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

Welcome, Guest. Please login or register.
11/19/17, 11:52 PM

Become a TAY Sponsor!
 
Trip Reports Sponsor
Pro Ski Service
Pro Ski Service
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.
 
FOAC Snow
Info Exchange


NWAC Avalanche
Forecast
+  Turns All Year Trip Reports
|-+  2014 Backcountry Trip Reports
| |-+  March 2014 Backcountry Trip Reports
| | |-+  March 07, 2014 Clara Lake, transforming facets?
:
« previous next »
Pages: [1] | Go Down Print
Author Topic: March 07, 2014 Clara Lake, transforming facets?  (Read 3874 times)
jtack
Member
Offline

Posts: 665


March 07, 2014 Clara Lake, transforming facets?
« on: 03/07/14, 09:47 PM »

I dug a pit to the ground today, ~1.5m on an east, north east slope at 6000 feet, and where two weeks ago in the same area I found 15+ cm of facets, I found none.  I would not put too much stock in this yet, but it was an encouraging sign. I did not think the snow would have warmed up that much.  Ill try and check a north aspect if I get the time in the next few days.

« Last Edit: 03/11/14, 09:36 AM by jtack » Logged
mikerolfs
Member
Offline

Posts: 796


WWW
Re: March 07, 2014 Clara Lake, melting facets?
« Reply #1 on: 03/07/14, 10:09 PM »

Hooray hoorah. I hope there is something to this!
Logged
rlsg
Member
Offline

Posts: 516


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #2 on: 03/08/14, 05:29 PM »

Spooky pile of facets--fingers crossed for ET Meta in full force!!
Logged
mikerolfs
Member
Offline

Posts: 796


WWW
Re: March 07, 2014 Clara Lake, melting facets?
« Reply #3 on: 03/08/14, 05:52 PM »

I dug a pit today to the ground on a north facing slope and did not find any improvement in the lower layer.  Failure of a 150cm column at the ground on the thirteenth tap.  The lowest 40cm were the same no strength crap we have seen elsewhere.  I'll post a video later.  For now, my opinion is that the rain and warm weather have not erased the deep problem in the Wenatchee area.
Logged
mikerolfs
Member
Offline

Posts: 796


WWW
Re: March 07, 2014 Clara Lake, melting facets?
« Reply #4 on: 03/09/14, 05:32 PM »

Here it is.  Not super exciting, but it is interesting that a 150cm column would fail at the ground on tap #13. 

http://youtu.be/8uoQFNlmYY0

This was my first day on my new Alien boots.  I drove home in them just because I could.  Couple seconds of the video in honor of the "sneaker" function of these boots.
Logged
Oyvind_Henningsen
Member
Offline

Posts: 324


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #5 on: 03/09/14, 06:12 PM »

i see you use the same facet taste test as i do ;-)  pretty worrisome layer down deep, thank you for the information
Logged

Lytt til erfarne fjellfolk!
mikerolfs
Member
Offline

Posts: 796


WWW
Re: March 07, 2014 Clara Lake, melting facets?
« Reply #6 on: 03/09/14, 06:46 PM »

facet taste test

Smiley
Logged
Jerry
5Member
Offline

Posts: 16


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #7 on: 03/09/14, 09:16 PM »

Interesting result on the compression test, but it seems a little tall for column height.  This could have skewed the result from the effects of leverage on the weak layer.  In general, I think CT should have column height less than 1m.  You might try a deep tap test or PST on the layer instead.  Just a thought.....
Logged
rlsg
Member
Offline

Posts: 516


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #8 on: 03/10/14, 05:56 PM »

Wouldn't that be through "sublimation" rather than the actual melting of the facets (do to the decrease of temperature gradient, therefore reversing the process and so leaning toward equi-temperture metamorphism--and so less tg process and more et?
Logged
rlsg
Member
Offline

Posts: 516


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #9 on: 03/10/14, 06:01 PM »

Sorry---not trying to be a pain, just a little old school and so trying to put newish terms into context..for example.... isn't depth hoar an advanced form of faceting...I read quite often "facets", and "depth" hoar in the same sentence...and it seems like the writer is suggesting that they are different...

I was definitely not an English major...
Logged
mikerolfs
Member
Offline

Posts: 796


WWW
Re: March 07, 2014 Clara Lake, melting facets?
« Reply #10 on: 03/10/14, 07:15 PM »

I don't know any of the technical stuff but the point is that the deep weak layer on the ground, which earlier in this thread was maybe being suggested as improving, is still a potential problem.  At least in that one spot where I chose to go looking for it.
Logged
jtack
Member
Offline

Posts: 665


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #11 on: 03/11/14, 09:37 AM »

Wouldn't that be through "sublimation" rather than the actual melting of the facets (do to the decrease of temperature gradient, therefore reversing the process and so leaning toward equi-temperture metamorphism--and so less tg process and more et?


Noted, and changed.
Logged
freeski
Member
Offline

Posts: 531


Re: March 07, 2014 Clara Lake, melting facets?
« Reply #12 on: 03/16/14, 07:40 PM »

I don't know any of the technical stuff but the point is that the deep weak layer on the ground, which earlier in this thread was maybe being suggested as improving, is still a potential problem.  At least in that one spot where I chose to go looking for it.
thanks for pointing that out. Imo, skiers jump at any reports of stability as a go. Often in avy reports we hear that the group saw no signs of instability up to the point of trigger. Should we really give our opinions of stability or just focus on instability observations and concerns? 
Logged

"I'm not making love to anyones wishes, only for that light I see." Cat Stevens
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
Contact turns-all-year.com

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.