Avalanche Forecast
Issued: Jan 22nd, 2018 4:00PM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeGood ski conditions at treeline and below today. The snowpack this year is complex with multiple weak layers. Manage your risk by sticking to simpler terrain.
Summary
Weather Forecast
We are in the influence of a SW flow with a series of storms moving in off the coast. Expect light snow ~ 5-10 cm per day for the next three days. Temps will be cool in the -5 to -15 range with Wednesday being the warmest and winds generally light to moderate from the SW.
Snowpack Summary
Recent winds have developed windslabs on alpine lee slopes. In sheltered areas, 25- 40 cm of snow overlies the Jan 16 layer (the first of 3 weak layers). The Jan 6 is below this and is 40 -60 cm down and the Dec. 15 is deeper yet at 60-80 cm down. Each of these layers are a mix of surface hoar, facets and sun crust depending on aspect and elevation
Avalanche Summary
No new avalanche activity reported in this forecast region.
Confidence
Intensity of incoming weather systems is uncertain
Problems
Wind Slabs
Recent snow and wind are have created new windslabs on lee slopes in the alpine.
If triggered the wind slabs may step down to deeper layers resulting in large avalanches.Use caution in lee areas. Recent wind loading has created wind slabs.
Aspects: North, North East, East, South East.
Elevations: Alpine.
Likelihood
Expected Size
Persistent Slabs
There are 3 weak layers in the upper snowpack: Jan. 16, Jan 6 and Dec. 15. They are a mix of sun crust, facets and surface hoar depending on aspect and elevation. Avalanches initiated in any of these layers will likely step down to the Dec. 15 layer
Avoid open slopes and convex rolls at treeline where buried surface hoar may be preserved.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Jan 23rd, 2018 4:00PM