Avalanche Forecast Jasper National Park

Date Issued: Valid Until:

Parks Canada Rupert wedgwood, Parks Canada

Avalanche Forecast

Wed Apr. 10th · 4:00PM

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Low

Below Treeline

Danger Ratings Low
Persistent Slabs Persistent Slabs

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Low

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Low

Below Treeline

Danger Ratings Low
Travel conditions are best in the morning. Avoid placing yourself below cornices which are weakening and present significant overhead hazard.

Weather Forecast

Diurnal temperature swing can be expected over the next 3 days. Tomorrow's winds will remain generally light with alpine highs of -3C. A mix of sun and cloud will limit the destabilizing influence of solar radiation on the snowpack. Up to 10cm of new snow is forecast for Friday.

Snowpack Summary

A supportive crust  exists to 2,100m near treeline. Higher up, at treeline and above, a winter snowpack remains on N aspects . Solar facing slopes have crusts extending higher into the alpine. At upper elevation a weak faceted layer buried down 20-50cm remains of concern. The snowpack sits on a weak base of facets and depth hoar.

Avalanche Summary

No new avalanche activity has been observed although signs of cornice failures have been  reported

Confidence

Forecast snowfall amounts are uncertain

Problems

Persistent Slabs

Persistent Slabs

Evidence from recent snowpack tests and whumphing would suggest that a weak layer of facets persists down 20-50cm in some areas, and may be becoming reactive with incremental loading from recent small snowfalls.

Carefully evaluate big terrain features by digging and testing on adjacent, safe slopes.Whumpfing, shooting cracks and recent avalanches are all strong inicators of unstable snowpack.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Possible - Unlikely

Expected Size

1.5 - 2.5