New snow and strong winds will be building reactive slabs - stick to conservative terrain.
New snow combined with southerly winds is expected to form reactive new wind slabs on lee slopes. These slabs may be more reactive where they overlie buried surface hoar.
A weak layer of facets may be found 70 to 200 cm deep. In shallower inland areas, weak depth hoar exists to ground. Avoid steep, rocky, and thin snowpack areas where this layer could be triggered.
No new avalanches have been reported.
With up to 20 cm of new snow and strong winds in the forecast, the danger has been elevated. This means large natural avalanches are possible and human-triggering is likely.
Observations are still limited, so be sure to post yours to the MIN if you get out!
Up to 30 cm of new snow accompanied by strong southerly winds is expected overnight and through Wednesday. The highest snowfall amounts are for the White Pass area, with lesser amounts inland.
A crust with surface hoar overtop may be found 20 to 50 cm deep in sheltered areas. Wind slabs may be more reactive where they overlie this layer.
A weak layer of facets is buried 70–200 cm. It remains a concern where the snowpack transitions from thin to thick in White Pass and is the primary issue in shallower inland areas with basal depth hoar.
Tuesday Night
Cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 60 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1300 m.
Wednesday
Cloudy. 5 to 10 mm of precipitation as snow or rain at treeline. 40 km/h south ridgetop wind. Treeline temperature 0 °C. Freezing level 1300 m.
Thursday
Mostly cloudy. 5 to 20 mm of precipitation as snow or rain at treeline. 70 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1300 m.
Friday
Mostly cloudy. 1 to 3 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 700 m.
More details can be found in the Mountain Weather Forecast.
