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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.01.18 Name: VandenBos Operation: SAC
 Drainage/Route:  Titus Observed Terrain:   Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: VAR Precip: Temps:
 Ridgeline Wind: Light from the NW
 Blowing Snow: Snow Available for Transport:
 Comments: Skies cleared into the afternoon for a few hours before thin mid-level clouds pushed their way back in around 4.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 5 Salmon River Headwaters Yesterday SS N S
 Comments: Looks like a little SH (unconfirmed, based on depth and appearance) cycle on SE/E between roughly 7,500 and 8,500'. One deeper slab probably released on a December weak layer. Also noted several wind slabs, likely triggered by cornices in the southern Sawtooths and western Smokys. Tried to get a closer look at the Titus Peak slide but could not safely access crown. Debris looked quite chunky and slab was very dense at the ridge line.
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: 
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

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)    
 Comments: Isolated cracking and collapsing in untraveled middle elevation terrain.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
FILE ATTACHMENTS

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Surface hoar (?) avalanche in Headwaters. Unconfirmed weak layer, based on crown depth.

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Abe's Armchair surface hoar (?) avalanche. Unconfirmed weak layer, based on crown depth. Interesting bed surface.

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Cornice triggered deep persistent (?) slab in heavily wind loaded terrain in southern Sawtooths.

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Persistent slab avalanche above Alturas Lake with associated snomobile tracks.

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Wind slab avalanche that may have released on a deeply buried persistent weak layer above Prairie Creek.

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Surface hoar or more deeply buried persistent slab avalanche in Headwaters. Unconfirmed weak layer.

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Very large windslab avalanches that may have failed on buried persistent weak layer in the western Smokys.