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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.10.16 Name: Wieland, VandenBos Operation: SAC
 Drainage/Route:  Baker Creek to Baker Lake Observed Terrain:  Primarily north and south aspects from 6700' to 10,000' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: 18 Sky: X Precip: S1 Temps: 18
 Ridgeline Wind: Moderate and Gusty from the W
 Blowing Snow: L Snow Available for Transport: Large amounts
 Comments: Gusty, infrequent winds were digging deep into terrain features. Most recent snowfall was quite dense, which will probably limit snow transport but the storm certainly provided plenty of ammunition for strong winds.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 10 Baker Creek Today 2 SS N N 7,000'-10,000'
 Comments: Lots of natural activity at tail end of the storm. Many D1's and several D2's. Multiple weak layers failing including facets at the ground and a density inversion in the storm snow less than 30 cm down.
SNOWPACK OBSERVATIONS
 HS: 100cm on N, 70cm on SE @ 8700' 
 Upper Pack: Mix of differing storm snow density. Latest round of snow was most dense. 
 Middle Pack:  
 Lower Pack: SE: 10cm FC/DH, N: 10cm P+ FC under 10-15cm F FC 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: Rose reflects observed avalanches. Suspect that this instability exists around the compass on slopes steeper than 35 that held faceted snow near the ground before the storm.
 
Avalanche Characteristics
Character/Avalanche Problem:
Storm Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: Rose reflects observed avalanches. Suspect that this instability exists around the compass on slopes steeper than 35.
 Comments: Numerous D1 and D2 avalanches observed, often well below treeline. Poor visibility limited observation of upper elevation slopes.
STABILITY TESTS
 Stability Test Results: ECTP12 down 40cm on SE. Appeared to be pre-storm interface or possibly small NSF.
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (widespread)    
 Collapsing (widespread)    
 Comments: Rolling, booming collapses experienced frequently.
SNOW STABILITY
 Snow Stability Rating for your observed area: Poor Confidence: Trend:
FILE ATTACHMENTS

20161210_BakerCreekNaturals_BV.JPG
Natural avalanche activity in Baker Creek drainage on north facing aspect at 7800'.

20161210_BakerCreekNaturals2_BV.JPG
Natural avalanche activity in Baker Creek drainage on north facing aspect at 9200'.