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Archived

Avalanche Forecast

Dec 12th, 2024–Dec 13th, 2024
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
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

Heavy rain, snow, and strong winds are certain to elevate avalanche danger ratings in upper elevation terrain.

Confidence

High

Avalanche Summary

There have been no recent avalanche reports in the region.

Increasing snowfall mixed with rain and strong southwest wind are certain to induce a natural avalanche cycle.

If you are going out in the backcountry, please consider sharing your observations to the Mountain Information Network (MIN).

Snowpack Summary

New snow mixed with rain will bury a firm crust at treeline and will become increasingly unstable as the new snow rapidly gets deeper. North through east-facing slopes in the alpine may have buried surface hoar which sits over moist snow.

Snow depths at treeline vary across the region from 65 cm to 150 cm.

Weather Summary

Thursday Night

Cloudy with wet flurries 1 to 5 mm. 10 to 30 km/h southeast ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.

Friday

Snow at higher elevations and rain 20 to 40 mm. 25 to 75 km/h southeast ridgetop wind. Treeline temperature +1 °C. Freezing level 1200 m.

Saturday

Snow at higher elevations and rain 30 to 40 mm. 25 to 75 km/h southwest ridgetop wind. Treeline temperature +1 °C. Freezing level 1200 m.

Sunday

Snow 1 to 2 cm. 10 to 15 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Be careful with wind-loaded pockets, especially near ridge crests and rollovers.

Avalanche Problems

Loose Wet

As rain begins to unconsolidated and weaken the upper snowpack , expect naturally trigger avalanches to occur on all aspects and at elevations below 1700 m.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2

Wind Slabs

New and building wind slabs are likely to be forming on north aspect terrain.

Aspects: North, North East, South West, West, North West.

Elevations: Alpine.

Likelihood: Possible - Likely

Expected Size: 1 - 2