Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Likely
- Dimensione
- 1–4
Watch for wind slabs on lee features at treeline and in the alpine.
Bollettino valanghe
Vedi sulla mappaSouth Rockies
Jan 21 – 22, 2012Avalanche Canada
Archiviato · scaduto 15 years ago
Pericolo valanghe
Mon
Tue
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Problemi valanghivi
Storm Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Likely
- Dimensione
- 1–5
A classic recipe for storm slabs has evolved: moderate snowfall with rising temperatures landing on loose dry snow. Watch for storm snow avalanches, especially in steep or convex terrain.
Confidence
Fair - Due to variable snopack conditions
Weather Forecast
Sunday: light snowfall / moderate to strong westerly winds / freezing level at surfaceMonday: Light snowfall / moderate to strong southwest winds / freezing level at surfaceTuesday: moderate snowfall / strong southwest winds / freezing level at surface
Avalanche Summary
No new avalanche observations to report. Avalanche activity can be expected in the wake of Saturday's weather.
Snowpack Summary
Over the week 40-60cm of snow formed soft slabs over a crust/facet/surface hoar combo. Snowfall, wind and warming on late Friday/Saturday have created a more reactive storm slab problem as dense snow now over-rides colder, lighter snow where weaknesses are more likely to endure. Deeper in the snowpack, a surface hoar layer buried in early December remains a concern, as avalanches triggered on this layer would be destructive. However, information is limited about its current reactivity. From preliminary observations, the rapid storm snow load over the past week did not cause any releases on this layer. Basal facets also exist in many parts of the region.Facets sandwiched between two firm layers in the top metre of the snowpack are being monitored in the south-east.