Snow conditions near Sonora Pass

Location Name: 
Sonora Pass
Region: 
BWRA
Date and time of observation: 
Sat, 02/20/2021 - 12:00
Location Map: 


Red Flags: 
Recent loading by new snow, wind, or rain

Observation made by: Professional Observer
Snowpit Observations
Snowpack photos: 
Any other comments about the observation or links to outside pages that have more info on the observation: 

Temperatures topping out near freezing, quickly clearing skies and 4" of new snow brought a nice day and a good refresh to the BWRA.  New snow fell on a mosaic of variable crust layers in the upper snowpack. A shiny firnspiegel crust was intermittant and most evident at higher elevations.  Below was a unreliably supportable wind crust covered by either new snow or firnspiegel.  Strong winds overnight continued during the day today, moving snow over ridges and exposed terrain while leaving scoured zones behind. 

New wind slabs exist in near and above treeline terrain. We observed a small slab release below a cornice. Test slopes resulted in minor cracking without release. 

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
None
Wind Direction: 
Northwest
Accumulation rate: 
None