Avalanche Forecast
Issued: Mar 10th, 2020 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
Grant Statham,
Parks Canada
Another storm overnight on Tues will bring another 15 cm to the snowpack along with strong winds. The danger will rise accordingly on Wed but should improve slightly through the week as the storm passes and the temperatures drop late in the week.
Summary
Weather Forecast
A system moves through the area starting end of the day on Tuesday that will deposit 10-15 cm of new snow across the park, accompanied by strong westerly winds. Temperatures on Wed will continue in the -5 to -15 range. The snow will continue through until Friday when the temperature drops for a short blast of -25 on the weekend.
Snowpack Summary
Moderate to strong winds on Tues and overnight Wed will have blown snow and created small windslabs directly beside ridge crests that are prone to human triggers. In some areas, this snow overlies buried sun crusts formed in late February. The deep snowpack of Little Yoho is generally quite strong with few weaknesses.
Avalanche Summary
The ski resorts reported easy ski cutting of 10-15 cm windslabs (size 1) formed through the day on Tuesday and observed a cornice fall in very steep terrain that triggered a size 2 windslab on the slope below.
Confidence
Problems
Wind Slabs
Additional snow and wind overnight on Tuesday has created localized windslabs that can be triggered by humans but seems unlikely to release naturally in the absence of a trigger. Careful route finding to get off ridges and onto smooth slopes.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 11th, 2020 4:00PM
