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Avalanche Forecast

Archived

Nov 25th, 2014–Nov 26th, 2014

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

South Coast.

Stormy conditions may lead to rapid changes in the snowpack. We have limited observations from the field. Send us yours at f[email protected].

Confidence

Fair - Due to the number of field observations

Weather Forecast

Wet, warm, and windy for the next couple of days before freezing levels plummet for the weekend. Wednesday: 20-40 mm of precipitation with freezing levels as high as 2400 m in the southern part of the region, cooler and drier in the northern areas, and moderate but gusty southwesterly winds. Thursday: another 30-50 mm of precipitation expected for the Coquihalla Pass area, less in the Duffy Lake area, with freezing levels dropping throughout the day to around 1700 m, and moderate but gusty southerly winds. Friday: Unsettled conditions with isolated flurries and sunny breaks, freezing levels in valley bottoms, and light winds.

Avalanche Summary

No avalanches have been reported. Please let us know what you're seeing out there at [email protected].

Snowpack Summary

As we begin our forecasting season, we are working with limited information from the field. Early reports suggest there's enough snow for avalanches at alpine and some treeline elevations. Recent snow is likely to have been redistributed into slabs on lee slopes at alpine elevations. This snow may overlie a weak old snow surface (surface hoar, facets and/or a crust) which developed during November's dry spell. Check the bond of the snowpack at this level and take a cautious approach as new snow builds deeper above this layer.

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.