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PROFESSIONAL OBSERVATION FORM
 Start Date: 03.18.18 Name: Savage Operation: SAC
 Drainage/Route:  Baker Ck and Brodie Gulch Observed Terrain:  6700-9300' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: trace-2cm HST: 25-35cm Sky: BKN Precip: Temps: 20s F
 Ridgeline Wind: Moderate from the NW
 Blowing Snow: L Snow Available for Transport: Large amounts
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
  Apollo Ck Within past week 2 SS U E 9600 unknown trigger (natural or sled), crown and flanks getting blown back in
 Comments: I observed almost no activity from last storm, only one crown noted. No significant sluff piles either.
SNOWPACK OBSERVATIONS
 HS: variable due to wind  
 Upper Pack: solars over 8500': 25-35cm PP with new surface razor crust on due W and due E and more stout surface crust on SW-S-SE...then crust below recent storm snow...then hodgepodge of crystal types (RG/crust/melt freeze/maybe a tiny bit of FC) for about 40cm...then 2/14 FC above a crust  
 Middle Pack: brief tour, not observed below 2/14 layer 
 Lower Pack: not observed 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
20-60cm

Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:
Isolated
Terrain
  Primary Concern Comments: Strange loading patterns from shifting winds that appeared to blow at different speeds. More wind affected slopes than wind loaded slopes. Snowmobilers and skiers above the lake did not trigger anything, and I could barely find any pillow that I could cause to crack.
 
Avalanche Characteristics
Character/Avalanche Problem:
Dry Loose

Layer/Depth:
10-15cm

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:
Widespread
Terrain
  Problem 2 Comments: No sluffs observed. Minimal rollerballs from the sun today. Guessing the sun was muted enough to prevent sun-induced loose snow issues?
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
70-100cm

Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:

Terrain
  Problem 3 Comments: No activity or signs of instability noted.
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
BOTTOM LINE
 Comments: Little activity from the recent storm and lots of snowmobile and sled tracks in avalanche terrain with no results. Some previous wind-loading in the Baker Creek/Baker Lake area, but no obvious wind slab avalanches. Upper elevations and some middle elevation terrain was actively wind-loading this afternoon (N/NW winds). Snowpack appears to be turning the proverbial corner in this area and is in the process of transitioning to a "what you see is what you get" scenario.
FILE ATTACHMENTS

20180318_164515.jpg
9300' between Baker and Brodie - active wind-loading and wind affected slopes in Apollo in background