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Avalanche Forecast

Archived

Mar 1st, 2021–Mar 2nd, 2021

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

Glacier.

Windy day ahead!

Keep a close eye on snow transport today and assess for building wind slabs as the day progresses. 

Weather Forecast

A cold front across central BC will gradually move southward today

Today: Mainly cloudy with a trace of snow. Freezing level 1400m. Wind SW 30 km/h gusting to 90!

Tonight: Cloudy with scattered flurries. Accumulation: 5 cm. Freezing level: 900m. Wind SW 30 km/h gusting to 85.

Tuesday:  Cloudy with sunny periods and a trace of snow. Wind SW 20-30 km/h.

Snowpack Summary

More snow has fallen on the west end of the park than east. Since Wednesday, up to 70cm has been redistributed by sustained moderate S'ly wind. The Feb 14 drought interface is down ~1m in sheltered areas; this interface exists as a wind crust in exposed areas near the Pass, and buried windslabs, facets, or a thin suncrust as you move East or West.

Avalanche Summary

Yesterday, one notable size 2.5 avalanche was observed that occurred from a steep solar feature in the alpine. Saturday, several solar induced natural avalanches occurred from steep south aspects in the alpine to size 2.5, as well as a smaller wind-induced cycle from steep northerly aspects to size 2.0.

Confidence

Intensity of incoming weather systems is uncertain

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.