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Avalanche Forecast

Archived

Nov 30th, 2014–Dec 1st, 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.

We do not have enough information to issue danger ratings for this region. Click on the forecast details tab to see a weather forecast. If you have been out in the mountains, please send your observations to us at [email protected]

Weather Forecast

High cloud developing Sunday evening is forecast to remain over the region for the next few days. There is some very light precipitation associated with this cloud that may bring about 1-3 cm of snow on Monday and Tuesday. Westerly winds on Monday may become strong by Tuesday. Cold temperatures should start to warm up by Wednesday.

Avalanche Summary

There are no new observations from the region. Please let us know what you're seeing out there. Email us at [email protected].

Snowpack Summary

As we begin our forecasting season, we are working with limited information from the field. This forecast is primarily based off weather station data and a few field observations from the past week or two. Approximately 20-30 cm of cold dry snow has fallen in the past couple days, mainly in the southern part of the region. Moderate or strong easterly winds may have blown this snow into stiff wind slabs in exposed lee terrain. Be alert to signs of wind loading like patterns on the snow surface, variable new snow depths, and dense or hollow sounding snow. A potential weak layer interface (crust and faceted snow) may be buried 30-50 cm deep. Check the bond of the snowpack at this level and take a cautious approach.

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.