Avalanche Forecast
Issued: Feb 9th, 2018 4:00PM
The alpine rating is Persistent Slabs and Storm Slabs.
, the treeline rating is , and the below treeline rating is Known problems includehttp://www.pc.gc.ca/apps/scond/cond_e.asp?oid=30728&opark=100092Please continue to avoid avalanche terrain. While natural avalanche activity is beginning to taper, human triggering will continue to be very touchy. Solar releases can be expected from rocky terrain.
Summary
Weather Forecast
A few days without precipitation and moderately cold temperatures are forecast. Sunny skies may produce solar releases from rocky areas. The crystal ball says more snow on Tuesday.
Snowpack Summary
Thursdays storm dropped 30 - 50cm with variable winds. This combined with other recent snow has overloaded the 3 main mid pack concerns which are the Jan 16th, Jan 6th, and Dec.15 weak layers. These are a mix of facets, crusts and surface hoar and can be found 70cm to over 150cm deep in the snowpack and are currently producing very large results.
Avalanche Summary
The avalanche cycle seems to be tapering but large, natural events to size 3.5 were noted today. Human triggering continues to be reported. Avalanche control today produced many large avalanches over paths that had been controlled very recently.
Confidence
Problems
Persistent Slabs
Three weak layers exist in the mid snowpack: Jan 16, Jan 6, and Dec 15. All are a mix of sun crust, surface hoar and facets depending on the aspect and elevation. These layers are very sensitive to triggering both naturally and by human triggering.
Avoid all avalanche terrain.Watch for whumpfing, hollow sounds, shooting cracks or recent avalanches.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Storm Slabs
There are storm slabs up to 1m thick on many aspects and elevations from the big storm on Thursday. These will be highly sensitive to triggering and once initiated, can step down to the deeper persistent layers causing very large avalanches.
If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Feb 10th, 2018 4:00PM