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Avalanche Forecast

Archived

Nov 15th, 2017–Nov 16th, 2017

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

Regions

Glacier.

This morning's hazard is Moderate, but will rise to Considerable this afternoon. Still, early season conditions, ski and ride cautiously.

Weather Forecast

As a low-pressure system pushes inland from the Pacific we should see, 10cm of new snow today and another 10cm tonight. Winds will be moderate out of the South gusting to strong and the freezing level will rise to 1200m. Incremental snowfalls will continue through the week, temperatures will gradually fall with moderate westerly winds.

Snowpack Summary

At treeline, we've seen roughly 30 cm of recent storm snow and the Halloween crust is now buried approximately 60 cm. The Halloween crust sits on 30-50cm of rounded grains and mixed forms which seems to be bonding well for the time being. Below treeline, the height of snow diminishes quickly below 1700m. No recent Alpine observations.

Avalanche Summary

No new avalanche activity observed yesterday in the Highway corridor or reported from riders in the backcountry. Still minimal observations!

Confidence

Due to the number of field observations

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.