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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.18.18 Name: Davis, VandenBos Operation: SAC
 Drainage/Route:  Titus Ridge Observed Terrain:  8-10,000', W-N-SE Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 4" HST: 4" Sky: OVC Precip: S2 Temps:
 Ridgeline Wind: Moderate and Gusty from the SW
 Blowing Snow: M Snow Available for Transport: Large amounts
 Comments: Light snow picked up to S3 by the time we reached the second bump. Moderate, gusty wind from the SW and W was readily transporting new and existing snow.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Titus Lake Chutes 1.5 SS U NE 9900' Unsure of the timing on this slide but it had at least a few inches of snow on it when we arrived at ~1400.
 Comments: There were also some small pockets of fresh wind slab and broken cornice on the skiers left side of the Titus Lake Chutes.
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
Near Ground

Likelihood of Triggering
Sensitivity:
Touchy

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: (11/22) DH
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
~30-40cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: Info from PRO1 course pits, 12/12 is showing up as small FC and SH but they haven't found much of a cohesive slab above it.
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)    
 Collapsing (widespread) Depth: Ground Length: Up to 400'
 Comments: Despite heavy traffic, this area continues to grumble and rumble. One collapse was felt by two groups more than 400' away. We also felt deep collapses along the windloaded ridgeline headed up to the Titus Lake Chutes.
SNOW STABILITY
 Snow Stability Rating for your observed area: Poor Confidence: HIGH Trend: Worsening
BOTTOM LINE
 Comments: The current snow structure continues to be less than inspiring. It'll be interesting to see what kind of activity we got overnight with over an inch of water in 48 hrs along Titus Ridge and if some wind-loading or heavy snow was enough to get 12/12 going.
FILE ATTACHMENTS

181219_TitusWindSnow.jpg
Wind and snow along Titus Ridge.

P1130270.jpg
Small slab pockets and cornice breaks.