Who We Are

Walter Rosenthal
Honorary President

Nate Greenberg
Vice President

Walter Rosenthal was the Snow and Avalanche Analyst for Mammoth Mountain, a remote sensing expert for the U.S. Army Cold Regions Research and Engineering Laboratory and a researcher at the
Nate Greenberg has called the Eastside his home since 2000. Drawn here by the acess to amazing terrain and quality of skiing, he has spend a considerable amount of time exploring the snowy Sierra.

Institute of Computational Earth System Science, University of California, Santa Barbara. He specialized in remote sensing of snow and snowpack processes related to sintering and avalanches. As a private consultant he provided operational subresolution snow mapping algorithms and programs to the U.S. Army Cold Regions Research and Engineering Laboratory from 1995 through 2002. Both the Army and the National Weather Service’s National Operational Hydrologic Remote Sensing Center employ his algorithms and are expanding their use to daily operational snow cover maps over North America.

Walter tragically lost his life while trying to save the lives of others in 2005. He was a vital force in teh development of the Center and will be dearly missed by us all.

Nate is AAA Level III trainied and has worked as a NOLS instructor for climbing and mountaineering. A former competitive telemark skier, Nate now enjoys getting into the backcountry with friends and family.

His interest in disseminating quality information to the general public helps motivate ESAC. Nate spends a great deal of time on the Center's website, and helps coordinate the overall operations of the Center.

Howie Schwartz
Secretary

 

Robert 'SP' Parker
Treasurer

Howie Schwartz is an AMGA/IFMGA certified ski and mountain guide based in Big Pine, California. Howie guides skiing and mountain climbing trips year round in the Sierra Nevada, the Alps, Alaska and other destinations. He is an instructor/examiner for the American Mountain Guides Although originally from New Zealand, SP Parker has been a resident of the Eastern Sierra since 1980. He is a full time professional guide leading trips from Alaska to Patagonia but always returning to the Sierra Nevada which he believes are some of the funnest mountains anywhere. He is certified in rock, alpine

Association and is on the AMGA Technical Committee. He was a founding member of the American Institute for Avalanche Research and Education and leads AIARE level 1-3 avalanche courses. Howie also trains AIARE instructors. Howie’s skiing relationship with the Sierra started in the spring of 1996 on a basecamp ski trip near Virginia Lakes. Since that time, this love affair has all but ruined his otherwise productive professional life. Howie has still not figured out what “Sierra Cement” is, but he has heard some can be found up near Lake Tahoe.

and ski disciplines by the American Mountain Guides Association and is an internationally certified IFMGA guide. As part of his guiding work he teaches avalanche courses as an AIARE level instructor in the Sierra Nevada. Avalanche assessment is a daily part of a guide's job and the snowy months find SP out in the mountains on day trips or long trans-Sierra tours digging pits in the snow and evaluating the potential for snow instabilities.

 

Sue Burak
Avalanche Forecaster

Allan Pietrasanta
Director


Sue Burak enjoys big winters. Sue's very first avalanche forecasting job was during the winter of 1982-83. Working many years as a state snow surveyor provided ample opportunities to refine route finding skills and avalanche awareness. Lately, winters find her

It was almost 25 years ago that Allan Pietrasanta realized the need for an easier to use, more protective case for his Pieps avalanche beacon. The standard yellow thin cloth bag and shoestring necklace just wasn’t cutting it, so he created high-tech padded pouches that he

stressing over avalanche conditions above the community of Aspendell where she has been the avalanche forecaster for Inyo County since 1998. She learned about snowpack energy balance as a modeler for a NASA Antarctica project and developed model input criteria for a physically based snow process model. After the persistent depth hoar layer of 2004-2005, she was inspired to finish writing a research paper on eastern Sierra avalanche climatology.

was able to use in trade for payment to complete one the first avalanche courses taught in Mammoth. While the beacon case project helped increase his avalanche awareness, it was also the roots of a sewing manufacturing company, ABCOM/Buttermilk Mountain Works, that Allan owned and operated for over two decades in Bishop. Allan has left ski tracks in the High Sierra and other mountain ranges of the world, and continues to celebrate the joys of backcountry skiing and its contributions to world piste. He combines his interest in business, his past experience as a mountain guide and early Board member of the American Mountain Guides Association to help ensure a bright future for ESAC.

Forrest Cross
Membership Director

Bob Harrington
Director
 
Forrest Cross has been visiting the Eastern Sierra for almost 10 years and has lived here for the last 5 years. One of the main reasons he lives here is for the  
endless backcountry skiing opportunities during the winter months. For the last 15 years he has been backcountry skiing in the mountains of Northern California and the Sierra. He has completed a level 2 AIARE course and has taught avalanche awareness to guides for Outdoor Adventures at UC Davis. When not playing in the hills, Forrest works as an engineer for the Mammoth Community Water District and helps monitor all the runoff that the winter snows produce. Forrest enjoys being involved with ESAC and helping to spread the word of avalanche safety in the Eastern Sierra. As Membership Director he keeps tabs on membership numbers and maintains the member email list-serve.  
Scott Quirsfeld
Director
   
   
   
ESAC Documents
Non-Profit Articles of Incorporation, 2005
ESAC Bylaws
   
Background Information
Draft Business Plan (ESAC)
  
 

 

Board of Director's Meeting Minutes
BOD Meeting #1
April 24, 2005 - 6:30pm - Swall Meadows
BOD Meeting #2
June 26, 2005 - 6:00pm - Sunny Slopes
BOD Meeting #3
September 5, 2005 - 6:30pm
Mammoth Lakes
BOD Meeting #4
October 18, 2005 - 6:30pm
Mammoth Lakes, USFS
BOD Meeting #5
November 16, 2005 - 6:30pm
Sunny Slopes
BOD Meeting #6
December 7, 2005 - 6:00pm
Big Pine

BOD Meeting #7
February 24, 2006 - 6:00pm
Tom's Place

BOD Meeting #11
November 11, 2006
Bishop

   
   
2004 Planning Team Meeting Minutes
September 15, 2004 - 6:30pm - INF Conf. Rm.
August 11, 2004 - 6:30pm - INF Conf. Room
July 23, 2004 - 6:30pm - INF Visitor Ctr.

Getting Involved
If you are interested in getting involved, please contact us.
 
ESAC Background

10 years ago or so, the Eastern Sierra had a formal avalanche center that was run by the Forest Service. Several staff participated in observations through which avalanche forecasts were derived.

Since that time, a formalized avalanche center has not existed for this region of the Sierra. The Bardini Foundation in cooperation with the Cyberspace Snow and Avalanche Center put out observations via the Internet, and SierraBackcountry.org maintains a forum where users can post up-to-date avalanche conditions. While both these provided a basic picture of what was happening out there, they fell short of a formal advisory or forecast that could be used for solid decision making throughout the region.

Given the avalanche conditions that presented themselves at the end of last season, and so far this season, the timing is right-on. Though we were not ableto get all the funding intricacies worked out for the 2004/2005 season, we are expecting to have things up and running for the 2005/2006 season.

Eastern Sierra Avalanche Center
PO Box 1505
Mammoth Lakes, Ca 93546
Office@ESAvalanche.org

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Copyright - Eastern Sierra Avalanche Center, 2005
In partnership with the Inyo National Forest