telemark skiingbackcountry skiingPacific NorthwestWashington and Oregonweather linksThe Yuki AwardsMt. Rainier and Mt. Adams
Turns All Year
  Help | Search | Login | Register
Turns All Year Trip Reports
Backcountry Skiing and Snowboarding

Welcome, Guest. Please login or register.
09/24/18, 08:09 AM

Become a TAY Sponsor!
Trip Reports Sponsor
Second Ascent
Second Ascent
Turns All Year Trip Reports
(1) Viewing these pages constitutes your acceptance of the Terms of Use.
(2) Disclaimer: the accuracy of information here is unknown, use at your own risk.
(3) Trip Report monthly boards: only actual trip report starts a new thread.
(4) Keep it civil and constructive - that is the norm here.
Info Exchange

NWAC Avalanche
+  Turns All Year Trip Reports
|-+  2013 Backcountry Trip Reports
| |-+  January 2013 Backcountry Trip Reports
| | |-+  1/29/13 Yodelin High Avi danger
« previous next »
Pages: [1] | Go Down Print
Author Topic: 1/29/13 Yodelin High Avi danger  (Read 2391 times)

Posts: 443

1/29/13 Yodelin High Avi danger
« on: 01/30/13, 11:06 AM »

AlmostAspen and I braved warming temps and heavy snowfall yesterday morn and lapped yodelin front side and back side (toward nordic trails).  Dug a pit and did a Rutschblock and shovel test, poked around ect.  I'm not as scientific as some but here's what we found.  Yodelin north facing slopes were harboring 15-24 new and south/SE/E held 10-20 new.  we dug a pit on the back side in a more wind loaded area.  at pit site there was 20 inches of new with varying densities (mostly heavy) on top of a sun/inversion crust beneath which was the consolidated pack to base. 

It's the top 20 that was concerning.  Rutschblock failed before I could even put my full weight on the column.  It did NOT slide  on the crust but on a facet layer 10cm above the suncrust.  I didn't have a magnifier but upon inspection the facets/frost were clear.  Big facets and some still looking feathery 3-5mm in size.  Shovel test revealed the same. 

Did a ski cut on the only area we thought could slide (there was much less snow under cover of trees) but nothing went.  Still the top 18 inches was somewhat consolidated and the 2 inch with facets on top was very cohesive and I could imagine an easy step down slab avalanche on windloaded open areas.  the bond between the suncrust and the first layer of new that fell was not incredibly strong but did not seem to have facets on top of it.  It appears this most recent storm cycle started with 2 inches or so, then cold and facets, then warm and wet on top.  Good recipe for high avi danger. 

* 20130129_114726.jpg (153.14 KB, 480x640 - viewed 1412 times.)

Posts: 54

Re: 1/29/13 Yodelin High Avi danger
« Reply #1 on: 01/30/13, 05:34 PM »

That's good info. Thanks.
Pages: [1] | Go Up Print 
« previous next »
Jump to:  

Login with username, password and session length

Thank you to our sponsors!
click to visit our sponsor: Feathered Friends
Feathered Friends
click to visit our sponsor: Marmot Mountain Works
Marmot Mountain Works
click to visit our sponsor: Second Ascent
Second Ascent
click to visit our sponsor: American Alpine Institute
American Alpine Institute
click to visit our sponsor: Pro Guiding Service
Pro Guiding Service

Turns All Year Trip Reports ©2001-2010 Turns All Year LLC. All Rights Reserved

The opinions expressed in posts are those of the poster and do not necessarily
reflect the opinions of Trip Reports administrators or Turns All Year LLC

Turns All Year Trip Reports | Powered by SMF 1.0.6.
© 2001-2005, Lewis Media. All Rights Reserved.