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PROFESSIONAL OBSERVATION FORM
 Start Date: 03.15.19 Name: Lundy Operation: SAC
 Drainage/Route:  Iron/Goat Divide Observed Terrain:  6500-9200' Zone/Region:  Sawtooth Mountains
WEATHER OBSERVATIONS
 HN24: HST: Sky: FEW Precip: Temps:
 Ridgeline Wind: Light and Intermittent from the NW
 Blowing Snow: None Snow Available for Transport: Small amounts
 Comments: I was out of the field around 1430 so missed the heat of the day, but overall it felt warm but not hot. A slight breeze up high was helping to keep things a bit cooler.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Mini cirque on the Goat/Iron divide Older than a week 2.5 HS N E 9400 Old, deep pocket that pulled out during the February storm. May have been triggered by cornice fall. See photo and notes below.
 Comments: Mentioned this older slide as it's the 4th or 5th deep pocket I've seen in the Sawtooths. None of them have shown much propagation and all seemed to be in very steep, rocky, shallow areas. Several of them had evidence of being triggered by cornice fall.
SNOWPACK OBSERVATIONS
 HS: 290cm @9000', ESE 
 Upper Pack: Dry FCsf on shady slopes, getting a bit sandy for skinning. E and SE was moist at the surface to a depth of around 8cm at 1400.  
 Middle Pack: n/o 
 Lower Pack: n/o 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
10-40cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Had one small collapse on wind loaded ridgeline. Wind slabs were widespread on the E and SE, but none seemed reactive.
 
Avalanche Characteristics
Character/Avalanche Problem:
Wet Loose

Layer/Depth:
~10cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: I wasn't in the field late enough to truly evaluate the wet problem, but not much was happening on SE by 2pm. Did some cutting and pushing on a steep, SE aspect with no results - just a few rollerballs.
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Collapsing (isolated)    
 Comments: Got one small collapse on a wind pillow beneath a ridgeline
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): Although the wind slabs seemed unreactive, they were widespread enough that I'd have been careful traveling around in the alpine.
FILE ATTACHMENTS

190315_iron_goat_E_9400.jpg
Old, deep pocket (upper right). There was another part of the crown just below the photo.

190315_iron_goat_wind_slabs.jpg
Extensive wind drifting at ridge level, but seemed unreactive to stomping