Avalanche Forecast

Issued: Mar 1st, 2022 4:00PM

The alpine rating is considerable, the treeline rating is considerable, and the below treeline rating is moderate. Known problems include Wind Slabs and Storm Slabs.

Avalanche Canada JMinifie, Avalanche Canada

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Modest amounts of new snow and wind continue to build slabs on potentially weak layers. Evaluate each piece of terrain closely until the new snow has had an opportunity to bond to the layers below. Pay attention to overhead exposure at low elevations where the snowpack is moist. 

Summary

Confidence

Moderate - Forecast snowfall amounts are uncertain.

Weather Forecast

More snow over the next 24hrs and then a ridge of high pressure will build into the weekend.

Tuesday Night: Cloudy. 10cm of new snow. Wind light from the southeast. Temperature -2°C

Wednesday: Cloudy. 10-15cm of new snow with rain in the valleys. Wind light gusting moderate from the south. A high of 0°C and a low of -2°C. Freezing levels will hover around 1000m. 

Thursday: A mix of sun and clouds. No new precipitation. Winds light from the south in the morning shifting to north in the afternoon. Alpine high of 0°C and a low of -2°C. Freezing levels around 1000m

Friday: A mix of sun and cloud. No new precipitation. Winds light from the north. Alpine high of 0°C. 

Avalanche Summary

Isolated skier cut wind slab and storm slab avalanches to size 1 were reported by guiding operations and recreationists on Monday

Snowpack Summary

In the alpine and upper tree line, new snow over the last 24hrs has settled into storm slab up to 30cm thick and wind slab up to 80cm thick in leeward features. In some places, this sits above weak, feathery surface hoar crystals buried on February 26th. There is now 20-100cm of snow sitting on top of the mid-February crust that was buried on February 11th. This thick crust has effectively capped and bridged the lower snowpack. The upper snowpack is moist below 1000m. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be careful to keep storm day fever from luring you out into bigger terrain features.
  • Avoid freshly wind loaded terrain features.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Watch for fresh storm slabs building throughout the day.
  • Watch for changing conditions today, storm slabs may become increasingly reactive.

Problems

Wind Slabs

An icon showing Wind Slabs

Aspects: North, North East, East, North West.

Elevations: Alpine, Treeline.

Likelihood

Likely

Expected Size

1 - 2

Storm Slabs

An icon showing Storm Slabs

Up to 30cm of new snow has settled into a cohesive slab which overlies a variety of surfaces. Reactivity could vary depending on elevation and aspect. Pay attention to overhead exposure in larger avalanche terrain as likelyhood of natural avalanches will rise with continued snowfall. 

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2

Valid until: Mar 2nd, 2022 4:00PM

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