Northeast Monsoon remained active over Tamil Nadu, South Interior Karnataka and Rayalaseema for the last 3 days. Fairly widespread rain and thundershowers lashed most parts of South Peninsula with heavy rains at few places. Tuticorin, Palayankottai and Madurai recorded 171mm, 75mm and 57mm rainfall in the last 24 hours. Puducherry, Cuddalore and Chennai also received moderate rains with lightning and thunderstorm over most other parts of the state. Bengaluru, Coonoor, Kozhikode and Coimbatore also were lashed with intermittent showers with rainfall varying from 25mm to 50mm.
Weather activity is likely to continue for another 48 hours and gradually recede thereafter. Extreme southern parts of Peninsula and Kerala will receive bigger share during this period. A break is expected between 21st and 22nd November before it picks up again from 23rd November onward.
A low-pressure area supported by well-marked cyclonic circulation has appeared over the Southeast Arabian Sea and Lakshadweep region. This weather system is likely to strengthen and shift away from Kerala and Karnataka coast. The drag of moisture with its movement is likely to weaken Northeast Monsoon between 21st and 23rd November. Fresh wave is expected to arrive from 23rd November onward increasing spread of rainfall from 24th November onward with chances of heavy rainfall at few places along Tamil Nadu coast.
The rainfall activity in the last few days has helped to reduce the seasonal shortfall of state of Tamil Nadu and Rayalaseema. Tamil Nadu has improved from -46% to -36% and Rayalaseema gained from -10% to -2%. Pan India rainfall from 01st October to 17th November remains marginally deficit (-5%) with the largest regional deficiency of 65% over Northwest India.
