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Avalanche Forecast

Archived

Mar 1st, 2022–Mar 4th, 2022

Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural and human triggered avalanches likely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
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.

Akamina Parkway CLOSED (Watch 511)

Warm temps and precip have created touchy avalanche conditions. Give the snowpack some time to adjust before traveling in steep terrain.

Consider overhead as many paths are running naturally to valley bottom.

Weather Forecast

Tonight: Continued precip and warm temps.  10cm of alpine snow with rain below 1800m

Wed: Cloudy with precip ending in the evening. Alpine temps around zero. Moderate SW winds. Freezing levels 1800m.

Thurs: Cloudy, flurries, light SW winds and alpine temps -3.  Freezing levels valley bottom.

Friday: Partially cloudy with alpine high -5. Winds mod SW.

Snowpack Summary

Over 60cm of storm snow in the alpine since Sunday with mod SW winds forming storm slabs up to 100cm. Rain soaked snow to at least 1800m. This overlies old windslab 10-30 cm deep. Feb 15 crust is 1 cm thick and exists to tree line all aspects and higher on solar aspects. Well settled midpack. Facets above Dec 4 crust, buried 150-200 cm.

Avalanche Summary

A widespread natural cycle today with storm slab, wet slab and wet loose avalanches to size 3. Numerous avalanches reaching valley bottom. Thanks for the great observations on the Mountain Information Network, we love seeing your adventures.

Confidence

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

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.

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.