Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Good skiing is found in the region with continued winter like conditions.
Avalanche Problem 1: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- If triggered the wind slabs may step down to deeper layers resulting in large avalanches.
- Use caution on open slopes and convex rolls
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Persistent slabs sit on facets on North aspects and a hard melt-freeze crust on solar aspects. Use a cautious approach in open terrain and assess the bond at these interfaces before committing to a slope.
Travel and Terrain Advice
- Watch for signs of instability such as whumpfing, or cracking.
Avalanche Problem 3: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Cornices continue to grow with fresh snow and wind. Several failures were noted in the past week with some triggering a slab below. Potential for cornice failures increases with sun and warmth.
Travel and Terrain Advice
- Minimize exposure during periods of loading from new snow and wind.
- Give cornices a wide berth when travelling on or below ridges.
Avalanche Summary
Read and share conditions in the region by visiting Avalanche Canada's Mountain Information Network
Cornice failures reported early last week have triggered persistent slabs below ridge-tops.
Snowpack Summary
Snow from March 30th and light amounts since has been blown in to an isolated wind slab up to 30cm thick. This has added to the previous slab sitting on a sun-crust on solar aspects and facets on North aspects - buried as deep as 60cm. The snowpack is generally facetted and weak underneath the slab particularly in shallow areas.
Weather Forecast
Sunday will be sun and isolated flurries, trace of snow, high of -2, light West winds and 2100m freezing level. Monday will be flurries, trace snow, -5 to -3, and light gusting moderate West winds. Tuesday will be flurries, 5-10cm of snow, -6 to -1, and light gusting strong SW winds.
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Windslabs have developed in exposed alpine and treeline locations 10-30cm thick. They are generally well bonded but pockets of instability exist. Some propagations of 50-100m were noted last week.