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Observation: Turnagain

Location: Corn Biscuit - Davis Creek

Date:
Observer:
Route & General Observations

We skinned up lower Davis Creek (between Corn Biscuit and PMS bowl, Magnum) to look at a far running pile of debris that filled up Davis Creek and stopped just short of the power line from the 2 week storm cycle 3/8-3/25. We measured the runout distance of 18- 20 degrees depending on the start zone of either Super Bowl, Magnum Peak or a high point on the Northern Chutes of Corn Biscuit. We also toured up the North shoulder of Corn Biscuit to 2000′ to try to figure out which avalanches created the long running debris pile. It was a little confusing due to a lot of avalanches releasing over the two week storm cycle. We aren’t 100% sure, but think the N. chutes of Corn Biscuit released as one single event and caused a large amount of debris to flow into Davis Creek. Photos taken on 3/20 after the North chutes avalanched confirm that Super Bowl hadn’t avalanched at all. The bench below Super Bowl also didn’t have any debris running over it on 3/20 despite the SW facing terrain on Magnum, next to Super Bowl did avalanche. PMS bowl didn’t have any notable avalanches other than some cornice fall and a small slab in the alpine. It was pretty easy to distinguish the difference between the older original debris that ran through davis creek and the newer wetter debris piles from the wet slabs that occurred later in the storm cycle after 3/20. See photos below for more details.

Red Flags
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Observer Comments

Several glide avalanches released today on Seattle Ridge.

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

Thin cloud cover, partly sunny
35-45F
Light winds
No precip

Snow surface

Top cm of soft wet loose surface (corn snow) on supportable crust - this was soft this morning due to cloudy overnight skies and above freezing temps. Even shaded aspects had soft wet loose surface below 2000', our high point.

On steeper south aspects in the afternoon the crust was not as supportable and more punchy.

Snowpack

Didn't dig any pits.

Photos & Video
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