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Rain or thundershowers have been forecast over extreme south peninsular India and along the east coast over the next week.
This is expected to gradually grow in strength to precipitate northeast monsoon ‘anytime after October 17’ if model forecasts are any indication.
‘LOW’ PERSISTS
On Tuesday, a rain-driving low pressure area persisted over north-west Bay of Bengal and adjoining coastal Odisha as did a circulation over east-central Arabian Sea. They threw in an east-to-west trough of lower pressure linking the Arabian Sea with south-west Bay of Bengal across Karnataka and north Tamil Nadu.
Global weather maps showed another low-pressure area having dropped anchor over extreme southeast Bay of Bengal.
An India Meteorological Department (IMD) forecast valid until Friday said that thundershowers may break out over coastal and south interior Karnataka, Kerala, Tamil Nadu and Lakshadweep.
PENINSULAR RAINS
Rain or thundershowers would also occur at one or two places over Rayalaseema and coastal Andhra Pradesh.
North interior Karnataka, Konkan, Goa and south madhya Maharashtra too may witness occasional rain during next two days before drying up.
This would likely help the retreating South-West monsoon to exit more areas in Central India and north peninsular India.
Weather would be mainly dry over plains of north-west India and Central India. An IMD outlook for the next three days said that heavy rainfall would occur at one or two places over the north eastern States during next three days.
MERCURY FALLS
Heavy rainfall has also been forecast at one or two places over Odisha, West Bengal and Sikkim on Wednesday.
Minimum (night) temperatures have already fallen by 3 to 4 deg Celsius over parts of Bihar and isolated pockets of sub-Himalayan West Bengal and Sikkim.
Both maximum and minimum temperatures are expected to fall by another 2 deg Celsius over plains of north-west and Central India during the next three days.
Overnight on Tuesday, they were below normal by 2 to 4 deg Celsius over Jammu and Kashmir, west Rajasthan, Madhya Pradesh, Chhattisgarh and south coastal Andhra Pradesh.
The lowest minimum of 15.5 deg Celsius was recorded at Malanjkhand in Madhya Pradesh.
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