Southwest monsoon has set in over Kerala today, the 29th May 2011, 3 days in advance to the normal onset on 1st June. Southwest Monsoon has also advanced into most parts of south Arabian Sea and some parts of Tamil Nadu, south Bay of Bengal, south Andaman Sea.
The northern limit of monsoon passes through 11° N / 60° E, 11° N / 70°E, Aminidivi, Kozhikode, Kodaikanal, 8°N / 80°E, 8° N / 90°E , Nancowry and 9° N / 99° E. Widespread rainfall has occured over Kerala and Lakshadweep, scattered over south Tamil Nadu & Nicobar Islands during past 24 hours. The chief amounts of rainfall (1 cm & above) recorded at 0830 hours IST of today are: Kottayam 10, Cochi, Kozhikode, 7 each, Karipur 6, Cochi(AP) 4, Aminidivi, Minicoy and Kavarati 3 each and Mangalore 1.
Onset of southwest monsoon over Kerala took place in association with an upper air cyclonic circulation over southeast Arabian Sea off Kerala coast. Conditions are favourable for further advance of southwest monsoon over some more parts of Arabian Sea, remaining parts of Kerala, some more parts of Tamilnadu, south Bay of Bengal and Andaman Sea and some parts of Karnataka during next 2 – 3 days.