12-13
Forecast link: GNFAC Avalanche Advisory for Wed Feb 20, 2013
GNFAC Avalanche Forecast for Tue Feb 19, 2013
Snowpack and Avalanche Discussion
Northern Gallatin Range
This avalanche was triggered on Saturday (16 Feb). The crown was 1-2 feet deep and 150+ feet wide. The avalanche broke on a layer of small-grained facets on an ice crust. Photo: B. Fredlund
A skier triggered this small avalanche on a southwest facing slope on Monday afternoon (18 Feb). Photo: B. Fredlund
GNFAC Avalanche Advisory for Mon Feb 18, 2013
Snowpack and Avalanche Discussion
Bridger Range
The Bridger Range has received 16 inches of new snow over the past 48 hours. Although winds have been relatively light during this storm, isolated wind slabs should be expected on leeward slopes below the ridgeline. A more common problem today will be loose snow avalanches. On steeper slopes, fast moving sluffs will carry enough volume to push or potentially burry a skier or rider.
A layer of facets buried mid pack is the layer of concern. Although it's taking hard force to get this layer to fail, it continues to propagate in stability tests. This layer should be assessed before committing to avalanche terrain. Photo GNFAC