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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.25.18 Name: Wieland Operation: SAC
 Drainage/Route:  Salmon River headwaters Observed Terrain:  7300-9200' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 12cm HST: 12cm Sky: BKN Precip: Temps:
 Ridgeline Wind: Moderate from the W
 Blowing Snow: Snow Available for Transport:
 Comments: S3 driving over pass in AM with S-1 on Salmon river side. Snow subsided in afternoon with skies become few around 1330 near Smiley creek but more obscured further north. Small squalls moving back through around 1530 as noted in other ob.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 10,255 Bowl Today 1 SS N NE 9500 just saw debris. likely small windslab.
 1 Headwaters Older than a week 1 SE 8000 older persistent slab that i dont' think has been reported. More recent than 1/11 cycle. Might have been triggered from nearby as sled tracks are visible close to slide.
 Comments: Did not see any other activity glassing the immediate Salmon river headwaters area.
SNOWPACK OBSERVATIONS
 HS: 100-130cm 
 Upper Pack: 8-12cm PP over DF from previous storms. 
 Middle Pack: 12/19 FC 4F+ and stronger than locations further south of here. 
 Lower Pack: Strong below old thanksgiving crusts. 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
1/24

Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Anything lee to southerly wind. Some texture on exposed middle elvation slopes with likely a few smaller slabs, but those were isolated.
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
12/19

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: Didn't cover all low/mid elevations aspects but don't expect anything different from what we've seen in distribution.
 Comments: Searched for 1/18 SH and could not find it, but did find rimed PP/graupel near where it should have been. Also did not find it out Baker last weekend. Other folks seem to be finding it so will keep on looking.
STABILITY TESTS
 Stability Test Results: ECTX on east and north 9000'. ECTP26 on 12/19 down 65cm on east @ 8800.
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Collapsing (isolated)    
 Comments: One small collapse on flat @7700' in area i already skinned over. Skied over a few untouched meadows and pockets W/NW/N aspect with not cracking/collapsing.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): Mod where I was and CON up high.
BOTTOM LINE
 Comments: Thought there would be more evidence of old persistent cycle. Wind slabs were likely touchy and would have avoided them today. Wind did not move much snow other than near ridgelines. Would have felt comfortable moving in 35° terrain although getting into anything steeper than that would depend on the path and after some very careful snowpack evaluation on each specific slope.