Avalanche Forecast
Issued: Feb 20th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
cgarritty,
Avalanche Canada
The chance of triggering an old wind slab on facets is quite low, but that won't matter if you find the sweet spot! Keep up safe travel practices and the extra caution around ridgelines.
Summary
Confidence
Moderate
Avalanche Summary
No new avalanches have been reported, but a large (size 2) natural slab avalanche was reported on Thursday in the alpine. Click on the picture for full details.
Given its solitary appearance amid widespread recent traffic in the White Pass area, this is the kind of avalanche that suggests a quite isolated problem, but one that could be triggered by the weight of a person or machine in a suspect location.
Snowpack Summary
Windblown light new snow amounts are beginning to bury new surface hoar at treeline, but mainly add to variable crusty and wind-affected snow at all elevations and on all aspects. Some softer snow may still be found in sheltered north-facing terrain.
An older layer of surface hoar may be found down 20 - 60 cm in isolated north-facing terrain features. Check out the field team's MIN from Thursday for more.
Below 1500 m, a thick melt-freeze crust is buried 50 - 100 cm deep.
Weather Summary
Tuesday night
Cloudy with scattered flurries bringing 1 - 2 cm of new snow. 40 - 50 km/h southwest alpine wind, increasing. Treeline temperature -5 °C.
Wednesday
Cloudy with isolated flurries, increasing overnight. 45-50 km/h southwest alpine wind, increasing. Treeline temperature -4 °C.
Thursday
Cloudy with continuing flurries bringing 3 - 8 cm of new snow and 3-day snow totals of up to 15 cm, continuing overnight. 60 - 70 km/h south alpine wind, increasing. Treeline temperature -3 °C.
Friday
Cloudy with isolated flurries and another 5-10 cm of new snow from the overnight period. 30-40 km/h southwest alpine wind. Treeline temperature -5 °C.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Carefully evaluate steep lines for wind slabs.
- Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
Problems
Wind Slabs
Elevated winds will begin transporting light new snow and minimal available loose snow into new slabs (likely small). Older, larger wind slabs could prove surprisingly reactive in isolated areas where preserved surface hoar is buried.
Aspects: North, North East, East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 21st, 2024 4:00PM
