Periods of light to moderate snow in the western mountains and valleys this Thanksgiving day and evening. Additionally, expect mostly cloudy and breezy conditions east of the divide. On Friday and Saturday a more potent system with heavier snow will move into the area, including areas east of the Continental Divide. Combined with strong winds, possible severe winter conditions could exist across the west. Travel could be hazardous Friday night and Saturday across much of the state, including on Interstate 80.