Week in Review for 3/17/2018 - 3/23/2018

Dates of the Week: 
3/17/2018 to 3/23/2018
Avalanche Problems: 
General Snowpack Structure: 
  • Rain and heavy load reactive graupel/crust weak layer and possibly older weak layers. Post March 21 - 23 storm deep weak layers seem to become dormant.
  • Upper snowpack mix of dense and lighter snow and consolidates rapidly after March 21 -23 storm.
  • Strong winds leave hard wind slabs and firm wind-packed surfaces near and above treeline.
Weather Events: 
  • Convective storms on March 17.
  • Warming and clearing March 18 - 20
  • Atmospheric river March 21 - 23 with 4.5 to 9 inches of water. Snow level 8000 ft. or higher for much of the storm but dropped to 6700 by the end.  3 to 4 ft of new snow above 8000 ft. and 2 ft. above 7000 ft. Strong winds during the storm.