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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.27.18 Name: VandenBos Operation: SAC
 Drainage/Route:  Cross, Baker, Silver Observed Terrain:   Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: Precip: Temps:
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport:
 Comments: Dead calm and clear with moderately cold air temps on top of the cross in the morning. Winds increased into the afternoon when I was up Baker, blowing light with moderate gusts out of the NW. Air stayed relatively cold through the day. Clouds increased into the afternoon, mostly cloudy by sunset. Low, raggy clouds hanging over Bounders, Pioneers, and Sawtooths with a thickening set of high stratus and the occasional stack of lenticulars visibile to the west. Lots of snow up Baker from the storm, upwards of 18".
AVALANCHE OBSERVATIONS
None Reported
 Comments: Too many to list individually. Widespread cycle in the Boulders. Based off of photos it does not look like anything was failing deeper than 2/14 interface but widely propagating fractures were able to produce a handful of D3s and many D2s. Lots of loose activity as the storm was raging, thanks to the low density snow. Today was cold-ish but plenty warm enough for the late February sun to get solar initiated dry and wet loose slides going, up to D2 observed (in terrain near Baker Lake). I suspect that steep solar terrain was producing natural loose activity in many places this afternoon. I remotely triggered a D2 on a north aspect immediately above Baker Lake from just below the ridgeline. Could feel snow becoming ever so slightly stiffened by the wind as I ascended and I tucked in next to a rock in a safe spot and grabbed hold of a nice horn and started stomping. Slide released ~100' downhill of me, breaking ~ 100' wide on 2/14 (based on estimated crown depth of ~2').
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
45-75cm

Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: Most dangerous in wind loaded areas.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wet Loose

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Problem 2 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: Confidence: Trend:
FILE ATTACHMENTS

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Boulder Peak

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Ridge between Boulder and Silver

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Smoky Crest, looking up Prairie Creek

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Looking up Norton Creek from Baker Creek Road

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Just above Baker Lake summer TH, remote triggered by snowbike?

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Ridge of Baker Peak above Castle Cr

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North of Big Peak, above Bluff Cr

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Decker?

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Better photo of Verlons remote trigger