Avalanche: Turnagain

Location: Lynx Creek Drainage

Date:
Observer:
Route & General Observations

Rode into Lynx Creek Drainage to take a look at any recent avalanche activity. Many storm snow avalanches, likely from 1/24-25.

Avalanche Details
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Trigger NaturalAvalanche Type Soft Slab
Aspect WestElevation 4000ft
Slope AngleunknownCrown Depth 18in
WidthunknownVertical Rununknown
Avalanche Details

Many storm snow avalanches 1-2' thick from the last pulse of the storm cycle from 1/22 - 1/25. These were most likely triggered 1/24-25. They released near the ridgeline on the east side of the drainage (west facing slopes). This is common for this zone during stormy weather.

No avalanche activity seen on the south or western sides of the drainage.

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

No cracking or collapsing, only the recent storm snow avalanches. However, we were very cautious due to the MLK buried surface hoar that sat under the storm snow.

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

Obscured/overcast skies, calm wind, temperatures near 30F and the 20's F at 2,800'.

Snow surface

Crusty melt-freeze conditions below 1,500'.
Soft settled powder above 1,800'. There was about 8-12" of new snow that fell during the 1/22 - 1/25 storm cycle above 2,000'.

Snowpack

We dug several pits targeting the top 3' of the snowpack. We found the MLK buried surface hoar in all pit, yet only above 2,500' did it start reacting (below this it was wetted by rain and not showing signs of a weak layer).

Snowpit at 2,800', North aspect: ECTP 13 and 17 on the MLK buried surface hoar down 12" (30cm). Once the layer failed, it popped out of the pit wall.

We stuck to lower angle slopes and did not see signs of natural buried surface hoar avalanches. This area is very suspect for human triggers above 2,000'.

We saw no evidence of glide activity, which is pertinent as the drainage had countless cracks and releases in December and early January.

Photos & Video
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