Avalanche Forecast Jasper National Park

Date Issued: Valid Until:

Parks Canada garth lemke, Parks Canada

Avalanche Forecast

Thu Feb. 14th ยท 4:00PM

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Moderate
Deep Persistent Slabs Deep Persistent Slabs
Cornices Cornices

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Moderate

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low
Remember, moderate means human triggered avalanches possible. Heightened avalanche conditions exist on specific terrain thus evaluate snow and terrain carefully.

Weather Forecast

Friday will be flurries, 6cm of snow, high of -7, and light ridge winds. Saturday will be clouds, sun, and flurries, trace amounts of snow, lows of -25 and highs of -11 with light East winds. A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Some wind affect noted in the alpine and at tree line. Due to the recent cold temperatures there seems to be no slab over the persistent weakness sitting down 35-45cm (surface hoar, crusts, and/or facets). The bottom of the snowpack is structurally weak especially in shallow snowpack areas, consisting primarily of facets and depth hoar.

Avalanche Summary

No new avalanches on Thursday with good visibility. On Wednesday, one notable windslab in the alpine stepping down to ground. Loose dry avalanches up to size 2 have been naturally triggered in the facetting snowpack in steep shallow areas.

Confidence

Forecast snowfall amounts are uncertain on Friday

Problems

Deep Persistent Slabs

Deep Persistent Slabs

This problem could be triggered from shallow snowpack areas.

Be cautious in shallow snowpack areas where triggering is more likely.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

1.5 - 3.5
Cornices

Cornices

Somewhat of a warm up over the next few days from the previous frigid temperatures could generate some cornice failures

Pay attention to overhead hazards like cornices which could easily trigger the deep persistent slab.Avoid travel on slopes that are exposed to cornices overhead.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible - Unlikely

Expected Size

1 - 2.5