Another round of wintry weather is forecast for the weekend, as another ‘atmospheric river’ moves through the coastal area. Rain and snow is expected Sunday evening with snow expected at 3,500 feet, but snow levels may drop as low as 1,000’ or lower in parts of interior Mendocino and Lake counties. NWS is anticipating 20% chance of snow in Ukiah and interior Lake County, and up to 60% chance of snow in Laytonville and northern interior parts of Mendocino, which means a number of highways including U.S. Highway 101, and State Route 20 and 175 may be significantly impacted by the winter storm.