Rainfall over Kerala remained dull on 30th May & 31st May, after the purported onset of southwest monsoon on 29th May. Rainfall deficiency was 59% and 32% on 30th and 31st May respectively. Many stations across the state recorded NIL rainfall on these 2 days. However, all the 3 pre-monsoon months ended with a surplus for the state. Courtesy, heavy rains in the 3rd week of May, the state received nearly double the normal rainfall. Pre Monsoon season ended with recording 668.7mm against the normal of 361.5mm, a huge surplus of 85%.
June and July are the rainiest months during southwest monsoon season. Together, these months share about 68% of the seasonal rainfall. Unlike neighboring states of Karnataka and Rayalaseema (Andhra Pradesh), the 2nd half of the season is less punishing than the 1st half. Month of June alone caters for 32% of the seasonal rainfall and has a normal of 643mm, much higher than August and September. Last year, the state had witnessed deficit rains in June and July, near normal in August (-2%) and surplus of 22% in September. The season as such finished with a shortfall of 16%.
Rainfall is expected to pick up over the next 3 days, between 01st-04thJune. Monsoon surge is expected to strengthen further and major bursts of monsoon is likely during next week. Moderate to heavy showers with few places having very heavy falls are anticipated between 07th and 10thJune. Northern half of the coastline will be more vulnerable than the southern one. Vellarikkundu, Kannur, Kozhikode, Thrissur, Thalassery, Wayanad, Kudulu and Kasargod will be at risk of disrupting rains.
