22-23

Riders observed a natural, dry slab avalanche that occurred last week on a northerly aspect near the Sphinx. 

Approx coordinates of slide #1: 45.15872, -111.46923

Photo: L. Welles

Riders observed a natural, dry slab avalanche that occurred last week on a northerly aspect near the Sphinx. 

Approx coordinates of slide #1: 45.15872, -111.46923

Photo: L. Welles

Riders observed a small, full-depth wet snow avalanche on a southerly aspect near Pioneer Mountain. Photo: L. Welles

Had some loose wet slides on the fin today just after noon. Was about 3-6” deep at the new/old snow interface. Slide was slow moving but carried farther than we thought. 

Observed evidence of natural slide activity yesterday while snowmobiling Buck Ridge. First pics are on a northerly aspect off Sphinx near the wilderness boundary, second set of pics are south facing off Pioneer Mtn.

Approx coordinates of slide #1: 45.15872, -111.46923

Approx coordinates of slide #2: 45.22781, -111.46531

Was able to spot a deep slab avalanche from Gallatin peak, slab was at the headwaters of S Fork Hellroaring (N aspect @ 9800) Hard to tell when this released as it was a few miles away, I would estimate the crown being around 10 feet. Observed a small storm slab on a north aspect as well (1-2 foot crown). Also saw a few dozen wet slides that released earlier this week, some tearing all the way to the ground. 

This afternoon my group triggered a dry-loose avalanche on the north face of Big Timber Peak in the Crazies. The slide was about 12 inches deep, 50 feet wide, and ran about 1,000 vertical feet. Thankfully, no one was injured. We didn’t officially measure the slope angle but we’re estimating it to be in the 38-degree zone—prime avalanche territory. The slide consisted of new snow that fell during this recent storm. It hadn’t bonded to the thick crust underneath and released during the second skier’s run.