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Avalanche Forecast

Archived

Mar 26th, 2022–Mar 27th, 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.

New snow / rain, rising freezing levels and loading winds will gradually increase the hazard over the day on Sunday.

Dry power snow found on polar aspects at higher elevations.

Weather Forecast

Sunday, a low pressure system brings 5-15cm of snow, 20-50km/hr South West winds and a freezing level up to 2500m (rain at lower elevations) during the overnight period into Monday. Another 10cm on Monday with slightly lower freezing level. A ridge of high pressure arrives on Tuesday bringing sunny skies and seasonal diurnal temperature swings.

Snowpack Summary

A crust exists up to 2200m on all aspects (which breaks down with daytime warming) and extends into the alpine on solar aspects. Pockets of wind slab in the alpine and down into tree line. The March 11th crust is buried 40-70cm. Cold, dry powder snow can be found on sheltered, polar aspects at higher elevations.

Avalanche Summary

Several loose wet avalanches up to size 2-3 released on Thursday and into Friday after the rain event up to 2200m. The most notable was Park One Minor, which filled the creek, jumped the bank and buried both lanes of the TCH a meter deep by 20m wide.

Glide cracks are on the move, show them respect during the rain and warming temps.

Confidence

Forecast snowfall amounts are uncertain on Sunday

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.

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.