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Archived

Avalanche Forecast

Dec 7th, 2022–Dec 8th, 2022
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
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

Regions: North Shore, Sasquatch, Sky Pilot, South Coast, Stave, Tetrahedron.

The incoming storm will create dangerous avalanche conditions. We expect a natural avalanche cycle on Thursday; avoid avalanche terrain unless you have professional level training and experience.

Confidence

High

Avalanche Summary

No new avalanches reported in our area lately. Keep sharing your observations via the MIN; it helps strengthen our information gathering.

Snowpack Summary

Upper snowpack: around 20 cm of recent snowMid-pack: a softer, weaker layer of less cohesive snow around 40 to 50 cm down. Lower-pack: Further down in the snowpack, there are reports of a thick melt-freeze crust and increasing strength.

At 1000 m the snowpack depth is around 90 cm. Lower treeline and below treeline elevation are still below the threshold for avalanches.

Weather Summary

Wednesday NightIncoming storm delivering 15 to 20 cm overnight with strong southerly winds. Treeline temperature -3 to -5 C. Freezing level around 500m.

Thursday

Another 10 to 20 cm of snow brings storm accumulations around 30 to 40 cm. Moderate southwest wind. Freezing level steady around 500 to 700 m.

Friday

Light snow adding 5 to 10 cm. Light to moderate southwest wind. Freezing level around 500m and around -5 C near the peaks.

Saturday

Continued snow with another 10 cm. Moderate to strong southerly wind. Slightly warmer than Friday.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Avalanche Problems

Storm Slabs

Wind loaded slopes will be the most sensitive and dangerous, but many steep slopes will be suspect, even without any wind affect, especially during times of intense snow.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Very Likely

Expected Size: 1 - 2.5