First storm formed November 19, 2011
Last storm dissipated Season currently active
Strongest storm Alenga – 145 mph, 901 hPa
Total disturbances 1
Tropical depressions 1
Tropical storms 1
Tropical cyclones 0
Intense tropical cyclones 0
Total damages None
Total fatalities 0

The 2011-12 South-West Indian Ocean cyclone season was an annual event of tropical cyclone formation. It started on November 15, 2011 and ended on April 30, 2012. For Mauritius and the Seychelles, the season continued until May 15. These dates conventionally delimit the period of each year when most tropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.


Very Intense Tropical Cyclone Alenga

Very intense tropical cyclone (MFR)
Clockwise vortex
Duration November 19 – November 25
Peak intensity 230 km/h (145 mph) (1-min)  901 hPa (mbar)