Fog observed at 0830 hours IST of 20-01-2021: Dense to Very Dense fog observed in some pockets over East UP and Bihar and in isolated pockets Punjab, west Rajasthan, West MP, Sub Himalayan West Bengal and Moderate to Dense fog observed at a few pockets over Haryana, Chandigarh and Delhi.

Visibility (in meters) Observed at 0830 hrs IST of 20-01-2021 as following:-

 25- Amritsar, Bahraich and Lucknow.

 50- Chandigarh, Dehradun, Pantnagar, Rajgarh, Bhagalpur, Purnea, Gaya, Patna, Fursatganj, Gorakhpur, Gangtok, Sultanpur.

 200- Ludhiana, Patiala, Hissar, Bhiwani, Safdarjung and Nowgong.