Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Highway 93 south of Jasper to Saskatchewan crossing and the Maligne road remain closed for avalanche control
Avalanche Problem 1: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.
- Cornices become weak with daytime heating.
Avalanche Problem 2: Loose Dry
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
More shaded aspects and elevations above the freezing level.
Travel and Terrain Advice
- Avoid ice climbs that are in terrain traps below large start zones.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Rising freezing levels and large triggers like smaller avalanches 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 at upper elevations and loose wet avalanches on solar slopes below treeline. Avalanches below treeline are to size 2. Alpine slopes have also released as slabs to midpack and have entrained snow up to size 2.5, but have potential to size 3.
Snowpack Summary
Our structurally weak snowpack is slowly warming under spring-like temps and strong solar radiation. Settlement and sintering is occurring in the upper snowpack with warmer temps and melt-freeze crusts forming on steep solar slopes. Mid and lower snowpack weaknesses persist but tend to be reactive only on alpine solar facing slopes.
Weather Forecast
Strong high pressure with southern warm air will continue to Wednesday evening with freezing levels close to 3000m and strong solar effect throughout the forecast zone. Wednesday night/Thursday brings cloud cover and more seasonable temperatures with light flurries, a change that persists into the weekend.
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solar aspects and elevations below the freezing level