Observation: Skyline 1/6/2012

Observer Name: 
Darce Trotter Steve Cote
Region: 
Skyline
Observation Date: 
01/06/2012
Location or Route: 
Electric Lake Ridge, Bolger Canyon
Weather
Sky: 
Clear
Wind Direction: 
North
Wind Speed: 
Light
Weather Comments: 

 Temperature inversion apparent as we climbed out of or descended into drainages. 

Significant wind event last Friday has blown windward summit ridgelines to the dirt, again, reaching into lower slopes with variable redistribution, even within short distances

Snow Characteristics

Snow Characteristic Comments: 

 How do you what it?  facets on facets? suncrusts on facets? windcrusts to shallow windslab on facets? hard slabs on facets? dirt on facets? no snow at all, just dirt? All are readily available and convieniently located with an arms reach.  

Last "snowstorm (Friday last week) left a veneer of graupel that would like to join the facets, but so far just rolls around on the surface.

the good news:We found good skiing in the north facing sheltered areas in 14"-18" of "loud powda" , get around to the west too far, suncrust appears, worsening the more south, or west, or even east you get.  In more open areas wind crust quickly thickens to get more interesting, but, again, anywhere other than the most sheltered areas, things change quickly and you have to be on your toes.  All that being said, Steve and I had a great ski day by sticking to lower angle north facing terrain, including some glade skiing in a new area Steve has been thinking about.

Bad news: amazingly so, the pack is not getting any stronger other than surface windcrusts/slabs, and uphill skin tracks continue to be a wallorama, and stumps, logs, rocks, and other vermin try to ruin your ski season.

Snow has also melted out of big firs and when trees get dense, you quickly find yourself in breakable MF crust from dripping water , but in gladed areas, we could not help but smile! 

Natural cycle occurred during the last wind event and summit ridges were littered with evidence of propagating wind slabs (some over a 1000') from cornice falls, especially east facing summit ridge lines like wedding ring. 

Steve noticed a new slab that had pulled out from cornice fall/heating, since Wednesday, so thinks are still dicey in the usual suspect areas.  

Red Flags

Recent Avalanches
Wind Loading
Cracking
Rapid Warming
Red Flag Comments: 

 Obvious weak snow pack, recent wind loading event, persistent weak layers, slabs have been sitting for a while now and will be even trickier to assess.  Hard slabs could lure you way out, then break above you or propagate long distances. 

Primary Concern

Primary Concern: 
Persistent Slabs
Probability: 
Considerable
Aspect: 
Northeast
East
Elevation: 
High
Trend: 
Same
Primary Concern Comments: 

 The dragons are still out there, but easily to localize. Exposed, wind loaded leeward slopes NE through NW.  I wonder sometimes what would compel someone to even get into these areas when any approach, or even chance of good conditions would discourage anyone.  The areas that are sensitive off the summit ridgelines are dirt on the windward side, and things just are not that inviting.

Lower drainages do have loading in unusual places, certainly in pockets that are apparent, (they are the "white places")

 

Secondary Concern

Probability: 
Considerable
Aspect: 
North
Northeast
Northwest
Elevation: 
Mid
Trend: 
Same
Secondary Concern Comments: 

 Sugar-lanches are still easy to get started and with the shallow snowpack, widespread down timber from last year, and nasty terrain traps, you could easily get hurt or even killed if you get knocked down and go for a ride

 

 

snow_profile_location: 
United States
39° 38' 3.7752" N, 111° 15' 36.324" W
Comments - Photos - Videos (group 1)

 smooth approach

December 16 Electric Lake 004.jpg
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Comments - Photos - Videos (group 2)

 natural activity on Wedding Ring Ridge, over 1000' long

December 16 Electric Lake 018.jpg
Comments - Photos - Videos (group 3)

 New activity since Wednesday, east facing, just west of snow kite area on summit ridge

December 16 Electric Lake 020.jpg
Comments - Photos - Videos (group 4)

 right off highway, ran during last storm

December 16 Electric Lake 021.jpg
Observed Danger Rating: 
Considerable
Forecast Danger Rating: 
Considerable
Snow Profile Location
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