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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.11.19 Name: VandenBos Operation: SAC
 Drainage/Route:  Butterfield Observed Terrain:   Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: Precip: Temps:
 Ridgeline Wind: Calm
 Blowing Snow: Snow Available for Transport:
 Comments: Weak inversion had set up already (no thermometer, just by feel) but everything was pretty darn cold in the AM. Winds calm.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Butterfield East Remotely triggered on 1/10. 1.5-3' crown, 80' wide. Failed on a MFcr on top of 15cm of 4F DH. DH was slightly moist at the ground and very dry and cohesion-less just below the MFcr.
STABILITY TESTS
 Stability Test Results: In Butterfield crown: ECTP23, PST 33/100 END
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Collapsing (isolated)    
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
FILE ATTACHMENTS

190111_ButterfieldCrown.jpg

190111_ButterfieldSlide.jpg