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Avalanche in Tumalo Bowl

Location Name
Tumalo Bowl
Region
Three Sisters Area
Name
ryanL
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Position
Public
Date and time of avalanche (best estimate if unknown)
Red Flags
Recent loading by new snow, wind, or rain
Obvious avalanche path
Avalanche Type
Slab
Blowing Snow
Yes
Trigger type
Other-please explain in the comments
Wind Speed
Moderate
Wind Direction
West
Air temperature
Below Freezing
Air temperature trend
Static
Bed Surface
Old Snow
Precipitation
Snow
Weak Layer
Storm Snow
Crown Height
3 ft
Accumulation rate
<1
Avalanche Width
100ft.
Avalanche Length
350ft.
Terrain
Above Treeline
Number of similar avalanches
1
More detailed information about the avalanche

 My partner and I were the first ones up to the Bowl this morning.  There was major cornice buildup along the whole ridge and rapid wind loading occuring.  We felt it prudent not to ski the main shoot between the rocks due to conditions.  This was the only entrance without catching airtime off the cornice, as it ran most of the length of the bowl.  I carefully kicked a small block of snow that slid into the bowl and propagated a small windslab, 10-16" deep, 30 feet wide that ran most of the way down the bowl.  R1 D1.   We proceeded down the ridge to the snowmobile area (southeast end of the bowl).  There were no tracks in this area either.  We dropped down the ridge to where the cornice ended and carefully kicked a small block into the bowl which propagated a larger slab, probably 100 feet wide, and around 3' deep at it's deepest spot up ridge below the cornice, that ran about 150 meters.  R1D1.5.  It was amazing how little it took to set these off.  Literally a 3x3 ft block of snow, if that, sliding into the start zone.  This certainly could have been skier triggered and taken someone for a ride.  We then put in a ski cut down ridge of the debris and skied a few laps beside the debris flank.  Great, low density snow.  When we were done we headed back to the top and a solo skier had just dropped the main line in the bowl and nothing moved.