Avalanche Forecast
Issued: Jan 8th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Cornices and Wind Slabs.
dboucher,
Avalanche Canada
Freezing level rising and temperature warming will increase the avalanche danger thoughout the day. Large cornices may become weak and easy to trigger.
Summary
Confidence
Moderate - Uncertainty is due to how the snowpack will react to the forecast weather.
Weather Forecast
The freezing levels will rise significantly to over 2000 metres on Sunday but with no precipitation forecast.
SATURDAY NIGHT: Cloudy with flurries, accumulation 5 to 10 cm, 40-50 km/h southwest wind, treeline temperature -2 C with freezing level rising to 900 m.
SUNDAY: A mix of sun and cloud, no precipitation, 50-70 km/h south wind, treeline temperature 0 C with freezing level rising to 2400 m.
MONDAY: Cloudy with snow and rain, accumulation 10 to 20 cm above 1500 m and rain below, 70-90 km/h southwest wind, treeline temperature +2 C.
TUESDAY: Cloudy with snow and rain, accumulation 35 to 60 cm above 1500 m and rain below, 60-80 km/h southwest wind, treeline temperature +3 C.
Avalanche Summary
Several wind slab avalanches were triggered naturally, by riders, and explosives in the last few days. They were generally 30 to 40 cm deep, on north aspects, and at treeline elevations. These slabs may still be triggerable naturally or by riders on Sunday. Below 1200 m, small pinwheels were observed out of steep terrain from Thursday night's rain.
We'd appreciate any observations while you are out travelling on the Mountain Information Network.
Snowpack Summary
Wind slabs may still be found in steep, lee terrain features, which formed from recent 40 to 60 cm of snow and strong southeast to southwest wind. The snow surface below about 1200 m consists of a hard melt-freeze crust from recent rain. This overlies 100+ cm of snow that accumulated since January 1, which reports suggest is bonding well to the snowpack.
The middle and base of the snowpack are strong, consisting of well-bonded snow and various hard melt-freeze crusts.
Terrain and Travel
- Cornices become weak with daytime heating.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
- Cornice failures could trigger very large and destructive avalanches.
- Be careful as you transition into wind affected terrain.
Problems
Cornices
With rising freezing level and temperature warming during the day, large cornices developed with recent snow and wind may become weak and easy to trigger. Also, keep in mind that cornice failure may trigger large avalanches.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Wind Slabs
Wind slabs have formed from recent snow and strong southerly wind. Expect to find them in steep, lee terrain features near ridges.
Aspects: North, North East, East, West, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 9th, 2022 4:00PM
