Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Warm temps, broken skies, irregular strong solar effect! Feels very spring-like.
This is a transitional time for the snowpack continue to treat the terrain cautiously. Plan for the dawn patrol, enjoy the sun and get back early for happy hour!
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be wary of slopes that did not previously avalanche.
- If triggered dry loose point releases can form deeper deposits in terrain traps.
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
- Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
- Avoid ice climbs exposed to steep rocky terrain on solar aspects during the middle of the day.
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 on Wednesday.
Snowpack Summary
Facetting has weakened the snowpack in isolated areas through the forecast region. Melt freeze, spring-like cycle beginning in ernest BTL. Variable, moist surface snow on steep, rocky solar aspects. Less so on BTL, ski-able, solar slopes where broken cloud and cooling winds are keeping the surface dry. Wind effect in open areas in the ALP and TL.
Weather Forecast
Spring like warming trend with a distinct south westerly flow. Freezing levels rising to treeline elevations into the weekend. Trace, to upwards of 10cm of snow overnight Friday won't stick around long with daytime solar and warming for Saturday. Freezing level to 1700m, light west winds and, Alpine temps; High of -6.
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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.