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.
11/24/17, 03:24 AM

Become a TAY Sponsor!
 
Trip Reports Sponsor
American Alpine Institute
American Alpine Institute
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
|-+  Hot Air
| |-+  Weak Layers: decision making in avalanche terrain
| | |-+  January 30 slide on Tumalo, central Oregon
:
« previous next »
Pages: [1] | Go Down Print
Author Topic: January 30 slide on Tumalo, central Oregon  (Read 3905 times)
Charlie Hagedorn
Member
Offline

Posts: 1823


WWW
January 30 slide on Tumalo, central Oregon
« on: 02/09/16, 10:26 AM »

Interesting both because it's PNW, and because of the implications of increased backcountry usage.

Tap does a nice job of aggregating the reports here:

http://www.tetongravity.com/forums/showthread.php/299755-Avy-on-Tumalo-Central-Oregon-Partial-Burial-Info-and-backstory
Logged

natefred
Member
Offline

Posts: 132


Re: January 30 slide on Tumalo, central Oregon
« Reply #1 on: 02/10/16, 10:38 AM »

For perspective, Tumalo is the lowest of the very limited low hanging fruit accessed without a snowmobile around here. The bowl is about 600' vert (unless you run it way out into low angle trees) and if people are skiing it (which is just about any time visibility and conditions are OK) there are almost always people at the bottom transitioning in the runout zone.

My opinion and observation on skiing Tumalo is that if you've deemed any part of the slope OK for skiing and are transitioning at the bottom of it, you have to fully expect someone may ski down any line on the slope while you are transitioning.

99% of skiers there transition where a slide could easily reach them. I am not sure how many realize it is a calculated risk. The group this happened to sounds like they are in the process of realizing it's tough to guess how far a slide will go. Almost no one runs it out into the relative safety of the little trees which would probably be a lot bigger if it were true that Tumalo never slides big.

The part of the slope that slid has a convex roll at the top, gets tons of wind transport, and links between the two rock bands. It's one of the most likely areas to slide as the report indicates. It is also one of the less intimidating entry points because it doesn't usually have a cornice, so it is often someone's pick for their first lap. Don't transition under it in marginal conditions, it could get triggered or go on its own. Transition further skier's left closer to the ascent rib or down in the flats.

In my opinion entering between the rock and cornice in the upper right of the picture (high point at the west end of the ridge) and staying skier's left of the rocks is the best way to test the slope, with escape towards the wind-stripped ascent rib to skier's left once you've cleared any wind loading below the cornice. I can't tell where this group skied from the report's description. It sort of sounds like they skied the part of the slope that slid and that they knew was suspect, but that just doesn't make sense.

Logged
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.