Persistent Slabs
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1.5–2.5
A weak layer surface hoar and/or facets is buried 40 to 60 cm and may become more reactive as the temperature rises in the coming days.
Watch for persistent slabs to become reactive as the temperature continues to rise over the next few days.
A weak layer surface hoar and/or facets is buried 40 to 60 cm and may become more reactive as the temperature rises in the coming days.
Loose dry avalanches will be likely in steep terrain where new snow hasn't formed a slab.
On Tuesday there were reports of large (size 2) dry loose avalanches running in steep terrain. These were stepping down to a weak layer of facets buried in late January. Expect this layer of facets to become more reactive as the temperature gradually warms and snow above becomes more cohesive.
Around 25 cm of new snow sits on 20 to 40 cm of mostly faceted snow. This all sits on a weak layer of surface hoar or facets buried in late January now buried 40 to 60 cm.
The mid and lower snowpack is generally well settled.
Thursday Night
Cloudy. 20 to 35 km/h west ridgetop wind. Treeline temperature -7 °C.
Friday
Cloudy. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.
Saturday
Mostly cloudy with 5 to 10 cm of snow. 30 to 50 km/h southwest ridgetop wind. Treeline temperature -1 °C.
Sunday
Mostly cloudy with 10 to 20 cm of snow. 30 to 70 km/h southwest ridgetop wind. Treeline temperature 0 °C.
More details can be found in the Mountain Weather Forecast.