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News: Cyclone Burevi is heading towards the Tamil Nadu(TN) coast after crossing Sri Lanka.
Facts:
- Cyclonic Burevi: It is a tropical cyclone formed over southwest Bay of Bengal.It is expected to bring heavy rainfall over south Tamil Nadu and south Kerala.
- Named by: The name “Burevi” was suggested by the Maldives.
Additional Facts:
- Tropical Cyclones: These are storms that originate and intensify over warm tropical oceans.They are intense low pressure areas with very strong winds circulating around it in anti-clockwise direction in the Northern Hemisphere and in clockwise direction in the Southern Hemisphere.
- Different Names: Tropical Cyclones are known by different names in different regions:
- Cyclones in Indian Ocean
- Hurricanes in Atlantic
- Typhoons in Western Pacific in South China Sea
- Willy-Willies in Western Australia
- Conditions: The conditions favourable for the formation and intensification of tropical cyclones are:
- Large sea surface with temperature higher than 27° C;
- Presence of the Coriolis force enough to create a cyclonic vortex
- Small variations in the vertical wind speed;
- A pre-existing weak low-pressure area or low-level-cyclonic circulation is must for cyclone formation in tropics
- Upper divergence above the sea level system
