TROPICAL CYCLONES

Why in news?

Malawi on alert for possible tropical cyclone.

ABOUT

• Tropical cyclones are violent storms that originate over oceans in tropical areas and move over to the coastal areas bringing about large scale destruction caused by violent winds, very heavy rainfall and storm surges.
• Tropical Cyclones are one of the most devastating natural calamities in the world.
• Tropical cyclones originate and intensify over warm tropical oceans.
• The conditions favourable for the formation and intensification of tropical storms are:
  • Large sea surface with temperature higher than 27° C.
  • Presence of the Coriolis force.
  • Small variations in the vertical wind speed.
  • A pre-existing weak low- pressure area or low-level-cyclonic circulation.
  • Upper divergence above the sea level system.

TROPICAL CYCLONES THAT RECENTLY STRUCK INDIA

ASANI: Andhra Pradesh coast 2022

MANDOUS: Chennai coast 2022

MICHAUNG: Chennai coast 2023

TAUKTAE: South Gujarat 2021

YAAS: West Bengal 2021

AMPHAN: West Bengal and Odissa 2021 (Super cyclone)

BIPARJOY: Gujarat coast 2023