Avalanche Forecast
Issued: Jan 17th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
dboucher,
Avalanche Canada
Watch for newly developed wind slabs that may be still reactive to human triggers. Be particularly careful around wind-loaded ridgelines and cross-loaded features mid slope.
Summary
Confidence
High - We have a good understanding of the snowpack structure and confidence in the weather forecast
Weather Forecast
An upper ridge will build along the BC coast overnight into Tuesday morning bringing generally dry conditions.
MONDAY NIGHT: Mainly cloudy with isolated flurries, trace of precipitation, 30-50 km/h southwesterly winds becoming northwesterly, low alpine temperature -2 C with freezing level around 1500 m.
TUESDAY: Mainly cloudy with isolated flurries, trace of precipitation, 20-30 km/h northwesterly winds, high alpine temperature -3 C with freezing level around 1300 m.
WEDNESDAY: Cloudy with isolated flurries, accumulation 1-3 cm, 20-40 km/h southwesterly winds, high alpine temperature -5 C with freezing level around 700 m.
THURSDAY: Flurries, accumulation 5-10 cm, 50-70 km/h southwesterly winds, high alpine temperature -3 C with freezing level going up to 1500 m.
Avalanche Summary
No new avalanche activity have been reported over the weekend.
Snowpack Summary
Mixed precipitation and warm temperatures over the last week have created a variety of surface snow conditions. Recent snowfalls with moderate to strong southwest winds have created pockets of dry snow at alpine elevations. Precipitation fell as wet snow or rain below 2000m, creating saturated upper snowpack that has now formed a melt freeze crust with moist snow below.Â
Two buried weak layers of sugary, faceted grains sit in the middle and lower snowpack, around 50cm deep and 80-200 cm deep. Early Decembers heavy rain and following cold spell formed the deeper layer of facets, that is now most prominent between 1700 and 2100 m. With cooler temperatures, the probability of triggering an avalanche on this layer is low but will increase when freezing levels rise up again. The most likely place to trigger it would be in thin, rocky snowpack areas.
The lower snowpack is well-settled and strong.
Terrain and Travel
- Be careful as you transition into wind affected terrain.
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
- Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
Problems
Wind Slabs
Wind slabs from new snow and strong southwest winds have developed and may be still reactive to human triggers. Take care around wind-loaded ridgelines and cross-loaded features mid slope.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Jan 18th, 2022 4:00PM
