Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1–3
New windslab formed by recent SW winds could be reactive and if triggered, could step down to the deep persistent slab.
Bulletin d’avalanche
Voir sur la carteJasper
Apr 2 – 3, 2017Parks Canada
Archivé · expiré 9 years ago
Danger d’avalanche
Tue
Wed
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Points saillants
Weaknesses deep the in the snowpack can be triggered from shallow areas or by large triggers. Daytime and solar heating will weaken cornices, avoid traveling under or to close to them.
Problèmes avalancheux
Cornices
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1–3
Cornice failure is hard to predict but is more likely with inputs like solar radiation and wind-loading.
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 2–4
This problem is unlikely to disappear. It can be triggered by large loads like cornice fall or windslab failure. Human triggering is most likely from shallow spots or on steep unsupported slopes.
Weather Forecast
Light flurries Monday afternoon with a mix of sun and cloud, light winds from the NW. Freezing level up to 1600m with an alpine high of -5. Clear skies and warming temps for Tuesday and Wednesday.
Snowpack Summary
12cm new snow in the past 36hrs, winds gusting to 60km/hr from SW building slab. The mid-pack is bridging the basal weakness, which consists of weak facets, depth hoar and the Nov rain crust. Isothermal conditions below tree-line on solar aspects.
Avalanche Summary
Recent cornice and windslab failures have triggered the deep persistent slab creating large full path avalanches that are traveling into valley bottoms. Loose wet avalanches have been occurring on steeper south and west aspect below tree-line.
Confidence
Timing or intensity of solar radiation is uncertain on Tuesday