Avalanche Forecast
Issued: Feb 11th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
JH,
Avalanche Canada
Fresh storm slabs will require some time to settle and stabilize, use extra caution as you transition into wind effected terrain.
Summary
Confidence
Avalanche Summary
There were a few large natural avalanches (up to size 3.0) from steep terrain in the highway corridor Friday through Saturday morning.
Snowpack Summary
Up to 60cm of storm snow has fallen in the past week, accompanied by periods of strong SW winds. This has left several potential failure planes in the upper snowpack, especially in wind exposed areas.
The mid-snowpack is generally well bonded, rounded grains.
The basal Nov 17 deep persistent weak layer has not produced any slab avalanches in GNP for several weeks now, but persists in many places as faceted crystals - these are accompanied by a decomposing crust in some locations.
Weather Summary
Another frontal system arrives Sunday night into Monday.
Tonight: Mainly cloudy with isolated flurries, Alpine low -9°C. Light SW ridgetop winds.
Sunday: Flurries turning to snowfall in the afternoon (10-15cm). Alpine High -5°C. Moderate-strong SW wind.
Monday: Snow (10-15cm). Low -10°C, High -7°C. Strong SW wind.
Tuesday: Mix of sun and cloud. Low -16°C, High -11°C. Light northerly winds.
Terrain and Travel Advice
- Continue to make conservative terrain choices while the storm snow settles and stabilizes.
- Avoid freshly wind loaded terrain features.
Problems
Storm Slabs
The storm slabs from Friday are settling and strengthening, but incoming snow and wind on Sunday afternoon could rebuild this problem quickly.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Feb 12th, 2023 4:00PM
