Avalanche Forecast
Issued: Nov 27th, 2021 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Loose Dry, Wind Slabs and Deep Persistent Slabs.
Tereza Turecka,
Strong SW winds, rising freezing levels and up to 30 cm in the forecast for the next 24 hours.The response of the newly formed snowpack to these inputs is uncertain and it is recommended to approach it with caution.
Summary
Weather Forecast
Sunday: Snow: 16 cm. Alpine temperature: High -1 °C. wind southwest: 2gusting to 65 km/h. FL: 2000 metres.Monday: Snow: 4 cm. Alpine temperature: Low -7 °C, High -4 °C. Wind southwest: gusting to 70 km/h. FL: 1700 metres.Tuesday: Snow: 11 cm. Alpine temperature: Low -5 °C, High -4 °C. Wind southwest: gusting to 65 km/h. FL: 1500 metres.
Snowpack Summary
Relentless SW winds continue to hammer open areas, alpine and treeline. Hard windslab developing on lee features. Frenzied winds move any new snow, overloading steep features creating spindrift and a significant loose dry problem, especially concerning over ice climbing features. ~75cm of snow settled over the Nov 5th crust/facet combo at ground.
Avalanche Summary
Poor visibility, some loose dry natural activity observed on the Parkway on Friday. Field profile at 2100m (Parkers Ridge), sheltered BLT location, sandwiched in the trees ;) 1m HS, 20-30cm fist over stronger mid-pack. Nov. 5th crust found down 75cm. Hard compression test results on facets below crust.
Confidence
Problems
Loose Dry
There is plenty of new snow overflowing ledges, steep walls and creek beds over Ice climbs throughout the forecast region.
- Avoid travel on slopes that are exposed to cornices overhead.
- Be careful with wind loaded pockets while approaching and climbing ice routes.
Aspects: North, North East, East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
More new snow, moderately strong SW winds, and rising temperatures are in the forecast. These are great slab building conditions. Be very cautious in terrain with significant windward lee features and cornices
- Minimize overhead exposure during periods of heavy loading from new snow, wind.
- Avoid steep lee and cross-loaded slopes
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
60-80cm of storm snow from Nov 13-15th has settled over a series of crusts and weak snow crystals at the base of the snowpack.
- Avoid thin rocky or unsupported terrain features.
- Use caution on open slopes and convex rolls
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Nov 28th, 2021 4:00PM
