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Avalanche Forecast

Archived

Apr 6th, 2022–Apr 7th, 2022

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

Regions

Glacier.

Intense sun and high freezing levels will rise hazard levels on Thursday.  Plan to travel early in the day on all solar facing terrain. Watch for loose, wet snow below treeline on all aspects.

Weather Forecast

A ridge will bring warm air and higher freezing levels,3000m Thurs, with a storm coming on Fri.

Tonight: Clear, Alp low -5*C, FZL 1100m, Light SW winds

Thurs: Cloudy with sunny periods, Alp high +2*C, FZL 2900m, Mod SW winds

Fri: Flurries, 10 cm, Alp high 1*C, FZL 2600m, mod SW winds

Sat: Sun/Cloud/Flurries, Tr, Alp high -5*C, FZL 2100m, light W winds

Snowpack Summary

Surface crust on all aspects to 1700 m, into the alpine on solar aspects.  A series of late March/early April crusts are buried down below 30-80 cm of storm snow.  This mostly fell as rain below treeline.

Northerly alpine slopes hold cold, wintery snow. The December 1st crust is down 1.5-2m. Large cornices are present through out the parks.

Avalanche Summary

Wednesday:

Explosive testing at treeline on north and east aspects triggered two size 1.0 avalanches, failing down 15 cm below a soft slab.

A natural glide slab avalanche sz 3.0 was observed west of the rogers pass summit.

On Tuesday a team in the west end of the park easily ski cut a sz 2.5 persistent slab, 70cm deep, 50m wide, NE asp, at 2150m.

Confidence

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.