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
12/17/2020 - 08:00

Avalanche Observation
Billy's Peak

Cabin Creek, Deep Creek, or Pole Creek Area
Forecaster
12/16/2020 - 14:00

Snowpack Observation
Ellis Peak

West Shore Area
Guide

Blackbird Mountain Guid
12/16/2020 - 14:00

Snowpack Observation
Donner Rest Area

Donner Summit Area
Public
12/16/2020 - 11:00

Snowpack Observation
Meadow Below Andesite Peak

Donner Summit Area
Public
12/16/2020 - 11:00

Snowpack Observation
Stoney Ridge

West Shore Area
Decent coverage in the Stoney Ridge area, but there are still lots of large rocks present. Lower elevation snowpit. You can see the 2 crusts in the pit wall. the worriesome weak layer is below the lower crust. Forecaster
12/16/2020 - 09:45

Snowpack Observation
Andesite Peak

Donner Summit Area
At least 5 whumpfs while ascending through this open area. 1 cm thick surface melt-freeze crust. 2mm thick surface melt-freeze crust. Signs of minor E wind scouring on ridgetop. Forecaster
12/15/2020 - 16:00

Snowpack Observation
Tamarack Lake

Mount Rose Area
ECTP23 on interface between facets and Dec 11 wind slab Was able to squeeze facets and get some cohesion Glop City, USA Public
12/15/2020 - 14:30

Snowpack Observation
Deep Creek

Cabin Creek, Deep Creek, or Pole Creek Area
Snow pits Roller balls , Guide

Alpenglow Expeditio
12/15/2020 - 13:45

Snowpack Observation
Stevens Peak

Carson Pass Area
Public
12/15/2020 - 11:15

Snowpack Observation
Incline Peak

Mount Rose Area
Evidence of E wind scouring overnight. Mid morning snow surface warming on SE aspect at 9,500'. Fragile cornices linger. Forecaster
12/15/2020 - 11:00

Snowpack Observation
Mt Judah Sunflower Ridge

Donner Summit Area
Dec11 facets are uniformly fist hard and loose below new snow and rain crust Low Tide generally small cornice on judah ridge Public
12/15/2020 - 09:15

Snowpack Observation
Above long creek

Yuba Pass Area
EctP7down35 cm. On dec 11 layer December 11 facet layer Snow pit Public
12/14/2020 - 14:30

Snowpack Observation
Ellis Peak

Blackwood Canyon or Ward Canyon Area
Public
12/14/2020 - 12:00

Snowpack Observation
Lower Round Top

Carson Pass Area
Professional Observer
12/14/2020 - 11:00

Snowpack Observation
Silver Peak

Cabin Creek, Deep Creek, or Pole Creek Area
Northerly below treeline terrain like this is where the Dec 11 weak layer is present. Cracking down to Dec 11 facet layer when traveling through terrain. Widespread whumpfing and cracking started around 7000' in terrain like this. Forecaster

Pages