Cornices
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–3
Cornices are large, looming, and can trigger large avalanches on the slopes below. Cornices will become increasingly fragile as temperatures rise through the weekend.
A hot sun and rising freezing levels will cause avalanche hazard to rise through the day and over the weekend.
Cornices are large, looming, and can trigger large avalanches on the slopes below. Cornices will become increasingly fragile as temperatures rise through the weekend.
Winds may leave more reactive deposits around ridge lines and lee features. Strong solar radiation may increase the reactivity of recently formed storm slabs, especially on steep slopes in the alpine.
Watch for sunny skies and warm spring temperatures to trigger wet loose avalanches on solar slopes and lower elevations. Expect this problem to increase at upper elevations over the weekend alongside rising freezing levels.
At upper elevations, wind, sun, and spring temperatures continue to impact 20 to 40 cm of recent powder. Below the recent snow is a hard crust that exists on all aspects to at least 2500 m.
The mid and lower snowpack is well settled and strong in most areas.
On Thursday, riders triggered storm slab avalanches to size 2. Several occurred on northerly aspects in the afternoon, possibly influenced by daytime warming encouraging loose snow to gain cohesion.
On Tuesday and Wednesday, ridgers triggered storm and wind slabs to size 2, many on northerly aspects and steep alpine slopes. On Wednesday, a size 3.5 avalanche failed naturally in the last 24 hours on a south aspect at 2300 m, likely triggered by solar input.
Friday Night
Clear skies. 20 km/h west ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.
Saturday
Sunny. 20 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.
Sunday
Sunny. 30 km/h southwest ridgetop wind. Treeline temperature 2 °C. Freezing level 2300 m.
Monday
Mostly sunny. 30 km/h southwest ridgetop wind. Treeline temperature 6 °C. Freezing level 2800 m.
More details can be found in the Mountain Weather Forecast.