Black Mtn

SNOWPACK OBSERVATION
Black Mtn, North Face
Submission Info
Forecaster
Friday, April 29, 2016 - 12:00pm
Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
38° 2' 23.9244" N, 119° 16' 41.5884" W
Snowpit Observations
More detailed information about the snowpack: 

Black Mtn/Red Lake, Virginia Lake (4/29/16): Intended to ascend the Black Mountain to assess snow stability and wind slab distribution. Departed the Turnbull Lake Trailhead for Red Lake Bowl. 1”to 2” at the trailhead with 2”to 3” in the higher elevations.  New snow was moist where exposed to the sun (dry where shaded and unexposed to sun). Lake ice continues to deteriorate, especially around inlets and outlets. Creeks mostly open below 9,800’. Some ski tracks evident in Red Lake Bowl as well as the flanks of South Peak with one party working the main bowl between Mt Olson and South Peak. Ascended up Red Lakes Bowl, 2”-3” new snow throughout the bowl with shallow winds slabs formed along terrain features and in depressions, favoring NE-SE-SW aspects. Wind Slabs nonreactive. Easterly aspects surface snow is moist up to 10,600’. Above, 10, 600’ snow still cold. Moderate Northwest winds were transporting snow onto NE-SE-SW aspects. Black Mountain (North Face), entry almost complete clear of snow, top ¼ strongly wind affected with wind slabs and wind scour. Below, very consistent soft conditions to the valley floor. All test slopes, negative results with no recent avalanches observed. Some rollerballs noted below Red Lakes Bowl summit ridge (NE aspect, 10,600') and on exit below Cooney Lake (10,245’) on NE aspects both natural and skier triggered, primarily in the trees where the air is calmer and warmer.

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
Northwest
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 
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