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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.17.19 Name: Savage, VandenBos Operation: SAC
 Drainage/Route:  East Fork Baker - Fox Peak Observed Terrain:  6,700-9,000' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: 20-25cm Sky: VAR Precip: S1 Temps:
 Ridgeline Wind: Moderate from the W
 Blowing Snow: Snow Available for Transport: Large amounts
 Comments: Afternoon WX obs: 1300-1700. Winds shifted early in the afternoon, blowing low end of moderate out of the W/NW, easily transporting snow. Skies opened up for a bit (locally) in the early afternoon before a shot of colder precip and low clouds pushed in from the W/NW around 1600.
AVALANCHE OBSERVATIONS
None Reported
 Comments: Visibility was generally poor, did see a small wind slab pocket near Fox Peak and some suspected debris piles below W face of Boulder Peak . Saw one D1 wet loose next to the highway across from Hulen Meadows on the drive back south.
SNOWPACK OBSERVATIONS
 HS:  
 Upper Pack: 20-25 cm PP sitting on MFcr+FC on solar aspects and more subtle FC on shaded aspects 
 Middle Pack: 20-30cm 4F+ to F FC 
 Lower Pack: 15-30 cm DH, generally quite dry, even at the ground 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: Lumping mid-pack weak layers and basal facets/DH in here. New/old interface has the potential to be a persistent issue looking forward, particularly on solar aspects and on low elevation slopes that were beneath the inversion this past week. Still waiting to see if basal issues will wake up with one of these loading events, pretty hard to trust a structure like this.
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)    
 Collapsing (isolated)    
 Comments: Cracking and collapsing in recently wind-loaded terrain only. More cracking than collapsing. No collapsing on deeper weak layers in the area we traveled, hard to know how much of an affect previous ski traffic had on this - odds are a previous skier had already collapsed the weak layers in this location prior to our visit.
SNOW STABILITY
 Snow Stability Rating for your observed area: Fair Confidence: LOW Trend: