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Observation: Turnagain

Location: Lynx Drainage

Date:
Observer:
Route & General Observations

Rode into Lynx Creek drainage to look for recent avalanche activity, either naturals from the storm or human triggered since the opening of this zone on Saturday 1/27. Although evidence of widespread naturals from 1′ of new snow on 1/26, there were no human trigger avalanches observed despite lots of folks enjoying the new snow Jan 27 and 28 – several tracks on many slopes.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Spoke with a party that reported a remotely triggered soft slab avalanche on Saturday 1/27; ~100' wide and ran ~300'. This was on the back side of the Lynx drainage into Juneau Ck drainage - not visible from Lynx drainage.

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

Valley fog up to 2000' and single digit temps at Johnson Pass trailhead. Noteworthy inversion - temps were approximately in the mid teens above the fog layer. Winds were calm throughout the day.

Snow surface

12" of snow at all elevations from January 26th storm, blown into 2 ft drifts in places.

Snowpack

Hand pits on the ascent were showing good bonding with the 1 foot of 1/26 snow and underlying crust - there was also the absence of a slab (very loose surface snow). Near 2000', the 1/15 crust was roughly 1" thick and degrading (easily breakable under a snowmachine). The snow below the crust was weak and faceted.

Dug a formal pit at 2200' NW aspect. Tests performed in the top meter of the snowpack. ECTN17 & ECTN21 on the January 21 buried surface hoar down 12". No other results.

Photos & Video
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