Humans could trigger large slab avalanches in steep avalanche terrain at the mid and upper elevations. These slab avalanches could be large enough to bury and kill a skier or rider. Even small avalanches in extreme terrain can cause significant injuries. Warm temperatures and periods of sunshine will also increase the wet snow avalanche hazard. Wet slides are possible on steep sunlit aspects at all elevations and on all aspects at the lower elevations after snow surfaces soften. Evaluate the snow and terrain carefully and be ready to adjust travel plans, especially if rapid warming of the snow surfaces is occurring.
At the mid and upper elevations humans who venture into steep avalanche starting zones and avalanche prone terrain features could trigger dense slab avalanches 1 to 3 feet in depth. These slabs may become more sensitive to human triggers during the warmer portion of the day.
Wet slides are possible, especially during the warmest portion of the day. At the mid and upper elevations these slides are possible on steep sunlit aspects and will likely only involve the recent new snow. At the lower elevations these slides could dig down to older snow layers on very steep snow covered slopes where today's warm temperatures and heat create areas of unconsolidated iso-thermal snow.
Moisture will surge north into Western Wyoming as the low moves into the Great Basin. On Wednesday skies will become overcast. Light snow may develop and favor the Greys River area and the Togwogtee and Union Pass areas. A couple inches of snow are possible at the higher elevations. Temperatures are forecast to fall into the upper teens and 20’s in the mountains and into the 20’s at the lower elevations. Daytime highs will be in the 30’s in the mountains and near 40 degrees in the valleys. Winds will be from the southwest at 5 to 15 miles per hour.Some pockets of slab up to two feet in depth may persist on the cooler aspects at the higher elevations in the Teton Range. The wet snow avalanche hazard will be dependent on how hard snow surfaces freeze overnight, especially at the lower elevations. Assuming snow surfaces freeze, the general avalanche hazard is expected to be low in the morning hours in all areas below an elevation of 9,000 feet. The hazard above that elevation is expected to be moderate in the Teton and Togwotee Pass forecast zones and low in the Greys River area.
