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Easterly wave may bring some relief from heat

Vinson Kurian

Thunderstorms, sporadic showers forecast for weekend


BLEAK PREVIEW: A dragonfly struggles to free itself from melting bitumen on a Hyderabad road on Wednesday. Soaring mercury points ominously to a blistering summer ahead. - P.V. Sivakumar

Thiruvananthapuram , April 12

A high-amplitude easterly wave moving in the southern latitudes is set to bring thunderstorms and sporadic showers into the eastern parts of south peninsular India and Central India Saturday onwards to end a prolonged hot and dry spell in the region.

The easterly wave will start affecting the South even as a fresh western disturbance of moderate intensity would have made its presence felt over northwest India, bringing rain and snow in the hills over an entire stretch extending to the northeast.

The easterly wave will be packed with enough moisture to bring the `in-between' regions in north peninsular and central India under a welcome wet cover, said Dr Akhilesh Gupta of the National Centre for Medium Range Weather Forecasting (NCMRWF).

Mercury has been hovering around the 40 degree Celsius-mark in these areas for quite sometime now.

This is now expected to come down significantly (by as much as four to five deg C) with the easterly wave bearing down on the peninsular coast. Much of the North and northwest has already been brought under the soothing influence of a prevailing western disturbance, helping lift heat wave conditions.

The cooler climes are now set to extend to regions further to the South and the East, Dr Gupta told Business Line.

In the Northeast, the continued moisture incursion from the Bay of Bengal has helped sustain the scattered to fairly widespread rains and thundershowers for the third consecutive day. This is set to continue and even gain in intensity over the next four to five days, an NCMRWF forecast said.

Barring parts of Jammu and Kashmir where isolated rain or snowfall activity is expected, almost the entire Northwest may witness mainly dry weather until Friday. The fresh western disturbance approaching the Northwest by Saturday is likely to cause scattered to fairly widespread rains/snow over Jammu and Kashmir, Himachal Pradesh and Uttaranchal for the next three days.

Isolated rains/thundershowers are likely over the adjoining plains of Punjab and Haryana. Heat wave conditions have abated from Jharkhand and Chhattisgarh to the east, as predicted.

In region-wise forecasts, the NCMRWF said scattered to fairly widespread rains have been indicated for most parts of the South, viz. Tamil Nadu, Kerala, Andhra Pradesh and Karnataka from Saturday onwards.

In the east, scattered to fairly widespread rain/thundershowers accompanied by isolated hail/squalls are likely over the Northeastern States, West Bengal and Sikkim during the next three to four days. Isolated to scattered rains are likely in Bihar, coastal Orissa and Jharkhand regions as well.

Chhattisgarh is likely to experience isolated thunderstorm activity during the next two days followed by scattered rains.

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