THIRUVANANTHAPURAM: Heavy rainfall (7-11 cm in 24 hours) is very likely to occur at isolated places in Kerala due to a Cyclonic Circulation which lies over Comorin area & neighbourhood.

The heavy rainfall is very likely to occur in the districts of Ernakulam, Idukki Palakkad & Malappuram on November 21, Thiruvananthapuram, & Malappuram on November 22, Pathanamthitta, Ernakulam & Malappuram on November 23, Pathanamthitta, Idukki, Ernakulam & Malappuram, on November 24.

Heavy (7cm to 11cm in 24 hours) to very heavy (12cm to 20 cm in 24hours) rainfall likely to occur at isolated places in the district of Pathanamthitta & Idukki on November 22, Idukki on November 23.

Rain or thundershowers is most likely to occur at one or two places in Kerala on November 20, at many places on November 21, at most places from November 22 to 24 and at a few places on November 25 and 26. Thunderstorm with lightning is very likely to occur at one or two places in Kerala on November 20.

Thunderstorm with lightning accompanied by gusty winds, speed reaching 30-40 Kmph, is very likely to occur at one or two places in Kerala from November 21.

Northeast monsoon has been weak over Kerala. Rain occurred at many places in Lakshadweep and at one or two places in Kerala. The Cyclonic Circulation lies over Comorin area & neighbourhood and extends upto 3.1 km above mean sea level.

A trough in easterly at mean sea level runs from Sri Lanka to Southwest & adjoining West central Bay of Bengal. A Cyclonic Circulation lies over Southwest Bay of Bengal off Tamil Nadu coast and extends up to 3.1 km above mean sea level.