Use caution around ridge crests and convex rolls on all aspects. Windslabs sitting on a hard crust may be triggered by the weight of a rider.
Wind direction has varied from southwest through northeast. The freshest wind slabs may be found on atypical aspects and features due to reverse-loading. Slabs have been reactive and slide surprisingly far on the underlying crust. The most likely place to trigger a wind slab is near ridge crest and on convex terrain features, where the slope rolls away from you.
Wednesday Night: Clearing through the night. No new snow expected. Moderate north ridgetop wind, strong at higher elevations. Alpine low around -7 °C.
Thursday: Sunny. No new snow expected. Light northwest wind. Freezing level rising to 500 m. Alpine high around -4 °C.
Friday: Increasing cloud through the day. Possible trace of snow expected. Ridgetop winds increasing to strong from the south by the afternoon. Freezing level around 500 m.
Saturday: Mostly cloudy. 0-5 cm of snow expected over night, and another 5-10 cm through the day. Strong southwest ridgetop winds, trending to extreme at higher elevations. Freezing level rising to between 500 m and 1000 m.
No new avalanches were reported on Wednesday before 4 pm.
On Tuesday, professional operations west of terrace reported a few natural, cornice triggered windslab avalanches up to size 2.5 in the alpine. There were also isolated reports from around the region of natural windslab avalanches up to size 2, and natural and rider triggered sluffing and loose dry avalanches up to size 2 in steep terrain.
On Monday, natural size 2.5 wind slab avalanches were reported east of Kitimat. Otherwise, avalanche activity was limited to thin size 1 wind slabs and loose dry sluffing up to size 1.5.
On Sunday, several skiers were surprised by a handful of separate incidents of accidentally and remotely triggered size 2-2.5 (large) storm slabs, including the one reported in this MIN. These avalanches slid on the thick crust beneath the most recent storm snow. At least one was on a previously skied slope.
On Wednesday, around 10 cm of new snow fell with mostly light winds. This new snow overlies a variety of old, generally wind-affected surfaces.
In the alpine, 30-50 cm of recent, variably wind-affected snow appears to be bonding poorly to the underlying crust. A surface crust exists at elevations below 1300 m.
The 10-30 cm thick rain crust beneath the recent snow effectively caps the underlying snowpack, making human triggering of avalanches on deeper weak layers very unlikely.
