Northern San Juan
AvalancheAnonymous · Feb 14, 2021 · Northern San Juan
Weather
Partly Cloudy, Light Wind, Southeast Aspect. The slide occurred on a northeast aspect.
Snowpack
The snowpack in the zone in which the avalanche occurred saw an excessive amount of wind-loading on top of multiple faceted weak layers. 12800 elevation. Slide occurred on North through northeast aspects.
Avalanche
The avalanche occurred on north through northeast aspects at an elevation of 12800ft to 13200ft. It broke to ground in multiple regions of the slide and the depth of the crown exceeded 20ft at its peak. It released monolithic truck sized slabs in the terrain features which had the greatest loading capability/capacity. As a great majority of the possible slide path was at play I would consider this slide to have run at R4, D4, as was evidenced by its magnitude, and debris pile, which we estimated to have been at least 30 ft deep.