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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.10.19 End Date: 01.10.19
 Drainage/Route:  Newmans CR. Butterfield Observed Terrain:  8,000-9700' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 7cm HST: Sky: BKN Precip: Temps: 0c / -2c
 Ridgeline Wind: Light and Intermittent from the W
 Blowing Snow: None Snow Available for Transport: Small amounts
 Comments: Warm morning started to climb at 11:00 am at 8K Air 0 c . light green housing as we climbed solar aspects taking heat and they will have a MFcr in morning . cooling temps 14:00 SN showers developed as we exited the field at 15:00 S-1
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 East Bowl Today 3 SS ASr E 9.600'
 Comments: SS-ASr-R4-D3-G East Bowl Butterfeild 9,600" East 20190110 13:30 1mx30mx500m start zone at the top of path and ran to the bottom of run out zone Didn't get on to Deposit pile but it was quite large. Weak later was 11/22 DH 4mm DRY and the bed surface was the Ground. Slide was remotely triggered 75 yards away on the east ridge. Large wind pillow collapse propagated out
SNOWPACK OBSERVATIONS
 HS: 80cm-90cm solar aspect multiple MFcr with FC sandwich in between / cold aspects very poor structure at the ground with new load on top over 1/2 the pack is FC  
 Upper Pack: 20cm F PP, 10cm 4F PP, 20cm 1f DF 
 Middle Pack: 20cm 4f FC (12/11) 
 Lower Pack: 30cm F DH 4mm Dry 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
90cm

Likelihood of Triggering
Sensitivity:
Touchy

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: think we could have triggered more slides today trigger needed
 
Avalanche Characteristics
Character/Avalanche Problem:
Wet Loose

Layer/Depth:
20cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: 
 Comments: Very weak structure in this drainage. Many Red Flags today. no recent natural avalanche activity observed. I think it just needs a trigger!! very bottom less SN pack it skied as if it was upside down. recent warm days have consolidated new storm snow into a reactive slab on top FCsf. Truly overloading the weak layer. I would guess this zone received close to 50cm of snow from 1/5 storm
STABILITY TESTS
 Stability Test Results: No real test today, lots of pole pokes quick hand pits so many obvious instability signs today we just kept moving. Solar aspect very suspect as well with MFcr and FC in between crust. Large collapse's on solar aspect as well today
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated)    
 Collapsing (widespread) Depth: 90cm  
 Comments: would be very suspect of any terrain >33* with this structure. I believe there are lots of other slopes just waiting for a trigger.. These collapses we had today are traveling out far distances and one should be paying close attention to what you are connected to.
SNOW STABILITY
 Snow Stability Rating for your observed area: Very Poor Confidence: HIGH Trend: Steady
 Comments (aspects and elevations of instability, etc): Its going to take time for this PWL to relax. Skiing was pretty punchy and bottomless today. Wind loaded aspects with large fetches >35 spooky
BOTTOM LINE
 Comments: There is a big change in the SN pack from this location to Galena Summit, Galena appears to be much stronger and has had time to adjust from all prior storms. Central Valley snowpack is made up of 1/2 faceted crystals and 1/2 new storm snow.that is consolidating into a unhappy slab.