Due to Western Disturbances as an upper air cyclonic circulation over Afghanistan & adjoining Pakistan extending upto 7.6 km now seen as a trough roughly along Longitude 68°E to the north of Latitude 25°N at 5.8 km above mean sea level.

The trough from north Madhya Maharashtra to south Rajasthan across Gujarat region at 0.9 km above mean sea level persists.

Dense this very dense fog at a few places very likely over Punjab, Haryana, West Uttar Pradesh, north Rajasthan and at isolated places over Nagaland, Manipur, Mizoram & Tripura; dense fog at isolated places over Jammu division of Jammu & Kashmir, lower regions of Himachal Pradesh and Uttarakhand and moderate to dense fog at isolated places over SubHimalayan

Cold wave conditions very likely at isolated places over lower regions of Jammu & Kashmir, Himachal Pradesh and over Punjab, Haryana, West Uttar Pradesh and West Rajasthan.

Cold day conditions are very likely at isolated places over Punjab, Haryana, north Rajasthan and West Uttar Pradesh.
16 December (Day 2): Dense fog at isolated places very likely over Punjab, Haryana and north Rajasthan;
Severe cold wave conditions are at isolated places very likely over Punjab, Haryana and West Rajasthan and cold wave conditions at isolated places over Jammu & Kashmir, Himachal Pradesh, West Uttar Pradesh and East Rajasthan.

Cold day conditions at isolated places very likely over Punjab, Haryana, north Rajasthan and West Uttar Pradesh.
17 December (Day 3): Moderate to dense fog at isolated places very likely at isolated places over Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, north Rajasthan, Uttar Pradesh, Nagaland, Manipur, Mizoram & Tripura and Assam & Meghalaya.
Severe cold wave conditions at isolated places very likely over north Rajasthan and cold wave conditions at isolated places over Punjab, Haryana and Uttar Pradesh.

Ground frost very likely at isolated places over Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, Chandigarh & Delhi, north Rajasthan and west Uttar Pradesh.

18 December (Day 4): Moderate to dense fog at isolated places very likely over Punjab, Haryana, north Rajasthan, Uttar Pradesh, Nagaland, Manipur, Mizoram and Tripura.