Avalanche Forecast

Issued: Dec 10th, 2017 4:00PM

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

a.l. horton, Parks Canada

Jasper.

Be extra cautious on steep solar aspects during the heat of the day. Pay attention to signs that upper snowpack is weakening (snowballing, moist or wet snow especially around rocky areas, water running over rocks etc.).

Summary

Weather Forecast

Temperatures will rise through the night on Sunday as the freezing level climbs to 3400m by mid-day on Monday.Â Winds will ease to Light Westerly and skies will be clear.Â Temperatures and freezing level will drop on Tuesday with similar weather expected on Wednesday.

Snowpack Summary

Melt freeze crust on steep solar aspects treeline and above. There is a well settled snowpack in most locations. A 30 - 70 cm thick slab overlies a crust and bonding appears to be strengthening at this interface. The Halloween Oct 31 crust sits near the bottom of the snowpack from treeline to 2700 m.

Avalanche Summary

No patrol occurred on Sunday. No avalanches reported.

Confidence

on Monday

Problems

Deep Persistent Slabs

Solar triggering is possible on steep south facing slopes.

Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Possible

Expected Size

2 - 3

Valid until: Dec 11th, 2017 4:00PM