These observations document past conditions at a small and variable scale. They are not to be confused with an avalanche forecast. They come from a variety of sources. We can only vouch for the quality of those produced by the SAC forecasters and professional observers.
Date and time of observation or avalanche occurrence Location Media Observation made by
01/29/2017 - 15:00
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		scouring from E wind looking south from Andesite PeakSurface hoar near skin track to Castle Pass Guide
Tahoe Mountain Scho
01/29/2017 - 10:00
Snowpack Observation 		Negro Canyon
Donner Summit Area 		Melting/ free water dripping cornice on SE aspect at 7,500' at 9:45am.Rapidly melting sun crust on SE aspect at 7,500' at 9:45am.Human triggered rollerballs on E aspect at 7,640' at 10am. Forecaster
01/28/2017 - 15:00
Snowpack Observation 		Shallenberger Ridge
Donner Summit Area 		Guide
Tahoe Mountain Scho
01/28/2017 - 12:09
Snowpack Observation 		North ridge trees off incline lake
Mount Rose Area 		Public
01/28/2017 - 12:00
Snowpack Observation 		Echo Peak
Echo Summit Area 		Public
01/28/2017 - 12:00
Snowpack Observation 		Lincoln Ridge
Yuba Pass Area 		Surface hoar near a creekLarge cornice pieces dropped onto a test slopeScoured surfaces along the ridgeline @ 7680 ft.Settlement cracks around trees Forecaster
01/27/2017 - 16:00
Snowpack Observation 		3rd drainage north of "Peak 9614", S of Monument Peak
Outside of the Forecast Area 		Variable wind affected & consolidated powder looking S at ridgeDebris field looking back up drainage skied. Public
01/27/2017 - 15:00
Snowpack Observation 		near Monument Peak
Luther Pass Area (including Job and Freel) 		Public
01/27/2017 - 12:00
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Wind transport and scouring along Andesite RidgeSkier triggered crack on a wind loaded W facing test slopeNatural cracking on a wind loaded W facing test slope Forecaster
01/27/2017 - 12:00
Snowpack Observation 		Tamarack Peak
Mount Rose Area 		Small localized cracking in wind loaded terrain from E winds. 9600', SW aspect.Wind effect on Prolitariate BowlWind effect along East Ridge of Tamarack Peak.Settlement cones around trees. Forecaster
01/27/2017 - 10:00
Snowpack Observation 		W end Boreal Ridge above Central Sierra Snow Lab
Donner Summit Area 		Professional Observer
01/26/2017 - 12:00
Snowpack Observation 		Mt. Rose
Mount Rose Area 		Small crack on a previously undercut wind loaded SE facing test slope @ 9900 ft.Wind scouring along the W side of the ridgeline @ 10000 ft.Oven to refrigerator sized cornice peices dropped onto a wind loaded NE facing slope at 10000 ft. did not trigger any signs of current instability. Forecaster
01/26/2017 - 11:00
Snowpack Observation 		Punisher Saddle
Echo Summit Area 		Professional Observer
01/25/2017 - 13:02
Avalanche Observation 		Porcupine Ridge
East Shore Area
Public
01/25/2017 - 13:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Public

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