Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Regions
Glacier.
Active weather means increasing avalanche hazard. Careful snowpack evaluation is required before committing to your line.
Weather Forecast
A SW flow brings precipitation and rising freezing levels to Rogers Pass. Cloudy with scattered flurries and up to 4cm today and 7cm tonight. Freezing levels rise to 1300m this afternoon with ridge winds gusting to 65km/h from the SW. The bulk of this weekend's precipitation arrives on Friday (15cm) but light snow will continue into next week.
Snowpack Summary
Another 4cm overnight brings the 48hr total to 20cm of new snow at treeline. Strong southerly winds have contributed to loading of lee features and the formation of isolated soft slabs. The Feb 14 layer, down ~50cm, is a crust everywhere but N aspects above 1600m where pockets of surface hoar may lurk.
Avalanche Summary
Several natural wind slab avalanches ranging from size 1.5-2.5 were observed in in steep terrain facing the highway corridor east of Rogers Pass. A suspected cornice fall triggered a size 2.5 avalanche on Mt Green, west of Rogers Pass. We received a report of a skier accidental size 1, triggered in a wind slab on Puff Daddy.
Confidence
Intensity of incoming weather systems is uncertain
Problems
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.