Obs-Snow Profile: Skyline 11/25/2011

Observer Name: 
Darce Trotter Steve Cote
Region: 
Skyline
Observation Date: 
11/25/2011
Location or Route: 
Big Meadow
Weather
Sky: 
Overcast
Wind Direction: 
Southwest
Weather Comments: 

On and off sunshine, warming temperatures, not alot of evidence the winds were really nuking through last storm with the expection of some small grauple mixed in new snow. 

Snow Characteristics

Snow Characteristic Comments: 
Today on the Big Meadow an open slope area South West from the miller flat parking lot. It was suprising to see the large surface hoar forming on the flats on the way up to the meadow already. The snow is rapidly losing what strengh it had from last week due to the thin snow pack and lack of new snow. The only sun crust we found was on the East slopes in the open aspen stands and this was variable. No evidence of wind loading from the last storm or wind slabs in this area.  The open slope we skied snow conditions were not constant, most of the slope would support a ski turn but other areas would not.  With no new snow in the next week the snow at the higher elevations (skyline ridge tops) and sheltered areas will continue to weaken, especially in the rocky and brush covered slopes.  This will be the problem areas when we do get more snow.    Steve Cote    

45 cm at Miller Flat snowstake, new snow is already weakening, recyrstalizing, does have some small graupel mixed in.  Older snow is supportable enough in places to support skier weight, but was highly variable, would change to tail punch, unsupportable on the same aspect.  do not think this was driven by elevation or aspect, but wind exposure, the more wind affected, the more supportable. 

Surface hoar very large in the more protected areas and the bottom of the drainages, was widespread in most areas with the expection of wind scoured areas and east facing slopes.  the eastern aspects are sun cooked with breakable crusts, turns would throw out dinner plates, crust 1"-3"  thick even down in aspens. 

overall, the snowpack is shallow enough that it is and will continue to weaken, not unlike the Central Wasatch in late October, early November.   We are a month behind the Wasatch and headed the same way now.  The stronger layer is just enough to cover the anchors and provide a sliding surface when the upper levels are loaded in the next storm cycle. 

Worse case scenerio, little storms that bury the weak layer without overloading it.  The snowmobiles are just starting to get out onto the snow, and are sticking to the northern aspect because that is where the snow is. 

We did note a little natural cornice activity along the northern end of Wedding Ring ridge, no other acitivity noted. 

Red Flags

Red Flag Comments: 

Weakening upper layers of shallow snow pack will become the main player as we go high and dry weatherwise this week. 

Primary Concern

Primary Concern Comments: 

The  NW through ENE summit ridges that are wind effected are one issue.  Hard slabs are still the order of the day and did have a old worn look to them, but cannot be trusted, more loading will only make them more unpredictable.  at best, they become the bed suface for the next loading event.

The more sheltered areas on the northern half of the compass now have a weaknening mix of recystalized snow and surface hoar that is delveoping a a rapid rate in the clear weather.  sun angles are not high enough to affect this layer, and we will be in for a cycle in the next significant storm.  

One last thing.  While not much of an issue right now, it should be mentioned that the down timber situation caused by snow/wind event last season is more than evident making route finding and egress a little more dangerous that just the shallow snow conditions.   later in the year, if you trigger something the takes you down into the timber you dont only have standing tress to dodge, but the deadfall is going to take a 5' plus snowpack to start to cover, and still be lurking just below the surface, so be aware. Darce Trotter

Elevation: 
9500'
Aspect: 
Northeast
Slope Angle: 
32
Slide1.JPG
snow_profile_location: 
United States
39° 34' 31.8972" N, 111° 16' 32.5596" W
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Comments - Photos - Videos (group 1)

surface hoar

November 25 2011 Big Meadow 003.jpg
Comments - Photos - Videos (group 2)

different layering on more easterly wind exposed aspect.  multiple wind layers sandwiched together form the stronger mid pack layer.

November 25 2011 Big Meadow 009.jpg
Comments - Photos - Videos (group 3)

overall look at snow cover in the area, looking down at Huntington Res.

November 25 2011 Big Meadow 011.jpg
Observed Danger Rating: 
Low
Forecast Danger Rating: 
Low
Snow Profile Location
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