There is respite around the corner from the early summer sizzle. After over a week of above normal temperatures, this summer's first heat wave is going to abate due to a Western Disturbance triggered rainfall and a change in wind pattern. An early heat wave, in the last week of March, saw day temperatures rise to 46 degree Celsius in some parts of the country, and it even claimed three lives in Maharashtra.
The India Meteorological Department (IMD) has said in its forecast while the heat wave conditions are 'very likely' to continue for a few more days, it will start abating from the middle of this week. Along with abatement of heat wave, Arunachal Pradesh, Assam and Meghalaya will witness heavy to very heavy rainfall up to Wednesday.
"Heat wave conditions would abate due to likely change in wind pattern over northern parts of the country. Heat wave conditions are also unlikely in the second week (of April), and there will be a fall in maximum temperature over most parts of the country," the IMD's forecast said. It added that a Western Disturbance (WD) that recently moved away from Western Himalayas is likely to bring rainfall in the region, and it may also bring light showers in Delhi-National Capital Region (NCR).
WDs are crucial for snowfall and rains in the upper reaches of the country. These low-pressure systems originate over the Mediterranean, Caspian and Black Seas and move eastwards across north and northwestern India, following the westerlies. "One WD has moved away and another is one its way. This is going to bring rainfall in the hill states, and bring down mercury in the plans of Northwest and North. Even in central and western parts of India, maximum temperatures will come back to normal," said M Mohapatra, director general, National Weather Forecasting Centre.
IMD's analysis showed that an early heat wave also seemed to have affected the rainfall in March. In central and northwest India, where heat wave most severe, the rainfall deficit for Match was 33 per cent and 39 per cent respectively.
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WDs are crucial for snowfall and rains in the upper reaches of the country. These low-pressure systems originate over the Mediterranean, Caspian and Black Seas and move eastwards across north and northwestern India, following the westerlies. "One WD has moved away and another is one its way. This is going to bring rainfall in the hill states, and bring down mercury in the plans of Northwest and North. Even in central and western parts of India, maximum temperatures will come back to normal," said M Mohapatra, director general, National Weather Forecasting Centre.
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