Avalanche Forecast

Moderate - Intensity of incoming weather systems is uncertain on Wednesday

On Wednesday expect 5-10cm of new snow with strong southwest ridgetop winds while continued light snowfall (5-8cm) and decreased winds are forecast for Thursday. Clearing skies are forecast for Friday as a dry ridge of high pressure develops over the province. Freezing levels should hover between 1100 and 1200m for the forecast period.

In recent days a natural cornice fall triggered a size 3 slab avalanche in the southwest corner of the region. The avalanche occurred on an east aspect in high alpine terrain and stepped down to a few persistent weak layers from January and December. This avalanche demonstrates how a cornice fall can trigger layers that may otherwise be difficult to trigger.  On Monday loose wet avalanches to size 2 were reported to have occurred in steep terrain on a variety of aspects. They failed in response to periods of solar warming or rain. New wind slab activity is expected in response to new snow and strong winds on Wednesday.

In some areas, a dusting of new snow overlies wind slabs in exposed high elevation terrain and settled dry (and faceting) powder on shaded and sheltered slopes. Spring conditions have continued to develop. With that, lower elevation and sun-exposed slopes will likely appear moist or refrozen. A layer of surface hoar from early March can be found down 50-70cm but only seems to be a problem for the northern half of the region. Professional operators are still tracking two deep weak layers from early-January and early-February which can be found down about 1m or more. These layers have been dormant for a couple weeks but could wake up with substantial warming or a heavy trigger (like a cornice fall). Basal facets exist in most areas and have recently become reactive in the north of the region