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Avalanche Forecast

Archived

Jan 27th, 2021–Jan 28th, 2021

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Light flurries and SW winds forecast for the region. Generally trace amounts of new precip which is not expected to overload the existing snowpack.

Weather Forecast

Wednesday morning, expect sunny periods and isolated flurries in the afternoon with only a trace, up to ~4cm of new snow. Alpine temperatures: Low -15 C, High -8 C.

Snowpack Summary

Surface faceting continues with cooler temperatures. Previous winds have stripped snow from all exposed terrain creating hard wind slabs and wind affected snow in any open terrain. The mid-pack is supportive. Decomposing surface hoar is found down 40cm to 80cm in isolated sheltered locations.

Avalanche Summary

Field team reports no new avalanche activity observed.

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Confidence

Problems

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.