Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Stick to your standard safe backcountry travel techniques. Human triggered avalanches are possible. Avoid cornices and continually update your hazard assessment.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use caution on open slopes and convex rolls
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
A suncrust is buried 40-70 cms on solar aspects. This layer has the potential for human triggering, dig down and assess the snowpack before committing to your line.
Travel and Terrain Advice
- Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.
- Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
Avalanche Summary
Crossover avalanche path had a natural size 3.5 yesterday afternoon! This cornice trigger was an outlier compared to the rest of the avalanche's size and destructive potential, that we observed yesterday. No new avalanches reported from the backcountry, but nearly a dozen relatively small avalanches occurred on extreme terrain in the HWY corridor.
Snowpack Summary
~25 cm new snow fell over the past few days burying wind slabs or sun crusts aspect dependent. The late Feb crust/facet combo is down 30-50cm on solar aspects and has potential to be a good bed surface. The January PWL's are buried 150-200cm
Weather Forecast
Today we could see sun, cloud and isolated convective flurries. Temperatures will remain cool with an alpine high of -10 and light winds. The sun could pack some punch today if it breaks through the cloud, this will be the main weather factor influencing the snowpack structure. Snow starting Thursday and we could see up to 20cm by Friday.
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Storm snow has formed a slab at ridgetop, wind exposed terrain or in steep unsupported rolls. Sunny breaks are forecast today, even short bursts of the strong spring sun could make the new storm snow more reactive.