...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 PM MST FRIDAY... * WHAT...Snow expected. Total snow accumulation 1-5 inches below 5000 feet, 4-8 above 5000 feet, with up to 8-12 inches in high elevation passes and summits. Snow levels rise Friday, mountain towns could see a switch from snow to rain. Gusts increase to 20-30 mph Friday night. * WHERE...Boise Mountains and West Central Mountains. * WHEN...From 5 PM this afternoon to 11 PM MST Friday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Locally heavy snowfall will limit visibilities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. &&