Avalanche Forecast
Avalanche Bulletin - Glacier National Park
Avalanche activity will increase over the day as an intense warm and moist storm arrives midday. Little to no overnight refreeze will allow the warm temps and rain to rapidly destabilize the snowpack tree line and below.
Avalanche Problem 1: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use extra caution on slopes if the snow is moist or wet.
- Be wary of slopes that did not previously avalanche.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
70-90cm of settled snow sits on the mid March crust/facet combo and fails suddenly in the mod-hard range in stability tests on solar aspects. This layer might become more active with the incoming snow/rain and rising temperatures.
Travel and Terrain Advice
- Use extra caution on slopes if the snow is moist or wet.
- Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
Avalanche Summary
Numerous sz 2-3 avalanches yesterday and over 40 sz 2-3 avalanches on Sunday occurring in the moist storm snow.
Avalanche activity is expected to increase again today as a warm and moist weather system will arrive early this afternoon.
Artillery avalanche control is planned for this afternoon. Check DriveBC for the latest updates.
Snowpack Summary
The top 20cm of snow was moist up to 2100m yesterday and up to 3000m the day before on all aspects. Minimal overnight recovery below tree line as freezing levels remained around 0 degrees. Well-settled mid and lower snowpack with the Mar 15 crust complex down 70-90cm on solar aspects.
Weather Forecast
Cloudy today with snow and rain arriving midday as an intense, warm and moist pacific low pushes inland. The alpine will reach above zero temperatures as the freezing level rises to 2500m. Winds during the frontal passage of the storm will be 30km/hr from the south gusting to 50km/hr. Wednesday will see clearing skies, a drop in temp and wind.
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Expect the moist surface snow to destabilize rapidly as the temperature rises and snow/rain fall amounts increase.