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PROFESSIONAL OBSERVATION FORM
 Start Date: 03.24.19 Name: VandenBos, Linnet Operation: SAC
 Drainage/Route:  Hyndman Creek Observed Terrain:  6,600-10,000' Zone/Region:  Wood River Valley
WEATHER OBSERVATIONS
 HN24: HST: Sky: X Precip: Temps:
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport:
 Comments: 12cm HST at ~10,000' as of 1400, wet 6cm at 6,500'. Snowing S1 to S2 throughout tour (0900-1400) with no sign of letting up when we exited the field. Calm to very light wind blowing out of the south, not transporting snow, but did not enter exposed upper elevation terrain.
AVALANCHE OBSERVATIONS
None Reported
 Comments: Poor visibility, but observed active sluffing/spindrifting in steep, rocky terrain. Saw one D1 debris pile below steep, rocky terrain.
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: Stout, supportable MFcr on south half of the compass underlies PP. Shaded aspects were dry DF in sheltered areas above ~9,000' and stiff wind board in exposed areas. Ambient MFcr below ~9,000' on shady aspects 
 Middle Pack: n/o 
 Lower Pack: n/o 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Dry Loose

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: In steep, upper elevation terrain where >6" of snow have fallen. This was primary concern based on the terrain that we considered entering.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: Not encountered directly. Suspect it may have been an issue on exposed, upper elevation slopes. Will likely become more of a problem as wind speeds increase tomorrow
 Comments: Did not encounter wet loose problem where we traveled, but based on recent natural activity (Murdock) it is something to watch out for on steeper, low elevation slopes.
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
BOTTOM LINE
 Comments: Without a lot of wind and solar input things were pretty quiet today. I'd imagine this will change tomorrow with a good dose of sun and an increase in wind speed. Surfaces below the new snow are pretty firm and anything that gets moving (wind slabs, solar initiated dry loose, wet loose) will likely pick up speed quickly. Nice to see a bit of a refresh. I'd imagine with cooler temps tonight the deeper wet problems have been put on hold for the time being