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Avalanche Forecast

Archived

Feb 9th, 2020–Feb 10th, 2020

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

Regions

Glacier.

Moderate winds have switched from northerly to south in some areas of the park.

Be cognizant of fresh windslabs and the effects of reverse loading.

Weather Forecast

Stagnant pattern continues today as an upper ridge anchors itself offshore

Cloudy with sunny periods and isolated flurries today with moderate W winds. Daytime high -10C at treeline.

Cloudy with clear periods tonight. Treeline temps -12C, gusty NW winds to 45km/h.

Monday will be a mix of sun, cloud, and flurries with light S winds. Treeline temps -9C.

Snowpack Summary

Moderate winds switching from north to south overnight have redistributed this week's 35+cm of low density snowfall. A thin suncrust exists down 10cm on steep solar aspects. Below 1800m, a melt-freeze up to 10cm thick is covered by 20-30cm.

Avalanche Summary

Yesterday, numerous loose dry avalanches to size 1.5 were observed from steep features on all aspects. One large (size 2.0) slab avalanche from Cheops 2 was also observed.

On Thursday, a cornice fall triggered a large slab avalanche (size 2.5) on the north face of Cheops.

Confidence

Problems

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.

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.