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Avalanche Forecast

Archived

Feb 12th, 2013–Feb 13th, 2013

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

Weather Forecast

Light snow and strong westerly winds are forecasted for Tuesday night. On Wednesday the airmass will cool and the winds will shift to north-west. Little in the way of new snow is forecasted for the end of the week. 

Snowpack Summary

If forecasted strong westerly winds on Tuesday night arrive, fresh windslabs will be created in alpine lee terrain. Where shallow the mid-pack is weak and facetted. In deeper snow country west of the divide the mid-pack remains strong. Pit at 2200 m in Kootenay Park showed Jan 6 surface hoar down 55 cm and is non reactive with compression tests.

Avalanche Summary

No recent avalanches observed or reported.

Confidence

Wind speed and direction is uncertain on Wednesday

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.