Avalanche Forecast
Avalanche Bulletin - Jasper National Park
Incoming new snow should improve the skiing significantly. Check the bond of this new snow to the previous surfaces carefully before committing to any big terrain.
Avalanche Problem 1: Storm Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
Travel and Terrain Advice
- Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
- Use caution in lee areas. Recent wind loading have created storm slabs.
Avalanche Problem 2: Loose Wet
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
With the freezing level forecast to be as high as 1900m on Friday, this could be a significant problem at lower elevations (particularly on ice climbs).
Travel and Terrain Advice
- Use caution above cliffs where small avalanches may have severe consequences.
- Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.
Avalanche Problem 3: Persistent Slabs
What Elevation?
Which Slopes?
Chances of Avalanches?
Expected Size?
At upper elevations polar aspects still held cold, faceted snow and did not receive either solar triggers or significant snowpack settlement this past week. Steep, unsupported slopes should be treated with due respect.
Avalanche Summary
No new avalanche activity has been observed or reported.
Snowpack Summary
Fresh snow with light (gusting moderate) Northerly winds is building fresh storm slabs in exposed areas. Incoming snow is falling on a melt-freeze crust on solar aspects below 3000m and old facetted wind slabs on polar aspects above 1700m. The weak Feb. 8th interface under the old windslabs may remain a concern on high north aspects.
Weather Forecast
An unusual upper level flow is creating a weather pattern that is unusual and challenging for the weather models to predict.
Friday: Cloudy with snow (up to 15cm). Alpine temps: Low -5 C, High -3 C. Ridge wind light. Freezing level: 1900m.
Saturday: Flurries. (up to 5cm). Alpine temps: Low -7 C, High -3 C. Light ridge wind. Freezing level: 1900m.
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Fresh storm slabs may 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 any avalanche start zones.