IMD Update: Western disturbance to form severe heat wave over North-West India

Incoming western disturbance has forced dry and hot conditions (in golden yellow) to a belt around Mumbai, Nashik, Aurangabad and Solapur on Thursday morning.
| Photo Credit:
www.meteologix.com/in

An incoming western disturbance in the form of a weather-making trough has moved in from southern Iran into West Pakistan this (Thursday) morning and spawned a cyclonic circulation over West Rajasthan apart from a secondary trough directed towards East-Central India. Cooler winds associated with these systems will douse heat briefly over North and West India. 

Severe heat wave conditions prevailed on Wednesday over Rajasthan, at a few places over Saurashtra & Kutch and south Haryana while heat wave conditions hit Himachal Pradesh, Delhi, West Uttar Pradesh, Gujarat and Madhya Pradesh. 

Daytime mercury trend

India Meteorological Department (IMD) expects maximum (day) temperatures to fall by 2-4°C over North-West India, Gujarat and Maharashtra during next three days, before warming up again in subsequent three days after disturbance leaves to the east and its effect wears off. Maximum temperatures may fall by 2-4°C over West India as well during next four days. 

Its size and extent will help disturbance exert influence over rest parts of northern half of the country, with a secondary originating from it rough and running down from West Rajasthan to north-west Vidarbha. This trough will attract warm and moist easterlies from the Bay of Bengal, which will set up convergence with cooler winds from the disturbance. 

Rain, thunderstorms

Lower pressure in trough will allow moist air to rise into heights and cool to precipitate as rain and thunderstorms along with high winds, lightning and hail. IMD sees scattered to fairly widespread moderate rainfall, thunderstorms, lightning and gusty winds (40-50 km/hr) over Jammu-Kashmir-Ladakh; and isolated to scattered rainfall over Himachal Pradesh and Uttarakhand. 

Isolated rainfall is likely over plains of North-West India and isolated hailstorms over Himachal Pradesh and Uttarakhand. Dust storms may rear over West Rajasthan and thunder squalls (wind speeds of 50-60 km/hr) over Uttarakhand. 

Well-marked ‘low’ weakens

Prevailing well-marked low-pressure area has weakened over west-central Bay and its remnant may move over waters and weaken further. A trough ran down from here to south Tamil Nadu while another looked out from south-east Madhya Pradesh to plains of West Bengal across Chhattisgarh and Jharkhand. A lone cyclonic circulation hung over northwest Madhya Pradesh.

Heavy rain for East India

These systems may combine to bring heavy rainfall over parts of Bihar, Arunachal Pradesh, hills of West Bengal & Sikkim and Assam & Meghalaya. Isolated to scattered moderate rainfall, thunderstorms, lightning and gusty winds (50 km/hr) are likely over Tamil Nadu, Puducherry & Karaikal; Coastal Andhra Pradesh & Yanam; Kerala & Mahe; Coastal Andhra Pradesh & Yanam; Telangana, Karnataka, Central India, East and North-East India. Isolated hailstorms may stalk Jharkhand. 

Published on April 10, 2025

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