Holiday declared in several Tamil Nadu districts; yellow alert in Telangana, Karnataka due to Cyclone Fengal .

Tags: Environment

Cyclone Fengal 

Why in the news?

• Holiday declared in several Tamil Nadu districts; yellow alert in Telangana, Karnataka due toCyclone Fengal .

About cyclone fengal:

• Cyclone Fengal (pronounced ‘Fein-jaal’) is a tropical cyclone. It originated inthe Bay of Bengal.
• The remnant low pressure area is likely to emerge over southeast and adjoining east-central Arabian Sea off north Kerala-Karnataka coasts around December 3.
• Moreover, the IMD has issued a yellow alert in Telangana’s Jayashankar Bhupalpally, Mulugu, Bhadradri Kothagudem, Khammam, Nalgonda, Suryapet, Mahabubabad, Warangal, Hanamkonda, and Jangaon districts for December 2.

About Cyclones :

• Cyclones are large storms that form when water evaporates from the surface of a sea into the air. As it rises, the air cools and becomes saturated with vapour, eventually forming clouds. 
• These clouds and the air circulation around them eventually start to rotate. The warmer the sea, the more powerful the cyclone will be.
• It consists of cold air descending from the cyclone’s top with warm air rising in a spiral around it. 
• The eyewall consists of high thunderstorms that bring rain, lightning, and powerful winds.

About tropical cyclone:

• A tropical cyclone is a weather phenomenon that is essentially a rapidly rotating storm system with characteristics such as a low-pressure center, strong winds and thunderstorms that produce heavy rain, among others.
• Tropical cyclones are compact, circular winds with a diameter of 320km. Its winds swirl around a central region that has low atmospheric pressure. 
• The rotation of the winds is largely driven by the low-pressure centre and by the rotation of the Earth.

Tropical cyclones  in general, have different terms and names depending on their location and strength:

• These include‘hurricanes’ in the North Atlantic Ocean and eastern North Pacific region,
• While being referred to as typhoons in the western North Pacific region.
• The nomenclature in the Southern Pacific and the Indian Ocean severe tropical cyclones or simply cyclones.
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