Tetons

At the upper elevations isolated pockets of shallow wind slab up to a foot deep could be triggered by people venturing into steep avalanche starting zones and cliff areas. The greatest danger from triggered surface slides is likely to be trauma from a person striking obstacles. Avalanches are unlikely at the mid and lower elevations.

The weak weather disturbance will continue to bring snow to the mountains Monday night into Tuesday. By Tuesday afternoon accumulations of four to six inches are expected at mid and upper elevations in the Tetons and two to three inches in the Togwotee Pass area and the Greys River area. Temperatures at 9,500 feet will drop to the low teens by Tuesday morning then warm to the low 20s during the day. Ridge top winds will continue westerly at 25 miles per hour overnight then slow slightly during the day Tuesday. The general avalanche hazard will increase to MODERATE at mid and upper elevations in the Tetons. Easily drifted new, light density snow will form soft surface slabs on lee slopes and in chutes. The new snow will not bond well to weak, faceted snow, sun crusts or wind packed surfaces and triggering slides will be possible. In the Southwest Trails/Greys River and Continental Divide/Togwotee Pass areas the hazard is expected to be LOW as less snow is forecasted. Backcountry users in those areas should remain alert to isolated pockets of surface slab that could be triggered in steep, upper elevation avalanche terrain.