Cyclone Asna

Reference

Cyclone Asna is an extraordinary meteorological phenomenon, which is in the news due to its unusual origin and development. Unlike normal cyclones, which form over the warm sea surface, Cyclone Asna originated in Gujarat.

Geographical Origin of Cyclone Asna

• Cyclone Asna is a rare phenomenon geographically because it originated on land in Gujarat, far away from the normal sea surface.
• After originating on land, this cyclone moved towards the Arabian Sea and picked up water vapor from there.
  • Whereas, fewer cyclones form in the Arabian Sea than in the Bay of Bengal, especially in the month of August.
• This cyclone has been named ‘Asna’ by Pakistan.

Factors in Cyclone Asna's Genesis

• Cyclones in the Arabian Sea during August are extremely uncommon, with only four such events recorded since 1891.
• The formation of Cyclone Asna highlights its uniqueness in the context of regional meteorological patterns.
• The monsoon played a key role in the development of Cyclone Asna.
  • The low pressure system associated with the monsoon over Gujarat contributed to the initial formation of the depression that eventually became Cyclone Asna.
• This interaction between monsoon dynamics and cyclone formation is unusual, especially given the land-based origin of the cyclone.
• The warm Arabian Sea played a key role in intensifying Cyclone Asna.
  • The water surface temperature in the Arabian Sea was above 27–28°C, which is critical for cyclone development.