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Mercury plunged to zero in Amritsar, Punjab overnight on Monday as a severe cold wave and dense to very dense fog took strong hold of regional weather.
Cold wave to severe cold wave conditions are prevailing over many places over east Madhya Pradesh, Vidarbha, east Rajasthan, Odisha and Marathwada.
Very dense fog enveloped most places over Punjab, Haryana, Delhi, Uttar Pradesh and Bihar. Dense fog covered an entire stretch extending from Rajasthan right into extreme east India.
Visibility was reduced to 50 m or less at Amritsar, Patiala, Ludhiana, Ambala, Delhi, Lucknow, Bahraich, Sultanpur, Gorakhpur, Gwalior, Ganganagar, Meerut, Agra, Satna, Rewa, Sidhi, Hissar, Jhansi, Tikamgarh, Damoh, Fursatganj, Varanasi, Gaya, Patna and Bhagalpur.
Night temperatures plunged in Vidarbha, Jharkhand, Chhattisgarh, Madhya Pradesh, Marathawada, Odisha, and east Rajasthan.
They were below normal at many places over west Maharashtra, including Konkan, Goa and Madhya Maharashtra.
Westerly awaitedNight temperatures are to perk up from the last day of the year by when an incoming deep western disturbance starts affecting north-west India.
Accompanying winds will help clear the air of the fog and trigger rain of varying amounts over the plains of north-west India.
The rain regime will then move to central, east and south-east India.
This happens as a result of westerly system interacts with a well-marked ‘low’ off north Sri Lanka and adjoining Tamil Nadu, which is forecast to intensify as a depression.
Ground frostSome moisture from the westerly system can linger after its passage to the east with the ‘low’ in tow. This moisture can create fog later as the air stalls over the plains of north-west India.
Night temperatures are above normal only at places over peninsular India already under the influence of the well-marked ‘low.’
Meanwhile, India Met has forecast ground frost over Punjab, Haryana, Delhi and north Rajasthan. It goes on to warn about the possibility of hailstorm in the New Year over Madhya Maharashtra, Marathawada and Madhya Pradesh.
The trigger will be the thunderstorms expected over central India and parts of east and peninsular India .
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