Avalanche Forecast
Issued: Jan 5th, 2018 5:25PM
The alpine rating is Storm Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Moderate - Due to the number of field observations
Weather Forecast
A couple of weak residual lows will bring patchy light precipitation to the South Coast Inland through the weekend.SATURDAY: Overcast, freezing level around 1000 m, strong west/southwest wind, 1 to 4 mm of precipitation expected.SUNDAY: High cloud, freezing level around 800 m, light south wind, trace of precipitation expected.MONDAY: High cloud, freezing level around 900 m, light south wind, 1 to 2 mm of precipitation expected.
Avalanche Summary
No new avalanche activity to report from Thursday. On Wednesday numerous loose avalanches to size 1.5 were observed from south aspects at all elevations. On Tuesday reported avalanche activity was limited to snow balling and pin wheels on north aspects.
Snowpack Summary
Warm temperatures likely produced a few millimeters of rain as high as 2000 m on Friday, this likely occurred throughout the region. Previous to Friday's rain event, warm alpine temperatures had allowed the upper 5 cm of the snowpack to become moist, even on upper elevation northeast facing features. As temperatures cool Friday night a crust is expected to form on the surface.On December 28th and 29th two successive storms produced 50 to 80 cm of snow. On December 29th and 30th strong to extreme winds out of the southwest, south and southeast created widespread wind effect. Time and warm temperatures allowed this snow to settle and bond well with the underlying surface. A widespread melt-freeze crust formed in mid-December may still be an issue in the northern portion of the region where it's down 50 to 100 cm below the surface, but is likely trending towards dormancy. Around the Coquihalla this interface is now thought to be part of a well bonded mid-pack. The lower snowpack is generally strong and well settled.
Problems
Storm Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 6th, 2018 2:00PM