Purcells

Fair - Forecast snowfall amounts are uncertain

Overnight and Sunday: Flurries with trace amounts of precipitation, winds from the west at ridgetop 30 to 60 km/h, freezing level at valley bottom.Monday: Flurries with trace amounts of precipitation, strong winds from the W-NW at ridgetop  gusting to 100 km/h, freezing level  rising to 1200 M.Tuesday: No Precipitation in the forecast, moderate to strong winds from the west, freezing levels may rise to 1500m in parts of the forecast area

There have been a few different close calls with large avalanches in the north of this region in the last three weeks. Check out the incident database for more details. Reports from the last 4 days indicate several natural cornice triggered avalanches running to size 3 on east and southeast aspects at treeline and above.

Up to 20 cm of new snow sits on a variety of snow surfaces ranging from stiff wind slab, a soft layer of facetted snow and/or surface hoar. These sit on top of old wind slabs and a couple of persistent weak layers that exist in the upper meter of the relatively thin snowpack. The mid December surface hoar is buried around 30-90 cm. The early December facet/crust combo is buried down 50-150 cm. Both interfaces give variable results with snowpack tests, but professional operators are treating them with caution.A bigger concern, especially in the Northern part of the region is a layer of weak sugary depth hoar crystals at the base of the snowpack that lie above a crust from early October. Several large avalanches in the last two weeks have been attributed to failures at this layer. Wide propagations on relatively gentle terrain have been noted, as well as a tendency for seemingly disconnected slopes to become connected by one large avalanche.