Storm Slab Instability on Red Cone

Red Cone
Submission Info
Wednesday, March 20, 2019 - 7:45pm
Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Rapid warming
Obvious avalanche path
Terrain Trap
Red Cone 37° 35' 44.5092" N, 119° 1' 27.48" W
Snowpit Observations
More detailed information about the snowpack: 

Toured from the Tamarack TH up to the top of Red Cone.  The only visible snow transport on the drive up 395 was off the top of Morrison.  Left the car at 0930 - about 22cm of new snow by the side of the road was already moist where exposed to the sun, wind-sculpted in areas, and otherwise still dry powder.  Toured up into fog around 9750'.  Found some thin wind slabs up near the final ridge below the top of Red Cone, as well as widespread reactive storm slabs about 12cm thick.  Decided not to ski the bowl and instead found smaller west-facing slopes off the ridge and then dropped down to Horseshoe Lake.  Skiing was in nice powder on N-faces, good enough for two more laps.  It was easy to trigger small storm slabs on any steep (39 degrees or more) slopes.  Even N-facing slopes below about 8850' held heavy wet snow.

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

Precip started light at the TH at 0930 then was moderate to heavy in the early afternoon higher up and even when I got back to the car.  Mostly cloudy in the morning and around 0C air temp, but got colder in the afternoon.  Winds were inconsistent - calm to moderate.

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