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Avalanche Forecast

Mar 24th, 2022–Mar 25th, 2022
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Weather Forecast

Ridge of high pressure breaks down on Friday with another approaching weather system for the weekend.

Fri: Cloud and sun, Alp Temp: -3, Wind: SW 15-30, Fz lvl: 1800 m

Sat: Flurries, 4 cm, Alp Temp -2, Wind: SW 15, gust to 40, Fz lvl: 1900 m

Sun Flurries, Alp Temp high +1, Wind Light to 20, Fz lvl: 2000 m

Snowpack Summary

10-15 cm new snow overnight Wednesday with moderate winds covers a variety of spring surfaces. These include rain crust up to 2200m and solar crust into the alpine, and remnant wind slabs on alpine polar aspects buried on March 23. The March 11th crust is buried 40-70cm to 2000m and higher on solar asp.

Avalanche Summary

Loose wet natural activity was observed along the highway corridor over Wednesday night and into Thursday. 

Observations of natural activity in the backcountry Thursday included wind slabs and wet slabs, MIN.

On Tuesday there were several loose wet avalanches observed in the HWY corridor, to size of 1.5. 

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

Approximately 10-20cm of new snow fell overnight on Wednesday, coupled with moderate south-westerly wind, and warm temperatures. Expect new wind slabs on exposed terrain features in the Alpine.

  • Use caution in lee and cross-loaded terrain near ridge crests.
  • Avoid freshly wind loaded features.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2.5

Loose Wet

High freezing levels and strong solar inputs over the last two days have weakened the snowpack below treeline.

  • Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.
  • Use extra caution on slopes if the snow is moist or wet.

Aspects: South, South West, West.

Elevations: Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2.5

Persistent Slabs

While avalanche activity on this layer is tapering off in Rogers Pass, human-triggered avalanches are still possible, especially on steep solar aspects. Our neighbors West of Rogers Pass continue to witness activity on this layer.

  • Convex features and steep unsupported slopes on solar aspects will be most prone to triggering.
  • Evaluate terrain features by digging and testing on adjacent, safe slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2.5