Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Persistent weaknesses are present and active in the northern bulletin region, like the slack-country off Marmot Basin Ski Hill, Portal Creek, and the Tonquin.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Watch for surface cracking and stiffer surface layers of snow.
- Watch for whumpfing, hollow sounds, and shooting cracks.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Variable direction, strong upper elevation winds are continuing to create fresh windslabs and stiffen the snow surface well into Treeline locations.
Travel and Terrain Advice
- The best powder will be found in sheltered locations at or below treeline.
- Avoid avalanche terrain during periods of heavy loading from new wind.
Avalanche Summary
No new avalanche activity observed or reported.
Snowpack Summary
Available snow has been redistributed by strong, variable direction winds. At all elevations, where transported, new wind slabs will be sensitive to triggering. A persistent slab, down 50 to 80cm, is prevalent through the forecast region. Any large TL avalanche terrain that has not obviously avalanched should be expertly managed or, avoided.
Weather Forecast
Gusty North winds expected to persist overnight and through the day Sunday. Temperatures will continue to drop with overnight temperatures to -27, and Sunday's daytime high near -23 for the whole bulletin region.
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Whumpfing and cracking are signs of this layer's reactivity. Expect long propagation with a wind-stiffened snow surface.