Avalanche Forecast
Avalanche Bulletin - Glacier National Park
The storm slab will be most reactive at ridgetop where exposed to wind.
Avoid exposure to other groups above or below you.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Evaluate unsupported slopes critically.
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
Avalanche Summary
The storm from Friday and Saturday brought heavy snowfall and strong winds at ridgetop. This triggered a natural avalanche cycle to size 3 with some paths running to valley bottom. Friday the avalanche path 'Frequent Flyer' ran during the day, burying the skintrack 7-10m wide. A good report here.
Snowpack Summary
25cm of recent snow sits on the previous settled storm snow. The November 26/23rd crust layers are easily identified down 65-80cm. Recent stability tests show a generally good bond between the Nov 26 and the dry snow above. The lower snowpack is still moist but is starting to dry out with cooler temperatures.
Weather Forecast
A ridge of high pressure will build today over Roger's Pass. Expect cloudy skies with some sunny breaks throughout the day today. No new snow is forecast and the alpine high will be -10 with the freezing level staying at valley bottom. Winds will be generally light from the Northwest. The high pressure will dominate the weather through the week
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Settling new snow and wind at ridgetop has created a reactive soft slab. Compression tests yesterday showed shears in the storm snow down 15 & 30cm. In steep alpine terrain avalanches may run to the bottom of run-outs. Be aware of overhead exposure!