By National Weather Service in Cheyenne, WY
As much of the area continues to see light rain and freezing drizzle early this afternoon, expect a transition to all snow here shortly.
Heavier precipitation bands are moving up from Colorado where moderate to heavy snowfall is already being reported.
Winds will increase later tonight across much of the area and therefore Blizzard Warnings have been expanded to include Cheyenne and Sidney starting at 11 PM MST Saturday.
Travel will become extremely dangerous if not impossible once the heavy snow begins and especially later tonight into Sunday.