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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.17.18 Name: Lundy-OFF DUTY Operation: SAC
 Drainage/Route:  Copper Mountain Observed Terrain:  6900' - 9000' from 1300 to 1600 Zone/Region:  Banner Summit
WEATHER OBSERVATIONS
 HN24: 8cm HST: 8cm Sky: X Precip: S-1 Temps:
 Ridgeline Wind: Moderate from the SW
 Blowing Snow: L Snow Available for Transport: Small amounts
 Comments: HN was dense, and moist at the highway level. Snowfall tapered off by the afternoon with a few periods of S-1. Moderate SW winds but all the snow that was available for transport had already moved.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 2 Copper NE Gullies Today 2 HS N NE 8900
 Comments: Not positive these released today - it was nearly whiteout conditions on top, but what I could see looked fairly fresh especially given the new snow and wind loading. However it is possible it released with the last snowfall when Ben was up here last. There wasn't much snow left on the bed surface so suspect they ran to the depth hoar.
SNOWPACK OBSERVATIONS
 HS: 50-75cm on the westerly terrain I observed. Info below is from a pit on Bruces at 8200', W  
 Upper Pack: 8cm F PP (HN24)
15cm F+ DF (12/12 storm) 
 Middle Pack: 40cm FCsf F at top going to RG 1F at base of layer 
 Lower Pack: 15cm DH 3-4mm F - no ice crust on ground 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
11/22 - 50-60cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: 
 Comments: No significant wind slab problem observed.
STABILITY TESTS
 Stability Test Results: The pit described above produced two ECTP14's. ECTN on the 12/12 layer
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated) Depth: 50-60cm Length: 100'
 Collapsing (isolated) Depth: 50-60cm Length: 100'
 Comments: When approaching the pit location described above on Bruces, I collapsed/cracked a large area about 100' in diameter.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): .75"-1" of water would probably bump mid to upper elevation shady aspects to high, especially with wind. Lower elevations and solars are a mixed bag of conditions - the 12/12 facets are pretty weak in places, others slopes still have quite a bit of sage poking through. I think it would take a load >1" of water to bump these areas to high.
BOTTOM LINE
 Comments: Similar story as other places - starting to develop a decent slab atop very weak depth hoar. Would have liked to dig on upper elevation north but there wasn't time today to get to a good place. Riding conditions are still pretty thin, especially down low, and snow quality was decreasing with the warm temps.
FILE ATTACHMENTS

181217_copper_profile.jpg
This profile was on Bruces at 8200', W. ECTP14 x2 down 50-60cm on the depth hoar