Avalanche Forecast
Issued: Nov 25th, 2018 4:22PM
The alpine rating is Deep Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeNot much snow at lower elevations in Little Yoho and ice climbs are just starting to form. This bulletin is currently based on mostly on information gathered in the Banff, Kootenay and Yoho forecast region.
Summary
Weather Forecast
Forecasts for Monday vary significantly from a trace of new snow to between 5-10 cm. It looks like winds will increase to the moderate range out of the SW and treeline temperatures will stay between -10 and -5 C.
Snowpack Summary
5-10 cm of recent snow sits over sun crust on steep south slopes or surface hoar on sheltered N aspects. Thin wind slabs exist in the alpine. The October 26 crust is generally found 10-30 cm above the ground with large facets growing both above and below it. The snowpack averages 40-85 cm at 2200m across the region and is weakening as it facets.
Avalanche Summary
Plenty of whumphfing on the October 26 crust and facet layer in the last several days. One explosive controlled size 2 failing on the Oct 26 crust was reported in the alpine at Lake Louise on Sunday. Ski cutting produced a thin new snow slab on a steep alpine S aspect at Sunshine Village on Sunday. No new natural avalanche activity observed.
Confidence
Due to the number and quality of field observations
Problems
Deep Persistent Slabs
Occasional reports continue of skier remote and explosive triggered slabs on the October 26 crust and facet layer. Avoid steep terrain where a stiffer, more cohesive slab exists over these weak, faceted crystals near the base of the snowpack.
If you are increasing your exposure to avalanche terrain, do it gradually as you gather information.Whumpfing is direct evidence of a buried instability.
Aspects: North, North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Nov 26th, 2018 4:00PM