Updated international weather forecasts indicate the possibility of extended western disturbance activity for northwest India.

The westerly activity might spill over beyond February 20, these forecasts say, bringing heavy to very heavy rainfall or snowfall for the hilly regions of the region.

Ensuing rains, isolated to scattered, may descend on the adjoining plains as well, with India Meteorological Department (IMD) coming out with a supportive forecast.

A weather warning said that isolated heavy to very heavy rain or snowfall may occur over Jammu and Kashmir from Sunday.

Side by side, the Bay of Bengal is forecast to be busy with easterly wave activity with rains, in various amounts, indicated for south Tamil Nadu and Kerala.

In its update on Saturday morning, the IMD said that scattered rainfall had occurred over Jammu and Kashmir until the evening of the previous day as the westerly system, first of incoming couple, bore down over the region.

Maximum temperatures were above normal by 2 to 5 deg Celsius over many parts of northwest, west, central and northeast India and isolated pockets of east India.

Satellite pictures at 5.30 a.m. on Saturday revealed the presence of convective (rain-bearing) clouds over parts of western Himalayan region and southwest Bay of Bengal.

The western disturbances would affect western Himalayan region during the next four days, the IMD said.

Forecast valid until 8.30 am on Tuesday spoke about the prospect of fairly widespread rain or snow over Jammu and Kashmir and Himachal Pradesh and scattered over Uttarakhand.

Isolated rain or thundershowers would occur over Punjab and Haryana on Sunday and will scale up thereafter.

In the south, scattered rain or thundershowers has been forecast over Andaman and Nicobar Islands on Sunday and Monday. Scattered rain or thundershowers have also been forecast for south Tamil Nadu while it will be isolated over interior Tamil Nadu and Kerala.

No significant change is expected in maximum and minimum temperatures over parts of northwest and adjoining central India during the next three days.

Extended forecast valid until 8.30 a.m. on Thursday said that the ffairly widespread rain or snowfall regime would continue to hold over western Himalayan region. It will be isolated over adjoining plains of northwest India.

Scattered rain or thundershowers would occur over south Tamil Nadu and Kerala.

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