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Avalanche Forecast

Archived

Feb 2nd, 2017–Feb 3rd, 2017

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

Regions

Lizard-Flathead.

The best and safest riding may be in sheltered terrain around tree line

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain on Saturday

Weather Forecast

Friday: Flurries, accumulation 5-10cm / Light east wind / Alpine temperature -4Saturday: Periods of snow, accumulation 10-15cm / Light southwest wind / Alpine temperature -3Sunday: Periods of snow, accumulation 10-15cm / Light to moderate southwest wind / Alpine temperature -2More details can be found on the Mountain Weather Forecast.

Avalanche Summary

There is no recent avalanche activity to report from the last few days.

Snowpack Summary

In general, snow surfaces are best described as heavily wind affected with scouring and sastrugi formation noted on many terrain features tree line and above. Crusts can be found near the surface on solar aspects at high elevations and on all aspects below 1600m. There have been isolated reports of a surface hoar layer from early January buried about 40 cm deep in sheltered areas, although not much is known about its current reactivity. About 70cm below the surface, you'll find sugary facet crystals which formed during December's cold snap. Although avalanches are currently unexpected at this interface, this layer could come back to life with with warming, significant loading or a large trigger at a thin spot.

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.