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Avalanche Forecast

Archived

Dec 3rd, 2016–Dec 4th, 2016

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

Regions

Jasper.

Found creamy turns in sheltered areas below tree-line. Busy Saturday on Parkway Ice-climbs. Keep vigilant to building overhead hazard.

Weather Forecast

Everything seems to be headed on a downward trend. Strong and extreme sw winds subsiding, snow tapering off (<10cm) and, temperatures dropping to arctic values (overnight values near -20).

Snowpack Summary

Variable winds and snow squalls though the Parkers area adding further load and snow for transport. Touchy wind slabs 50+cm on some open features at TL and above. Trump crust (Nov 12) is exposed in open Alpine features on the windward side and down 40 to 70cms or more in the lee. As usual, strong temperature gradient promoting facetting.

Avalanche Summary

Field team in Parkers and Hilda area on Saturday. Still seeing long shooting cracks in front of skis. Limited alpine observations due to poor visibility. Some evidence of a mid storm cycle.

Confidence

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

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.