Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Expect a lot of variability in snow depth in exposed terrain from this week's gusty winds.
Avalanche Problem 1: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Watch for whumpfing, hollow sounds, and shooting cracks.
- The best powder will be found in sheltered locations at or below treeline.
Avalanche Problem 2: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Last week's storm snow with southwesterly winds will continue to build layers of windslab in lee features at ridge crests and open areas at TL and above.
Travel and Terrain Advice
- Be careful with wind loaded pockets while approaching and climbing ice routes.
- Be cautious as you transition into wind affected terrain.
Avalanche Summary
Natural windslab avalanches up to size 1.5 were observed Tuesday in windswept alpine moraine features. Appears to be running on the persistent slab interface down 30 to 50cm.
Snowpack Summary
Windslab building above 3 weak interfaces in the top 30 to 50cm of the snowpack. Depth of surface hoar/facet layers varies with the terrain and vegetation shelter, but is most consistently found in sheltered features at TL and above.
Weather Forecast
Cool (not cold) arctic air will keep precip to only light and scattered flurries through most of the weekend. Light to moderate SW winds gusting to moderate will accompany the cooler air.
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This problem is made up of 3 significant interfaces in the top 30-50cm of the snowpack. All interfaces seem to be slowly healing but have shown recent sensitivity to light loads in isolated locations.