Avalanche Forecast

Archived

Nov 22nd, 2014–Nov 23rd, 2014

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Regions

Northwest Inland.

Stormy conditions over the next few days. Avalanche conditions may change quickly at alpine elevations.

Confidence

Fair - Due to the number of field observations

Weather Forecast

Sunday: Light precipitation. SW winds increasing. Freezing level around 400 m. Monday: 5-15 mm precipitation with strong SW to W winds. Rising temperatures.Tuesday: Light precipitation. Freezing level lowering to around 300 m. W winds easing.

Avalanche Summary

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

Snowpack Summary

Welcome to winter! 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 the recent 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.