Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible
- Dimensione
- 1–3
Stiff wind slabs in the alpine and open areas at treeline may be triggered by skiers and riders.
Bollettino valanghe
Vedi sulla mappaPurcells
Dec 9 – 10, 2011Avalanche Canada
Archiviato · scaduto 15 years ago
Pericolo valanghe
Sun
Mon
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Problemi valanghivi
Persistent Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Unlikely - Possible
- Dimensione
- 2–5
The weak facetted layer near the ground may still be triggered by human activity. Areas with a lot of variability in the snow cover may be the most suspect. Triggering may occur from weak spots like rocks or clumps of small trees.
Confidence
Fair - Due to limited field observations
Weather Forecast
Saturday: Expect high clouds with winds reaching 40-70 km/h from the southwest and temperatures climbing to -5. Sunday & Monday: The ridge rebuilds giving mostly clear skies and moderate westerly winds. Freezing levels could peak at 1200m on Monday.
Avalanche Summary
Reports of a few small explosive released avalanches in the Dogtooth.
Snowpack Summary
Surface hoar continues to grow and the cold weather is penetrating into the upper snowpack giving near surface facetting. Steep south facing slopes may have developed a thin sun-crust. Windslabs continue to lurk in lee areas in the alpine and open treeline. Snow depths are quite variable through the region with 130-150cm in the alpine. There is still concern for triggering the weak basal facets/depth hoar, as these layers have shown sudden collapse results in stability test in shallow areas.