Strong velocity icy winds swept across the region and thick fog engulfed mid and lower hills reducing visibility considerably and vehicles had to move at a slow pace with headlights on during the day.
Avalanche threat loomed large over high altitude tribal areas and people living above an altitude of 2,500 metres have been advised not to venture out till the weather conditions improved.
Fresh snowfall blocked roads in the interior areas and about 80 roads in Kinnaur, Shimla, Mandi, Kullu, Kangra and Chamba districts were closed due to snow while 25 roads were cleared by the Public Works Department today.
"We hope to clear all the roads by tomorrow if there is no fresh snowfall," said Ajay Garg, Superintending Engineer (Works).
The entire tribal belt of Lahaul and Spiti, Kinnaur, Pangi and Bharmaur, Dhauladhar and Churdhar ranges and an Rohtang and Kunzam passes are experiencing intermittent heavy snowfall since last night while mid and lower hills are experiencing intermittent rains.