Avalanche Forecast

Issued: Mar 3rd, 2024 4:00PM

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

Avalanche Canada ahanna, Avalanche Canada

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⚠️Dangerous avalanche conditions⚠️

The snowpack is primed for human triggering. Careful snowpack evaluation, cautious route-finding, and conservative decision-making is essential.

Summary

Confidence

Moderate

Avalanche Summary

Natural, skier, and remotely triggered avalanches up to size 3.5 have been reported throughout the region daily over the past week. Many of these avalanches failed on layers below the recent storm snow, the mid-February weak layer, and the early-February facet/crust layer.

While natural activity has begun to taper off, human triggering is expected to remain a serious concern.

Snowpack Summary

Up to 70 cm of recent snow has accumulated over the last week. The new snow has formed touchy slabs, especially in wind-exposed terrain and may sit over a variety of weak interfaces.

A weak layer of facets, surface hoar, and/or a crust from mid-February may be found down 40 to 80 cm.

A widespread crust formed in early February is buried by roughly 60 to 120 cm and extends up to 2400 m. Weak facets have been found above this crust. This layer continues to produce concerning avalanches across the province.

The lower snowpack is generally well-settled and strong.

Weather Summary

Sunday night

Mostly cloudy with around 5 cm of snow,. 20 to 30 km/h south ridgetop wind. Treeline temperature -9 °C.

Monday

Mostly cloudy with 5 to 10 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Tuesday

Up to 5 cm of snow overnight then a mix of sun and cloud. 10 to 20 km/h northwest ridgetop wind. Treeline temperature -8 °C.

Wednesday

Sunny. 10 km/h northwest ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep in mind that human triggering potential persists as natural avalanching tapers off.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Remote triggering is a concern, watch out for adjacent and overhead slopes.
  • Use conservative route selection. Choose simple, low-angle, well-supported terrain with no overhead hazard.

Problems

Storm Slabs

An icon showing Storm Slabs

Recent snow accompanied by strong wind has formed touchy slabs that may sit over various weak layers. These slabs remain reactive to human triggering and have the potential to travel full path.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1.5 - 3

Persistent Slabs

An icon showing Persistent Slabs

Buried weak layers remain sensitive to human triggering and could result in very large avalanches. It is possible to trigger these layers remotely and avalanches have the potential to run full path, so watch your overhead exposure.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

2 - 3.5

Valid until: Mar 4th, 2024 4:00PM

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