Weather activities will begin today over most parts of the country and lasting until April 1. These rains will not be simultaneous but during this period, many areas will be seeing rains. In fact, hailstorm will be accompanied almost over all parts of the country excluding the southern parts.
For North India, rainfall along with hailstorm will be seen between March 30, 31 and April 1. For Central India, rains may be seen around March 30. Between March 30 and April 2, East India will be the ones seeing rain and thunderstorm.
Northeast India is as it is expected to see some rains between March 29 and April 1. As far as South India is concerned, some Pre Monsoon rains are expected in a few areas between March 29 and April 1 but it will not be widespread. Maharashtra may also not see a lot of rains.
Thus, within the bracket of March 29 and April 2, two days of activity will be seen over many parts of the country.
For North India, it is the Western Disturbance and its induced Cyclonic Circulations will be responsible for these rains. The systems shift further eastwards which give rains over Central India and East India and Northeast India. In fact, for these areas, the anti cyclone over Bay of Bengal gives moisture over these areas furthermore enhancing rains. Moreover, a circulation is also over Sub Himalayan West Bengal.
For South India, during the Pre Monsoon, the semi permanent feature which is the Peninsular trough which runs right from Telangana up to the Tamil Nadu region and keeps oscillating from its original position. When some system up north move, the trough also oscillates.