Wednesday, January 05, 2011

Cold wave begins to extend to east India

The rain-maker western disturbance has moved away to the east, and the cold wave will now extend its tongue from north-west India to east India.
A warning issued by India Meteorological Department (IMD) mentioned about the probability of ground frost developing over isolated places of Punjab, Haryana, north Rajasthan and west Uttar Pradesh during the first three nights of the first week of the New Year.

Cold wave conditions are set to continue over parts of Madhya Pradesh and isolated pockets east Rajasthan on Monday.
Strong and dry northwesterly winds prevailed over northwest and adjoining central India on Sunday.
These conditions are likely to extend over parts of southwest Uttar Pradesh, south Bihar, north Chhattisgarh and Jharkhand on Monday and Tuesday. The IMD said that night temperatures may fall by a further 2 to 3 degree Celsius over Indo-Gangetic plains and plains and adjoining areas.
Due to the prevailing winds, the wind chill factor will continue to affect these areas on Monday and Tuesday.

Shallow fog may unfold over parts of Punjab, Haryana, north Rajasthan, Uttar Pradesh and Bihar during the morning hours. International models are of the view the cold wave conditions might venture as far east as into Uttar Pradesh, Bihar and adjoining Jharkhand and Chhattisgarh during the rest of the week.
But the week that follows would see the cold snap invading northeast India, even as a severe cold event begins to sit heavy in the immediate rear and exerts itself over the Himalayas.
Nepal and the bordering foothills along Uttarkhand, Uttar Pradesh and Bihar in India are forecast to slip under severe cold conditions during this period.

This would be brought about as a high-pressure cell builds across the north-west border heralding clear skies and cold to severe arctic air from northwest to east India.
This condition would relent somewhat around the weekend when a feeble western disturbance manages to find its way into the northwest bringing a warming anomaly into play.
This phase would also see fresh easterly wave activity over Bay of Bengal with the Tamil Nadu coast forecast to get hit once again.
Meanwhile on Sunday, the IMD said a feeble low-pressure area hung around the east-central Arabian Sea with a trough extending into the Comorin area across Lakshadweep.
The feature also showed an embedded upper air cyclonic circulation over Lakshadweep and adjoining areas.
Forecast valid until Friday said that scattered rain or thundershowers would occur over extreme south peninsula while it would be isolated over northeast India.
Forecast for the next three days said that isolated rain or thundershowers would occur over Sub-Himalayan West Bengal, Sikkim, Assam, Meghalaya and the northeastern states as the rain-maker westerly system on the exit mode makes its presence felt.
Scattered rain or thundershowers would also occur over Tamil Nadu, Kerala, Lakshadweep and Andaman and Nicobar Islands.
The last 24 hours ending Sunday morning saw scattered light rainfall over Sub-Himalayan West Bengal, Sikkim, Arunachal Pradesh, Assam and Meghalaya.
In the south, they were confined to Andaman and Nicobar Islands and extreme south peninsular India.
Cold day conditions prevailed over most parts of Punjab, Haryana and north Rajasthan where maximum temperatures remained around 16 deg Celsius or below.
Cold wave conditions also prevailed over most parts of Madhya Pradesh, some parts of east Madhya Pradesh and isolated pockets of east Rajasthan.
The lowest minimum of 3.6 deg Celsius C was recorded overnight at Narnaul in Haryana.

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