Low surface snow temps and mucho surface hoar

Location Name: 
W end Boreal Ridge above Central Sierra Snow Lab
Donner Summit Area
Date and time of observation: 
Fri, 01/08/2016 - 07:00
Location Map: 
United States
39° 19' 31.0728" N, 120° 21' 51.0588" W

Red Flags: 

Observation made by: Educator at Donner Summit Avalanche Seminars
Snowpit Observations
More detailed information about the snowpack: 

1+ cm surface hoar with very low (-19 C) snow surface temps this morning above the Snow Lab on Donner Summit.

Snowpack photos: 
Weather Observations
Blowing Snow: 
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: