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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.25.17 Name: Savage Operation: SAC
 Drainage/Route:  Boulder Ck/Dry Canyon (rec day/not working) Observed Terrain:  6500-8600', W-S-E Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: ? HST: 10-20cm Sky: CLR Precip: Temps: 0-10F
 Ridgeline Wind: Moderate and Steady from the W
 Blowing Snow: L Snow Available for Transport: Small amounts
 Comments: Winds MOD to almost STR above 7600'
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Boulder Ck, W of Amber Lakes Yesterday 2 U N SW 9700 Crown visible but did not see debris. Appeared fresh, either today or yesterday. Alpine terrain, well below ridgeline but wind affected.
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: 10-20cm low density storm snow past couple days: sporadic 2/22 razor crust mainly on SE: 2/19 crust .5-1cm thick and 20-40cm down - variable thickness and whether it existed or not even on SW-S-SE 
 Middle Pack: unremarkable DF in top meter, some wind affected snow (small shards) in places 
 Lower Pack:  
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
10-40cm

Likelihood of Triggering
Sensitivity:
Touchy

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Fresh slabs actively forming/growing would be touchy on slopes approaching 40*, not so much on slopes <35*. Previous generations of wind slab were very stubborn in my limited testing. Some minor cross-loading on SW-S aspects.
STABILITY TESTS
 Stability Test Results: No standard tests performed. Lots of hand pits with no clean shears in upper 50cm, including on 2/22 and 2/19 crusts.
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)   Length: 1m
 Comments: Soft wind slabs on east facing Dry Canyon side of ridge would crack.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: HIGH Trend:
 Comments (aspects and elevations of instability, etc): MODERATE at middle elevations due to wind slab issue. LOW at lower elevations.
BOTTOM LINE
 Comments: Soft and hard wind slabs actively forming at ridgelines from about 7600-8600' but there isn't that much snow available to be easily transported. Unless the wind kicks up a notch, we'll run out of snow to blow around. New slabs were mostly just below ridgeline but some very isolated, thinner new SS forming on cross-loaded slopes.
FILE ATTACHMENTS

170225_8500E_loading_DryCanyon.jpg
Wind loading 8500' E aspect Dry Canyon