In news

In view of the India Meteorological Department (IMD) forecast and the projected requirements ahead of the landfall of cyclone 'nivar', the National Disaster Response Force (NDRF) has deployed nearly 1,200 rescue personnel in Tamil Nadu, Andhra Pradesh and Puducherry and has put 800 others on standby.

Cyclonic Strom “NIVAR”

• It is very likely to cross the Tamil Nadu and Puducherry coasts between Karaikal and Mahabalipuram around Puducherry late on November 25 evening.
• The sea surface temperatures in the south Bay of Bengal is 29-30°C.
• These temperatures are 0.5-1.0°C above normal, which can make a difference.

Cyclone

• A cyclone is a general term for a weather system in which winds rotate inwardly to an area of low atmospheric pressure.
• For large weather systems, the circulation pattern is in a counterclockwise direction in the Northern Hemisphere and a clockwise direction in the Southern Hemisphere.
• Types of cyclones include tropical cyclones, extratropical cyclones and tornadoes.
• A tropical cyclone is a rotating low-pressure weather system that has organized thunderstorms but no fronts. They form over warm ocean waters.

Source: PIB