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RegisterNov 30th, 2019–Dec 1st, 2019
South Columbia.
Soak up the sunshine, take stock of early season snowpack variability, and monitor for lingering pockets of wind slab in the alpine.
Share what you see in the mountains this weekend via the MIN!
Saturday night: Mostly clear, alpine temperature -12 C, light southwest wind, no precipitation.
Sunday: Increasing cloud cover, alpine temperature -7 C, light southwest wind, isolated flurries with a trace of accumulation.
Monday: Mostly cloudy, alpine temperature -6 C, light southwest wind, light snow possible with 2-5 cm of accumulation.
Tuesday: Mostly cloudy, alpine temperature -6 C, moderate southwest wind, light snow possible with 2-5 cm of accumulation.
Avalanches are decreasing in likelihood, but it still may be possible to trigger wind slabs in isolated pockets in the alpine. This is a great MIN report from the South Columbia region on Wednesday that helps to paint the picture of these wind slab avalanches.
If you see anything while out in the field, please consider sharing that information with us and the backcountry community via the Mountain Information Network.
Snow line sits around 1200 m, and snow depths range from 60-110 cm at treeline elevations.
A week of cold temperatures has been decreasing the strength of the upper snowpack, except in isolated areas where it has been drifted into wind slabs in the alpine. These slabs could be more reactive where they overly a weak layer of surface hoar (feathery crystals) that formed on a crust.
A variety of crusts from late October are buried deeper in the snowpack (down 40 to 80 cm). Generally, the inactive weather pattern over the past week has improved snowpack stability in the short term.