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Avalanche Forecast

Archived

Dec 8th, 2019–Dec 11th, 2019

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Waterton Lakes.

Saturday nights storm brought 15-25cm of snow to the park, and triggering storm slabs becomes more likely the higher you go. Take the time to evaluate the density and bond of the new snow before committing to a piece of terrain.

Weather Forecast

Monday: Cloudy with isolated flurries with an alpine high of -11. Moderate west winds.

Tuesday: Cloudy with isolated flurries with an alpine high of -6. Moderate west to northwest winds and strong winds overnight

Wednesday: Cloudy with isolated flurries with an alpine high of -6. Moderate west winds.

Snowpack Summary

15-25cm low density storm snow coupled with moderate west winds has formed new slabs in the alpine and treeline. This overlies previous windslabs and a crust below 2200m. A melt freeze crust complex formed throughout October and November forms the base of the snowpack, and this will be a layer to keep an eye on as the season continues.

Avalanche Summary

Saturday night's snowfall brought enough snow and wind to trigger a limited avalanche cycle in lee alpine terrain along the Akamina Parkway. No new avalanches observed in the less snowy front ranges. Neighbouring operations have reported large avalanches running on the October and November melt freeze crusts with large explosive triggers.

Confidence

Due to the number of field observations

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.