The higher reaches of Kullu, Lahaul-Spiti, Kinnaur and Chamba have been experiencing mild snowfall since Wednesday morning triggering cold waves in the valleys. With mercury settling at -0.6 degree Celsius, Keylong in Lahaul-Spiti was the coldest inhabitant region of Himachal this season. A fresh white sheet of snow has covered Seven Sister peaks, Hanuman Tibba,