Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Possible
- Tamaño
- 1.5–3
Weak layers in the middle of the snowpack may still be possible to trigger where there is no supportive crust.
Storm slabs will be more reactive in areas where wind has redistributed new snow over crusts.
Choose simple terrain and avoid overhead avalanche hazard.
Weak layers in the middle of the snowpack may still be possible to trigger where there is no supportive crust.
Storm snow is expected to be reactive, especially where wind loading is observed. Deeper and more reactive deposits are expected in wind affected terrain.
A large size 3 natural avalanche was reported in the southeast of the region on Monday. It was suspected to have released on the crust layer formed in mid November.
On Wednesday, we expect reactive storm slabs especially where storm snow is being redistributed by strong wind and forming slabs over a crust.
Roughly 15 to 20 cm of storm snow will accumulate by mid-day Wednesday. This brings the total depth of unconsolidated new snow to roughly 40 cm.
This new snow will be redistributed by strong wind forming new slabs over a settled snowpack at upper elevations and a crust at lower elevations.
There are two layers in the mid and lower snowpack that we continue to track:
A surface hoar layer down 80 to 100 cm
A crust from mid November sits 90 to 130 cm deep, with faceted snow above.
Cloudy. 10 to 15 cm of snow. 30 km/h south ridgetop wind. Treeline temperature -4 °C. Freezing level 1100 m.
Mostly cloudy. 4 to 10 cm of snow. 40 km/h west ridgetop wind. Treeline temperature -7 °C.
Mostly cloudy. 4 to 10 cm of snow. 40 km/h south ridgetop wind. Treeline temperature -6 °C.
Mostly cloudy. 5 to 10 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -9 °C.
More details can be found in the Mountain Weather Forecast.