Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 1–2
New snow and moderate to strong SW winds building fresh windslabs.
Bulletin d’avalanche
Voir sur la carteJasper
Apr 17 – 18, 2018Parks Canada
Archivé · expiré 8 years ago
Danger d’avalanche
Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
Points saillants
Winter continues, along with the associated great skiing and multitude of avalanche problems. Don't let sunny skies and powder affect your decision making.
Problèmes avalancheux
Cornices
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1.5–2.5
Large cornices in all areas of the bulletin region. When failing these can trigger persistent instabilities and the subsequent avalanches are proving large and destructive.
Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 2–3
40-100+ cm thick slabs overlie preserved facetted crystals on N aspects, these have been reactive recently.
Weather Forecast
A shallow ridge of high pressure brings clearer weather while Arctic air to the north lingers until Wednesday, continuing to cool the local airmass.Moderate to strong SW winds Tuesday night will taper into Wednesday. Alpine temps will be Low -9, High -4, with the freezing level reaching 1800m mid-day.
Snowpack Summary
New soft slabs and varied degrees of wind effect found in all open areas. The upper snowpack is very sensitive to changes in temps, solar, or precipitation of any kind. Persistent slab will continue be a reoccurring problem, especially where no previous activity has been noted.
Avalanche Summary
Visibility improved over the day and we observed evidence of a wide spread cycle capturing all sorts of problems! Deep wide slabs from steep, rocky terrain. Numerous point releases. Soft slab releases from new loaded and wind pressed features.