Avalanche Forecast
Issued: Nov 26th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
kdevine,
Avalanche Canada
Watch for changing conditions as strong winds may mean that wind slabs become increasingly reactive throughout the day.
Summary
Confidence
Weather Forecast
THURSDAY NIGHT - Cloudy with clear periods and isolated flurries / southwest wind, 20-50 km/h / alpine low temperature near -8
FRIDAY - Mainly cloudy with scattered flurries / southwest wind, 25-50 km/h / alpine high temperature near -4 / freezing level 1000 m
SATURDAY - A mix of sun and cloud with isolated flurries / west wind, 20-40 km/h, easing in the afternoon / alpine high temperature near -8 / freezing level 900 m
SUNDAY - A mix of sun and cloud / southwest wind, 15-30 km/h / alpine high temperature near -3
Avalanche Summary
Strong winds are likely forming fresh wind slabs, which may become more reactive throughout the day.
There have been very few reports of avalanches in the region, however observations are limited at this time.
In the past week there have been a few size 2 avalanches reported on the early November crust. These have been triggered by both humans and explosives.
If you get out into the mountains, please consider sharing your observations on the Mountain Information Network!
Snowpack Summary
Strong winds on Thursday night and Friday will likely be forming fresh wind slabs at upper elevations. Expect these wind slabs to be the most reactive in areas that saw more than 10 cm of new snow over the past week. There is a crust from early November that is down approximately 50-75 cm. This layer has been observed to have weak, sugary facets above and below it. Recent observations of this layer indicate that it has the potential to be triggered by humans.
Terrain and Travel
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
- In times of uncertainty conservative terrain choices are our best defense.
Problems
Wind Slabs
Strong winds are likely forming fresh wind slabs, which may become increasingly reactive throughout the day.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
A crust from early November exists down about 50-75 cm. This layer has weak, sugary facets above and below it. Recent observations suggest that it has the potential to be triggered by humans.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Nov 27th, 2020 4:00PM
