Avalanche Forecast
Issued: Nov 27th, 2019 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
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Avalanche Canada
The most likely place to trigger avalanches is where the wind has formed new slabs at higher elevations.
Summary
Confidence
Weather Forecast
WEDNESDAY NIGHT: Clear, 40 km/h wind from the northeast, alpine temperatures drop to -12 C.
THURSDAY: Sunny, 20 km/h wind from the northeast, alpine high temperatures around -8 C.
FRIDAY: Sunny, light wind from the northeast, alpine high temperatures around -3 C.
SATURDAY: Sunny, light wind from the northeast, alpine high temperatures around -5 C.
Avalanche Summary
Last weekend's storm likely caused a widespread cycle of natural avalanches, but there have been few reports since then. Looking forward, avalanches may still be possible to trigger in any areas where the recent snow has buried a smooth surface and where wind has formed new slabs. Concern is reduced in areas where the snow depths have not yet reach the threshold for avalanches.
Snowpack Summary
Strong wind from the northeast has likely formed new wind slabs on west and south facing slopes at higher elevations. Last weekend's storm delivered much more snow in western parts of the region (e.g. 150 mm of precipitation at Shames and only 36 mm at Rosswood). Recent observations from Shames suggest this resulted in about 30 cm of snow at 750 m, 100 cm of snow at 1200 m, and likely over a metre of snow in the alpine (see this MIN report). While the storm snow has likely settled since then, there is still some uncertainty about how well it has bonded to crust that it buried.
Problems
Wind Slabs
You may find old hard slabs on all aspects and softer fresh slabs on west and south facing slopes. Picking out where the new snow sits on a smooth surface and where it is anchored in place by rocks may still be tricky.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Nov 28th, 2019 4:00PM
