The avalanche was observed on a WNW face just north of Senate Peak most likely occurring early morning 2/4. Appears to have started near the ridge, possibly from cornice fall, and then broken deeper along the length of the center gully. From Mushroom Ridge it was hard to tell how deep the slab broke but it propagated down the length of gully more than 1000ft.
Signs of Unstable Snow
Observed a natural avalanche in the Senate Peak area that appears to have failed from a cornice fall near the ridgeline then propagated down the gully. I would guess it failed early morning 2/4 due to the definition of the crown. The picture was taken with a cell phone from Mushroom Ridge.