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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