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  1. #1
    Join Date
    Feb 2005
    Location
    North Vancouver/Whistler
    Posts
    13,985

    Post artic outflow windslabs

    https://m.facebook.com/story.php?sto...22112681222210

    Nice video embed above in link of touchy slab in St Helens area

    This isn't representative of anything other than a windslab issue but appropriate enough following a classic artic outflow.

    There'll now be variable depths, stoutness and weakness of slab present. Because the winds have been so gusty and due to the nature of SW BC micro terrain the N and NE facing winds will have slabbed up all sorts of terrain. But it will slab opposite to the standard typical storm winds we get so the slabs can catch parties who're unaware.

    Some things I think about following an artic outflow.

    The storm slab can propogate a lot and tends to be at the start zones of typical paths (but not always). The typical bro ski cut or cornice bomb the start zone and happily gut full path might not be the best call.

    You got to flip what you think about aspect 180 degrees. Which can be really hard but not impossible.

    A return to typical SW storm snow on deposited NE wind slab is particularly tricky as everything looks so enticing. But now the N facing goods have potential trigger points all over the place.

    Anyhow. TL:dr. Typed while flat on back recovering from manflu. I got pics of a 3.5 triggered from reverse loaded NE windslab that managed to be cohesive enough to pull me off my feet where i was on a "safe zone" so am consequently a touch wary. Anyone else want to add stuff?

  2. #2
    Join Date
    Dec 2016
    Posts
    25
    Sketch.... I like this better.

    BackSide Elevated Education: http://www.youtube.com/playlist?list...77vdofS8_AGD9G

  3. #3
    Join Date
    Dec 2016
    Posts
    25
    Quote Originally Posted by CCconcrete View Post
    Sketch.... I like this better.

    BackSide Elevated Education: http://www.youtube.com/playlist?list...77vdofS8_AGD9G
    #19

  4. #4
    Join Date
    May 2006
    Location
    west tetons
    Posts
    2,090
    I saw that short vid when you posted it on FB. Some asinine comments too. Looks like a touchy little bugger, and big enough to scare you, rake you through some trees if you missed the terrain force flows and odd deposition. In general this can be the kind of situation where the Familiarity heuristic trap enters the game, right? Unfamiliar conditions bring unfamiliar avalanches, so you better alter your practice. Which is what you said above, for sure.

  5. #5
    Join Date
    Feb 2013
    Posts
    2,620
    FYI guy who posted it is a weather guy for one of Portland Oregon's TV shows so that explains a lot of the mouth breathing comments.

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