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Avalanche Forecast

Archived

Nov 23rd, 2014–Nov 24th, 2014

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Below Threshold.
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 [email protected].

Confidence

Poor - Due to the number of field observations

Weather Forecast

Monday: A moist system is due to arrive late in the day, bringing light to moderate precipitation. Freezing level climbing to around 2000 m. Moderate to strong SW winds.Tuesday/Wednesday: A second vigorous frontal system is expected to bring moderate to heavy precipitation with the freezing level lowering to around 1500 m. Moderate to strong W to SW winds. There is uncertainty around the track and intensity of this system. It looks like it could hit the Coquihalla area more intensely than the Duffey at this stage. Stay tuned for updates.

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.