Please remember that these observations indicate what was going on in the snowpack at a single point in time and space. They may not represent conditions where you are or where you plan to be. They also come from a variety of sources. SAC cannot vouch for the quality or accuracy of any observations that come from the general public. Some of these may be professional quality observations; some may not. Please use observations listed on this page as part of your information gathering process, but as always don't make decisions based on a single piece of information. If you are looking for more information on how to understand the information on this page, all of the pit data graphs and stability tests are part of what is presented in a Level II avalanche class that follows the American Avalanche Association (AAA) or American Institute for Avalanche Research and Education (AIARE) curriculum guidelines. All of the coding and abbreviations for data presented follows the publication Snow, Weather, and Avalanches: Observational Guidelines for Avalanche Programs in the United States (SWAG) which is the standard for all professional avalanche programs in the US. An electronic copy is available here. Most of what you are looking for is in Chapter 2 and Appendix F part 1. We use a program called SnowPilot to create the snowpit graphs. It is available as an online tool or as a downloadable program at http://www.snowpilot.org/. This website also has a quick video and user guide on how to use create snowpits. Please send us your observations using the buttons below.
Date and time of observation or avalanche occurrence Location Region Observation Type Photos Snowpack, Avalanche, Weather Videos Snowpit videos (tests, etc) Observation made by
01/02/2019 - 10:00 Porcupine Ridge Luther Pass Area (including Job and Freel) Snowpack Observation A thin wind slab over roughly 15cms of very weak NSFs The wind slab varied in thickness and strength, but did show ability to crack. A lot of Surface Hoar in this area. North facing slopes held some impressively large Surface Hoar. Professional Observer
01/01/2019 - 13:00 Indian Valley Ebbetts Pass Area Snowpack Observation Professional Observer
12/31/2018 - 12:00 Mt Tallac Desolation Wilderness Area (including Emerald Bay) Snowpack Observation Professional Observer
12/30/2018 - 12:30 Tamarack Peak Mount Rose Area Snowpack Observation Exposed dirt and Knife hard sastrugi on Hour Glass Educator
Tahoe Mountain School
12/30/2018 - 11:00 Silver Peak Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Signs of wind scouring on an exposed ridge. Forecaster
12/29/2018 - 14:15 Andesite Peak Donner Summit Area Snowpack Observation Visual outline of the Snowpack on a West Aspect Near Treeline @ 7600' Educator
Tahoe Mountain School
12/29/2018 - 14:00 South shoulder of Stevens Peak Carson Pass Area Snowpack Observation Shady sheltered areas below tree line held very soft faceted snow. Sunny slopes are getting thin and starting to melt out in a few areas. Lots of evidence of previous wind activity. On a ridge area, firm slab over soft weak snow. Reverse skin track, with wind erosion on the east side due to NE winds. Professional Observer
12/29/2018 - 11:45 Upper Cold Stream Cabin Creek, Deep Creek, or Pole Creek Area Snowpack Observation Photo 1: Looking to the west at NE-E aspect near and above treeline terrain along the Sierra Crest, wind scoured snow surfaces and icy crusts were obvious. Forecaster
12/28/2018 - 14:45 Pike's Peak (near highway 108 sno-park) Outside of the Forecast Area Snowpack Observation Public
12/28/2018 - 12:00 Angora Peak Echo Summit Area Snowpack Observation Professional Observer
12/28/2018 - 12:00 Rubicon Peak West Shore Area Snowpack Observation Blowing snow over Jobs/Freel as seen from Hwy 89. Coverage below 7200 ft. remains sparse. Forecaster
12/28/2018 - 12:00 Chickadee Ridge Mount Rose Area Snowpack Observation Public
12/27/2018 - 13:00 Trimmer Bonus Luther Pass Area (including Job and Freel) Snowpack Observation Professional Observer
12/27/2018 - 12:00 Lincoln Ridge Yuba Pass Area Snowpack Observation NE winds scouring cornices and drifting snow over the ridgetop. First signs of recent wind transport in textured surface upon reaching near treeline terrain. At 7,200', 8 inches of recent storm snow on top of 12/22 rain crust. No 12/24 rain crust present at and above 7,200'. ECTP-30 on 12/4 buried surface hoar layer. Forecaster
12/27/2018 - 11:00 Slab Cliffs Mount Rose Area Snowpack Observation 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

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