Snow conditions in Negro Canyon

Location Name: 
Negro Canyon
Region: 
Donner Summit Area
Date and time of observation: 
Mon, 01/10/2011 - 16:00
Location Map: 
United States
39° 20' 33.342" N, 120° 18' 17.586" W
US


Red Flags: 

Observation made by: Forecaster
Snowpit Observations
More detailed information about the snowpack: 

In this lower elevation area (6500 ft - 7800 ft.), 4-8 inches of soft, cold snow existed on most of the slopes (even on the open slopes) that face the northerly half of the compass. On these slopes the some surface hoar remnants existed even though most of these grains were destroyed during the day. Below the surface the top 3-4 inches of snow has started to facet and turn into weak sugar like snow grains. Near the highest ridgelines on slopes more exposed to the wind, the winds had left wind firm wind scoured surfaces on those same aspects. On the W-SW-S-SE aspects a firm sun crust existed on the snow surface. This crust ranged from 1-2 inches thick and was sometimes breakable and sometimes supportable. Layer bonding tests, ski cuts, hand pits and other stabilty tests in this area all showed stable results.

Snowpit videos (tests, etc): 

MVI 1006

Weather Observations
Blowing Snow: 
No
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
Air temperature trend: 
Cooling
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: