Naturally triggered avalanche occurring likely Wednesday evening, January 9 or possibly January 10. Looking up the gully, start zone obscured by blowing snow. Debris heavily wind affected. It appears that the avalanche ran from above the Christmas . . .
Signs of widespread avalanche activity some of which was large, following snow and wind during the past few days. Observed wind scoured debris in the following locations:
Lobster Claw – D2
Floor (from Headwall) D4
Left Gully D2
Empress . . .
4000” due east aspect, test slope next to the patrol shack. I ski cut the slope with shooting cracks and a big slump. The stanch wall broke and developed. But the slope stop before it enter gliding motion.
Surface of the snowpack consists of old melt-freeze crusts, older wind slab and wind slab that formed yesterday from 5″ of snow combined with high wind.
Naturally triggered avalanche, suspected occurrence late Sunday 1/6 or early today. Crown partially refilled by wind loaded snow, debris heavily wind affected. As seen in the picture, a line just below the ice and above the prominent crown line may . . .
Varying hardness (1F-4F) new wind slab, relatively smooth and consistent except in upper portions of terrain where scouring occurred. With incoming snow and wind, it’s worth noting this widespread smooth and firm nature as a potential avalanche bed . . .
While east facing ravines hold large areas of recently wind loaded snow, upper elevations on the west side of the Presidential range seem largely scoured to a crust. In many areas, that crust is the 12/22 rain crust that is nearly impenetrable with a . . .
Variable upper snowpack- Pockets and larger areas, particularly in Central, Pinnacle, and especially Odell, of recently formed wind with significant areas scoured to hard, supportable crust.
Wind slab was touchy though thin and small in observed . . .
On touring into Tuckerman today, we noted the following activity:
SS-N-R1-D1.5 in Center Bowl of Tuckerman. This likely occurred 1/3/18. We think so by the amount or reloading that took place. This may have been triggered by very small dry-loose . . .
We observed debris in the far looker’s left runout of Left Gully.
Loose snow avalanche, naturally occurring (probably this morning), very small relative to path (though just a guess as visibility was very poor and we could only see 200 . . .