Avalanche Forecast

Issued: Feb 20th, 2022 3:00PM

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

Avalanche Canada ghelgeson, Avalanche Canada

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The storm produced up to 25 cm of new snow and temperatures are staying cool. Storm slabs may remain sensitive to human triggering, especially in wind exposed terrain.

Summary

Confidence

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Weather Forecast

SUNDAY NIGHT: Freezing level around 500 m, no new snow expected, light northeast wind at most elevations with moderate gusts at ridge top.

MONDAY: Broken cloud cover in the morning giving way to clear skies in the afternoon, no new snow expected, light northeast wind, daytime high temperature at 1200 m around 0 C.

TUESDAY: Broken cloud cover in the morning giving way to clear skies in the afternoon, no new snow expected, light to moderate east/northeast wind, daytime high temperature at 1200 m around -2 C.

WEDNESDAY: Scattered cloud cover, no new snow expected, light to moderate northwest wind, daytime high temperature at 1200 m around -2 C.

Avalanche Summary

Wind and storm slabs likely formed Saturday night into Sunday.

A few small loose dry avalanches were reported Saturday before the bulk of the snow fell.

Snowpack Summary

The weekend storm produced up to 25 cm of new snow and most of that fell with very little wind.

The mid February crust is down 20 to 40cm and exists on all aspects and elevations.

The late-January melt-freeze crust is now down around 70 cm and is reported to be knife hard and up to 30 cm thick. This crust extends to at least the top of treeline and is generally well bonded to the adjacent snow. 

The middle and lower snowpack are considered well settled and strong.

Terrain and Travel

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Closely monitor how the new snow is bonding to the crust.

Problems

Storm Slabs

An icon showing Storm Slabs

The storm produced up to 25 cm of snow Saturday into Sunday, and while the storm slabs are expected to settle and bond rather quickly in the cooling temperatures, you still need to be on guard, especially in wind exposed terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Feb 21st, 2022 3:00PM

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