Tetons

Several inches of dry, loose snow rest upon hard crusts from late November. With the exception of a few isolated pockets of shallow soft slab near upper elevations ridgelines, the snowpack is mostly stable. Avalanche activity below the late November crusts is unlikely, and the lower elevations are mostly free of snow.

The National Weather Service has issued a Winter Storm Warning effective from midnight on Saturday through 5 AM Monday morning. A Pacific low pressure system will begin to impact the region Saturday night and continue through the day on Sunday. Strong southwesterly ridgetop winds at 20 to 30 miles per hour will accompany this snowfall. Overnight lows in the mountains will be in the low 20s before rising a few degrees during the day.The general avalanche hazard is expected to be LOW Sunday morning and steadily increase as new snow and strong southwesterly ridgetop winds form new wind slabs. As the day progresses, the avalanche hazard will increase to MODERATE, and an extended period of rapid loading could significantly increase the hazard. Skiers and riders will become increasingly likely to trigger these newly developed slabs failing on the late November crusts or faceted snow near and above the crusts. Monitor weather conditions, and utilize an increasingly conservative approach to terrain selection throughout the day.