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
02/04/2023 - 15:27
Snowpack Observation 		Horse Canyon Ridge
Bear Valley Area 		Public
02/04/2023 - 14:30
Avalanche Observation 		Andesite- summit ridge
Donner Summit Area 		Guide
Outdoor Adventure Cl
02/04/2023 - 14:00
Snowpack Observation 		Deep Creek
Donner Summit Area 		Multiple tilt tests showed no failures in upper snowpack. Buried surface hoar 2-4'' below surface. Not showing to be reactive at mulitple locations. Very, very small cornice failure during the wind event today. Increasing clouds and winds looking west at the Sierra Crest. Guide
Tahoe Mountain Scho
02/04/2023 - 10:00
Snowpack Observation 		Yuba Pass
Yuba Pass Area 		Cracking around skis while breaking trail. The longest cracks were 4 feet long. Large 25-30 mm SH under a surface slab. Jan 29 SH layer down about 12 cm PST 18/100 SF on Jan 29 SH layer, 4F hard slab over 25-30mm SH. 10 cm artificial slab added to the snow surface We left the artificial slab to sinter while we went and made other obs. When we returned to test the sample, someone had found it and their curiosity had lead them to damage it. Forecaster
02/03/2023 - 14:00
Snowpack Observation 		Pacific Valley
Bear Valley Area 		Public
02/03/2023 - 11:45
Snowpack Observation 		Silver Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		Blowing and drifting snow depositing onto N aspect terrain. The Jan 29 buried surface hoar layer at noted lat/long (N aspect, 7,540'). Experimental PST with artificially created slab added above the snow surface. Forecaster
02/02/2023 - 16:00
Snowpack Observation 		Near Jennifer Trail 7600’ Adjacent to Incline Peak SW Drainage
Mount Rose Area 		Public
02/02/2023 - 12:00
Snowpack Observation 		Stoney Ridge
West Shore Area 		N aspect in the shade = moist surface snow. N aspect in the sun = moist to wet surface snow. E aspect in the sun = wet surface snow. 8 to 10 mm buried SH on N aspect at 7,000'. Unreactive in shovel tilt/tap tests. Forecaster
02/02/2023 - 12:00
Snowpack Observation 		Mt Ralston
Echo Summit Area 		Public
02/02/2023 - 10:25
Snowpack Observation 		Intense wind distribution on Carson Pass.
Carson Pass Area 		Looking up at Round Top from Winnemucca Lake. Elevated ghost tracks from recent winds. 30cm boot pen of near surface facets on west aspect. Buried surface hoar under 4" of snow. Compression test results on buried surface hoar. Breaking through 4" wind slabs in above treeline terrain.. Wind sculpting in above treeline terrain. Professional Observer
02/01/2023 - 11:55
Snowpack Observation 		Cold and wet snow on Echo peak
Echo Summit Area 		Big overhanging cornices across the ridgeline. Scoured ridgeline at the summit. A completely scoured Mt. Ralston. Dry near surface facets on shaded aspects. Wet clumpy snow on solar aspects below 7500'. No results on shovel tilt on E aspect@ 8800' Hard supportable crust on E aspect @ 8800'. Natural dry loose snow off of rocks overhead. Professional Observer
02/01/2023 - 11:30
Snowpack Observation 		Deep Creek Peak
Cabin Creek, Deep Creek, or Pole Creek Area 		N aspect with some NE wind protection. Buried surface hoar at lower elevations up to 10mm in size. Small wind slab cracking on N aspects from recent E wind loading. Ridgelines were a mix of some soft and firm snow surfaces. Some future snow available for wind transport as SW wind increase Thursday night. View N on the Sierra Crest. Forecaster
02/01/2023 - 10:00
Snowpack Observation 		Tallac
Desolation Wilderness Area (including Emerald Bay) 		Looking out across Desolation Wilderness. Extensive scouring visible. Large overhanging cornice at the top of the Cross Couloir. Estimated to be overhanging by 10+ feet. Skiers left Cross entrance Extensive settlement Public
01/31/2023 - 12:00
Snowpack Observation 		Elephant's Hump
Carson Pass Area 		Not much snow from Sunday in this area Multiple snowpack tests failed to indicate instability Freel and Job's Sister in the distance with no wind transport observed Markleeville Peak, The Nipple, and Forestdale with no wind transport observed Professional Observer
01/31/2023 - 12:00
Snowpack Observation 		Incline Lake Peak
Mount Rose Area 		Widespread wind scouring in near and above treeline areas. Hard wind slab up to 8'' deep. These did not extend very far downslope and were only reactive when the underside of slab was cut. Small reactive wind slab in BTL terrain. Small cracking on wind slab features from previous NE wind loading. Refrozen hard tree bombs around and under treed areas. Forecaster

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