These observations document past conditions at a small and variable scale. They are not too 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 Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
03/21/2021 - 11:00 Upper Flume creek Sierra Buttes Outside of the Forecast Area Avalanche Observation Public
03/21/2021 - 10:00 Red Lake Peak Carson Pass Area Snowpack Observation Cracking in freshly formed wind slab on SW gully feature Reverse skin track possibly from yesterday on an exposed, cold, windy ridge Large 8mm surface hoar was widespread near the summit of Red Lake Peak. Strong E wind visibly blowing snow over the ridge Consistent CT RP results about 10 cms down from the surface. This is within the recent storm snow. Two ECTs and two ECTNs showing similar results to the CTs but no propagation. Skier triggered slide from yesterday in main gully. This is a frequent slide and the debris ran nearly the full length. Impressively wide avalanche that was reported yesterday. Another previous slide that appeared to be from yesterday or earlier on a more south facing slope where it appeared a cornice break triggered a wind slab below. Professional Observer
03/20/2021 - 16:00 Tragedy springs Carson Pass Area Avalanche Observation Public
03/20/2021 - 15:18 Hiram Peak Ebbetts Pass Area Avalanche Observation Public
03/20/2021 - 15:00 Donner Peak Donner Summit Area Avalanche Observation A wind slab avalnache on Donner Peak seen from I80 on 3/21/21 Forecaster
03/20/2021 - 12:50 Frog Lake Cliffs Donner Summit Area Avalanche Observation The torn up snow is where the victim parked their snowmobile. The footprints lead to the edge where the cornice broke. Overview of the slope the victim fell down. The arrow is where the person broke the cornice. Side view of upper part of the slope. The cornice that broke and the crown of the slab avalanche the cornice failure triggered. Overview of the slope. There is a helicopter about halfway up the slope on the right side for scale. The upper part of the slope. The lower part of the slope where the victim was found. Forecaster
03/20/2021 - 12:45 Red Lake Peak Carson Pass Area Avalanche Observation Public
03/20/2021 - 12:15 above Meiss meadow Carson Pass Area Avalanche Observation Overview of incident; crown, chute, entrance slide path, cliff hidden in pic 1, crowns runout, debris Public
03/20/2021 - 12:00 Hungalelti Ridge Carson Pass Area Snowpack Observation Professional Observer
03/20/2021 - 11:30 Rubicon Peak West Shore Area Snowpack Observation Breakable rain crust at 6,900' under 1 inch of new snow. Buried March 18 rain crust at 7,900'. One small loose wet avalanche seen on E face of Crag Pk at 11:30 am. It was not there at 10 am. A mix of sun and cloud cover during the morning hours. Forecaster
03/20/2021 - 10:33 Red Lake Peak Carson Pass Area Avalanche Observation Public
03/20/2021 - 09:00 Shirley Canyon Cabin Creek, Deep Creek, or Pole Creek Area Avalanche Observation Guide
Alpenglow Expeditions
03/19/2021 - 13:28 Andesite Peak Donner Summit Area Avalanche Observation crown below cornice fall triggered Avalanche Debris Side view of crown Guide
Alpenglow Expeditions
03/19/2021 - 13:20 Andesite Peak Donner Summit Area Avalanche Observation Public
03/19/2021 - 12:30 Galena Peak Mount Rose Area Avalanche Observation Public

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