Avalanche Forecast
Issued: Jan 10th, 2015 8:05AM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeConservative decision making is still required given our present avalanches problems.
Summary
Weather Forecast
Conditions will stay cloudy today with isolated flurries bringing trace amounts of precipitation. Expect an alpine high of -2 and westerly winds in the light to moderate range. A ridge of high pressure will begin to dominate the weather pattern for the next several days, although it will remain mostly cloudy until Tuesday.
Snowpack Summary
A sun crust up to 2cm thick is present on steep solar aspects. Recent storm snow has settled to a 45cm soft slab. The storm slab bond to old snow is strengthening, but planar failures are present in stability tests. The December 17th surface hoar on crust layer is down 80-100cm. This layer remains reactive to skier loads on unsupported features.
Avalanche Summary
Natural activity has tapered off since the storm the last storm cycle. A skier controlled avalanche size 1.5 occurred on Thursday on the December 17th surface hoar layer, buried down 60-80cm. This layer has been most reactive around treeline.
Confidence
Due to the number and quality of field observations
Problems
Storm Slabs
This layer has settled into a 40-50cm slab. The bond to old snow continues to improve, but human triggering is still possible in the right location. Use caution on steeper wind loaded features at treeline and above. Note slab changes as you travel.
The new snow will require several days to settle and stabilize.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
The Dec 17 instability is still active and can be triggered by human loads on convex rolls and steep terrain. The surface hoar sits on a thick crust, providing a bed surface for larger avalanches. This layer is widespread at treeline.
Be aware of thin areas that may propogate to deeper instabilites.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 11th, 2015 8:00AM