Photo: J. Schutz
15-16
GNFAC Avalanche Advisory for Thu Mar 10, 2016
Snowpack and Avalanche Discussion
Lionhead area near West Yellowstone
GNFAC Avalanche Advisory for Wed Mar 9, 2016
Snowpack and Avalanche Discussion
Lionhead area near West Yellowstone
This east-facing avalanche was triggered when yesterday's new snow got moist and broke on a layer of facets. The slope was 40+ degrees steep and the crown was only 6-12" deep. Photo: GNFAC
GNFAC Avalanche Advisory for Tue Mar 8, 2016
Snowpack and Avalanche Discussion
Southern Madison Range Southern Gallatin Range
Lionhead area near West Yellowstone Cooke City
This snowpit was dug on a N-NW aspect slope at 8500 feet elevation. The snowdepth was 175 cm and they got ECTP 23 on a layer of facets 65 cm from the surface. They decided to not ski a steep couloir after digging this snowpit. Photo: D. Pogge
From an email, "Photo attached of some recent activity I observed in Pebble Creek today. These thin slides appeared like they ran prior to last night's 3" (and were probably tied to the events of that Fin avalanche/ the strong winds, and very warm temps from a few days ago). I observed 2 recent slab avalanches like the one pictured. Both were NE facing, approx 6-12" deep, and 20-50' wide. Both were mid slope. And I had a small collapse in some low angled shaded terrain adjacent." Photo and obs: B. Fredlund