Avalanche Forecast

Issued: Feb 23rd, 2024 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs and Deep Persistent Slabs.

Avalanche Canada isnowsell, Avalanche Canada

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Carefully assess steep, rocky, and wind-affected slopes where triggering a slab avalanche is most likely.

Summary

Confidence

High

Avalanche Summary

Several naturally, skier, or explosive-triggered storm and wind slab avalanches have been reported over the last couple of days. Avalanches occurred in treeline and alpine terrain on a variety of aspects up to size 2.

A couple of cornice failures have been reported during periods of strong sun.

Snowpack Summary

Approximately 5 to 15 cm of recent snow has buried a variety of old surfaces. Including old wind-affected surfaces in exposed terrain, surface hoar or faceted snow in sheltered terrain, and sun crusts on south-facing slopes.

A widespread crust formed in early February is buried by roughly 20 to 50 cm of snow. This crust may be less prominent or not exist at high alpine elevations.

The mid and lower snowpack is largely faceted with depth hoar and a crust found at the bottom of the snowpack in many areas.

Weather Summary

Friday Night

Mostly cloudy with 0 to 3 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.

Saturday

Mostly cloudy with 0 to 5 cm of snow. 20 to 40 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.

Sunday

Mostly cloudy with 0 to 5 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.

Monday

Mix of sun and cloud with 0 to 2 cm of snow. 10 to 20 km/h west ridgetop wind. Treeline temperature -12 °C. Freezing level at valley bottoms.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Wind slabs may be poorly bonded to the underlying crust.
  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Problems

Wind Slabs

An icon showing Wind Slabs

Recent snowfall has been redistributed by generally southwest winds at higher elevations. Freshly formed slabs may sit atop various weak layers.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

A weak layer near the base of the snowpack remains a concern, mainly at higher elevations in the alpine and in steep, rocky, open features at treeline.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely

Expected Size

2 - 3.5

Valid until: Feb 24th, 2024 4:00PM