Avalanche Forecast
Issued: Dec 19th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
jleblanc,
Avalanche Canada
Closely monitor how the new snow is bonding to the old surface.
With low-density snow, be aware of the potential for small loose avalanches in steep terrain.
Summary
Confidence
Moderate
Avalanche Summary
No recent avalanches have been reported recently. Keep sharing your observations by submitting a MIN report! They are especially helpful in the early season when snowpack information can be limited.
Snowpack Summary
The snowpack is thin and averages 100 cm deep at treeline. The surface is now a variety of crusts, heavily wind-affected snow in exposed areas and drier snow on upper north slopes.
Down approximately 70 cm, a buried layer contains decomposed surface hoar crystals. There is also a layer of weak, sugary crystals near the base of the snowpack. Neither of these layers has produced avalanches, but uncertainty remains on the effect of cold temperatures on these deep layers.
Weather Summary
A weather system from the Pacific will spread moderate snowfalls to this region Tuesday. A return to drier conditions with cold temperatures and strong outflow winds continues for the rest of the week.
Monday night
Snow 10-15 cm. Westerly wind at 20-30 km/h at ridge tops. Low of -15 ËšC.
Tuesday
Snow 5 cm. Westerly wind at 40-50 km/h at ridge tops. High of -12 ËšC.
Wednesday
Partly cloudy. No precipitation. Northwest wind at 30 km/h at ridge tops. High of -15 ËšC.
Thursday
Cloudy. No precipitation. Southeasterly wind at 40 km/h at ridge tops. High of -12 ËšC.
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.
- Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.
- Early season avalanches at any elevation have the potential to be particularly dangerous due to obstacles that are exposed or just below the surface.
Problems
Wind Slabs
Forecasted snow amounts and moderate winds will rapidly create wind slabs in open terrain. Wind slabs could be reactive as they overlie a crust, buried surface hoar or hard wind-affected surface. Closely monitor how the new snow is bonding to the old surface.
Aspects: North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Dec 20th, 2022 4:00PM
