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Avalanche Forecast

Dec 28th, 2023–Dec 29th, 2023
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
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

Make observations and assess conditions continually as you travel.

Human-triggering is possible on steep wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

Small wind slabs (size 1) were reactive to rider traffic on steep unsupported alpine features in the McGillivray area on Wednesday.

Data in this region is limited. If you head out into the backcountry, please consider sharing your observations on the Mountain Information Network (MIN).

Snowpack Summary

10 to 20 cm of snow has fallen since Thursday, adding to 20 to 40 cm of heavily wind-affected snow from the past week. This recent snow sits on crusts and, in some sheltered areas, surface hoar. This layer has bonded poorly in neighbouring regions to the west and south, and in parts of this region could result in large wind slab avalanches.

Overall, the snow depth remains shallow, with average treeline snowpack depths between 70 and 100 cm.

Weather Summary

Thursday Night

Cloudy with trace accumulation, alpine wind south 30 to 50 km/h, treeline temperature around -3 °C, freezing level around 1400 m.

Friday

Mix of sun and cloud with no precipitation, alpine wind south 30 to 40 km/h, treeline temperature around +2 °C with freezing level climbing to 2400 m by evening.

Saturday

Mostly cloudy with up to 5 cm of snow in the afternoon, alpine wind south 30 to 50 km/h, treeline temperature around 0 °C with freezing level dropping to 1800 m.

Sunday

Cloudy with sunny periods, no precipitation, alpine wind southwest 20 km/h, treeline temperature around -3 °C, freezing level around 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Wind slabs may be poorly bonded to the underlying crust.

Avalanche Problems

Wind Slabs

Wind slabs will remain reactive to human triggering. There is a potential for wide propagation as slabs may rest on surface hoar and/or crust.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5