Week in Review for 3/31/2018 - 4/6/2018

Dates of the Week: 
3/31/2018 to 4/6/2018
Avalanche Problems: 
  • Loose wet - (0 natural, 1 skier triggered reported)
  • Deep slab problem for rain on snow event late March 6 into March 7.
General Snowpack Structure: 
  • Increasingly well established melt-freeze conditions. Snowpack ripeness varies by aspect and elevation. In general, the snowpack is at or near full ripeness on all aspects below 7,000'. Up to about 8,000' E-SE-S-SE-W aspects are at or near full ripeness. NW-N-NE aspects 7,000' - 8,000' are still mostly snow colder than 0 deg C with a snowpack depth of 1.7 to 4+ meters. All aspects above 8,000' have varying degrees of ripening with a very wide spread. For example, one NE aspect observed on March 3 at 9,500' only had wet snow in the top 5 to 10 cm of the snowpack. The rest of the snowpack on that slope was several meters deep and had yet to enter melt phase.
  • Remains of February facet layer now mostly rounded but still a sigtnificant density change within the lower snowpack. Tests indicate layer is still likely to propagate if failure can be initiated.
Weather Events: 
  • High pressure early in the week
  • Cloud cover and some areas of poor overnight snow surface refreeze mid week, especially in the northern half of the forecast area and below 8,000'.
  • Atmospheric River event with snow level to 11,000'+ started the night of March 5 and continued through March 7.

December Donor Drive

Winter is back and so is SAC! Everything we do hinges on the generous support of users like you.

Please help support SAC with a tax-deductible donation today!


No Thanks