Persistent slabs rest upon weak, faceted snow and hard snow surfaces. These slabs, with depths up to three feet, could be triggered by skiers and riders in steep, avalanche prone terrain. Some steep slopes may be crossed multiple times before a weak spot is encountered causing failure of the slope.
( Discussion is generated from the previous day's afternoon forecast. )Expect cloud cover to increase overnight before light to moderate snow showers develop in the early morning hours and continue through the day on Sunday. Overnight lows in the mountains will be in the mid teens before rising a few degrees during the day. Southwesterly to westerly ridgetop winds will range from 15 to 25 miles per hour.In the Tetons and the Togwotee Pass area, the General Avalanche Hazard is expected to be MODERATE on Sunday. Backcountry travelers venturing into steep, avalanche prone terrain could trigger persistent slabs with depths of one to three feet. New wind slabs could also develop during the day with depths of six to twelve inches by the evening. Moderate hazard is not a green light. Evaluate the snow and terrain carefully, and identify features of concern. The General Avalanche Hazard is expected to be CONSIDERABLE in the Greys River area where unstable conditions continue to pose a threat to skier and riders recreating in steep avalanche terrain. There, dangerous persistent slabs could be triggered to depths of four feet. New snow will increase the load on underlying weak layers along with creating new shallow wind slabs. Cautious route finding and conservative decision making will be required for safe travel in avalanche terrain on Sunday.
