Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Challenging travel conditions remain in the wake of last week's rainstorm.
Avalanche Problem 1: Wet Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid steep, open slopes.
- Use extra caution on slopes if the snow is moist or wet.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Extreme southerly winds accompanied the November 22nd storm and created reactive wind slabs. This problem is isolated to leeward pockets in the alpine due to intense rainfall and warmer temps at lower elevations during the storm.
Travel and Terrain Advice
- Use caution in lee areas. Recent wind loading has created wind slabs.
Avalanche Summary
Natural avalanche activity has dropped off since the recent rain storm.
Snowpack Summary
20cm of dry snow is beginning to bond to a breakable crust. Below the November 23 crust sits a weak rain-saturated snowpack. If you take your skis off, you'll likely be standing in a hole up to your waste. Strong winds during the last storm created isolated pockets of wind slab in the alpine on northerly features. October 31 crust is down 100cm.
Weather Forecast
Cloudy skies with isolated flurries and trace amounts of accumulation. Freezing level at 1300m and ridge winds SW 25-45Km/h. A moisture laden system will track inland Sunday bringing strong SW winds and 60mm of precipitation to Rogers Pass by Tuesday afternoon. Freezing levels are expected to rise to 1900m, meaning 60mm of rain below tree line.
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Dry surface snow is insulating a rain-saturated wet slab that extends almost to the ground. This is a snowpack weakness that will only heal with cold. Given the mild weather forecast, this layer is expected to persists for several days.