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Avalanche Forecast

Nov 26th, 2022–Nov 27th, 2022
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Howson, Hudson Bay, Kitimat, Microwave-Sinclair, Nass, Northwest Coastal, Rupert, Seven Sisters, Shames, Stewart, Telkwa, West Stikine.

85-150 cm of recent snow and strong southwest winds have formed storm slabs that will likely be reactive to human triggers; especially in wind-affected terrain at treeline and above.

Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Confidence

Moderate

Avalanche Summary

On Friday, numerous naturally triggered storm slab avalanches up to size 2 were reported at all elevations in the Terrace region. The majority of these avalanches occurred on wind-loaded aspects (E/NE) at Treeline and above.

Additionally, some very large (up to size 3.5) naturally triggered storm slab avalanches were reported on large alpine avalanche paths in the Bear Pass area.

Snowpack Summary

20-35 cm of new snow brings recent snow amounts to 85-150 cm at treeline and above. Strong southwest ridgetop winds have created thick wind slabs on lee aspects.

The recent snow overlies primarily hard snow surfaces.

The depth of the snowpack at treeline varies widely from 100-200 cm and tapers rapidly below treeline where the recent snow fell as rain.

Many early-season hazards such as rocks, stumps, and open creeks exist below treeline.

Weather Summary

Saturday Night

Clearing skies / Moderate northwest ridgetop winds / Low temperature at treeline -8 C / Freezing level valley bottom.

Sunday

Mostly sunny / Light northwest ridgetop winds / High temperature at treeline -5 C / Freezing level valley bottom.

Monday

Sunny / Light southeast ridgetop winds / High temperature at treeline -10 C / Freezing level valley bottom.

Tuesday

Sunny / Light northeast ridgetop winds / High temperature at treeline -13 C / Freezing level valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Shooting cracks, whumphs and recent avalanches are strong indicators of an unstable snowpack.
  • Expect slab conditions to change drastically as you move into wind exposed terrain.
  • Use small low consequence slopes to test the bond of the new snow.

Avalanche Problems

Storm Slabs

85-150 cm of recent snow and strong southwest winds have formed storm slabs that will continue to be reactive to human triggers; especially in wind-affected terrain at treeline and above.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1.5 - 3.5