It is likely to rain extremely hard over many places on the coast and southern interior of Karnataka on Friday, the India Meteorology Department (IMD) warned.
It is also likely that it will rain very heavily on Kerala, the coast and the interior of southern Karnataka between Thursday and Saturday.
An offshore channel, an area of low pressure, runs between the southern coast of Maharashtra and northern Kerala.
The east-west shear zone, denoting a change in wind direction and speed, runs through peninsular India and a cyclonic circulation extends over the east-central Arabian Sea off the coast of Karnataka.
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IMD expects heavy rains in mainland India for the next three to four days due to these favorable conditions.
The meteorological bureau has issued a category orange warning for parts of Karnataka and Kerala, Assam and Meghalaya on Thursday and Friday. The warning implies that disaster management authorities must be prepared for any disaster related to heavy rains, such as floods.
The monsoon trough is north of its normal position (from Ganganagar of Rajasthan to the Bay of Bengal).
A cyclonic circulation also extends over the Ganges of West Bengal and its surroundings in the lower troposphere.
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It is very likely that it will rain widely with thunderstorms and lightning over the northeast and adjacent east India.
Heavy rains are expected in isolated locations over the sub-Himalayas of West Bengal and Sikkim for the next five days and over most of the northeastern states for the next four to five days.
An area of low pressure is likely to form over the west-central Bay of Bengal off the coast of Andhra Pradesh (AP) around September 13. The climatic phenomena will lead to the distribution of the rains and the intensity is likely to increase in Odisha, the AP coast, Yanam in Puducherry, Telangana, Vidarbha and adjacent areas from 12 September onwards.
In September, rainfall is likely to range between normal and above normal, as the four-month southwest monsoon prepares for a pullback, IMD had said on Monday.
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.
Typically, the monsoon retreat is scheduled to begin from September 17, when the rain begins to reduce across the country, to a full retreat on October 15.
However, this year’s extended range forecast from IMD 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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