Avalanche Forecast
Avalanche Bulletin - Jasper National Park
A noticeable hiatus in the Spring transition is giving plenty of opportunity to get good riding on dry snow.
Persistent instabilities will persist for the remainder of the season...
Don't, don't, don't, don't! Don't you, forget about me!
Avalanche Problem 1: Wind Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be careful with wind loaded pockets while approaching and climbing ice routes.
- Use caution on open slopes and convex rolls
Avalanche Problem 2: Cornices
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Cornices are growing with fresh snow additions. Several failures were noted, in most cases triggering a slab below.
Travel and Terrain Advice
- Pay attention to overhead hazards like cornices which could easily trigger deep slabs.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Wind slabs sit on a hard melt-freeze crust on solar aspects, and facets on polar aspects. Assess the bond at these interfaces carefully before committing to to a slope.
Travel and Terrain Advice
- Avoid shallow snowpack areas where triggering is more likely.
Avalanche Summary
No new avalanches reported or observed. Field team reported finding signs of lingering instability at TL; whumphing and cracking but could not get anything to initiate into a slide.
Snowpack Summary
A variety of slab conditions exist on most aspects at treeline and above. 10-20cm of recent storm snow has created a settled new wind slab. This slab can be up to 30cm thick . Below this, older slabs up to 60cm thick sit on a sun-crust on solar aspects and facets on polar aspects. Below treeline the snow is shallow.
Weather Forecast
"La Nina" spring continuing (cool and moist). Next 24hrs expect continued broken skies, no significant precip and alpine temperatures to reach a high of -8°C. Light winds through the region.
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In most cases this interface presents as a manageable surface instability and is expected to go dormant pretty quickly. Pay close attention to any fellow travelers above and/or below you as enter fresh terrain.