Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Warming trend a welcome change. Increasing hazard for Ice Climbers in steep solar aspects.
Start early, finish early!
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- If triggered dry loose point releases can form deeper deposits in terrain traps.
- Be wary of slopes that did not previously avalanche.
Avalanche Problem 2: Loose Dry
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Late afternoon problem in steep, solar rocky terrain. Found to be entraining the surrounding, facetted snowpack and will build up volume quickly.
Travel and Terrain Advice
- Avoid ice climbs exposed to steep rocky terrain on solar aspects during the middle of the day.
- Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
Avalanche Summary
Explosive assisted, solar induced, loose dry avalanches to sz 1.5 in BTL south and south-west aspects entraining the facets and running fast.
Snowpack Summary
Facetting has weakened the snowpack in isolated areas in the forecast region. Melt freeze cycle BTL with moist surface snow on steeper, rocky solar aspects. The upper snowpack is 50 to 80 cm, over the seasonally persistent instability. Wind effect in open areas in the alpine and treeline elevations.
Weather Forecast
Spring like warming trend with a distinct south westerly flow. Freezing levels rising to treeline elevations into the weekend. Trace to 10cm of snow overnight Thursday and clearing by Friday afternoon. Strong, gusting westerly winds in the Alpine.
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A cold, facetting, and structurally weak slab up to 80cm thick overlies faceted crystals (well developed in shallow areas). Low elevations will present as a loose dry avalanche problem.