Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Although the storm is over, large natural avalanches are still running as of this morning. Expect natural avalanche activity to continue as the sun makes its debut.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Several deeply buried persistent weak layers are primed for natural and skier triggering with the new storm load. These slides have the potential to reach the full extent of their run-out zones. Mature timber may not be a default safe spot today.
Travel and Terrain Advice
- If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
Avalanche Summary
Numerous natural and artillery controlled avalanches up to size 4.0 during the avalanche cycle that accompanied yesterday's storm. Several ran full extent, taking out mature trees. A large natural avalanche, size 3.5, was observed running to the valley bottom this morning in the HWY corridor. Natural activity has not yet subsided.
Snowpack Summary
Approximately 60cm of new snow in the past 36hrs is settling into a widespread storm slab. Storm slabs will be deeper and more reactive in wind affected areas. Dec and Jan persistent weak layers are now buried 150-200cm in the snowpack. Height of snow is 350cm at 1900m.
Weather Forecast
The storm is over. Expect mostly sun today with cloudy periods. Alpine temperatures around -13.0, light ridge winds and freezing levels remaining at valley bottom. High pressure with nil precipitation continues through the weekend. Weather models show a pulse of moderate precipitation arriving Tuesday night, bringing up to 20cm of snow.
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The last storm brought over 60cm of new snow in 48hrs. Storm slabs remain touchy and are still resulting in large natural avalanches, as recently as 0700 this morning. Expect the "first kiss of the sun" to trigger more storm slab avalanches.