South West Monsoon has entered into weak phase over South Peninsula on the back of weakening of westerly winds blowing from the Somali jet, a seasonal feature over Arabian sea during monsoons. As monsoon winds weaken, the instability builds up over interiors of peninsula, aided by unstable wind patterns, heat and moisture. Weather in the upcoming week is guided in this backdrop. Warmer day and partly cloudy skies will dominate most parts of Kerala, Tamilnadu, Rayalaseema and Interior Karnataka. In Tamilnadu, western and North western districts adjoining ghats(Coimbatore Erode Tiruppur Salem Dharmapuri Krishnagiri Tirupathur) are forecast to get isolated rains today. Day time temperatures would settle at seasonal normals except over South TN interiors where heat can be slightly higher than normal.
Monsoon is on an overdrive in North Eastern parts of the country where flood situation is grim as incessant monsoon rains continue to lash foothills of Sub Himalayan West Bengal, Assam and Arunachal Pradesh. Heavy to very heavy falls are forecast for Assam Meghalaya and Arunachal Pradesh for next 2-3 days. Monsoon rains slip onto the Gangetic plains and Indus plains as well, as the monsoon axis looks firmly placed on these zones providing useful rains and eliminate deficits incurred. Subtle monsoon weather would prevail over the rest of the country in the absence of rain driving systems.