The low pressure area over south Haryana and west Uttar Pradesh persists and an associated upper air cyclonic circulation would ensure continuous rainfall activity over the entire region during the next forty eight to seventy two hours. The temperatures over the entire region would also fall due to continuous rain.
This low pressure area is also holding up the western end of the monsoon trough, which was about to shift north of its normal position into the foothill of the Himalayas. The monsoon trough is passing through Ferozpur, Karnal, Bareilly, Gorakhpur, Bhagalpur, Kolkata and thence southeastwards to eastcentral Bay of Bengal. Monsoon trough is essentially a region of intensified monsoon winds.
The presence of the monsoon trough in Bareilly, Gorakhpur, Bhagalpur and Kolkata indicates that the southeasterly winds from the Bay of Bengal and the southwesterly winds evolving in the Arabian Sea are reaching up to these areas. This would bring rain at many places over Gangetic plains in Uttar Pradesh, Bihar and West Bengal during the next twenty four to forty eight hours. Showers could be heavy at a few places over these areas.
The areas southwest of the eastern part of the monsoon trough in Jharkhand, Orissa, Chhattisgarh and some parts of east Madhya Pradesh would also receive rain during the next twenty four hours. The rainfall activities are expected to stay over Gangetic West Bengal, Orissa, Jharkhand, Chhattisgarh and east Madhya Pradesh as a cyclonic circulation is likely to form over the head Bay of Bengal during the next twenty four to forty eight hours. This circulation would enter the land during the next one or two days.
The southwesterly winds and the southeasterly winds continue to collide over the adjacent areas of south Karnataka, Andhra Pradesh and Tamil Nadu. Light to moderate rain would continue over these places during next twenty four hours.
Along the west coast, the seasonal offshore extending from Maharashtra coast to Kerala coast remains weak. Light to moderate rain under the influence of the southwesterly winds from the Arabian Sea would continue to happen during the next twenty four hours.