Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Good skiing can be found in sheltered terrain.
Persistent weak layers continue to show isolated signs of reactivity, this problem will likely persist for some time.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Watch for signs of instability such as whumpfing, or cracking.
- Avoid shallow snowpack areas where triggering is more likely.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
In most cases this interface presents as a manageable surface instability and is expected to go dormant pretty quickly.
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 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, in most cases triggering a slab below.
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
No new avalanches observed or reported
Snowpack Summary
Recent snow 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 polar aspects - these are now buried as deep as 60cm. Underneath the variable slab in the upper snowpack, as well as in shallow areas, the snowpack is generally facetted and weak.
Weather Forecast
The timeless struggle between good (spring wx and evil (Arctic like wx) unfolds in the bulletin region. Good is forecast to come about yet, another surge of evil... er, arctic air will hold the cold front in place and, as a result, cold. The systems continue to mix through the weekend and fxs are calling for more of the same in the short term.
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Persistent slabs sit on facets on polar aspects (more reactive recently), and a hard melt-freeze crust on solar aspects. Use a cautious approach in open terrain and assess the bond at these interfaces carefully before committing to a slope.