Avalanche Forecast
Avalanche Bulletin - Glacier National Park
The atmospheric river of warm moisture is upon us. Look for an avalanche danger increasing to HIGH later today.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use conservative route selection, choose moderate angled and supported terrain with low consequence.
- If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Warm temperatures and continued loading should be enough to awaken the Oct 31st crust over the next 48hrs. The question is timing which may be later today or into Thursday morning.
Travel and Terrain Advice
- Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
- Use conservative route selection, choose moderate angled and supported terrain with low consequence.
Avalanche Summary
One new size 2 avalanche recorded yesterday in the highway corridor. Expecting an avalanche cycle to start on Wednesday and continue into the afternoon on Thursday.
Snowpack Summary
Warm temps and a mix of rain and snow are destabilizing surface layers in the snowpack. Last weekend's storm snow will be settling rapidly. Mod shears in the storm snow down 40cm and 60cm at 2000m yesterday. The Oct 31st crust down 100cm should awaken in the next 48hrs.
Weather Forecast
Wet flurries Mod SW wind gusting to strong, and freezing level bumping up to 2900m later today. Temperatures are already above freezing at Round Hill station at 2100m. The forecast atmospheric river is upon us and will bring high freezing levels, moderate to strong SW winds and heavy precipitation into Thursday afternoon.
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Last weekend's storm slab will be settling quickly. Weak layers down 40cm and 60cm and Nov 9th interface should awaken with rapid warming, increased precipitation and strong SW winds forecast today.