Avalanche Forecast
Issued: Nov 18th, 2020 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs and Storm Slabs.
Ross Campbell,
The saying "Patience is a virtue" captures the mindset we should try and employ. As temperatures cool, riding conditions will improve, and our Avalanche hazard will decrease.
Summary
Weather Forecast
It's still unseasonably warm out, but we should start to see a cooling trend over the next few days.
Today: A mixed bag with sunny periods and flurries, FL falling to 1500m, winds abating to moderate values from the South.
Tonight: 8cm, FL lowering to valley bottom.
Thursday: Flurries
Friday: 15cm of new snow.
Snowpack Summary
Continued warm wet conditions at Rogers Pass, with 10 more mm of rain down low and 10-15cm of new snow up high, accompanied by strong Southerly winds. The Nov 5th Crust complex is now buried 40-70cm depending on elevation, and has been most reactive so far at Treeline. Nov 5th crust exists on all aspects up to 2500m, and higher on steep solar asp.
Avalanche Summary
No new avalanches were observed yesterday in the Highway Corridor, or reported from the backcountry. Last weekend we had a skier accidental with a full burial up Connaught Creek, where the storm slab was initiated on the Nov 5th crust. If you observe an avalanche or notable conditions, consider sharing on the AvCan MIN site.
Confidence
Problems
Persistent Slabs
In the Alpine continued snowfall, moderate temps, and strong wind has increased slab properties above the Nov 5th crust. While at Treeline rain continues to influence the upper snowpack, making for possible moist "spring like" avalanche conditions.
- 1011
- New storm slabs may step down to deeper layers resulting in large avalanches.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Storm Slabs
Recent new snow, warm temperatures, high humidity and strong wind has created storm slabs in the Alpine.
- If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
- Convex features and steep unsupported slopes will be most prone to triggering.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Nov 19th, 2020 8:00AM
