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Avalanche Forecast

Archived

Nov 25th, 2012–Nov 26th, 2012

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.

This bulletin is based on limited data. Local variations in conditions are likely to exist. Check out the forecasters blog for further details on interpreting early season bulletins.

Confidence

Poor - Due to limited field observations

Weather Forecast

Skies will be mostly clear for Monday with increasing cloud on Tuesday. Moderate snowfall is expected by Wednesday. Ridgetop winds should be mostly light and variable switching to strong from the southwest with the approach of Wednesday's system. Freezing levels should hover at about 800m dropping to surface by Wednesday.

Avalanche Summary

There have been no new avalanches reported from the region. This may speak more to the lack of observations than actual occurrences. If you have any observations to share, please send us an email.

Snowpack Summary

Snow depths vary from 60cm in the Northern part of the region to about 115 cm in the Southern part of the region. Weather stations around the region recorded light accumulations on Friday and Saturday with up to 40 cm falling throughout last week. I expect new windslabs to have formed in exposed areas, particularly at higher elevations. These windslabs may take some time to bond and triggering may occur by additional light loads such as a person. The data used to produce our avalanche bulletins is extremely limited at this time of the year. Any information you have about the snowpack would be greatly appreciated. Please communicate with us by email.

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.