Summary
Confidence
Fair - Freezing levels are uncertain on Monday
Weather Forecast
Saturday: Mix of sun and clouds with possible flurries. Light north winds. Freezing level 1600m.Sunday: Mostly clear and sunny. Light to moderate northwest winds. Freezing level 1500m.Monday: Mix of sun and cloud. Light southwest winds. Freezing level 2000m with a possible temperature inversion.
Avalanche Summary
On Wednesday natural avalanches ran to size 2.5 on north and east facing features around 2500m. One of these events was initiated by cornice fall.In two separate incidents Tuesday, natural cornice fall on 38 - 40 (degree), NE facing features around 2400m, initiated size 3 avalanches that failed on the mid-February crust/facet/surface hoar combo with crowns up to 120cm in depth. A natural avalanche with a 45cm crown on a NE facing feature at 2500m was also reported.
Snowpack Summary
15 - 25cm of snow has fallen over the past 2 days.Warm temperatures resulted in the freezing level rising to almost 2000m Sunday/Monday. This has helped to settle out last weeks storm snow at and below treeline, but winter conditions prevail at upper elevations. Strong winds out of both the SW and NW have recently distributed dry snow in the alpine into wind slabs that remain sensitive to human triggering.Three persistent weak layers exist in the highly variable snowpack of the Cariboos:The mid-March sun crust/surface hoar layer down 50-80cm still has potential for human-triggering in isolated areas. The early-March crust/facet/surface hoar layer down around 80-120cm has become less susceptible to human triggering, but still has the capacity to produce large avalanches.The mid-February crust/facet/surface hoar combo is typically down 150 - 200cm. Direct triggering of this layer has become unlikely, however, cornice fall, a smaller avalanche in motion or prolonged warming may wake this layer up, which would result in very large and destructive avalanches.
mbender,
Avalanche Canada
