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
12/02/2021 - 11:00
Snowpack Observation 		Lincoln Ridge
Yuba Pass Area 		Move snow cover at 7,600' than we have seen in the rest of the forecast area. Facets from the Nov 9 layer starting to show striations. Surface hoar in excess of 1 cm that will likely be destroyed before burial. Forecaster
03/30/2018 - 11:30
Snowpack Observation 		Chickadee Ridge
Mount Rose Area 		Skier triggered pinwheels on a SE aspect at 8500 ft. at 11:20 am. Boot top deep wet snow on a SE aspect at 8500 ft. at 11:20 am. 4 to 6 inch deep ski penetration into wet snow on S aspect at 8800 ft. at noon. Forecaster
11/07/2022 - 13:00
Snowpack Observation 		Andesite Ridge
Donner Summit Area 		Layering of the new snowpack Coverage around 7500' on Northerly aspects Thin sun crust forming on SE aspects Coverage on south face of Castle Peak Forecaster
04/21/2020 - 11:00
Snowpack Observation 		Rubicon Peak
West Shore Area 		Ankle deep boot pen before 11am on E aspect, 8200'. Rapidly warming and deteriorating, but still supportable conditions before 11am. Glide cracks developing out in Desolation Wilderness. Forecaster
03/13/2023 - 12:15
Avalanche Observation 		Andesite Peak
Donner Summit Area 		Storm slab, intentionally skier triggered, BTL terrain around 7,800' Storm slab, intentionally skier triggered, BTL terrain around 7,800' Storm slab cracking while breaking trail in wind protected BTL terrain. Moving above the skin track so that the storm slab was undercut made it easy to identify the layering. Shooting crack Forecaster
11/27/2012 - 12:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Forecaster
04/15/2011 - 13:00
Snowpack Observation 		Schellenberger Ridge
Donner Summit Area 		Forecaster
01/17/2020 - 14:00
Snowpack Observation 		Munchkins Area
Blackwood Canyon or Ward Canyon Area 		Ski kick triggered shooting cracks on ENE facing wind-loaded slope. Skier triggered shooting cracks on N facing wind loaded slope. Skier triggered shooting cracks on a NW facing slope. Forecaster
03/14/2014 - 12:15
Snowpack Observation 		Rubicon Peak
West Shore Area 		Forecaster
02/29/2016 - 12:00
Snowpack Observation 		Mt. Houghton & Tamarack Pk
Mount Rose Area 		Forecaster
12/27/2018 - 11:00
Snowpack Observation 		Slab Cliffs
Mount Rose Area 		Wind exposed areas scoured from the recent NE winds. ECTN at pit location. Lower snowpack mostly faceted and weak. Skin track refilled within 2.5 hours from wind transport in open below treeline terrain. Forecaster
12/29/2019 - 12:30
Snowpack Observation 		Ophir Peak
Mount Rose Area 		Blown down 3-5mm surface hoar in open meadows at 8600'. Decomposing Dec 12 RC. Upper snowpack made up of near surface facets and wind blown snow. Previous wind scouring on northerly near treeline terrain. Increasing clouds with very light snow starting at 12. Forecaster
02/09/2014 - 02:00
Avalanche Observation 		Andesite Ridge
Donner Summit Area
Forecaster
01/07/2011 - 11:24
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Forecaster
02/23/2015 - 11:25
Snowpack Observation 		Rubicon Peak
West Shore Area 		Forecaster

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