Upper TJ Bowl Snowpack and Weather Observation

upper TJ Bowl
Submission Info
Sunday, February 21, 2021 - 12:30am
Upper TJ Bowl 37° 35' 6.036" N, 119° 0' 5.7204" W
Snowpit Observations
More detailed information about the snowpack: 

Toured up to the shoulder below TJ Bowl on Sunday.  On the way we encountered so many different surface textures it was hard to keep track of them all.  One feature that was fairly consistent was a graupel layer.  Sometimes it was pooled on the surface like in exposed areas on lakes.  Sometimes it was thinly buried by new snow in sheltered areas.  Wind textured the surface snow in many areas at and above treeline, but didn't expose the Graupel layer where we could see it.  On the skin track our skis easily cut through the surface and exposed the Graupel.  See Photo

Snowpack photos: 
Graupel pooling beneath the snow surface at mid elevations.
Surface texture in upper TJ Bowl
Any other comments about the observation or links to outside pages that have more info on the observation: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: 


Overall a mild day.  The snow was warmed and sticky on sun exposed aspects and cold in sheltered areas.

Field weather observation:

Location Top of TJ Trees

Time 1245

Elevation 10350

Aspect N


Tair/surf/20 -2.0/-4.0/-7.5

Precip NO

Wind L->W

Blow Snow None

Surface Form/Size PPrg 0.2/FC 0.4

HST 3cm

HS 135 to 200cm

Pen Boot/Pen Ski 5cm/3cm

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