Avalanche Forecast

Issued: Apr 18th, 2022 4:00PM

The alpine rating is high, the treeline rating is high, and the below treeline rating is high. Known problems include Storm Slabs and Loose Wet.

Avalanche Canada JSmith, Avalanche Canada

Large storm slabs are expected to be very reactive to human triggers at all elevations on Tuesday. 

Travel in avalanche terrain is NOT recommended.

Summary

Confidence

High -

Weather Forecast

Monday night: Snow; 25-30 cm / Strong southwest wind / Low of 0 / Freezing level 800 m.

Tuesday: Mix of sun and cloud / Light southwest wind / High of 6 / Freezing level 1200 m.

Wednesday: Sunny, with increasing cloudiness in afternoon. / Strong southeast wind / High of 10 / Freezing level 1600 m.

Thursday: Cloudy with flurries; 5-10 cm / Light southwest wind / High of 6 / Freezing level 1300 m.

Avalanche Summary

Large natural and human triggered avalanche activity is expected on Tuesday. Travel in avalanche terrain is NOT recommended. 

Snowpack Summary

Forecast 25-30 cm of new snow Monday night could bring storm totals to 45-55 cm by Tuesday morning. The new snow and strong southwest winds are expected to form large storm slabs that will be very reactive to human triggers at all elevations. Expect the storm slabs to be most reactive on lee features at treeline and above.

The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow. Below this, there are several crusts in the upper snowpack, but they are unlikely to be a concern in most areas until the next significant warming event.

Terrain and Travel

  • The new snow may require another day to settle and stabilize.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Avoid traveling in runout zones. Avalanches have the potential to run to the valley floor.

Problems

Storm Slabs

An icon showing Storm Slabs

Large storm slabs are expected to be very reactive to human triggers at all elevations on Tuesday. 

Travel in avalanche terrain is NOT recommended.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely - Very Likely

Expected Size

1.5 - 2.5

Loose Wet

An icon showing Loose Wet

Expect a wet loose natural avalanche cycle to occur when the sun comes out.

Stay well away from any large slopes or avalanche paths that are in the sunshine.

Aspects: East, South East, South, South West, West.

Elevations: All elevations.

Likelihood

Very Likely - Almost Certain

Expected Size

1 - 2

Valid until: Apr 19th, 2022 4:00PM