Close
PROFESSIONAL OBSERVATION FORM
 Start Date: 12.13.18 Name: VandenBos - OFF DUTY Operation: SAC
 Drainage/Route:  Copper Mountain Observed Terrain:  to 8,800', primarily on the northern half of the compass Zone/Region:  Sawtooth Mountains
WEATHER OBSERVATIONS
 HN24: HST: 15cm Sky: SCT Precip: Temps:
 Ridgeline Wind: Light
 Blowing Snow: Snow Available for Transport: Large amounts
 Comments: Plenty of snow for the wind to move around, particularly if it shifts direction.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 N Copper Yesterday 2 HS N NW 8,800'
 1 N Copper Yesterday N N 8,000'
 1 Copper Proper Yesterday N N 8,700'
 Comments: Only listed major slides, also observed some smaller slides on the west-facing wall that bounds the north gully off of Copper.
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: 11/22 DH
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Problem 2 Comments: 12/12 FC
 Comments: Recently buried facets and early season depth hoar are more easily separated as distinct problems here. A good bit of natural activity on the DH and widespread collapsing don't bode well for the future.
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (widespread)    
 Collapsing (widespread)    
SNOW STABILITY
 Snow Stability Rating for your observed area: Poor Confidence: Trend:
FILE ATTACHMENTS

181213_Copper_8000North.JPG

181213_Copper_8800NW.JPG

181213_Copper_8800NW_2.JPG

181213_Copper_8800NW_3.JPG

181213_Copper_8800NW_4.JPG

181213_CopperProper.JPG