Close
PROFESSIONAL OBSERVATION FORM
 Start Date: 03.01.17 Name: Savage Operation: SAC
 Drainage/Route:  Smiley and Vienna Creeks Observed Terrain:  7200-9000', all aspects Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 1-5cm HST: ~30cm Sky: FEW Precip: Temps: teens F
 Ridgeline Wind: Moderate and Intermittent from the W
 Blowing Snow: L Snow Available for Transport: Small amounts
 Comments: Scattered clouds became CLR by 1400hrs
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 3 Smiley Ck headwaters Older than a week 2 U U NE 9400-9600 some big cornice fall and debris from slides during last big storm is still evident
 4 GrandPrize Today 1 L N SW alpine several small dry loose or wet loose in sun affected terrain in Grand Prize, W and SW aspects
SNOWPACK OBSERVATIONS
 HS: over 350cm at 8600-9000' SE/E/NE 
 Upper Pack: <.5cm SH on surface (getting cooked by sun on W-S-E): 1cm sun crust in the making on W-S-E: 30cm PP/DF: SH shards all laying down: then well graded DF and RG 
 Middle Pack: Not observed 
 Lower Pack: Not observed 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
20-60cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: Didn't get the chance to jump on many, solo mission. I didn't see anything touchy or very touchy though.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
10-50cm

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: Wind slabs below 8500' were not sensitive to ski cuts or snowmobile. Could only get 2m wide chunks to crack/break in very steep terrain
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
30cm

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:

Terrain
  Problem 3 Comments: Buried SH laying down. Unsure of distribution - seemed isolated to 8600-8900' but didn't check likely terrain above that elevation.
STABILITY TESTS
 Stability Test Results: ECTN16 and ECTN18 on SH layer at 30cm, dirty shears: other ECTN easy and moderate on density changes in top 25cm but also all dirty shears.
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)   Length: 2m
 Comments: Took a lot of effort to get wind slabs to crack - most would not crack.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: MODERATE Trend: