Avalanche Forecast
Issued: Jan 22nd, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs, Cornices and Wind Slabs.
Lynnea Baker,
Alpine inversions and high freezing levels are forecasted throughout the start of the week.
Minimize overhead hazard wherever possible. Cornices weaken with high alpine temperatures.
Summary
Weather Forecast
Sun: Cloudy. Strong W winds. Alpine temperature inversion with an alpine high of -1.
Mon: Cloudy with scattered flurries, accumulation 4 cm. Moderate W winds. Alpine high -6. FL valley bottom.
Tues: Mainly cloudy with isolated flurries. Strong SW winds. Alpine temperature inversion, high -8.
Snowpack Summary
A hard rain crust exist on all aspects up to 2000m. Alpine surfaces range from hard windslab in lees and to bare ground. Well settled midpack. Facets above Dec 4 crust down 150-200 cm. A 20-60 cm thick Nov crust complex completes snowpack to ground.
Avalanche Summary
Few natural windslab avalanches, size 1 - 2, observed in park today likely triggered by solar input this afternoon. Thanks to everyone posting on the Mountain Information Network, keep up the great work, we really do read them.
Confidence
Freezing levels are uncertain
Problems
Persistent Slabs
Strong alpine inversions and high freezing levels will test persistent layers and cornices in sheltered alpine features . Minimize overhead hazard as temps at higher elevations are likely warmer than valley bottoms.
- Pay attention to overhead hazards like cornices which could easily trigger persistent slabs.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
Alpine inversions may cause cornices to weaken. Cornice triggered avalanches could step down to persistent weak layers.
- Avoid travel on slopes that are exposed to cornices overhead.
- Pay attention to overhead hazards like cornices; which could trigger large avalanches.
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
Few natural avalanches size 1 - 2 seen steep alpine terrain around park on Saturday, Jan 22, likely triggered by solar input.
- Be careful with wind loaded pockets, especially in steep confined alpine terrain.
Aspects: North, North East, East, South East, South, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 25th, 2022 4:00PM
