Avalanche Forecast
Issued: Nov 28th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
ghelgeson,
Avalanche Canada
Last week's snow has been formed into wind slabs at upper elevations which may be sensitive to human triggering. Watch for wind slabs in the alpine and "alpine like" features at treeline.
Summary
Confidence
Weather Forecast
The weather forecast is rather unexciting for the Lizard/Flathead zone over the next few days.
SATURDAY NIGHT: Freezing level at valley bottom, light southwest wind, no precipitation expected.
SUNDAY: Clear skies, light to moderate west/southwest wind, freezing level rising to between 1000 and 1500 m, no precipitation expected.
MONDAY: Clear skies at dawn with increasing cloud cover building in after lunch, light to moderate southwest wind, freezing level rising to about 1000 m, no significant precipitation expected.
TUESDAY: Scattered cloud cover, freezing level around valley bottom, light southwest wind, no precipitation expected.
Avalanche Summary
Observations are limited right now, but there have been no reports of recent avalanches.
We appreciate the recent reports submitted to the Mountain Information Network. Keep them coming!
Snowpack Summary
Wind slabs have formed in open terrain as last weeks 10 to 20 cm of snow is redistributed and formed into more cohesive slabs. These slabs may sit above a layer of surface hoar in sheltered terrain and above a hard crust in other areas.
Snowpack depths at upper treeline elevations are nearing 100 cm and beginning to exceed the threshold for avalanches, while the snowpack is much thinner in the valleys.
The lower snowpack consists of crusts. Weak snow may be developing around these crusts in some areas, which will be a snowpack feature to monitor as the season progresses.
Terrain and Travel
- Avoid areas where the snow feels stiff and/or slabby.
- Avoid freshly wind loaded terrain features.
- Watch for signs of slab formation throughout the day.
Problems
Wind Slabs
Watch for freshly formed wind slabs in the alpine, and "alpine like" features at treeline. These slabs may be poorly bonded to underlying crust and surface hoar layers, although the distribution of these layers is uncertain.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Nov 29th, 2020 4:00PM
