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
12/20/2017 - 12:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Shooting cracks triggered by ski kicks on an E facing wind-loaded test slope at 7900 ft.The same slope after it failed on the next ski kick. Forecaster
12/20/2017 - 11:45
Snowpack Observation 		Chickadee Ridge
Mount Rose Area 		Small wind slabs reactive to ski cuts. N aspect ~9,100'.Small wind slabs failed easily on test slopes. N aspect ~9,100'. Forecaster
12/20/2017 - 11:00
Snowpack Observation 		Castle Valley
Donner Summit Area 		No visible blowing snow along the ridges. Guide
Tahoe Mountain Scho
12/19/2017 - 12:30
Snowpack Observation 		Incline Lake Peak
Mount Rose Area 		1.7m ECTP-21 failing on F hard facets below P hard wind slab. Forecaster
12/19/2017 - 11:15
Snowpack Observation 		Slab Cliffs
Mount Rose Area 		Significant wind scouring below treeline that had occured sometime after mid day on Dec 16. Forecaster
12/19/2017 - 09:30
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Minimal snow coverage below 7500 ft.Scoured surfaces on exposed slopes in above treeline terrain.Near surface facets. Forecaster
12/18/2017 - 15:00
Snowpack Observation 		Frog Lake Ridge
Carson Pass Area 		Professional Observer
12/18/2017 - 13:00
Snowpack Observation 		just S of Andesite Peak
Donner Summit Area 		Educator
Donner Summit Avalanche Semina
12/18/2017 - 12:45
Snowpack Observation 		Ophir Peak
Mount Rose Area 		Minor wind scouring on the top 100' of peak. Large boulders and trees still poking out of snowpack. Forecaster
12/18/2017 - 11:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Exposed firm rain crust on an open slope.Wind affected surfaces on a NW aspectCoverage on the N side of Castle. Forecaster
12/17/2017 - 12:30
Snowpack Observation 		Lincoln Ridge
Yuba Pass Area 		Variable wind scoured snow surfaces in open N-NE facing areas at 7600 ft.Firm rain crust exposed by wind scouring on a NE aspect near the ridgeline.Snow coverage at 7200 ft. Near surface facets on northerly aspects. Forecaster
12/17/2017 - 12:07
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Surface Conditions mix of sustrugi and melt freeze crusts Educator
Tahoe Mountain Scho
12/16/2017 - 12:30
Snowpack Observation 		Incline Lake Peak/Slab Cliffs
Mount Rose Area 		Strong to Gale force NE winds moving minimal amounts of snow to S side of ridgeline.Small cracking just off ridgeline from minor wind loading on S aspects. Forecaster
12/15/2017 - 14:00
Snowpack Observation 		Trimmer Peak
Luther Pass Area (including Job and Freel) 		1-2 cm Surface Hoar observed in open areas below 8000 feet.Treed areas above 8000 feet had sticky wet snow by noon. Professional Observer
12/15/2017 - 12:00
Snowpack Observation 		Elephants Back/Frog Lake Cliffs
Carson Pass Area 		Soft near surface facets in the trees with wind scoured surfaces below ridge. Forecaster

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