Avalanche Forecast
Regions: South Rockies.
Confidence
Low - Due to the number of field observations
Weather Forecast
Harmer (1870m):Temps between 2 and 4.5C over last 24 hours. HS decreased from 57 to 43cm. Winds 30-45 SE (prev SW)Crowsnest Ck (1450m):H96W: 18mm; H24W: 12mm; TMax 9; TMin 4S Racehorse Ck(1950m): H96W: 52mm; H24W: 32mm; TMax 7; TMin 3Castle Mtn (1420m): H24W: 14.4mm rain; H48W: 40mm rain. TMin 6; TMax 8; Mod SW winds
Avalanche Summary
There are few observers right now, but avalanches almost certainly ran during the onset of the rain on Wednesday. I suspect this activity will taper off with cooling temperatures on Friday and Saturday.
Snowpack Summary
Rain and warm weather have resulted in a widespread wet upper snowpack. The freezing level rose to approximately 2700 m on Wednesday and Thursday meaning very few places, if any, will have escaped the melt. The last 48 hours have seen the snowpack diminish by approximately 10 cm. Expect treeline snow depths of around 45 cm in the Elk Valley and more like 80 cm further south in the Flathead in sheltered areas. A crust that formed around Halloween has been reported within the snowpack that may lie around 40 cm below the surface.
Avalanche Problems
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Unlikely - Possible
Expected Size: 1 - 3
Loose Wet
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Possible
Expected Size: 1 - 2