Low Pressure to bring isolated heavy rains in South Tamil Nadu

The Low Pressure off the coast of Sri Lanka continues to persist as rains resumed over Coastal Tamil Nadu since last night.  Parts of delta districts got some rains since late evening with both Karaikal & Nagappattinam IMD observatories recording about 1 cm till 5:30 in the morning.  Even parts of Chennai got passing showers after midnight as cloudy skies started to set the pattern over most parts of Tamil Nadu.

Things are expected to pick up pace today over South Tamil Nadu and coastal areas, in particular in and around delta districts as the Low Pressure moves little to the West over the course of the day.  One or two places in South TN could get isolated heavy rains especially along the Western Ghats where low level  moisture could get trapped under orographic effect.

The Low Pressure now lies E/SE of Sri Lanka along the Equatorial Waters of Southwest Bay.  Unfortunately it lies possibly a little more South than the ideal location for widespread rains over Tamil Nadu. Nevertheless models expect this LPA to graze the Sri Lankan coast and possibly move in a W/NW direction.  This could give rains over South TN for the next couple of days with interior areas also enjoying few spells of rains when the LPA moves west of Sri Lanka.

As of now models are not expecting any major intensification from this Low Pressure when it moves into Arabian Sea with possibly another disturbance emerging out of the broad circulation now prevailing all the way from Sri Lanka to Malay Peninsula.  Where this pulse emerges will be key to the subsequent rainfall prospects for Tamil Nadu.

Chennai and surrounding areas of North TN could get spells of on and off light rains during the day, occasionally it could be moderate at times. A fabulous day in terms of temperature awaits the citizens so go ahead and enjoy the day.