Winter season which is January and February, South India had underperformed with -14 percent rains, with Tamil Nadu being the poorest seeing over 80 percent deficiency. On the other hand, Rayalaseema, Telangana, South Interior Karnataka performed well.
Talking about March, which is the transition month and sees heat for South India. In fact, summers start to set in, which was the case this time as well.
During the first week of March, heatwave was observed in some pockets of Interior Tamil Nadu and Rayalaseema where temperatures exceeded 40 degrees Celsius and the rain stats were at 49 percent rain deficient. In the second week, the deficiency rose to 58 percent while as on March 19, the deficiency is at 67 percent. Thus, Pre Monsoon activity which generally sets in, is not there completely. Let us know why:
Only in the first week of March, a couple of days saw some thunderstorm activities including Kerala and Tamil Nadu.
Otherwise, practically, many pockets remained almost dry. Moreover, North Interior Karnataka and Rayalaseema so far has been dry.
Now, rains have been absent. Usually, with the heat coming up over South India, a Peninsular trough keeps coming up in the interior parts. Along with this, on either side coastline, winds are of different patterns, thus either wind discontinuity develops. Also, along with the feature, temperatures are needed to be high.
This time, extreme heat has been not there due to frequent passage of systems up North and along with which induced systems. This is a dominating feature at the moment, and it has been suppressing the features over Peninsular India.
Moreover, in the coming days also, Pre Monsoon features are not likely to come up and weather will remain dry over the South as up North, weather activity will continue.
Image Credit: wikipedia
Please Note: Any information picked from here must be attributed to skymetweather.com