Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Moderate avalanche hazard means human-triggered avalanches are possible. Winds slabs and a buried sun crust require thoughtful decision making.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid convexities and unsupported features.
- Use caution in lee areas. Recent wind loading has created wind slabs.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
A suncrust and facet layer is buried down 40-70 cms on solar aspects. This layer has the potential to be human triggered with wide propagation.
Travel and Terrain Advice
- Make observations and assess conditions continually as you travel.
Avalanche Summary
Yesterday's strong solar input & rising freezing level triggered a natural avalanche cycle to size 2.5 mostly from steep solar slopes. The avalanches were loose & moist reaching into the middle of the run outs.
Snowpack Summary
We have 10cm of new snow which covers windslabs on all aspects above tree line. A crust/facet combo is down 30-50cm on solar aspects and has potential to be a good bed surface for avalanches. Rising freezing level & strong sun yesterday turned the surface snow moist on solar aspects and everywhere below 1400m. The January PWL's are buried 150-200cm
Weather Forecast
Today will be mostly cloudy with scattered flurries amounting to 5 cm. Convective flurries are possible which could significantly boost snowfall amounts. Ridgetop wind will be westerly 10-20kph and freezing level is forecast to 900m. That should be it for precip for the early part of the week atleast with mostly trace amounts forecast.
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Around 10 cm of new snow fell overnight with another 5-10 possible today. Expect this snow to be reactive at ridgetop or in steep unsupported terrain. This new slab buries an old windslab that was reactive on solar aspects.