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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.23.17 Name: Wieland Operation: SAC
 Drainage/Route:  Frenchman Ck Observed Terrain:  7300-9000 Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 10-22cm HST: 10-22cm Sky: OVC Precip: S-1 Temps:
 Ridgeline Wind: Moderate
 Blowing Snow: M Snow Available for Transport: Large amounts
 Comments: Cloud cover dissipated around 12. Wind shift from W to N around 14:30. Windy drive from Baker Ck to Frenchmans and up drainage but then nothing on slopes at head of drainage. Most ridges above 9k in Frenchmans had plumes and snow transport most of day. Snow was very low density.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Frenchman Today 1 SS N SE 8900' Small slide but broke on FC above 12/19 crust. Had small 4F 4cm wind slab above crust with subtlety wind affected HST above that. Near this slide on same slope/aspect could not get ECT to propogate as 4cm over crust was weaker and not wind affected. Nothing else near ridge would move on ski cut.
 2 Frenchman Today N NE 9300 wind slab in crossloaded feature. 1 on NE, 1 on E. East may have gone several times but had poor light on it all day to view.
 1 Cirque north of Cabin Pk Today 1 N E
 Several Mill Gulch Today 1 N SE 9400 Several slabs failed mid slope. appear to be 1-2' deep. Some ran mid storm.
 Several Gladiator Ck Today 2 N 9700 S and SW slopes. Smaller slides near ridge. larger slides below ridge in cirque below thing kitty litter rocks.
 1 Dry Cnyn W Was pretty far away but looked like dry loose
SNOWPACK OBSERVATIONS
 HS: 55cm on south at 8600' 
 Upper Pack: 10-22cm HST over 3-4cm DF resting on thin layer of FC above crust. 
 Middle Pack: n/o 
 Lower Pack: n/o 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: More isolated in middle and low elevations
STABILITY TESTS
 Stability Test Results: ECTN down 23 cm below crust.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): Rated this based on observed slides. Wish I could have poked around more wind loaded terrain. Would have traveled like CON in alpine.
BOTTOM LINE
 Comments: More wind at low and middle elevations than expected. But also surprised at some middle elevations that had little to no wind affect on exposed slopes and near ridges. Small pockets of wind slab even forming near valley bottom in frenchmans but quite small. Pretty good natural cycle. Still lots of low density snow to blow around. Sledders out Pole ck said they saw no avalanche activity.
FILE ATTACHMENTS

P1000069.jpg
Frenchman Slab

P1000080.jpg
Mill Gulch

P1000093.jpg
Gladiator

P1000094.jpg
Gladiator