May 10, 2021
2 mins read

IMD says heatwave conditions won’t set in till May 18

There were seven western disturbances which moved across western Himalayan region in March against the normal of four WDs…reports Asian Lite News

The India Meteorological Department (IMD) said an unusually high number of western disturbances in March, April and now in May has subdued the searing heat normally felt in April and May.

It said that similar conditions are likely to persist till around May 18, the Hindustan Times reported.

The IMD said it is not expecting heatwave conditions to set in till May 18. “There was no heatwave in May till now. We are not expecting heatwave conditions to set in till May 18. On May 10, 11 and 12, rain and thunderstorms are likely over northwest India under the influence of an intense western disturbance,” the HT quoted RK Jenamani, senior scientist, national weather forecasting centre, as saying.

There were seven western disturbances which moved across western Himalayan region in March against the normal of four WDs. Of these, three were very active, bringing rainfall, snowfall and thunderstorm to the region, it was reported.

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April saw nine WDs move across western Himalayan region against the normal of four to five WDs. Four of them were active and moved as cyclonic circulations, bringing rain and thunderstorms to the hills and plains. There were two WDs in May and another expected to impact the region from Tuesday.

In March, severe heatwave was recorded over west Rajasthan and heatwave conditions over east Rajasthan, Odisha, Gangetic West Bengal, coastal Andhra Pradesh and Tamil Nadu. In April, however, the heatwave was occasional and for shorter periods over smaller pockets.

This is mainly because of wet spells over the western Himalayan region and adjoining plains of northwest India and central India on many days due to the movement of WDs. No heatwave was recorded in May, the report quoted IMD.

HT also quoted Jenamani as saying that with the likely arrival of monsoon over Kerala on June 1, further heatwave conditions are unlikely over Peninsular India.

The average maximum, minimum and mean temperature in April was 34.52 degree C, 22.33 degree C and 28.42 degree C, respectively, against the normal of 33.94 degree C, 22.15 degree C and 28.04 degree C based on the average for 1981-2010 period.

In March, the maximum, minimum and mean temperature was 32.65 degree C, 19.95 degree C and 26.30 degree C, respectively, against the normal of 31.24 degree C, 18.87 degree C and 25.06 degree C.

A fresh western disturbance is likely to affect western Himalayan region and plains of northwest India from May 11 onwards. Under the influence of this WD and its interaction with easterly winds and moisture feed from Arabian Sea, fairly widespread rainfall or thundershowers are very likely over western Himalayan region and isolated rainfall/thunderstorms is likely over plains of northwest India on May 11 and 12 with maximum intensity on May 12 and 13. Isolated heavy rainfall is also likely over Himachal Pradesh and Uttarakhand on May 12 and 13, according to the report.

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