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PROFESSIONAL OBSERVATION FORM
 Start Date: 04.06.18 Name: Savage Operation: SAC
 Drainage/Route:  Warm Springs Ck Observed Terrain:  viewing avalanches from below/on debris Zone/Region:  Wood River Valley
WEATHER OBSERVATIONS
 HN24: 0 HST: Sky: Precip: Temps: 50F at valley floor
 Ridgeline Wind:
 Blowing Snow: Snow Available for Transport:
 Comments: Some rain fell last night/in past 24hrs, guessing about .1-.3" at the avalanche location
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Warm Springs Ck Yesterday 3 WS U NW 6600-7200' probably natural trigger, appeared to be WL that caused the WS to fail
 1 Warm Springs Ck Yesterday 3 WL U N similar to slide above This one ran more vertical feet but did not trigger or involve a slab.
 Comments: Slides were in the burned area to the north of the Baldy ski area boundary in the Big North/Big Casino area. Both initiated well below the level of the bike path.
STABILITY TESTS
 Stability Test Results:
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
BOTTOM LINE
 Comments: Impressive avalanches that took out a lot of timber (100's of burned standing dead trees and some mature, >50 yr old green trees at the very toe). Now that the trees have been cleared from the path, the next big slide will have an easier time making it an extra few hundred feet to the structures that were almost hit this time. Best guess on failure layer for the slide to the looker's right (the wet slab) is 2/14 faceted crystals; the pattern and crown depth would fit with observations from the many avalanches that failed on this layer in the neighboring mountains on March 22-3.
FILE ATTACHMENTS

20180406_182921.jpg

20180406_183503.jpg

20180406_183534.jpg

starting zones.jpg
Starting zones of the 2 slides

wet slab crown.jpg
Zoom on crown of wet slab