Avalanche Forecast
Issued: Mar 21st, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Deep Persistent Slabs.
Darren vonk,
Parks Canada
Expect freshly formed wind slabs in the alpine and open tree line features. Don't let the fresh snow entice you into getting into bigger terrain. The Medical and emergency services are stretched thin.
Summary
Weather Forecast
Sun: Mostly cloudy sky's 4cm snow accompanied by gusty 50km/h winds out of the SW
Mon: SNOW! 15cm High -6 Gusty winds continue to 40km/h out of the SW
Tues: An additional 7cm of snow. HIgh -10 With light winds.
More detailed forecast at: Mountain weather forecast
Snowpack Summary
A supportive Melt freeze crust now exists on all Solar aspects to Alpine elevation. Scoured from previous winds. Old hard slabs exists in the alpine and open tree line. More confidence in the southern snowpack. Cornices remain an overhead hazard,
Avalanche Summary
2 Sz 1.5 Wet slab avalanches observed that hit the highway (93s) last night due to solar warming.
Confidence
Problems
Wind Slabs
As the snow falls, it will be sitting on a variety of surfaces, from Melt freeze crusts to Scoured wind hammered and sastrugi. The bond will depend on the temperatures during the storm.
- Use caution in lee areas. Recent wind loading has created wind slabs.
- Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.
Aspects: North East, East, South East.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Deep Persistent Slabs
This problem will require a large trigger, thin spots, increased loading or rapid day time warming.
- Avoid shallow snowpack areas where triggering is more likely.
- Be aware of the potential for full depth avalanches due to weak layers at the base of the snowpack.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Mar 22nd, 2020 4:00PM
