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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.16.18 Name: VandenBos - OFF DUTY Operation: SAC
 Drainage/Route:  Mushroom Ridge Observed Terrain:  southern half of the compass to 9800' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: Precip: Temps:
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport: None
 Comments: Afternoon wx obs: mild temps, layer of stratocumulus slowly pushing its way in over the Smoky and Sawtooth crests. It looked like it might be starting to spit just a touch of snow in the sawtooths at sunset.
AVALANCHE OBSERVATIONS
None Reported
 Comments: No new activity observed
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: 
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)    
 Collapsing (isolated)    
SNOW STABILITY
 Snow Stability Rating for your observed area: Fair Confidence: Trend:
BOTTOM LINE
 Comments: Much warmer for a more sustained period than we've seen since the previous snowfall on Wednesday. The new snow from Wednesday did a good bit of squatting and internal bonding during the day today. My suspicion is that this will make it easier to communicate fractures for longer distances, particularly as this slab is loaded in the coming days. This was the missing ingredient during Wednesday's storm. Snow surface got burned enough to put a crust on the southern quarter of the compass. This crust felt like it could be also be a potentially reactive interface as it gets loaded (12/17). If forecast verifies we are in for some hazardous conditions.