Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
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.
The winter permit system is NOT yet in effect but is scheduled to come into effect on Friday November 23. Click here for information on how to obtain annual and daily winter permits.
Weather Forecast
Southwesterly flow will continue to bring precipitation to the interior through Wednesday. Up to 35mm is possible. Freezing levels will be near 1500m and strong SW wind is forecast.
Snowpack Summary
10 of new snow. November crust layers are buried about 60 to 70 cm in sheltered areas. Extreme southerly winds early Sunday produced windslabs on northerly aspects in the alpine and treeline.
Avalanche Summary
Several natural avalanches were observed yesterday. These occurred in steep north facing alpine terrain and ran to about one-half fan.
Confidence
Timing, track, or intensity of incoming weather system is uncertain
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.
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.