Many parts of south Peninsula are experiencing intense rain and thundershower activities since last few days. In fact, pre monsoon activities are on over Kerala since second half of March, which is why Kerala is large rain surplus by 128%. Two depressions have formed over South Andaman Sea in March leading to Intense rainfall over Andaman and Nicobar Islands.
Therefore, Andaman and Nicobar is surplus by a whopping 260%. Karnataka and Tamil Nadu have joined the race in the month of April. But they have been receiving decent rainfall and Karnataka is surplus by 40% and Tamil Nadu by 32%. Andhra Pradesh and Telangana are large and rain deficient due to scanty rainfall.
A trough is extending from a Vidarbha to Kerala across interior Karnataka and a cyclonic circulation is over Southeast Arabian Sea, another cyclonic circulation is over South Tamil Nadu.
These weather parameters are enhancing the rainfall activities over Lakshadweep, Kerala, Tamil Nadu and South Karnataka. Intense rain activities are expected to continue over above-mentioned states until April 16 or 17, thereafter intensity will go down. Light scattered rain may continue thereafter.