As the jet stream takes a more northern positioning, Jackson Hole is on the southernmost storm track and from the looks of it– the Tetons are about to get some serious high elevation snowfall.
While it rains in the valley, expect intense snowfall up high with some NOAA models calling for over 2 feet of new snow by Saturday morning.
“Areas of Heavy Snow is possible over the Northwest mountains today and Friday along with mixed rain and snow in the lower valleys” – NWS Riverton
Gusting winds and blowing snow will create deep pockets of unstable snow. Those venturing beyond the gates should exercise extreme caution when traveling in avalanche terrain over the next 3 days. #KBYG
Winter Storm Warning
…A winter storm will bring heavy snow and blowing snow across the western mountains of Wyoming through Friday…
Pacific moisture along with strong west northwest winds aloft will produce periods of heavy snow with strong gusty winds producing areas blowing and drifting snow through Friday. The valleys will have rain or rain mixed with snow at times through the day Friday.
…WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY…
* TIMING…Periods of snow, heavy at times…especially tonight through Friday morning…with strong winds producing blowing and drifting snow.
* Snow Accumulations…12 to 28 inches, with the highest amounts over the Tetons.
* Wind and Visibility…southwest wind of 20 to 35 mph gusting 40 to 50 mph causing blowing and drifting snow with visibility below a quarter of a mile at times.
* MAIN IMPACT…Snow will produce slick, snow packed and icy roads making travel difficult. Poor visibility will also make travel difficult including Teton and Togwotee Passes.
* OTHER IMPACTS…Outdoor recreation in the back country may be very hazardous with poor visibility and heavy snowfall.