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Archived

Avalanche Forecast

Nov 29th, 2022–Nov 30th, 2022
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Continued snowfall accumulation is bringing with it a high hazard in the alpine.

Be aware of avalanche runouts even at elevations with little snow.

Confidence

High

Avalanche Summary

Observations are limited at this time of year. No new avalanches have been reported or observed. If you do head into the backcountry consider submitting a MIN report!

Snowpack Summary

Snow in the last 24 hours dusted the entire island and brought up to 20 cm at high elevations in some places while most of our area received around 8 to 12 cm. In open alpine areas, this new snow is sitting on wind slabs. At higher elevations, the snowpack is at approximately 80 cm. More snow coming today will continue to cover surface roughness but below treeline is expected to remain below the threshold for avalanches for now.

Weather Summary

Tuesday Night

Cloud, 20 - 25 cm accumulation, southerly wind 40 km/h gusting to 65 km/h, -5 C at 1500 m.

Wednesday

Cloudy, 15 to 20 cm accumulation, southwest 20 km/h gusting to 55, alpine temperatures -6 to -10 C at 1500 m.

Thursday

A mix of sun and cloud, trace accumulation, winds south 25 km/h gusting to 50, -5 to -10 C at 1500m with freezing level to sea level.

Friday

Cloudy with sunny periods, 2 to 10 cm accumulation, winds southwest 30 km/h, temperatures -5 to -8 C at 1500 m with freezing levels around 500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Travel in alpine terrain is not recommended.

Avalanche Problems

Storm Slabs

Tuesday night's storm will bring with it substantial accumulations at all elevations. Rapid and intense loading will produce naturally triggered avalanches. Wind slabs may form later in the day as snowfall dissipates.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1 - 2