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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.06.19 Name: VandenBos, Antonioli Operation: SAC
 Drainage/Route:  Baker Creek Observed Terrain:  6,700-9,700, most aspects Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: 20-25cm Sky: Precip: Temps:
 Ridgeline Wind: Moderate and Gusty
 Blowing Snow: Snow Available for Transport: Large amounts
 Comments: Small holes of blue sky on the drive north and while unloading sleds, primarily overcast after that. Brief periods of up to S1 during the afternoon with 1cm accumulation total. Moderate winds were moving snow up high (visually) but weren't currently blowing hard enough at middle elevations to be consistently moving snow.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 3 Today 1 SS AS NE 9,200-9,400' Ski cutting at ridgeline in wind loaded terrain produced soft slabs, on the stubborn side of reactive. Dense soft slabs.
SNOWPACK OBSERVATIONS
 HS: 70cm 
 Upper Pack: 20-25cm PP 
 Middle Pack: A few MFcr plus/minus facet combos on solar aspects. 2-3mm FC on cold aspects 
 Lower Pack: Moist to wet DH on solars, dry on shadys 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
30-60cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: 
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: 
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (widespread)    
 Collapsing (isolated)    
 Comments: Widespread localized cracking in the new snow anytime the skis were dropping through facets towards the ground and in wind loaded terrain on slopes steeper than 30. Collapsing was isolated to heavily wind loaded locations near ridgelines.
SNOW STABILITY
 Snow Stability Rating for your observed area: Poor Confidence: Trend:
FILE ATTACHMENTS

190106_BakerWindTransport.JPG

190106_BakerWindTexture.JPG

190106_BakerAS.JPG