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Avalanche Forecast

Archived

Dec 5th, 2019–Dec 6th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Kick the tires and light the fires! Reports of excellent skiing at treeline right now.

Weather Forecast

More snow on the horizon. 

Friday: Periods of snow. Up to 15cm with temps around -5 to -10. Light to moderate SW winds.

Saturday: Flurries with up to 10cm. Light SW winds and temps ranging from -5 to -15.

Sunday: Sun and cloud with cooler temps -10 to -20 with mostly light winds

Details here: Mountain Weather Forecast.

Snowpack Summary

Up to 30cm of new snow in the Columbia Icefields area fell on to a mix of surfaces; surface facets, surface hoar, and previous wind slab and/or hard wind pressed surfaces. The moderate winds built soft wind slabs at ridge tops. Oct. and Nov. crusts are preserved in the mid and lower snowpack and both seem have a good bond to the overlaying snow.

Avalanche Summary

Avalanche control work in the Parker Ridge area yesterday produced little results, only 2 soft size 2 wind slabs were triggered from 15 explosive shots. On our drive back to town we had decent visibility and observed no new natural avalanches.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Saturday

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.