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Avalanche Forecast

Archived

Mar 1st, 2014–Mar 2nd, 2014

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

Regions

Jasper.

Bundle up and stay warm out there!

Weather Forecast

Cold temperatures and a steady north wind making it difficult to enjoy the fantastic sunny weather. Light snow is forecasted for late Sunday afternoon and continue through the week. No reprieve from the cold for Sunday with a forecasted high of -23 degrees but the moderate winds should die down as the flow shifts slowly from north to the south.

Snowpack Summary

The snowpack is well settled with a supportive mid-pack above 1,900m. Above this elevation a concerning weakness can be found consisting of decomposing surface hoar and or facetted grains. This may be found 30-70cm down. Moderate winds have stiffened the surface snow in open areas above tree line. Solar aspects below 1,900m will have a sun crust.

Avalanche Summary

No new avalanches have been reported. Some previous natural avalanches have been observed in solar aspects below tree line and in cross-loaded lee features.

Confidence

Forecast snowfall amounts are uncertain on Monday

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.