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Avalanche Forecast

Archived

Mar 22nd, 2021–Mar 23rd, 2021

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

Regions

Glacier.

Although Spring has sprung, expect a wintery snowpack up high!

Re-evaluate hazard as you change aspect and elevation.

Weather Forecast

A broad upper trough over the province means unsettled conditions today.

Today: Flurries, 6cm. Fzl 1300m. Wind NW 15-30 km/h

Tonight: Cloudy with clear periods. No precip. Fzl lowering to valley bottom. Wind N 15-25 km/h

Tuesday: Cloudy with sunny periods and isolated flurries. Fzl 1200m. Wind SW 25-35 km/h

Snowpack Summary

30-45 cm of new snow is covering a melt-freeze crust on solar aspects, surface hoar on dry settled snow on polar aspects, and a moist upper snowpack at lower elevations. Cornices are large and fragile, be sure to maintain good travel habits and give them a wide berth.

Avalanche Summary

The infrasound avalanche detection system has signalled a couple of avalanches this morning from steep north aspects in the highway corridor. On Saturday, a few large slab avalanches occurred from the steep north paths off Mt. Macdonald and the glide crack on lower Avalanche Crest 4 also released.

Confidence

Intensity of incoming weather systems is uncertain

Problems

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.