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Avalanche Forecast

Archived

Mar 19th, 2022–Mar 22nd, 2022

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

Regions

Waterton Lakes.

Below 2000 m a melt freeze crust of varying thickness will make ski quality variable.

At alpine and treeline windslabs remain possible to human triggering in steep unsupported terrain.

Weather Forecast

Sunday: Cloudy with sunny periods isolated flurries, amounting to 5 cm. Moderate gusting strong W winds. Alpine high -8. Freezing levels valley bottom.

Monday: Cloudy with isolated flurries, trace precip. Moderate W winds. Alpine high -6, low -10. FL 1400m.

Tuesday: Cloudy with sunny periods. Moderate SW winds. Alpine high -2, low -5. FL 1700m

Snowpack Summary

Wind slabs 20-60cm deep at alpine and treeline. Below 2000m is a melt freeze crust of varying thickness. This overlies old windslabs and the March 3 rain crust. Feb 15 crust down 70-120 cm exists up to 2000m. Lower snowpack is well settled 1F to P. HS 250-300 cm near the continental divide.

Avalanche Summary

Numerous natural loose wet avalanches to sz 1.5 were observed Sat from steep terrain and rocks at peak solar. Several natural windslab avalanches, sz 1 -2, were observed in alpine lees. Observed from a far a crown above Forum Lake, suspect wind slab avalanche sz 3 from last 24 hrs. Please report any observations to the Mountain Information Network

Confidence

Due to the number 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.