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.
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.
High freezing levels and strong solar inputs over the last two days have weakened the snowpack below treeline.
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
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.
Loose wet natural activity was observed along the highway corridor over Wednesday night and into Thursday.
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.
