Recent storm snow has overloaded the persistant weak layer casuing a large avalanche cycle. Avoid avalanche terrain and overhead hazard.
Please read the Mountain Conditions Report for a detailed avalanche summary.
Two persistent weak layers are buried down ~100 and ~130 cm. New snow combined with extreme winds has overloaded these weak layers triggering large, destructive avalanches. These weak layers are also still reactive to human triggering.
40-80 cm of storm snow has been redistributed by extreme Westerly winds. Storm slabs have formed in all exposed terrain and may become more ractive with solar warming. Storm slabs in motion may step down to deeper layers resulting in large avalanches.
Natural avalanche activity up to size 2.5 obsevered in the highway corridor or Saturday.
On Friday, numerous natural avalanches up to size 4 running into valley bottom. Avalanche control work on Friday night continued to produce large avalanches up to size 3.5.
See the following link to an Mountain Conditions Report. Also, look at this MIN.
A recent storm delivered approx. 70 cm of new snow with extreme southerly wind creating strom slabs.
The Feb 9 surface hoar (SH) is down 90-120 cm and remains reactive in snowpack testing. The Feb 9 SH sits over a crust on solar aspects.
The Jan 26th layer, composed of surface hoar/facets/crust, is buried down 130-160 cm. The largest surface hoar is preserved in sheltered areas below treeline.
Partial Sun on the weekend with another storm arriving Tuesday.
Tonight No precipitation, Wind SW 15-30km/h. Low -9°C. Wind West 25-70 km/h. Freezing level (FZL) valley bottom.
Sun - A mix of sun and cloud. High -3°C. SW wind 20 gusting 45km/hr. FZL 1500m.
Mon - Cloudy w/ sunny periods. High -2°C. Winds SW 20 gusting to 50km/hr. FZL 1700m.
Tues Snow, 14cm. High -3. Wind SW 25 gusting to 60.
