Avalanche Forecast
Issued: Mar 23rd, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
Ross Campbell,
Fresh wind slabs will be deposited on Wednesday evening as a cold front hits Rogers Pass.
Human-triggered avalanches are likely on cross loaded terrain features and lee slopes in the Alpine and exposed areas of Treeline.
Summary
Weather Forecast
Thursday's forecast is calling for a mix of sun and cloud after Wednesday's cold front passes by. Temperatures are expected to fall to -10 overnight on wednesday, with a Alpine high of -6 on Thursday. No precipitation is in the forecast until Saturday, where we could see some incremental snow.
Snowpack Summary
Recent storm snow is swiftly settling with the warm temps, and was moist on the surface up TL elevation on Tuesday. Strong wind, new snow, and above average temps will likely build fresh slabs in the Alp and exposed areas of TL on Wednesday afternoon into the overnight period. The March 11th crust is buried 40-70cm to 2000m and higher on solar asp.
Avalanche Summary
On Tuesday there were several loose wet avalanches observed in the HWY corridor, to size of 1.5. Most of them started in steep unsupported terrain at lower elevations. No new avalanches were reported from the backcountry on Wednesday or observed in the HWY corridor.
Confidence
Problems
Wind Slabs
Approximately 10-20cm of new snow is forecasted to fall on Wednesday, coupled with strong south-westerly wind, and warm temperatures. Expect new wind slabs on exposed terrain features in the Alpine and exposed areas of TL.
- Watch for surface cracking and stiffer surface layers of snow.
- Use caution in lee and cross-loaded terrain near ridge crests.
Aspects: All aspects.
Elevations: Alpine, 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.
- Evaluate terrain features by digging and testing on adjacent, safe slopes.
- Convex features and steep unsupported slopes on solar aspects will be most prone to triggering.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 24th, 2022 4:00PM
