Rains are expected over the northwest plains as the western end of the monsoon trough is likely to move northward. The monsoon trough is passing through Ganganagar, Narnaul, Gwalior, center of the low pressure area over the north Madhya Pradesh and south Uttar Pradesh, Daltonganj, Behrampur and thence eastwards to Nagaland across Meghalaya. Monsoon trough is essentially a region of intensified monsoon winds.
While during the next forty eight to seventy two hours, due to the shift of the western end of the monsoon trough in the foothills of the Himalayas, a very severe session of showers is awaited over the Western Himalayan region. Jammu & Kashmir, Himachal Pradesh, Uttarakhand will be receiving heavy to very heavy showers during this period. The eastern end of the trough will also be close to the Himalayan foothills to bring rain over east and northeastern states. Rain would be incessant over sub-Himalayan West Bengal, Sikkim and northeastern states during this period.
Rainfall activity is likely to continue over the east Rajasthan, east Gujarat and Madhya Pradesh especially over northwest and west Madhya Pradesh as the low pressure areas currently positioned over north Madhya Pradesh and south Uttar Pradesh is expected to move towards northwest Madhya Pradesh. Rain would be moderate but heavy rain also cannot be ruled out during the next twenty four hours.
The prevailing monsoon trough in Jharkhand, sub-Himalayan West Bengal will fed by the moist southeasterly winds from the Bay of Bengal and the southwesterly winds from the Arabian Sea. This would result in rain over Vidarbha, Chhattisgarh, Jharkhand, Orissa, and Gangetic West Bengal during the next twenty four hours. Rain will be light to moderate. Rain is likely to subdue over Vidarbha after this period.
The west coast will continue with light showers as the seasonal offshore trough is weak. The trough is extending from Maharashtra to Kerala coast. Rain is likely to subdue over Kerala and Karnataka during the next twenty four hours as the southwesterly winds are flat. In the Southern Peninsula, Tamil Nadu is experiencing warm and humid conditions in the absence of rain. Isolated light rain can be expected at one or two places over north coastal Tamil Nadu.