All are estimates. Natural cornice failure due to strong winds seems most likely. Did not access crowns due to overhead hazard.

Strong southwest winds on Tuesday Jan 14th likely provoked a large natural cornice fall which in turn triggered a size 2 wind slab that in turn stepped down to near the ground. Arrows point toward grass/shrubs pushing through old snow near the ground. Repeater. Original avalanche during the Thanksgiving Cycle - Thursday - Thanksgiving, November 28, 2019 - as remotely triggered/reported by Mark White. Based on amount of snow on the bed surface, the avalanche likely ran during frontal passage just after noon.

Had been concerned - with the 60-100" (3.5-6.3" SWE) since New Years along with the strong SW winds that some repeaters might come back to life. I suspect that there may be a few more out there. Seems like the major window was yesterday/Tuesday and perhaps tomorrow/Thursday with the strong winds...and then may prove more stubborn in the days ahead.

Forecaster Comments: Thanks to all that submitted info regarding this avalanche; we could save only one observation for our record keeping.