An area of low pressure formed over the west central Bay of Bengal off the coast of Andhra Pradesh on Sunday, likely to result in increased intensity and distribution of rainfall in Odisha, the coast of Andhra Pradesh and Yaman, according to the Indian Meteorological Department (IMD). ) newsletter published Sunday morning.
The monsoon trough (low pressure line) is south of its normal position (Ganganagar to the Bay of Bengal). The eastern end of the monsoon trough is likely to shift further south due to the formation of a low pressure area over the west-central Bay of Bengal off the coast of Andhra Pradesh by tomorrow.
Heavy to very heavy rain is likely over Odisha, the Andhra Pradesh coast and Yanam on Sunday; Telangana on September 13 and 14 and Gujarat on September 16.
A cyclonic circulation also extends over the eastern center of the Arabian Sea off the coast of Maharashtra. The east-west shear zone, an area of change in wind direction and speed, runs through mainland India and is likely to persist for the next 3-4 days.
There is also an offshore trough at mid-sea level from the north coast of Maharashtra to the north coast of Kerala. Under the influence of these favorable conditions, widespread rains with isolated heavy rains, thunderstorms and lightning are likely to occur over western mainland India over the next 4-5 days.
Heavy to very heavy rain is very likely in isolated locations over Konkan, Goa, Kerala and Mahe on Sunday and also over the southern interior of Karnataka, parts of Saurashtra and Kutch.
Also read: Pune records 31mm of rain on Friday, Khadakwasla discharge begins
Monsoon rain since June 1 is 6% excess with 0% excess recorded in East and Northeast India, 12% deficient rainfall in Northwest India, 15% excess in central India and a 23% excess in the south of the peninsula.
In September, there is a 23.5% deficiency in the country with 41.5% deficiency in Northwest India, 22.5% deficiency in East and Northeast India, 41.4% deficiency in central India and 50.7% excess in the south of the peninsula.
Also read: 71 percent less rainfall in Delhi in September so far
Rainfall is likely to be poor until at least September 13 in most parts of the country, including northwestern and central India, before intensifying after September 17, according to the IMD’s extended-range forecast. Normally, the monsoon retreat is supposed to start from September 17, when the rain begins to reduce across the country, until it fully retreats on October 15.
But this year IMD’s extended range forecast shows extensive and heavy rains along the west coast between September 11 and 24 and then until October 1 in various parts of central India.
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