A fresh active 'Western Disturbance' and its associated induced cyclonic circulation is likely to affect northwest Indian region from January 3, and under its influence, fairly widespread to widespread rainfall/snowfall is likely during January 3 to 7 with possibility of isolated heavy rainfall over Jammu and Kashmir on January 4 and 5 and over Himachal Pradesh and Uttarakhand on January 5, the IMD said, adding, isolated hailstorms are also likely over Jammu and Kashmir on January 4 and 5 and over Himachal Pradesh and Uttarakhand on January 5.