Parks Canada Deryl Kelly, Parks Canada

Jasper National Park Avalanche Forecast

Jan 12th, 2020 4:00PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs and Deep Persistent Slabs.

Extremely cold for the foreseeable future.

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Summary

Weather Forecast

Unsettled winter weather as an Arctic front arching down from Alaska moves south. Easterly winds expected to increase as a southern BC low approaches. Trace flurries for the forecast region.

Visit CAA's Mountain Weather Forecast for more specific details.

Snowpack Summary

Surface faceting over previous wind effect in the ALP and TL lee and cross loaded features. This overlies a faceting and weakening mid-pack bridging basal facets and depth hoar.

Avalanche Summary

No new avalanches observed or reported

Confidence

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible

Expected Size

1 - 3

Avalanche activity has tapered off but human triggered avalanches are still likely.

  • Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.
  • If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

Likelihood

Possible - Unlikely

Expected Size

1 - 3

Numerous avalanches were observed throughout the region that failed to ground. Activity has tapered off but may be waiting for the human trigger.

  • Use caution on open slopes and convex rolls
  • Be aware of thin areas that may propogate to deeper instabilites.

Aspects:

All aspects.

Elevations:

All elevations.

Valid until: Jan 13th, 2020 4:00PM