Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Forecasted snow (5-8cm) shouldn't be enough to overload persistent weaknesses in the upper snowpack.
Due the variable distribution of these layers it would behoove you to keep monitoring the sensitivity of any slope before you commit to riding it!
Avalanche Problem 1: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be cautious as you transition into wind affected terrain.
- Be careful with wind loaded pockets while approaching and climbing ice routes.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
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.
Travel and Terrain Advice
- Watch for whumpfing, hollow sounds, and shooting cracks.
Avalanche Summary
Natural avalanches up to size 1.5 were observed Tuesday in windswept alpine moraine features. Appears to be running on the persistent slab interface dow 30 to 50cm.
Snowpack Summary
Windslab continues to build in open areas and sits above 3 weak interfaces in the top 30 to 50cm of the snowpack. The distribution of these surface hoar/facet layers varies with the terrain, but is most predominant in lee features at TL and into the alpine. Field teams continue to monitor the sensitivity of these layers carefully, as should you!
Weather Forecast
The incoming storms have mostly blown themselves out by the time they get into the forecast area. For Wednesday, expect as much as 5 to 8cm overnight the through the morning Thursday. Alpine High -6C. Ridge wind light to moderate SW, gusting to moderate values.
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Small inputs of fresh 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.