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Westerly system, easterly trough dictate weather

Vinson Kurian Thiruvananthapuram | Updated on April 02, 2011


The western disturbance across the northwest border and an upper air cyclonic circulation-offspring trough combine continue to influence weather over northwest, east, east-central and peninsular India overnight this (Saturday) morning.

The western disturbance over north Pakistan and neighbourhood persisted, an India Meteorological Department (IMD) update said in its morning bulletin. The system would affect western Himalayan region during the next three days.

The upper air cyclonic circulation over Assam and neighbourhood in lower levels also persisted.

It is from here that the weather-maker trough wound its way all the way down southeast-to-south south Tamil Nadu across West Bengal, Jharkhand, Chhattisgarh, Telangana and southeast Karnataka.

Satellite cloud imagery early on Saturday morning showed the presence of convective (rain-bearing) clouds over parts of west Jammu and Kashmir, Kerala and Andaman Sea.

Low to medium clouds are seen over parts of Bihar, rest northwest, northeast and rest of south peninsular India.

A weather warning issued by the IMD said that isolated thunder squalls would occur over Punjab, Haryana, Rajasthan, west Uttar Pradesh, Orissa, West Bengal, Sikkim, Arunachal Pradesh, Assam and Meghalaya until Monday.

Short-term forecasts said that fairly widespread rain or thundershowers would occur over the Northeastern States, sub-Himalayan West Bengal, Sikkim, and isolated over Jharkhand, Gangetic West Bengal, coastal Andhra Pradesh and Orissa.

Fairly widespread rain or snow would occur over Jammu and Kashmir and Himachal Pradesh and scattered over Uttarakhand until Monday and decrease thereafter.

Scattered dust storms or thunderstorms would occur over Haryana and Delhi and isolated over Rajasthan, Punjab, and west Uttar Pradesh during this period.

Scattered rain or thundershowers would occur over Kerala and isolated over south Karnataka, Tamil Nadu, Lakshadweep and Andaman and Nicobar Islands.

An extended forecast valid until Thursday (April 7) said that fairly widespread rain or thundershowers would occur over the Northeastern States while it would be scattered over east India.

Fairly widespread to scattered rain or snowfall would occur over western Himalayan region and isolated dust storms or thunderstorms over the plains of northwest India.

Meanwhile, an IMD update on weather until the evening of yesterday (Friday) said that scattered rain or snow occurred over Jammu and Kashmir as the western disturbance toyed with northwest India from across the border.

Fairly widespread rainfall was also reported from over Assam, Meghalaya, Arunachal Pradesh and Sikkim while it was isolated over Andaman and Nicobar Islands.

Maximum temperatures shot up by 7 to 10 deg Celsius over parts of Manipur, south Assam and Tripura on Friday.

It rise by 2 to 4 deg Celsius over parts of east Uttar Pradesh, Bihar, West Bengal, Tamil Nadu and rest Assam.

But they were below normal by 2 to 5 deg Celsius over parts of sub-Himalayan West Bengal, Sikkim, Assam, Arunachal Pradesh and Nagaland and near normal over rest parts of the country.

The highest maximum temperature of 42.5 deg Celsius was recorded at Rentachintala in Andhra Pradesh.

Published on April 02, 2011

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