Avalanche Forecast
Issued: Dec 4th, 2018 3:00PM
The alpine rating is Wind Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Low - Due to the number of field observations
Weather Forecast
The high amplitude ridge sitting off the BC Coast is expected to deflect any potential storm systems away from the province this week. The forecast period is marked by cooler temps, clear skies and no significant precipitation with no change expected for the foreseeable future.TUESDAY NIGHT: Freezing level at valley bottom, light southerly wind at most elevations, strong to extreme northwest wind at ridgetop, no significant precipitation expected. WEDNESDAY: Broken cloud cover, freezing level at valley bottom, light variable wind, no significant precipitation expected. THURSDAY: Clear sky, freezing level at valley bottom, light variable wind, no significant precipitation expected.FRIDAY: Clear sky, freezing level at valley bottom, light southwest wind at low elevations, moderate northwest wind at ridgetop, no significant precipitation expected.
Avalanche Summary
No new avalanche activity to report from Monday. On Sunday a human triggered avalanche was reported in Cornice Bowl. We received some updated information about the size of the avalanche. It's been determined that the northwest facing feature at 2300 m produced a size 2 avalanche that ran on the early November crust. The crown was 30 to 40 cm deep, approximately 20 m wide and 300 m in length. Check out the initial report here. Explosive control also triggered a few storm slabs up to size 2 from northeasterly aspects 1800-2000 m. If you're in the backcountry and have observations to share, please post to the Mountain Information Network.
Snowpack Summary
Up to 55 cm of recent snow sits on a combination of crust and surface hoar. The crust is most prevalent at and above treeline and is likely most problematic on north facing features, especially those that are large and planar in nature.The surface hoar is tricky to pin down because it is quite spotty in distribution, but it appears to be most prevalent on sheltered slopes at and above treeline. At the bottom of the snowpack lies another crust with weak sugary facets around it. There is a great MIN Report here that provides a good visual representation of the current snowpack.At treeline the average snowpack depth is 80 cm, with only thin coverage at lower elevation.
Problems
Wind Slabs
Aspects: North East, East, South East, South, South West.
Elevations: Alpine.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 5th, 2018 2:00PM