Northern Gallatin

An image of the 4 crown and location of debris.

This crown was the one to the furthest looker's left of the bowl. Photo: GNFAC

These trees were bent over from repeated avalanches in this bowl. Photo: GNFAC

The deepest part of the crown was estimated to be 10-12' deep. It was a steep and heavily wind-loaded with a rocky starting zone.  Photo: GNFAC

The avalanche was powerful and put debris far down the slope along the flat bench. Photo: GNFAC

These 4 avalanches seem to have run at the same time (estimated 15 or 16 February) although the crown does not connect them, but the weak layer of depth hoar surely does. Slides 1 and 2 merged into the huge debris field. Photo: GNFAC

The end of the runout is marked with the arrow. Photo: GNFAC

I measured the Alpha Angle (angle from crown to toe of debris) at 16 degrees. This is a very low angle that signifies the avalanche ran about as far as it ever could based on the size of the path. I took 5 measurements using 2 inclinometers to make sure this was correct. Photo: GNFAC

The uphill branches on this stand of trees was freshly limbed up to 15' high. Photo: GNFAC