New Delhi, Dec. 25 -- Brace for a colder spell as large parts of north, east and northeast India are set to witness prolonged dense fog, cold day and cold wave conditions over the coming days, the India Meteorological Department (IMD) said.

But for rabi crops, the prevailing weather remains conducive and is unlikely to have any adverse impact, agricultural scientists said.

According to the latest IMD forecast, dense to very dense fog is very likely to continue during night and morning hours over Bihar till 26 December, Assam and Meghalaya till 27 December, Uttar Pradesh till 29 December, and Punjab, Haryana and Chandigarh till 30 December.

Dense fog conditions are also expected at isolated pockets over Jammu and Kashmir, east Arunachal...