East Peak off Dana Plateau

East Peak
Submission Info
Tuesday, January 28, 2020 - 1:30pm
37° 54' 29.052" N, 119° 11' 51.8892" W
Snowpit Observations
More detailed information about the snowpack: 

Toured up to the ridgetop of East Peak off the Dana Plateau today from 8000' at Upper Horse Meadows to 11,800' at the ridge.  Goal was to check on wind deposition and sensitivity of wind slabs, and to get a glimpse of the snow pack structure.  Long story short: Winds were bowing snow into the air at treeline and above, but mostly seemed to be sublimating with very little sign of deposition anywhere I travelled today (see attached video).  Faceted snow under crusts in shallow areas such as the sidewalls of gullies.  Wind deposit areas from previous days showed signs of being well bonded (see attached video).  1 or 2 thin wind board areas an inch thick plated out while skiing, very small and isolated.  No signs of any kind of significant instablity.  

Snow depths ranged from 1-2ft in sheltered trees up to 9800', and was quite variable in exposed terrain from wind stripped and bare to over a few feet in deposition areas.  Melt-freeze surface conditions on northerly facing slopes below 8500' stayed firm and frozen today, sunny aspects did show moistening and softening at low elevations, but not too significantly, and at mid and upper elevations winds kept things cold.  Sheltered north facing trees above 8500' had soft faceted surface snow.  East facing chute had quite firm variable thickness underlying firm windboard, mostly supportable, with up to a few inches of wind textured soft snow ontop.  Edges of the gully in shallow areas underlying facets were quite pronounced (2+mm) underneigth a very firm melt-freeze/wind board crust.  See attached video.  No signs of cracking, whumphing.      

Rd to upper horse meadows up to 1/4mi before the trailhead was just barely driveable with high clearance 4x4, with a couple exciting sections. Not for faint of heart at this time.  Adequate supportable snow coverage from the car onward.         

Snowpit videos (tests, etc): 
Weather Observations
More detailed information about the weather: 

Mostly cloudy skies in the morning burned off to blue around noon.  Moderate winds, out of the west over ridgetops with strong gusts, and out of many different directions below ridgetops.  

+4°C at 8000' at 10:30am.

-5°C at 10,900' at 1:00pm.

-10°C at 11,800' at 2:00pm. 

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