Avalanche Forecast
Issued: Feb 19th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
JMackenzie,
Avalanche Canada
Weather forecasts are inconsistent with how clear the skies will be for the next couple of days. During sunny periods avoid exposure to steep solar aspects and don't hang out below cornices.
Summary
Confidence
Weather Forecast
Thursday should be a mostly sunny day with temperatures reaching around -5 in the Alpine. Winds will steadily increase through the day, eventually reaching 75km/h from the West. Friday will also be windy.
Avalanche Summary
Isolated solar triggered sluffing up to size 1.0 on steep solar aspetcs.
Snowpack Summary
Expect to find moist snow on sheltered solar aspects, particularly at lower elevations. This will freeze into a thin crust by morning. Alpine areas are exhibiting widely variable wind slab conditions with everything from no wind effect to hard wind slabs to sastrugi. At Treeline and below soft snow and good skiing can be found in sheltered areas.
Terrain and Travel
- Be careful as you transition into wind affected terrain.
- Avoid shallow snowpack areas, rock outcroppings and steep convex terrain where triggering is most likely.
- Conditions may have improved, but be mindful that deep instabilities are still present.
- Cornices become weak with daytime heating or solar exposure.
- Avoid exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
Problems
Wind Slabs
Variable depth and density of wind slabs throughout the Alpine. These are most concerning in steep, convex and unsupported terrain.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Deep Persistent Slabs
This is a classic "low probability, high consequence" problem. While it is difficult to trigger, resulting avalanches will be very large. Use caution in shallow snowpack areas where triggering is more of a concern.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 20th, 2020 4:00PM
