Low-Pressure Area Forming Over BoB: Revival of Monsoon Activity Likely

Key Takeaways:

• A fresh low-pressure area is likely to develop over the Bay of Bengal within the next 24-36 hours.
• Active to vigorous monsoon conditions are expected across several parts of India between September 12 and 16.
• West Bengal, Odisha, Bihar, Jharkhand, Chhattisgarh, Madhya Pradesh and Maharashtra will be among the main states affected.
• Rainfall activity is expected to start vacating western, northern and central India after September 18.
• Forecast validity: Next 7 to 9 days.

Monsoon activity has largely been confined to the eastern and northeastern parts of the country for the last few days. Earlier, the low-pressure area over Uttar Pradesh resulted in heavy rains in some pockets close to the foothills. The system finally merged with the trough, and the rains have diminished. A fresh spell is likely over many parts of the country, reviving monsoon activity.

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Under the influence of a cyclonic circulation over the Bay of Bengal, a low-pressure area is likely to develop within 24-36 hours. The circulation will get more organized and cover a broad area along and off the East Coast. The low-pressure area is expected to travel across the eastern and central parts of the country. The outskirts of the system may even reach the peripherals of East Rajasthan and Gujarat between 13th and 16th September 2026.

The weather activity will start over Coastal Odisha, Gangetic West Bengal, Bihar and Jharkhand today itself. It will consolidate further tomorrow and increase in spread and intensity thereafter. Active to vigorous monsoon conditions will prevail in many parts between 12th and 16th September 2026. Thereafter, the coverage will start shrinking, and the strength will also reduce. These mild conditions may extend for the subsequent one week or so.

The states under active to vigorous monsoon conditions will include West Bengal, Odisha, Bihar, Jharkhand, Chhattisgarh, Madhya Pradesh and Maharashtra. The landlocked subdivisions of Maharashtra will witness decent showers between 13th and 15th September 2026. West Madhya Pradesh, North Madhya Maharashtra and South Coastal Gujarat are likely to come in for heavy weather activity during this period. The peripheral weather activity will reach the outskirts of East Rajasthan as well.

The entire state of Uttar Pradesh and rain-stressed pockets of Punjab and Haryana will also get moderate showers in the last leg of the prolonged wet spell. The weather activity will start vacating the western, northern and central parts of the country anytime after 18th September 2026. There are no indications of any other system coming up over the Indian Seas during the rest of the month.