As anticipated, a low pressure area has formed over West-Central Bay of Bengal (BoB). It is likely to move westward and shift over Northwest Bay and adjoining coastal parts of South Odisha and North Coastal Andhra Pradesh during next 24-36 hours.
It may also become well marked, remaining mostly over sea and partly over land. It is a slow moving system and will travel right up to Rajasthan moving across Odisha, Chhattisgarh, Telangana, Maharashtra, Madhya Pradesh and Gujarat.
Forward section of the system, as an east-west trough has already breached the coastline. Weather activity will pick up over Odisha, Andhra Pradesh, South Chhattisgarh and Telangana, today and tomorrow. Low pressure will move inland on 11thSep and the spread of weather activity will increase and reach Vidarbha, Marathwada and Madhya Pradesh also.
While the intense weather activity will vacate Odisha, Andhra Pradesh and Telangana on 12thSep, forward section will cover parts of North Madhya Maharashtra, North Gujarat and Southwest Madhya Pradesh. The system may take a recurving course from hereon and therefore slowdown to spend about 2 days over the region. In its final leg, as a weakened system, the low will travel up to North Rajasthan, Haryana, Delhi and Punjab before breaking up along the foothills.
Life span of this system is expected to last beyond mid – September. This will coincide with the commencement of normal retreat of monsoon from the extreme western parts. Track, timelines and spread of this system will decide on the furtherance of monsoon activity, if any, over West Rajasthan and Punjab sector. There is possibility of yet another weather system coming up at the tail end of the monsoon trough. However, these subsequent systems normally do not access the western state of Rajasthan. More likely, they take a recurving track, while over the central parts of the country.