Heavy snow. Timing: 4 PM Saturday February 4 – 10 PM Sunday February 5, 2023. A map shows the area of a winter storm watch for the Sierra up through the eastern Shasta County mountains above 4,000 feet. Forecast: Above 6,000 feet: 15-30 inches of snow. Above 4,000 feet: 6-15 inches of snow. Precautions: Significant reductions in visibilities at times. Major travel delays likely. Chain controls likely. Road closures possible. Travel is highly discouraged.