Photos

A skier intentionally triggered an avalanche in Argentina bowl below south Saddle Peak. The avalanche broke 2 feet deep and ran 1000–2000 vertical feet piling debris 20 feet deep in the run out zone and breaking trees. Photo: anonymous

A skier intentionally triggered an avalanche in Argentina bowl below south Saddle Peak. The avalanche broke 2 feet deep and ran 1000–2000 vertical feet piling debris 20 feet deep in the run out zone and breaking trees. Photo: anonymous

A skier intentionally triggered an avalanche in Argentina bowl below south Saddle Peak. The avalanche broke 2 feet deep and ran 1000–2000 vertical feet piling debris 20 feet deep in the run out zone and breaking trees. Photo: anonymous

A skier intentionally triggered an avalanche in Argentina bowl below south Saddle Peak. The avalanche broke 2 feet deep and ran 1000–2000 vertical feet piling debris 20 feet deep in the run out zone and breaking trees. Photo: anonymous

On Jan 5 we saw this ~150' wide, 1'deep storm slab in Truman Gulch. GNFAC

On Jan 5 With decent visibility we drove up Bridger canyon to Battle Ridge to look for recent avalanches. The most noteworthy was a slab 500'+ wide, 2'+ deep in Argentina Bowl (photo), 1 day old probably. Photo: GNFAC

The one thing of note was a recent avalanche on the north face of Blackmore. Visibility was poor but it was a small pocket in a steep, rocky zone that broke near the ground. Photo: H Darby

Small cornice build up on lee aspects from north winds. Photo: H Darby 

There was recent avalanche on the north face of Blackmore. Visibility was poor but it was a small pocket in a steep, rocky zone that broke near the ground. Photo: H. Darby

We experienced a remarkable number of thunderous collapses throughout the day (I lost count), one of which triggered an avalanche into Specimen Creek while we were in the flats. Photo: R Parsons

Pit 2

44.95982, -111.09903

100cm snow depth

ECTP17. Failed on faceted layer 30cm above the ground. 

sugary fist snow 20-30cm above the ground; somewhat consolidated 4F storm slab 30-60cm; powder fist snow 60-95cm

Photo: R Cocco

Toured up northwest of the bacon rind trailhead to the ridge. Did two pits, both with similar failures on the buried weak layer during ECT.

Pit 1

44.96190, -111.08941

95cm snow depth ECTN21. Failed on faceted snow that existed 23-35cm above the ground.

Photo:R Cocco

From IG Jan4, Photo: J. Urell

From IG Message Jan 4."They happened today because I did not see the debris on way in". Photo: T. Urell

Photo: H Meyers 

Photo: H Meyers

Saw a small recent looking storm slab avalanche that appeared to be naturally triggered above the road on a south facing slope around 6000'.  It ran all the way across the slope ~30' wide and  ~4" deep within the recent snow.  The snow didn't move far enough to reach the road.  The slope was quite steep-- we didn't measure but I'd estimate 40*.

Photo: H Meyers

Remote triggered this avalanche at Lionhead. We were snowmobiling to the left of where the avalanche occurred. No one was caught.

Coordinates: 44°43'36.8"N 111°19'05.0"W

Photo: Ben 

We triggered a wind slab. It propagated about 200 ft wide and was 3 ft at the deepest point. Interestingly on the edges and near the bottom (downhill side) of the slab it was only a few inches deep. It broke on the interface between the wind loaded snow and the light and dry snow we received a few days ago. Photo: A Shafer