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
04/22/2023 - 11:15
Snowpack Observation 		Mt. Tallac
Desolation Wilderness Area (including Emerald Bay) 		Cathedral Bowl looking in through northern entrance with some older cornice fall and wet loose debris visible. A sizable rockfall event occurred off of the rock buttress in the center top portion of the frame while we were in the lower portion of the bowl. Recent wet loose avalanches on E aspect slopes just to the north of Cathedral Bowl. Forecaster
04/23/2023 - 09:00
Snowpack Observation 		Flagpole Peak
Echo Summit Area 		7am cloud cover over Lower Echo Lake Good day for spring mountaineering practice, except boot penetration was already getting deep by 9am Large cornices and recent wet loose activity along the Becker/Talking/Ralston ridge This recent avalanche had a flank that appeared more slab-like than loose Professional Observer
04/23/2023 - 10:56
Snowpack Observation 		Scout Peak
Echo Summit Area 		6" of boot pen on S aspect @ 0930 @ 8900' Upper level cirrus clouds with lower level cumulus throughout the day. Punchy wet snow along the ridgeline. Weak 2-4cm melt freeze crust from last night. Wet clustery snow near and below the surface. Professional Observer
04/23/2023 - 11:00
Snowpack Observation 		Mt. Judah
Donner Summit Area 		Recent cornice collapse with wet loose avalanche along the Lincoln/Anderson Ridgeline. Shin deep boot pen with marginal ski supportability at 11:30am on E aspects. 5'' of very wet surface snow on top of a 1F M/F crust 2'' thick. Below that up to 3' of wet snow. Cloud cover looking south along the Sierra Crest. Large deep cracks opening up as cornices pull away from ridges. Forecaster
04/23/2023 - 19:15
Snowpack Observation 		Allison Ridge - Rose Knob Peak
Mount Rose Area 		Cracking and recent collapses of the cornice Public
04/24/2023 - 11:00
Snowpack Observation 		Rose Knob Peak
Mount Rose Area 		When we stepped off our skis we sank into deep wet snow on SE-S aspects by 10:45 and on SW aspects by 11:30 am. Some places where a shallower snowpack existed near the ridge held deep wet snow at 11 am. The snow remained ski and boot supportable on SW and W aspects until sometime between 11 and 11:30 this morning. Forecaster
04/25/2023 - 08:00
Snowpack Observation 		Rose Knob
Mount Rose Area 		Public
04/25/2023 - 11:00
Snowpack Observation 		Jakes Peak
West Shore Area 		The bottom part of a SE aspect on Jakes Peak. Not very smooth with a marginal refreeze at lower elevations. Ski pen on E aspects at 10am near 7500'. Boot pen was ankle deep at 10:30am on E aspects in isolated areas. Remains of an old large avalanche, probably from March, that ran through this area. Views into Desolation Wilderness with a deep snowpack. Forecaster
04/26/2023 - 11:00
Snowpack Observation 		Castle Peak
Donner Summit Area 		Wet surface snow on top of a weak refreeze layer on top of deep wet snow on an E aspect at 9:30 am. Deep holes that go down to flowing creeks are starting to form in the Castle Peak Meadows. The snow was starting to become unsupportable on SE-S aspects by 10:45 am. Runnels in the snow surface indicate melt water draining through the snowpack. Forecaster
04/27/2023 - 10:00
Snowpack Observation 		Red Lake Peak
Carson Pass Area 		A solid (if shallow) refreeze just below 8000' at 8:00AM Boot pen was minimal at 9:00AM at about 9400' Looking down on Meiss Meadows area. Classic corn conditions around 9:30AM Tough spot to grow up for this Juniper, with multiple branches broken by slides in this avy path. At 10:00AM at 8,000' on a south facing slope there was a couple cms of surface softening, and then nearly 20 cms of frozen snow over wet snow. It took some work to shovel through the frozen snow on top. Professional Observer
04/27/2023 - 11:00
Avalanche Observation 		Mt Judah
Donner Summit Area 		Guide
Tahoe Mountain Scho
04/27/2023 - 11:00
Snowpack Observation 		Relay Peak
Mount Rose Area 		East aspects off of the E ridge of Relay Peak. 4''+ supportable melt freeze crust P-1F hardness at 10:30am on E aspects Forecaster
04/28/2023 - 11:00
Avalanche Observation 		Andesite Peak
Donner Summit Area 		D1 wet loose avalanche triggered by a ski cut above the slope on an ENE aspect @ 11:00 am Small sluff of wet snow triggered by a ski kick above the slope @10:45 am. Another small wet loose avalanche triggered by a ski cut above a NE facing slope @ 11:15 am. Ankle-deep wet snow on an E aspect at 10:15 am. Runnels in the snow surface indicating melt water draining through the snowpack Forecaster
04/29/2023 - 11:00
Avalanche Observation 		Jakes Peak
West Shore Area 		Public
04/29/2023 - 11:00
Avalanche Observation 		Johnson Canyon
Donner Summit Area 		A thin weak refreeze existed on top of a deep layer of residual wet snow. Ski cuts triggered small D1 wet loose avalanches on steep test slopes. Large crevasse-like cracks exist where cornices are pulling away from the ridges. Forecaster

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