logo Cyclone basin of the South-West Indian Ocean Wednesday, September 20th 2017 - 01:49 UTC

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Cyclone season 2016-2017


Cyclone season 2017-2018

Tropical storms and cyclones names for the 2017-2018 season in the South-West Indian Ocean

AVA (MADAGASCAR) BERGUITTA (SEYCHELLES) CEBILE (ZIMBABWE)
DUMAZILE (SWAZILAND) ELIAKIM (KENYA) FAKIR (COMORES)
GUAMBE (MOZAMBIQUE) HABANA (BOTSWANA) IMAN (MAURITIUS)
JOBO (LESOTHO) KANGA (SOUTH AFRICA) LUDZI (MALAWI)
MELINA (TANZANIA) NATHAN (FRANCE) ONIAS (ZIMBABWE)

A Terminology used for classification of tropical depressions in the South-West Indian Ocean

AREA OF DISTURBED WEATHER

Area of low pressure without organization

TROPICAL DISTURBANCE

Low Pressure area with enhanced convection and a cyclonic wind circulation to be not exceeding 27 kts ( 50 km/h)

TROPICAL DEPRESSION

Low Pressure area with organized convection and definite cyclonic wind circulation in which the maximum of the average wind speed is estimated to be in the range 28 to 33 kts (51 to 62 km/h)

MODERATE TROPICAL STORM

System in which the winds near the centre is estimated between 34 to 47 kts (63 to 88 km/h)

SEVERE TROPICAL STORM

System in which the winds near the centre is estimated between 48 to 63 kts (89 to 117 km/h)

TROPICAL CYCLONE

System in which the winds near the centre is estimated between 64 to 89 kts (118 to 165 km/h)

INTENSE TROPICAL CYCLONE

System in which the winds near the centre is estimated between 90 to 115 kts (166 to 212 km/h)

VERY TROPICAL CYCLONE

System in which the winds near the centre is estimated to exceed 115 kts (212 km/h)

SUBTROPICAL DEPRESSION

An hybrid system having during its life some characteristics which could belong to both tropical and extra-tropical depressions. In the South-West Indian Ocean, the genesis of such system is regulary observed over the South of Mozambique channel

* The wind speed is the mean wind over 10 minutes


CLASSIFICATION OF TROPICAL DISTURBANCE FOLLOWING THE SCALE OF VERNON F.DVORAK

Dvorak