Obs from Rock Creek Alpine Terrain

Mono Pass
Submission Info
Volunteer Observer
Thursday, January 3, 2019 - 5:30pm
37° 25' 28.1064" N, 118° 46' 24.8124" W
Snowpit Observations
More detailed information about the snowpack: 

Toured from Rock Creek Sno-Park over Halfmoon and Mono Passes in a successful effort to find "adventure" skiing and every kind of snow conditions imaginable. 

  • Widespread surface hoar up to 3mm is evident from TL to ATL elevations and was found on all but the most solar aspects, even in wind prone areas. 
  • In heavily wind affected areas such as large drainages dense P+ windboard was found overlaying large faceted crystals, similar to observations from other areas in the range. Windboard and sastrugi was the story for most of the alpine terrain exposed to winds. No stability tests were performed.
  • Surface conditions outside of these wind prone slopes were mostly surface hoar and near surface facets, and steep terrain with exposed rocks or trees (Half Moon Pass) had a snowpack comprised entirely of facets and depth hoar. Ski pen was >40cm and boot pen was >1m. This bottomless faceted snowpack was observed as high as 11600' and as low as 10200', and entrained other loose surface snow on steep slopes. 
  • Skiing down Mono Pass to Ruby Lake on SE and S aspects let us trade loose dry for loose wet conditions. Surface snow was saturated down to 10cm and we observed natural rollerballs, natural loose wet activity up to D1.5 in chutes on Mt. Starr and Pointless Peak, and could easily skier trigger small loose wet slides. 
Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
More detailed information about the weather: 

Strong solar radiation was felt today, with springlike conditions at 12000'. 

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