South-West Indian Ocean cyclone season which is the period that tropical cyclones formed in the Indian Ocean. Within the Indian Ocean most tropical cyclones form within the cyclone season which began on November 1 and will end on April 30. The scope of this article is limited to tropical cyclones that form in the Indian Ocean 30°E and 90°E to the south of the equator. When a zone of disturbed weather form or moves into the South-West Indian Ocean it is assigned a number and monitored by Météo-France who run the Regional Specialized Meteorological Center (RSMC) on Réunion Island. Should a tropical disturbance intensify and become a moderate tropical storm the two sub-regional tropical cyclone Advisory Centres in Mauritius and Madagascar in conjunction with RSMC La Réunion. The United States Joint Typhoon Warning Center (JTWC) also issue warnings on tropical cyclones in this region assigning a number with an "S" suffix. When monitoring a tropical cyclone the Joint Typhoon Warning Center will assess the cyclones intensity on the Saffir–Simpson hurricane scale whilst RSMC La Réunion, Mauritius and Madagascar use the Southwest Indian Ocean Tropical Cyclone Intensity Scale to assess a tropical cyclones intensity.
Timeline of the 2009-2010 South-West Indian Ocean cyclone season | |||||||
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![]() Season summary map | |||||||
Season boundaries | |||||||
First system formed | August 18, 2009 | ||||||
Last system dissipated | May 29, 2010 | ||||||
Strongest system | |||||||
Name | Edzani | ||||||
Maximum winds | 220 km/h (140 mph) (10-minute sustained) | ||||||
Lowest pressure | 910 hPa (mbar) | ||||||
Longest lasting system | |||||||
Name | David | ||||||
Duration | 13 days | ||||||
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Other years 2007–08, 2009–10 |