New Delhi: The India Meteorological Department (IMD) on Monday (September 28, 2020) said that the southwest monsoon has withdrawn from some parts of west Rajasthan and Punjab.
The IMD also said that the conditions are becoming favourable for further withdrawal of southwest monsoon from some more parts of Rajasthan, Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh and Madhya Pradesh during next 2-3 days.
Conditions are becoming favourable for further withdrawal of Southwest-Monsoon from some more parts of Rajasthan and Punjab and some parts of Haryana, Chandigarh & Delhi, Uttar Pradesh and Madhya Pradesh during next 2-3 days.
— India Met. Dept. (@Indiametdept) September 28, 2020
The IMD noted that a trough runs from a cyclonic circulation over east Bihar to west-central Bay of Bengal off Andhra Pradesh coast across Gangetic West Bengal and coastal Odisha at lower tropospheric levels and under the influence of this system:
1. Scattered to fairly widespread rainfall with moderate thunderstorm and lightning very likely over south peninsular India during the next 3 days.
2. Isolated heavy falls are very likely over Tamil Nadu during next 2 days.
3. Isolated heavy falls are very likely over Rayalaseema, South Interior Karnataka and Kerala on September 29.
The IMD said that dry weather is very likely over most parts of northwest India during next 5 days and moderate thunderstorm with lightning very likely at isolated places over north peninsular India, Central and northeast India during next 12 hours.
As per a few reports, India has received 9 per cent more rainfall than the normal until September 27.
According to IMD, the seasonal cumulative rainfall during 2020’s southwest monsoon season up to September 16 was above LPA by +7%.
Notably, the LPA of rainfall is the rainfall recorded over a particular region for a given interval (like month or season) average over a long period like 30 years, 50 years etc. It acts as a benchmark while forecasting the quantitative rainfall for that region for a specific month or season.
The official rainfall season in the country starts from June 1 and withdraws from the southern peninsula and hence from the entire country only after October 1.