The USDA Forest Service avalanche centers are continuing to operate despite the partial government shutdown because of the critical public safety information they provide.
Week in Review for 3/17/2018 - 3/23/2018
Submitted by andy on Mon, 03/19/2018 - 14:25
Dates of the Week:
3/17/2018 to 3/23/2018
- Wind Slabs - Reported avalanches - Numerous natural and human triggered on March 17. Widespread natural cycle during the storm March 21 -23
- Storm Slabs - Reported avalanches - Numerous natural and human triggered on March 16 - Numerous natural storm slabs March 21 -23
- Deep Slabs - Reported avalanches - 2 Human triggered, 2 natural March 17 - Widespread natural deep slab cycle March 21-23
- Loose Wet - Reported avalanches - Natural loose wet that covered Emerald Bay Rd. on March 21.
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.
- 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.