Observation: Mill D North

Observation Date
12/24/2012
Observer Name
mark white - kobernik
Region
Salt Lake
Location Name or Route
Mill D, Little Water Peak
Weather
Sky
Obscured
Precipitation
Heavy Snowfall
Wind Direction
Northwest
Wind Speed
Moderate
Weather Comments
Light snow and fairly warm in the morning, frontal passage around 12:30 pm followed by heavy snowfall, dropping temps, and a bump in the wind speeds.
Snow Characteristics
New Snow Depth
15"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
Started at spruces campground with about 4" of low density snow on the ground, once the front came through it started snowing heavily my guess is about 3" an hour of right side up low density snow. By the time of departure about 4 pm there was about 15" inches of new snow on the ground.
Red Flags
Red Flags
Heavy Snowfall
Comments

Headed up Mill D today trying to find some low angle turns and avoid bottom feeding on the old wind hammered bed surface. Plan seemed to work well until it became to deep to ski the low angle, about 2 pm. Continued up to Little Water Peak, probably at the same time as new snow instabilities were spiking. New snow was quite sensitive on steeper slopes. Long running sluffs were the theme in the steeper N facing terrain, new snow only. Little water Peak had already had some evidence of new snow instability when we arrived in the form of natural sluffs that had run to the flats. Just by kicking a little snow down the slope new snow sluffs could be initiated and run to the flats in steeper terrain. pics Skier initiated sluffs on Little Water Peak.

FORECASTER NOTE: I'd concur with Mark since I spent the day skiing with him. We were probably close to the height of the new snow instability at around 3:30pm on Little Water Peak. It was behaving in fairly typical fashion for high snowfall rates. Manageable. Just don't stand below more sustained avalanche paths. It will not behave the same on Christmas Day. The new snow sensitivity will be much less. We noted just a little wind affect that should be considered when venturing out tomorrow.

Only insabilities noted today were sluffing of the new snow and some minor cracking on the ridge-lines. No collapses or stepping down into old snow were noted. Sorry about the quality of the photos it was full on puking snow after the front. Pic heavy snowfall after frontal passage.