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Avalanche Forecast

Archived

Apr 4th, 2022–Apr 7th, 2022

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

Regions

Waterton Lakes.

A winter interlude in the middle of spring has us thinking about winter problems again. Watch for windslabs in alpine and treeline lees.

Be prepared to travel in spring conditions again later this week.

Weather Forecast

Tonight: Flurries amounting 10-15 cm. Strong SW winds.

Tuesday: Cloudy with flurries. Alpine high -5 with moderate to strong SW winds. Freezing level 1600m.

Wednesday: Clearing. Alpine high 0 with light to moderate SW winds. FL 1600m.

Thursday: Mainly sunny. Alpine high of +3. Moderate SW winds. FL 3000m.

Snowpack Summary

Up to 15 cm of new snow with strong SW winds has forming 15-30 cm windslabs on refrozen surfaces. Refrozen surfaces exists on all aspects well into into ALP. A series of crusts and windslab make up the midpack. Lower snowpack is well settled 1F to P. HS 250-300 cm near the continental divide.

Avalanche Summary

No new avalanches observed with slightly cooler temps this week. 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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.