At present, the entire South Peninsula is running rain deficient by 48%. Karnataka is running deficient by 33% while, deficiency in Kerala is 55%. Tamil Nadu is observing a rain shortage of 63%.
For the last few days, scattered rains are being witnessed in South Interior Karnataka, and at a few places in Kerala.
Interior Tamil Nadu, and South Interior Karnataka have received heavy rainfall at one or two places recently. But as these pre-Monsoon activities remained patchy and there were no widespread rains, deficiency in the region still persists.
Now, we expect a marginal increase in rainfall activities in Kerala and South Interior Karnataka. However, heavy to very heavy rains are ruled out as of now.
The reason for these rains can be attributed to the presence of a North-South trough extending from Bihar up to South Interior Karnataka. A Confluence Zone has also formed over Tamil Nadu and Kerala due to which humid winds from the Arabian Sea and the Bay of Bengal are feeding more moisture to the region.
On and off activities will continue until the onset of Monsoon over Kerala. Despite Monsoon making onset, we do not expect the intensity of rain to increase soon. Patchy rains will continue thereafter.
So, we can say that there are meagre chances of heavy to very heavy rain in parts of Kerala, South Interior karnataka and Tamil Nadu.
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