Avalanche Forecast
Issued: Dec 25th, 2019 3:00PM
The alpine rating is Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeWatch for isolated pockets of wind slab lingering in immediate lees if you are headed for the alpine.
Summary
Confidence
High -
Weather Forecast
Wednesday night: Clear breaks. Light variable winds.
Thursday: Cloudy with scattered flurries beginning late in the day and bringing 10-15 cm of new snow by morning. Light to moderate southwest winds increasing over the day. Alpine high temperatures around -6 with freezing levels to 500 metres.
Friday: Cloudy. Light southwest winds becoming southeast. Alpine high temperatures around -5 with freezing levels to 700 metres.
Saturday: Cloudy with scattered flurries bringing 5-10 cm of new snow, increasing overnight. Moderate to strong south winds. Alpine high temperatures around -4 with freezing levels to 800 metres.
Avalanche Summary
No new avalanches have been reported in the region since the widespread natural avalanche cycle brought on by the storm at the end of last week.
Snowpack Summary
A new melt-freeze crust has been observed on the surface of sun-exposed aspects. Below it, 50-100 cm of snow from the storm at the end of last week forms the region's upper snowpack above about 1200 metres.
Another crust that formed before the end of the storm can be found down only about 10 cm. It has been observed acting as a bed surface for small point releases.
Collectively, all this recent snow is forming an increasingly strong bond with the melt-freeze crust present on the previous surface. Below this interface the lower snowpack is well settled and strong.
Below 1200 metres, our recent snow amounts diminish rapidly with elevation and are capped by a melt-freeze crust.
Terrain and Travel
- Carefully evaluate steep lines for wind slabs.
- Be careful as you transition into wind affected terrain.
Problems
Wind Slabs
Our recent storm snow has stabilized, but more recent small pockets of wind slab may remain reactive to human triggering above around 1200 m. Use extra caution on steep slopes near ridges, where snow may have been blown into deeper deposits.
Aspects: North, North East, East, West, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Dec 26th, 2019 5:00PM