Avalanche Forecast
Issued: Mar 24th, 2022 8:03PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs, Loose Wet and Persistent Slabs.
catherine brown,
Summary
Weather Forecast
Ridge of high pressure breaks down on Friday with another approaching weather system for the weekend.
Fri: Cloud and sun, Alp Temp: -3, Wind: SW 15-30, Fz lvl: 1800 m
Sat: Flurries, 4 cm, Alp Temp -2, Wind: SW 15, gust to 40, Fz lvl: 1900 m
Sun Flurries, Alp Temp high +1, Wind Light to 20, Fz lvl: 2000 m
Snowpack Summary
10-15 cm new snow overnight Wednesday with moderate winds covers a variety of spring surfaces. These include rain crust up to 2200m and solar crust into the alpine, and remnant wind slabs on alpine polar aspects buried on March 23. The March 11th crust is buried 40-70cm to 2000m and higher on solar asp.
Avalanche Summary
Loose wet natural activity was observed along the highway corridor over Wednesday night and into Thursday.Â
Observations of natural activity in the backcountry Thursday included wind slabs and wet slabs, MIN.
On Tuesday there were several loose wet avalanches observed in the HWY corridor, to size of 1.5.Â
Confidence
Intensity of incoming weather systems is uncertain
Problems
Wind Slabs
Approximately 10-20cm of new snow fell overnight on Wednesday, coupled with moderate south-westerly wind, and warm temperatures. Expect new wind slabs on exposed terrain features in the Alpine.
- Use caution in lee and cross-loaded terrain near ridge crests.
- Avoid freshly wind loaded features.
Aspects: North, North East, East.
Elevations: Alpine.
Likelihood
Expected Size
Loose Wet
High freezing levels and strong solar inputs over the last two days have weakened the snowpack below treeline.
- Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.
- Use extra caution on slopes if the snow is moist or wet.
Aspects: South, South West, West.
Elevations: Below Treeline.
Likelihood
Expected Size
Persistent Slabs
While avalanche activity on this layer is tapering off in Rogers Pass, human-triggered avalanches are still possible, especially on steep solar aspects. Our neighbors West of Rogers Pass continue to witness activity on this layer.
- Convex features and steep unsupported slopes on solar aspects will be most prone to triggering.
- Evaluate terrain features by digging and testing on adjacent, safe slopes.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 25th, 2022 4:00PM
