As many as 835 roads, including three national highways, remained closed for traffic movement in Himachal Pradesh on Sunday, as a result of heavy snowfall. Meanwhile, the meteorological department has predicted that a fresh western disturbance is likely to cause heavy snowfall in the higher reaches of the State from Monday. According to the State Emergency Operation Centre, about 282 roads, including NH 3 (Leh-Manali) and NH 505 (Kaza-Gramphu), are blocked in Lahaul and Spiti.