Avalanche Forecast

Issued: Nov 22nd, 2018 4:00PM

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

deryl kelly, Parks Canada

Jasper.

Trace amounts of precip in the forecast, not nearly enough for a reset of the terrain. Good riding can still be found on sheltered lee locations.

Summary

Weather Forecast

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Snowpack Summary

Traces of new snow with more small amounts expected over the weekend. The Oct 25 crust is 2-4cm thick and down 60 to 80cm with facets above and below it. Hard progressive collapse failures have been observed immediately below this crust in test profiles. Early season hazards lurking beneath the shallow snowpack remain a concern.

Avalanche Summary

No new avalanches observed or reported. Afternoon visibility poor.

Confidence

Problems

Deep Persistent Slabs

Assume all skiable slopes have this crust, and assess the strength of the interface before jumping into any committing lines.

Watch for whumpfing, hollow sounds, and shooting cracks.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 2.5

Wind Slabs

New snow and wind will create windslab in lee features.

Use caution in lee areas in the alpine and treeline. Recent storm snow has formed wind slabs.If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 2

Valid until: Nov 23rd, 2018 4:00PM