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Archived

Avalanche Forecast

Dec 1st, 2024–Dec 2nd, 2024
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
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

Avoid being in or under avalanche terrain during periods of rapid loading from new snow and wind.

Confidence

Low

Avalanche Summary

On Saturday multiple very large (size 3) avalanches were reported near the Wolf's Den area north of Terrace.

On Friday several large and very large natural avalanches were reported near Shames. See the photo below for more details.

With continued precipitation and strong winds in the forecast we can expect this natural avalanche cycle to continue into Monday.

Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

More precipitation and strong southwesterly winds in the forecast are expected to continue building storm slabs throughout the night and into Monday.

80 cm or more of recent storm snow may be overlying variable snow surfaces, including small facets and/or surface hoar in sheltered areas and heavily wind-affected snow in exposed terrain.

A crust from early November can be found down 120 to 150 cm. Below this prominent crust are several other crust layers from October.

 

Weather Summary

Sunday Night

Cloudy with 15 to 20 cm of snow. 45 to 55 km/h southwest ridgetop wind, ~80 km/h near the coast. Treeline temperature -2 °C.

Monday

Cloudy with 10 to 20 cm of snow expected, with the highest amounts being close to the coast. Light to moderate rain below 750 m. 45 to 55 km/h southwest ridgetop wind, ~80 km/h near the coast. Treeline temperature -1 °C. Freezing level rising to 1000 m.

Tuesday

Cloudy with 10 to 20 cm of snow above the snow line, light to moderate rain below. 50-70 km/h southwest ridgetop wind. Freezing level rising to 2500 m.

Wednesday

Cloudy with light to moderate rain. 45-55 km/h southwest ridgetop wind. Freezing level around 2200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Don't let the desire for deep powder pull you into high consequence terrain.
  • Be aware of the potential for human triggerable storm slabs at lower elevations, even on small features.

Avalanche Problems

Storm Slabs

Avalanches will be most likely where new snow and wind are rapidly loading slopes. The largest and most reactive slabs will likely be on north through east aspects below ridgetops.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1.5 - 3