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Avalanche Forecast

Archived

Dec 2nd, 2021–Dec 3rd, 2021

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

Regions

Waterton Lakes.

Break out your hiking boots or trail runners. Recent rain events have reduced the snowpack to dirt in most areas below 1800m. Waterfall ice has also been reset on all low elevation climbs.

Weather Forecast

Over the next couple of days we will see a cooling trend with temps staying below zero at valley bottom. No significant precipitation is expected until saturday, when a weak frontal system will bring flurries to the area. Winds will continue to decrease until saturday with ridge top values around 40km/h

Snowpack Summary

10cm new snow with strong to extreme SW winds forming thin windslabs in ALP. This overlies an estimated 30-100cm snowpack in the ALP. This weeks X-winds have formed a variable snowpack, stripped to ground in many locations and deeper in isolated lees. At least one Nov melt freeze crust exists above 2000m. Snowpack is not at threshold below 2000m

Avalanche Summary

No new avalanches observed on road patrol today. Observations in the area are very limited, if you go out into the mountains please share your observations on the Mountain Information Network.

Confidence

Due to the number and quality of field observations

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.