Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Spring has sprung.
An early start, and avoidance during the heat of the day is essential for safe travel in avalanche terrain right now.
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.
- Avoid ice climbs exposed to steep rocky terrain on solar aspects during the middle of the day.
Avalanche Problem 2: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
As daily temperature swings push further and further in to the upper snowpack, slab avalanches may occur at several interfaces within the facetted and structurally weak mid and lower snowpack.
Travel and Terrain Advice
- Travel early before the heat of the day melts surface crusts, and avoid big slopes in the afternoon.
- Be wary of large slopes that did not previously avalanche.
Avalanche Summary
A loose wet natural avalanche cycle to size 2.0 was observed on a road patrol in the Maligne area on Sunday. Avalanche control at Marmot Basin on Saturday produced a size 2.0 cornice failure and one size 2.0 windslab avalanche. Report of an avalanche involvement on Kitty Hawk Satruday. Report of an avalanche on Polar Circus Friday.
Snowpack Summary
A melt freeze cycle is in progress at treeline and below. Expect moist surface snow and loose wet avalanches on solar aspects in the afternoon. In open areas in the alpine and at treeline the upper snowpack is generally wind effected. Previous cold temps have left a weak mid and lower snowpack structure in most locations.
Weather Forecast
An upper level ridge remains over our area until mid-week.
Monday: Sunny, Alpine High 0, Low -3. Ridge winds Light West. Freezing Level 2300m.
Tuesday: Sunny, Alpine High 2, Low -2. Ridge winds Light SW. Freezing level 2600m.
Wednesday: Cloudy with sunny periods and isolated flurries.
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Late afternoon problem in steep, solar rocky terrain. Also found to be entraining the surrounding, facetted snowpack and will build up volume and speed quickly.