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Avalanche Forecast

Archived

Apr 1st, 2021–Apr 4th, 2021

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, 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, human triggered possible.

Regions

Waterton Lakes.

Start and finish your outing early as warm temperatures and solar radiation will increase the hazard throughout the day. 

Weather Forecast

Friday: Sunny with moderate SW gusting 85km/h. Freezing level 2100m.

Saturday: Sunny with cloudy periods. Moderate SW wind gusting 70km/h. Freezing level 2100m.

Sunday: Scattered showers with snow above 1900m. 8-15mm.

Snowpack Summary

Moist surface snow on solar aspects will create a crust that deteriorates through the day. Previous SW wind formed wind slabs up to 30cm deep in the alpine & exposed slopes at tree line. These wind slabs sit over a variety of old surfaces including a thick crust that exists to ridgetop except on high N aspects. Mid snowpack is well consolidated.

Avalanche Summary

Size one loose wet avalanches observed on solar aspects. Please consider submitting a MIN report if you see an avalanches.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Problems

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.

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.