|Snow level in Salt Range Monday afternoon|
URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 326 PM MDT Mon Jun 12 2017 ...Late Season Accumulating Snow Expected for Western Wyoming Late tonight and Tuesday... .An unseasonably strong late Spring storm will produce significant snowfall across the Western Wyoming Mountains late tonight and into Tuesday. The low pressure center will be tracking northeast across Yellowstone Park tonight. This low will be producing numerous showers and thunderstorms this evening. Sharply colder moisture laden air will be circulating around the back side of this low as the low tracks northeast into Montana. This much colder air will lower snow levels all the way down to the valley floor at times by Tuesday morning. Snow amounts will likely range anywhere from from 4 to 12 inches above 7500 feet along with some isolated amounts of up to 14 inches in the Tetons by Tuesday evening. 1 to 3 inches of snow is expected to accumulate in the Western Wyoming Valleys by 12 noon Tuesday before melting off Tuesday afternoon. Star Valley- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne 326 PM MDT Mon Jun 12 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MDT TUESDAY... The National Weather Service in Riverton has issued a Winter Weather Advisory for the Star Valley, which is in effect from midnight tonight to noon MDT Tuesday. * TIMING...Numerous rain showers and thunderstorms will begin to mix with snow after midnight. The showers and thunderstorms will transition to more of a steady precipitation after midnight. Episodes of all snow will likely produce 1 to 3 inches of snowfall by 12 noon Tuesday. Mixed snow and rain will become mostly rain for the rest of Tuesday afternoon. * SNOW TOTALS...1 to 3 inches with most of the snow in the northern portion of the valley. * MAIN IMPACT...Highways will become slush covered late tonight and Tuesday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A winter weather advisory for snow means periods of snow will cause primarily travel difficulties. Be prepared for snow covered and slick roads with limited visibilities. Slow down, and allow extra time to reach your destination. Check the latest road conditions at wyoroad.info or by dialing 5 1 1.