Avalanche Forecast

Issued: Nov 19th, 2011 8:50AM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is low. Known problems include Wind Slabs.

mpeter, Avalanche Canada

Kootenay Boundary.

This bulletin is based on limited data. Local variation in conditions and danger levels are likely to exist. To produce more accurate forecasts, we need information. Please send an email to forecaster@avalanche.ca.

Summary

Confidence

Poor - Due to limited field observations

Weather Forecast

Sunday: Expect clouds to build and winds to shift to southwesterly. Temperatures will remain cool. Flurries could begin in the evening. Monday & Tuesday: Periods of snow, especially the west side of the region. Winds will stay southwesterly and increase significantly as the storm intensifies. Expect freezing levels to reach 1500m on Tuesday.

Avalanche Summary

Observations are extremely limited at this time. No new avalanches have been reported.

Snowpack Summary

10-30cm of new snow has fallen in the last 48hrs, with significantly more at the south end of the region. Snowpack depths are likely in the 60-80cm range at about 1600m and about 125cms at 2000m. In the upper snowpack, windslab and storm snow instabilities exist around lee features and ridgelines. Watch for the possibility of reverse loading with the recent Easterly winds.

Problems

Wind Slabs

Variable winds have created the potential for windslabs on all aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Nov 20th, 2011 8:00AM