Avalanche Forecast

Moderate

Natural avalanche activity has curtailed in the last 24hrs, with a few loose/dry sz 1-1.5 avalanches observed in the highway corridor in steep/extreme.

Artillery control produced excellent results on Tupper and Macdonald Sat night, with most shots producing sz 2 to sz 3 avalanches from steep start zones, running out onto valley bottom fans. Debris moved fast, likely picking up speed and mass on the buried surface hoar.

Up to 65cm of new snow sits on a sun crust on steep solar aspects. In sheltered locations, this new snow sits atop large surface hoar. Strong SW winds at the end of the storm created surface slab conditions on exposed Treeline and Alpine slopes.

There is a dense, well-settled mid-pack without any significant weak layers.

The Nov 9 crust is down 1-1.5m. The base of the snowpack is comprised of several dense, melt-freeze rain crusts formed in October.

The ridge of high pressure continues, with no significant change in the weather.

Tonight: Mainly cloudy, Alp low -11°C, light W winds, Freezing Level (FZL) 500m.

Tues: Cloudy with sunny periods, Alp high -7°C, light W winds, FZL 800m.

Wed: Clouds, isolated flurries, Alp high -4°C, light SW winds, FZL 1500m.

Thurs: Cloudy, isolated flurries, Alp high -4°C, light S winds, FZL 1300m.

• Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
• Make conservative terrain choices and avoid overhead hazard.
• Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.