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Avalanche Forecast

Archived

Dec 10th, 2012–Dec 11th, 2012

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

Regions

Glacier.

Conditions have changed from the past few days with moderate winds and new snow, choose your terrain accordingly.

Weather Forecast

2 systems cross the region over the next 2 days . An upper trough today brings milder temps and drops in wind at lower elevations. Mountain top winds to remain NW 60 to 80km/h. The second system arrives Wednesday bringing light precipitation.

Snowpack Summary

Lower density snow in the upper 30 to 45cm. This overlies a well settled mid pack. The Nov 6 Cr is down approx. 150cm. Mixed forms sz 1.0 were observed above the crust. Profile below Asulkan Hut, 1990m, W asp, 43deg, HS 185cm CTM (PC) down 25cm on df 2.0, DTH (B) down 150cm on mx 1.5 (nov 6 cr)

Avalanche Summary

5 Natural size 2.0 loose avalanches were observed yesterday morning in the north acing gullies of Mt Macdonald.

Confidence

Intensity of incoming weather systems is uncertain on Tuesday

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 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.