Avalanche Forecast
Issued: Apr 26th, 2019 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
Timothy Johnson,
Parks Canada
Watch for reverse loading as the wind direction switches to the North late Saturday.
Summary
Weather Forecast
Parker Ridge:
Saturday: Cloudy with sunny periods and isolated flurries. Treeline temperature: High -5 C.
Ridge wind north: 20 km/h gusting to 75 km/h.
Freezing level: 1500 metres.
Sunday : Flurries. Accumulation: 6 cm. Treeline temperature: Low -12 C, High -6 C.
Mostly light ridge wind occasionally gusting to 35 km/h.
Freezing level: 1600 metres.
Snowpack Summary
10cm of snow is forecast for Parker Ridge on Saturday. This new snow will overly several crusts / facet layers in the upper 40cm, and a faceted layer down 70cm on shady aspects. Watch for a switch in wind direction Saturday afternoon to the north. Windslabs can be expected on most aspects in the alpine.
Avalanche Summary
Recent signs of cornice failure and wind slabs in the high alpine.
Confidence
Timing, track, or intensity of incoming weather system is uncertain on Saturday
Problems
Wind Slabs
Expect windslab on most aspects in the alpine.
- Watch for whumphing, hollow sounds and shooting cracks.
- Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.
Aspects: North, North East, East, South East, South, South West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Snow on Saturday night could increase the likelihood of triggering.
- Carefully evaluate terrain features by digging and testing on adjacent, safe slopes.
- Note recent avalanche activity.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 27th, 2019 4:00PM
