Avalanche Forecast
Issued: Dec 19th, 2017 4:17PM
The alpine rating is Storm Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Moderate - Intensity of incoming weather systems is uncertain
Weather Forecast
After Tuesday's storm it will clear up and we'll have dry weather with cool temperatures for the foreseeable future.WEDNESDAY: Sunny with occasional cloudy periods. Ridge wind moderate northerly. Freezing level at the surface, alpine high temperatures of -4.THURSDAY: Some clouds and isolated flurries. Ridge wind moderate from the north west. Temperature near -3. Freezing level 400 m. FRIDAY: Sunny. Ridge wind moderate from the north east. Temperature near -10. Freezing level at the surface.
Avalanche Summary
On Tuesday, reactive soft slabs were reported on southerly terrain features at treeline. See here for details in the Mountain Conditions Report. Small steep features below tree line were also running naturally to Size 1 on a layer just above the Dec 15th melt-freeze crust. Ski cutting produced several storm slabs up to Size 2 at higher elevations. Also on Monday, we had reports of reactive wind slabs on steep north-facing slopes. See here for the MIN report.
Snowpack Summary
Up to 20 cm of low-density snow fell on Tuesday, accompanied by moderate to strong north west winds. Soft slabs 20-40cm thick were reactive to human traffic.There is now 30-50cm of snow sitting on a melt-freeze crust that formed on all aspects and elevations in early December. On high north aspects this crust is thin with dry, sugary snow crystals (facets) below. The lower snowpack is well settled and consists of several crusts that formed in the early season.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 20th, 2017 2:00PM