Moist flow off the Pacific Ocean is again expected to impact western Wyoming beginning tonight in the mountains and early New Year's Day in the valleys. The nearly continuous plume of moisture is expected to spread across this part of Wyoming through late Friday. Early indications are that one to two feet of snow will fall in the Teton, Salt River, Wyoming, and Gros Ventre ranges. Similar amounts are anticipated across the south half of Yellowstone National Park. The Star Valley, Jackson Hole, Bondurant Valley, and the far northern portion of Yellowstone National Park can expect snow amounts of six to twelve inches.
This storm has the potential to significantly impact holiday weekend travel through western Wyoming. Teton Pass will again be inundated with new snowfall. The avalanche danger will also need to be monitored as it is likely to increase with the new snowfall and expected gusty wind. The most recent avalanche forecast from the Bridger-Teton National Forest Avalanche Center can be found by clicking here. To keep up-to-date on current developments with the winter storm, be sure to read the most recent winter weather message from the Riverton NWS office.