The incoming western disturbance is expected to affect northwest India during the next two to three days, an India Meteorological Department (IMD) outlook said on Thursday.

It may not significantly impact the heating pattern over land in the region, according to the outlook.

Isolated rain or thundershowers may unfold over Jammu and Kashmir, Himachal Pradesh and Uttarakhand until Saturday before scaling up over Jammu and Kashmir.

Isolated dust storms or thunderstorms would occur over Punjab, Haryana, Rajasthan and Uttar Pradesh on Friday and Saturday.

These would have some influence on maintaining the current levels of temperature. The IMD sees no big change in temperatures over the plains of northwest India and adjoining central and west India on Friday and Saturday.

But the system, on its further eastward movement, could cause a flare-up in the ongoing thunderstorm activity in east and northeast India until Tuesday.

Global model predictions suggest that the core heating would spread east-southeast from northwest India from next week and cross Madhya Pradesh and Maharashtra before entering Andhra Pradesh.

Satellite imagery in the afternoon showed the presence of convective (rain-bearing) clouds over parts of south and east-central Bay of Bengal and the Comorin area.

An upper air cyclonic circulation persisted over Punjab and neighbourhood. Another circulation hung over interior Maharashtra and neighbourhood. A trough extended from this system to southeast Tamil Nadu and adjoining southwest Bay of Bengal where too an upper air cyclonic circulation has persisted from overnight.

In this manner, weather-repelling region of high pressure (ridge) has been driven away from the Bay of Bengal, which is now set to host weather systems provided other factors too fall in place.

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