Avalanche Forecast
Issued: Feb 3rd, 2021 8:24AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Loose Dry.
ross campbell,
Conservative terrain choices is required today. Be wary of steep, unsupported terrain features, and large overhead hazards.
Summary
Weather Forecast
A mixed bag of weather can be expected today as a Ridge of High Pressure is trying to move over Rogers Pass, while a Low-Pressure system retreats south of the border. It's currently snowing, but the sun is forecasted to come out today, freezing levels will reach 900m, and winds could reach mod values from the SW. More flurries tonight and tomorrow.
Snowpack Summary
Another 15cm last night, brings our storm total to ~80cm at TL, with the bulk of the precip falling on Monday and Tuesday. The brunt of the storm brought warm temperatures, and strong winds creating touchy storm slabs. The new snow buries a previous drought layer (surface facets, surface hoar, wind affect, and sun crust).
Avalanche Summary
Avalanche Control on Tuesday morning produced numerous avalanches; averaging size 3, several size 3.5s, and a few size 4s! Large natural avalanches were also observed in the HWY corridor to size 3.5. Limited obs from the backcountry; however, its likely there were numerous natural avalanches, Monday evening and Tuesday morning.
Confidence
Problems
Storm Slabs
Approximately 60cm of recent storm snow, accompanied by warm temps, and strong winds built fresh storm slabs. The recent snow buries a previous drought layer(surface hoar, sun crust, and surface facets), which varies on elevation and aspect.
- Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Loose Dry
Expect loose dry avalanches in steep terrain. The underlying facets will allow for a greater snow mass to accumulate and flow fast and far.
- If triggered dry loose point releases can form deeper deposits in terrain traps.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Feb 4th, 2021 8:00AM
