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Archived

Avalanche Forecast

Dec 16th, 2024–Dec 17th, 2024
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Conditions are generally safe, but keep in mind small, isolated avalanches are still possible with low hazard.

Continue to assess your route carefully and follow safe travel practices.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported. Last Friday and Thursday, north of Stewart, several explosive and rider-triggered wind slab avalanches occurred up to size 1.5.

Wind slabs like these are becoming less likely to trigger, but may remain sensitive to human triggers in isolated areas, particularly where they overlay surface hoar.

Snowpack Summary

On the surface, around 15 to 30 cm of snow has combined over the last two storms. At higher elevations, this snow is likely heavily wind-affected and rests on a thick rain crust. In some areas around Terrace and Stewart, it may also be overlying weak surface hoar or facets.

Recent strong winds have varied in direction, so wind slabs may be present on all aspects. These slabs should bond quickly, but may be more reactive where they overlie the weak surface hoar and facets.

The mid and lower snowpack are not concerning at this time, and are made up of various hard layers, or moist snow at lower elevations.

Weather Summary

Monday Night

Mostly Clear. 30 to 40 km/h southeast ridgetop wind. Treeline temperature -12 °C.

Tuesday

A mix of sun and cloud. 30 to 40 km/h southeast ridgetop wind. Treeline temperature -9 °C.

Wednesday

Cloudy with 2 to 10 cm of snow. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -6 °C

Thursday

Cloudy with 2 to 10 cm of snow. 40 to 60 km/h southeast ridgetop wind. Treeline temperature -4 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Wind slabs are isolated, but may remain reactive.

Avalanche Problems

Wind Slabs

Recent strong winds have varied in direction, so watch for isolated wind slabs on all aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5