Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Highway 93 from Athabasca falls to Saskatchewan Crossing is closed for Avalanche control Monday and Tuesday
Avalanche Problem 1: Loose Dry
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Avoid ice climbs that are in terrain traps below large start zones.
- Be careful of loose dry power sluffing in steep terrain..
Avalanche Problem 2: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
solar aspects and elevations below the freezing level
Travel and Terrain Advice
- Cornices become weak with daytime heating.
- Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
rising freezing levels and large triggers like cornice failures may wake up deeper slab instabilities
Travel and Terrain Advice
- Be wary of large alpine slopes that did not previously avalanche.
Avalanche Summary
Warm temps and rising freezing levels are resulting in loose dry avalanches on shaded slopes and loose wet avalanches on solar slopes to treeline. Avalanches treeline and below are not propagating widely, occurring to size 2, slowing in terrain that levels out or has dense vegetation. Alpine slopes have slab potential and should become more active.
Snowpack Summary
A relatively cold winter created a structurally weak snowpack slowly warming under spring-like temps and strong solar radiation. Settlement and sintering is occurring with warmer temps and melt-freeze crusts are developing on steep solar slopes. Mid and lower snowpack weaknesses persist but are not reacting to shear tests or natural triggers.
Weather Forecast
Strong high pressure with southern warm air will persist for another 2-3 days bringing rising freezing levels into the alpine and strong sun effect throughout the forecast zone. A small change is expected for later in the week with a return to more seasonable temperatures. Flurries may accompany the change of systems on Thursday.
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Shaded aspects and elevations above the freezing level.