The India Meteorological Department (IMD) on Sunday said dry weather is likely to be over most parts of northwest India during the next five days. According to the IMD, a low-pressure area is lying over northwest and adjoining west central Bay of Bengal off Odisha-north and Andhra Pradesh coasts. Under its influence, widespread rain and moderate thunderstorm with lightning is very likely over Odisha, Jharkhand, Gangetic West Bengal during the next 3-4 days. Heavy rainfall is very likely over Odisha during October 4 to 6 and over Gangetic West Bengal and Chhattisgarh during October 5 to 6.
IMD has declared a watch for a monsoon depression in the Bay of Bengal, the first in the post-monsoon season, from a new low-pressure area materialising around October 9 after an incoming ‘pulse’ from the upstream South China Sea matures in stages.
In the post-monsoon season, it is usual for the Bay of Bengal and the upstream South China Sea to rhyme in unison as south-westerly monsoon flows gradually ebb and are replaced by the north-easterly to easterlies conjured up by the seasonal anticyclone over the Tibetan highlands. Rainfall may increase over Odisha and coastal Andhra Pradesh from October 11-13 as the fresh low forms. Squally winds speeding to 40-50 km/hr may prevail of the North Andaman Sea, East Central and adjoining South-East Bay on October 9 and 10. Wind speeds could accelerate to 50-60 km/hr over the Central Bay on October 10 and 11 over North Coastal Andhra Pradesh and Odisha coasts and adjoining North Bay on October 11.
The IMD said that withdrawal of the monsoon from North-West India stays stalled as a prevailing low-pressure over the Bay of Bengal consolidates its grip on the opposite side over East India.