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Avalanche: Turnagain

Location: Petes South

Date:
Observer:
Route & General Observations

Jason DeHaan, Alex Else, and my self skinned up the alders on supportable crust, easy travel. Made it to top of the ridge to find high quality snow. Saw a large new glide crack on Pete’s North and a large old Avalanche crown on Pete’s South.

Avalanche Details
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Trigger NaturalAvalanche Type0
Aspect South SouthwestElevation 2500ft
Slope Angle 37degCrown Depth5ft
Width 150ftVertical Run 1000ft
Avalanche Details

The avalanche looks like it happened during one of the many rain/heavy snow events last week. The crown is 3-6 feet deep and deepest when it contacts a big rock, 100-150 feet wide and created a large debris pile 800-1000 feet below. It is several days old but impressive nonetheless.

Red Flags
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Observer Comments

No obvious sign of instability, only a fresh mega glide crack on the south face of Petes North.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Partly cloudy skies, light snow, calm winds 5-10 gusting to 15 occasionally, temps upper 20's to low 30's

Snow surface

Supportable melt freeze crust below 1500', breakable crust with 2-5' new snow up to 1800', crust totally gone by 1850' wind affected 4f powder, with pockets of lower density snow. Good skiing above 1800'

Snowpack

Dug a pit at 2200'. HS 250cm, dug to 130cm. Right side up snowpack with no significant stability test results.
Ct 15 Q3 30cm
CTN X2

Photos & Video
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