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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.28.17 End Date: 02.28.17 Name: Savage Operation: SAC
 Drainage/Route:  Silver Ck/Baker Ck Observed Terrain:  6700-8200', all aspects Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 2-8cm HST: ? Sky: VAR Precip: S1 Temps: 6-12F
 Ridgeline Wind: Moderate and Intermittent from the W
 Blowing Snow: L Snow Available for Transport: Small amounts
 Comments: Weather ranged from FEW clouds to squalls with strong erratic winds and S3 for brief periods.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: PP and DF with some wind slabs/shards; some solar and temp crusts in upper 50cm; some graupel and mid-storm densite changes 
 Middle Pack:  
 Lower Pack:  
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
10-60cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Isolated
Terrain
  Primary Concern Comments: Almost no wind slab below upper elevation on Smoky Mts side of the road and the slabs were soft... definitely some stiffer slabs and more widespread in the Boulder front. Still not that touchy/sensitive with the force of the sled/skis on sled. Above treeline=different story (widespread, actively loading, probably more sensitive).
STABILITY TESTS
 Stability Test Results: No standard tests performed. Lots of "hand columns" showed no obvious failure planes, dirty shears, and nothing too alarming.
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)   Length: 1m
 Comments: Some cracking on the Boulder Mts side of the road with borderline hard slabs on crusts. But cracks did not go far.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: HIGH Trend:
 Comments (aspects and elevations of instability, etc): Baker Ck/Smoky Mts side = softer slabs, stability approaching very good at middle and lower elevations.
Boulder foothills = stiffer slabs, stability fair to good
Upper elevations in this area = looked like it would have been easy to get in trouble based on extent of wind loading (still loading at 1600hrs)
FILE ATTACHMENTS

170228_Boulder_foothills_windloading.jpg
Lower and middle elevation wind loading in Boulder foothills