Observation: Silver Fork

Observation Date
2/21/2015
Observer Name
Greg Gagne
Region
Salt Lake » Big Cottonwood Canyon » Silver Fork
Location Name or Route
East and West Bowls of Silver Fork
Weather
Sky
Overcast
Wind Direction
Northwest
Wind Speed
Calm
Weather Comments
Temps hovered about -5 C. Only note of wind was atop Davenport Hill. Sun poked out every now and then.
Snow Characteristics
New Snow Depth
12"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments

I was finding 25-30 cms (10-12") of soul restoring fresh snow in upper reaches of Silver Fork. The 10 cms (3-4") that fell during the day on Friday was somewhat dense and provided a nice base for the lighter density snow that fell overnight. No wind drifting noted at all. Did notice several natural sluffs that likely ran in the early morning when snowfall rates likely spiked for a shot period. New snow was not slabby or cohesive, and bonded well to old snow surface.

Snow Profile
Aspect
North
Elevation
10,000'
Comments

We needed this. Storm snow was well-behaved and I only noticed several small natural sluffs that ran within the storm snow. On steeper aspects I was able to ski cuts sluffs as well, but very manageable. Prior to the Friday snow the existing snowpack was about as bombproof as it gets, with several people finding some faceted snow at the old snow surface in upper north-facing elevations. Outside of these upper elevation aspects, I was finding the storm snow to have bonded quite well to the old snow surface. On upper elevation north aspects it was quite easy to dig down to the old snow surface where you could find the faceted snow. However, the grains were moderately-sized and somewhat dense. Stability tests were showing clean, moderate to hard shears (STM/STH). Going forward it is useful to know that this weak layer has been preserved, but it was not active from today's storm and I suspect it will gain strength over time.

Overall mostly Low danger with easily provoked small Class 1 sluffs in steeper terrain. The sun had not come out for any extended period, but when it does (unfortunately) reappear the light density snow will quickly become active on solar aspects.

Easily best ski conditions since Solstice/Christmas storms.

Photo of natural sluffs in steeper terrain.

The Wasatch looked beautiful this morning with a fresh coat of white! Soul restoring.

Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low