An Upper Air Cyclonic Circulation currently off the North Coastal Andhra could evolve into the a Low Pressure within the next 48 hours or so. This is expected to bring widespread rains to many parts of Coastal Andhra Pradesh over the next few days. The welcome change in conditions could also mean increased rainfall prospects for the rest of Peninsular India as well.
Under the influences of this UAC today a few places in Chhattisgarh, Odisha, Andhra & Telengana could see heavy spells of rains. The rains are expected to increase as the circulation descends to surface level over the next 24 – 48 hours or so and starts moving closer to coast on a W/NW track. Some models are indicating this low could travel along the interiors of Peninsular India and regenerate itself once again in Arabian Sea though it is too early to confirm if it could indeed happen.
In the meanwhile we are likely to see some activity in Coastal Tamil Nadu as well with isolated rains expected today in a few areas. In particular parts of South Coastal Tamil Nadu between Ramanathapuram & Nagappattinam is likely to see isolated spells of moderate rains.
There is some chance of rains for North Coastal Tamil Nadu as well around Chennai though this will depend on how the sea breeze front interacts with remnant moisture being moved around by the Upper Air Cyclonic Circulation. Nevertheless compared to the last few days the chances of rains around Chennai is certainly a couple of notches higher though widespread meaningful rains are not yet on the cards. We could see some places in and around Chennai get isolated rains which could be moderate at times.