Watch for blowing snow throughout the day. New thin wind slabs could form during the day.
Lingering wind slabs from previous outflow exist on a variety of aspects. They are generally becoming less reactive. In addition to these older wind slabs new ones could form throughout the day on Tuesday , these wind slabs will likely be easier to trigger but will likely be small and less consequential.
Minimal avalanche activity has been reported since the natural cycle of wind slab avalanches occurred during the initial onset of outflow winds on Wednesday (Nov 30).
A new layer of surface hoar and facets has formed on the snow surface. It is possible that a new crust has formed as well. This crust may be found on steep southerly aspects and at higher elevations after the recent temperature inversion and clear skies.
Last week strong outflow winds scoured easterly slopes, created hard slabs on west and south slopes, and cross-loaded others.
A layer that formed in mid-November can be found down 70 to 100 cm deep at treeline and above. This layer consists of a crust below 1200 m and a layer of surface hoar above this elevation. This layer has not shown recent signs of instability.
The depth of the snowpack at treeline varies widely from 100 to 200 cm and tapers rapidly below treeline. Many early-season hazards such as rocks, stumps, and open creeks exist below treeline.
Monday Night
Flurries starting tonight with trace amounts of new snow expected. Outflow winds decreasing and becoming westerly by early morning. Temperature inversion continues with -8 around 1500m.
Tuesday
Stormy with 10cm expected. Strong westerly winds. Temperature inversion breaks down with around -8 at 1500m and -6 near valley bottom.
Wednesday
Stormy with 15 to 30cm of new snow expected. Moderate to strong winds with temperatures at 1500m around -3.
Thursday
Stormy with around 15cm of new snow expected. Moderate southwest winds and temperatures at 1500m around -6.
More details can be found in the Mountain Weather Forecast.
