Negro Canyon

Location Name: 
Negro Canyon
Region: 
Donner Summit Area
Date and time of observation: 
Sat, 03/25/2017 - 14:00
Location Map: 
United States
39° 20' 15.396" N, 120° 17' 25.134" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Rapid warming
Observation made by: Guide at Tahoe Mountain School
Snowpit Observations
More detailed information about the snowpack: 

Heavy wet snow existed on E-S-W aspects today at all elevations. New snow depth ranged 6-10 cm on west facing sloaps at 6500' over old suportable melt freeze crust. Temperatures increased to well above freezing this afternoon and we witnessed a skier triggered loose wet avalanche on an east facing aspect as two skiers descended at around 12:30.  (Barely visible in photo 1). 

Photo 2: Wet unsuportable snow surface

Photon 3: Broken clouds existed over the area for most of the afternoon, with scattered snow showers turning to rain at 3:45 pm, at 6500'

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
None
More detailed information about the weather: