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Avalanche Forecast

Archived

Mar 16th, 2016–Mar 17th, 2016

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

Regions

Jasper.

Good skiing  at Parker Ridge in sheltered locations

Weather Forecast

Cool temperatures with gust strong W ridge top winds into friday. Expect snowfall to spotty but may be intense for a short periods of time. Sunny breaks can be expected with freezing levels rising to 1200m on Friday and 1500m over the weekend. Cold overnight temperature over the next two days will maintain the supportive crusts at lower elevations.

Snowpack Summary

The snowpack is generally shallow and poorly consolidated, significant variation exists within the forecasting area. Test results in Portal Crk , 15th, showed mod-hard results dwn 60cm on facets 2-3mm with a sudden fracture character. This layer could be hard to trigger but could go big if it was. Windslab in the alpine and suncrust below Treeline.

Avalanche Summary

No new avalanches observed or reported.

Confidence

Forecast snowfall amounts are uncertain on Saturday

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.

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.