Use caution as you transition into wind-affected terrain.
Pockets of lingering wind slabs may still surprise riders.
Lingering wind slabs may still be present in leeward terrain features. Triggering will remain possible, especially on steep, unsupported convex slopes.
No recent avalanches have been reported recently, but whumpfs were noticed Sunday at treeline on a north-east slope near Fraser Peak. This failure layer is suspected to be the buried surface hoar layer that produced some isolated but surprising avalanches last Wednesday.
Field observations have been limited, if you're out in the backcountry, please consider submitting your observations to the Mountain Information Network.
Up to 20 cm of snow covers old, firm, wind-affected or crusty surfaces. Deeper deposits may exist on lee slopes. Pockets of hard wind slabs, that may not bond well to the old surface, still linger in alpine terrain.In isolated areas, buried surface hoar may be found 20 to 40 cm deep. Below 1500 m, a thick melt-freeze crust is buried 50 to 100 cm deep. The mid-pack is generally strong and bridges the weak crystals at the base of the snowpack.
The average snowpack depth at treeline is around 200 cm.
Tuesday Night
Cloudy with 3 to 5 cm of new snow expected. 40 to 50 km/h south ridgetop wind. Treeline temperatures around -12 °C.
Wednesday
Cloudy with 5 cm of new snow expected, plus 10 cm overnight. 40 to 50 km/h southwest ridgetop wind. Treeline temperatures around -6 °C
Thursday
Cloudy with 10-15 cm of new snow expected. 50 to 60 km/h southwest ridgetop wind. Treeline temperatures around -1 °C.
Friday
Cloudy with no precipitation. cm of new snow expected. 30 to 40 km/h south ridgetop wind. Treeline temperatures around -3 °C.
More details can be found in the Mountain Weather Forecast.
