The IMD has issued dense fog warning for several states and UTs, including Himachal Pradesh, Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura, for Thursday. Ground frost conditions and severe cold wave are likely over Himachal Pradesh. Thunderstorm is likely over Rajasthan, Madhya Pradesh, Maharashtra, Gujarat, Tamil Nadu and Puducherry.