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LATEST NEWS UPDATES | What's behind the intense storms battering North West India? Experts divided, call for more research

What's behind the intense storms battering North West India? Experts divided, call for more research

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published Published on May 25, 2018   modified Modified on May 25, 2018
-Scroll.in

Some believe the ‘peculiar’ thunderstorms and dust storms are because of a change in the pattern of winter storms, or rising heat.

Several of India’s northern states – particularly Uttar Pradesh, Rajasthan and Delhi – have experienced a spate of severe thunderstorms and dust storms with strong winds and lightning in the past month. The storms have killed over 124 people and left a trail of devastation.

According to the Indian Meteorological Department, the thunderstorms in North West India this year are peculiar. “[The] peculiarity of thunderstorms this season is the heating in North West India that has coincided with the movement of western disturbances,” said KJ Ramesh, director general of meteorology at the India Meteorological Department.

A western disturbance is a storm that originates in the Mediterranean region, carries moisture from the Mediterranean Sea, Atlantic Ocean, Caspian Sea and the Arabian Sea and travels from west to east. Also described as an area of reduced air pressure, it is commonly associated with precipitation (rain, snow, hail) in North India during the winter months. Ramesh said the frequency of western disturbances was low this winter but that they are now “happening back to back”.

And it is these western disturbances that have reportedly triggered the thunderstorms in North West India, with some remnant impact in eastern India. “These thunderstorms move from west to east and there is more moisture incursion from the Bay of Bengal that sustains these storms,” Ramesh said.

North East India and East India are no strangers to thunderstorms in the April to June period, which is referred to as Kal Baisakh, where kal refers to Yam, the god of death. It is associated with violent thunderstorms and lightning that often cause destruction and kill people. The storms are called Kal Baisakhi or nor’westers. The frequency of these storms is usually highest in the North East (30 days to 40 days between March and May).

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Scroll.in, 24 May, 2018, https://scroll.in/article/879493/whats-behind-the-intense-storms-battering-north-west-india-experts-divided-call-for-more-research


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