Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Regions
Northwest Inland.
A bit of new snow won't add much to our wind slab problems, but it might make them trickier to see. Choose a supported line and treat lee slopes with extra caution.
Confidence
High -
Weather Forecast
Wednesday night: Cloudy with scattered flurries bringing a trace to 3 cm of new snow. Moderate northwest winds.Thursday: Decreasing cloud and easing flurries finishing with a trace of new snow. Moderate northwest winds. Alpine high temperatures around -9, cooler at lower elevations under a mild temperature inversion.Friday: A mix of sun and cloud. Moderate to strong northeast winds, increasing over the day. Alpine high temperatures around -15 and cooling over the day. Saturday: Sunny. Moderate to strong northeast winds, easing over the day. Alpine high temperatures around -13.
Avalanche Summary
Observations from Monday showed small (size 1) wind slabs releasing naturally from steep, wind loaded pockets in the Howson range.Numerous avalanches were triggered by skiers and naturally within the recent storm snow on the weekend. Check out this MIN report describing widespread slab activity.
Snowpack Summary
Strong northeast winds have redistributed a recent 20 to 40 cm of storm snow in exposed terrain, forming wind slabs. Recent cold temperatures have been transforming the surface of this snow into a lower-density layer of faceted (sugary) grains at all elevations. Collectively, this layer of faceting storm snow overlies previously wind-affected snow in the high alpine and a widespread melt-freeze crust elsewhere. In the central and northern parts of the region, it may sit on feathery surface hoar crystals in sheltered terrain at all elevations. In the south of the region, the remainder of the snowpack has been reported as well-settled.Around and north of Hazelton, 50 to 100 cm of snow may overly two weak layers of surface hoar or sugary faceted grains.
Problems
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.