Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Recent storm snow has settled into a touchy soft slab. This will be most reactive at ridgetop or in steep unsupported terrain.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
- Evaluate unsupported slopes critically.
Avalanche Summary
Reports came in late yesterday of a natural avalanche cycle triggered by new snow and wind loading. The avalanche path 'Frequent Flyer' ran during the day on Dec 1, pushing through alders and burying the skintrack 7-10m wide. A good report here. Avalanche activity is expected to continue today.
Snowpack Summary
25cm of new snow from the last 24 hrs sits on the previous storm snow. The November 26th crust layer is easily identified down 65cm. It separates the moist and warm lower snowpack from the cold and dry upper snowpack. Recent stability tests show a generally good bond between the Nov 26 and the dry snow above.
Weather Forecast
A slow moving low pressure system offshore is tracking Southeast today, bringing potential for convective flurries and a mix of sun and cloud. We could receive another 5 or more cm's today with freezing level at 1000m and light SW winds gusting to 40kph. High pressure is expected to build on Sunday, leaving dry conditions for the rest of the week.
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The steady accumulation of new snow is settling into a reactive storm slab. It will be most reactive at ridgetop and in steep unsupported terrain. Expect avalanches to be run fast and to the bottom of run-outs. Be aware of overhead exposure!