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Central India and adjoining north peninsular India have just had their share of some weather after a helpful trough originating from upcountry-based cyclonic circulations ventured deeper into the south.
An India Meteorological Department (IMD) update on Friday evening said that fairly widespread rainfall occurred over Vidarbha and isolated over Marathawada, Madhya Pradesh, north Interior Karnataka during the 24 hours ending in the morning.
On Friday, this upper air trough looked down from north Madhya Pradesh to as far south as south Kerala coast with an embedded cyclonic circulation over north interior Karnataka and neighbourhood.
A counterpart but feeble trough had lain diagonally from north Madhya Pradesh to south Rajasthan.
This was the atmosphere setting that awaited the arrival of a fresh western disturbance over northwest India likely from Saturday.
Satellite imagery in the afternoon showed the presence of convective (rain-bearing) clouds over southwest Punjab, north Rajasthan and Andaman Sea. Low to medium-high clouds were seen over the rest of the country except Bihar, Gujarat and south extreme peninsular India.
A weather warning issued by the IMD said that isolated thunder squalls would occur over east Madhya Pradesh, Chhattisgarh and Vidarbha until Sunday.
A short-term weather outlook said that scattered rain or snow would occur over Jammu and Kashmir and Himachal Pradesh while it would be isolated over Uttarakhand on Saturday, before scaling up.
Isolated dust storms or thunderstorms would occur over Punjab, Haryana, north Rajasthan and Uttar Pradesh.
Scattered rain or thundershowers are likely over the Northeastern States while it would be isolated over interior Maharashtra, east and adjoining central India until Monday.
Isolated rain or thundershowers has also been forecast over south peninsular India and Andaman and Nicobar Islands.
Rain may thicken over Andaman and Nicobar Islands from Sunday as a prelude to what global models have been predicting would be raised level of activity over the larger Bay of Bengal.
Maximum temperatures are expected to fall by 2 to 3 deg Celsius over the plains of northwest India and there would be no significant change over central and east India during the next three days.
An extended forecast valid until Wednesday said that fairly widespread rain or snow would sustain over the western Himalayan region while isolated dust storms or thunderstorms has been forecast over the plains of northwest India.
Fairly widespread rain or thundershowers would occur over the Andaman and Nicobar Islands and scatter over the Northeastern States, Kerala and coastal Karnataka while being isolated along the east coast.
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