Tetons

Backcountry travelers could release isolated pockets of wind slab up to one foot in depth on very steep avalanche-prone terrain. Pockets will grow with significant wind and new snow. Be alert to increasing hazard from new snow falling on weak, faceted surfaces and crusts. Extra caution is required just below ridge tops, in cliff areas, above terrain traps and in extreme terrain. Low hazard does not mean no hazard.

Weak high pressure over the mountains will keep conditions fairly dry Tuesday night then a plume of Pacific moisture will begin to bring snowfall to the region with widespread snow in the morning. Snowfall will increase in the afternoon with rapid snow accumulations. Winds will be westerly at 20 miles per hour in the morning then increase to 30 miles per hour in the afternoon with the heavier snowfall. Mountain temperatures will be warm with daytime highs in the upper 20s and above freezing with possible rain on the valley floors. The general avalanche hazard is expected begin at LOW in the early morning but will rapidly increase in all mountainous areas in the region as new snow and strong winds increase. Easily triggered slabs will be growing in size during the day and it is likely that dangerous slides could be human triggered on a variety of aspects by late afternoon. The warm, new snow will be falling on Tuesday's light density snow that rests on a weak faceted snowpack that will not support significant loading.