Avalanche Forecast
Avalanche Bulletin - Glacier National Park
The winter permit system remains in place and all permit areas are closed today.
Avalanche Problem 1: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Travel early before the heat of the day, minimize exposure to overhead avalanche terrain.
- If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.
Avalanche Problem 2: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Cornices are large and becoming weakened by daytime heating and solar input. Remember that even on a shaded aspect, the sun is still baking the back of the cornice.
Travel and Terrain Advice
- Minimize exposure to corniced features.
Avalanche Summary
Numerous natural avalanches to size 3.5 and artillery controlled avalanches to size 3 yesterday.
Snowpack Summary
We are into a melt freeze cycle. This morning we had a minimal recovery with temperatures just below zero at valley bottom and less of a recovery higher with an overnight inversion and temperatures of 6C at 1900m at 0700. There may be some dry snow on North aspects above 2400m. Cornices are large and will weaken with the rising temperatures.
Weather Forecast
The forecast calls for deteriorating weather throughout the day. A low pressure system from the pacific works into our region bringing cloudy skies and isolated showers this afternoon while freezing level reaches 3400m. Tonight and into Sunday, winter returns as freezing levels drop to 1800m and we receive 30 cm of snow.
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With little to no overnight refreeze the snowpack will destabilize quickly as temperature climbs today. Small releases or snowballs can gain mass to become large avalanches with today's conditions.