The Hindu Business Line : Heat wave conditions in North likely to continue

Thiruvananthapuram, April 29 The barren outbacks of Saurashtra and Kutch in Gujarat, apart from West Rajasthan, represented the hottest spots during the last 24 hours as severe heat wave conditions thrived in these regions under totally cloudless skies.

According to India Meteorological Department (IMD), heat wave conditions also prevailed in East Rajasthan, West Uttar Pradesh, Haryana, Punjab, Madhya Pradesh, Madhya Maharashtra, Vidarbha, Jharkhand, Punjab and Chhattisgarh.

WESTERLY COMFORT

In this manner, practically the whole of west, northwest, central and east-central parts of the country have been brought under a heat wave of varying intensity. A western disturbance expected to roll in by the weekend could provide some relief in the west and northwest.

The IMD outlook for the next two days has warned of severe heat wave conditions over Rajasthan, Saurashtra and Kutch. Heat wave conditions have also been forecast over Punjab, Haryana, Delhi, Gujarat, Madhya Pradesh, Chhattisgarh, Vidarbha and Jharkhand.

BARMER TOPS

In its update, the IMD said the maximum temperature had increased by about 1 to 2 deg Celsius over northwest, central and adjoining east India during the past 24 hours. The highest maximum temperature of 46.0 deg Celsius was recorded at Barmer in Rajasthan.

International models maintained the outlook for an earlier-than-normal onset of southwest monsoon with individual models seeing enhanced probability for above normal rainfall for West-central and adjoining Central India.

Simultaneously, these models have predicted less than normal rainfall for Northwest India and Northeast India.

Dr Akhilesh Gupta, Senior Adviser to the Ministry of Science and Technology, is of the view that these forecasts betray an inbuilt “model bias” with respect to evolving weather in these two regions.

This stems from the fact that they are not able to properly “simulate” the weather-altering western disturbances entering Northwest India. At least 40 to 45 per cent of the monsoon rainfall in the region is caused by the interaction between western disturbances and monsoon systems.

On the other hand, the Northeast has been showing a growing trend for “perpetual deficit” in monsoonal rains down the years. This has come in for reference by even the Inter-Governmental Panel on Climate Change (IPCC).

PERSISTING TROUGH

A north-south oriented trough has sprung up afresh over East India linking Bihar southeast to North Bay of Bengal. This will aid thunderstorm activity and bring down mercury in the region during the next four days.

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