Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Winter continues, along with the associated great skiing and multitude of avalanche problems. Don't let sunny skies and powder affect your decision making.
Avalanche Problem 1: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Use caution in lee areas. Recent wind loading has created wind slabs.
- If triggered the wind slabs may step down to deeper facet layers resulting in larger avalanches.
Avalanche Problem 2: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
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.
Travel and Terrain Advice
- Avoid travel on slopes that are exposed to cornices overhead.
- Minimize overhead exposure during periods of heavy loading from new snow, wind.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
40-100+ cm thick slabs overlie preserved facetted crystals on N aspects, these have been reactive recently.
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.
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.
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.
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New snow and moderate to strong SW winds building fresh windslabs.