Avalanche Forecast
Issued: Dec 21st, 2019 4:11PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs, Loose Dry and Deep Persistent Slabs.
Benjamin Firth,
Parks Canada
Avoid avalanche terrain at all elevations. Hwy 93N and Maligne Road will remain closed Sunday and potentially into Monday due to avalanche control
Summary
Weather Forecast
Precipitation will trail off over Saturday night and temperatures will cool. Expect a clearing trend into Sunday and Monday with very light winds from the West.
Snowpack Summary
Up to 100cm new snow in the last 48 hours with very little wind effect. This overlies wind slab and a variety of weak layers near the ground.
Avalanche Summary
Widespread avalanche activity on all aspects and elevations up to size 3.0. Many dry loose avalanches below treeline and above, numerous storm slab avalanches below treeline and above. Several avalanches stepped down to weaknesses near the ground. Much of the alpine was obscured today but it is expected that many avalanches occurred on all aspects
Confidence
Due to the number of field observations on Sunday
Problems
Storm Slabs
Up to 100cms of new snow has fallen in the last 48 hours. Expect many soft slab avalanches on all aspects and elevations up to size 3 Sunday
- If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
- Avoid all avalanche terrain during periods of heavy loading from wind and new snow.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Loose Dry
A significant amount of snow has accumulated on steep features
- If triggered dry loose point releases can form deeper deposits in terrain traps.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
Dry loose and storm slab avalanches may step down to weak layers close to the ground producing large avalanches
- If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Dec 22nd, 2019 4:00PM
