Avalanche Forecast
Issued: Nov 18th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Loose Dry.
Jesse Milner,
Expect to find illegal snowmobile tracks in the Parkers Ridge Area. Windslab avalanches have been triggered recently by skiers. Please post to the MIN. https://www.avalanche.ca/mountain-information-network/
Summary
Weather Forecast
Overnight: Flurries. 8 cm. -9. Light W wind.
Thursday: Cloudy with sunny periods and isolated flurries. High -7. Wind W: 15 km/h gusting to 40 km/h.
Friday: Flurries. 7 cm. Low -13, High -9. Wind SW: 20 km/h gusting to 50 km/h.
Saturday: Cloudy with sunny periods and isolated flurries. Low -12, High -10. Wind W: 15 km/h gusting to 50 km/h.
Snowpack Summary
Yesterdays rain up to treeline have formed a new surface crust. Up to 15cm of new snow brings the snowpack to 45-75cm at treeline. The Nov. 4th rain crust exists up to 2600m depending on location in the forecast area, and is up to 50cm deep. SW winds have formed wind slabs in exposed terrain that have been reactive to skier traffic.
Avalanche Summary
On Monday a size 2 skier triggered wind slab avalanche above the Hilda Hostel at Parker Ridge failed down 70cm sending blocks of concrete like snow into the trees. Recent report of a size 2 skier triggered windslab in the alpine on a east aspect wind loaded feature.Â
Confidence
Due to the number of field observations
Problems
Wind Slabs
New snow and moderate SW winds are forming wind slabs in the Alpine and high Treeline features. A skier triggered wind slab at Parker Ridge on Monday shows that deep wind slabs are still reactive to human loads. See the MIN for more details.
- Use caution in lee areas. Recent wind loading have created wind slabs.
- Be careful with wind loaded pockets while approaching and climbing ice routes.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Dry
Cool temps, winds and recent snowfall promoting loose dry avalanches in steep terrain.
- Be cautious of sluffing in steep terrain.
Aspects: All aspects.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Nov 19th, 2020 4:00PM
