HPRCC Personnel


Natalie Umphlett

Interim Director. 2016.
Regional Climatologist. 2008.

Phone: (402) 472-6764
Fax: (402) 472-2946
email: Contact Natalie

B.S. University of Nebraska-Lincoln
M.S. University of Nebraska-Lincoln

Ms. Umphlett has served as interim director of the HPRCC since January 2016, administering HPRCC grants, providing guidance on Center projects and activities, coordinating with the NOAA Regional Climate Centers, and supervising Center personnel. Additionally, in her role as regional climatologist, she serves as the climate services manager and public liaison for the Center, working closely with stakeholders and partners from across the region on climate monitoring for enhanced decision making. She is also serving a three-year term on the American Meteorological Society’s Committee on Applied Climatology. In her spare time, Ms. Umphlett is pursuing a PhD in Natural Resource Sciences with a specialization in Climate Assessment and Impacts here at UNL.

William Sorensen

Senior Applications/Systems Programmer. 1995.

Phone: (402) 472-8767
Fax: (402) 472-2946
email: Contact Bill

B.S. University of Nebraska-Lincoln

Mr. Sorensen is responsible for development and maintenance of software for acquiring, managing, and distributing climate data. He is also involved in development of climate applications and is the HPRCC's representative on the software development team for the Applied Climate Information System project.

Shellie Hanneman

Data Quality Technician. 1994.

Phone: (402) 472-6709
Fax: (402) 472-2946
email: Contact Shellie

Mrs. Hanneman is responsible for QC monitoring of the incoming data, assistance in preparation of data requests, data entry, and the retrieval of climate information.

Jamie Lahowetz

AWDN Manager. 2011.

Phone: (402) 472-6786
Fax: (402) 472-2946
email: Contact Jamie

B.S. University of Nebraska-Lincoln

Mr. Lahowetz is responsible for the management and development of the Automated Weather Data Network. Many of his tasks include addition and removal of new stations, maintenance of storage and retrieval system, and corrections to current data archive. Mr. Lahowetz stays in contact with state mesonets in order to keep data and specifics of stations up-to-date.


Crystal J. Stiles, Ph.D.

Applied Climatologist/Assistant Geoscientist. 2017
Postdoctoral Research Associate. 2014-2017

Phone: (402) 472-8208
Fax: (402) 472-2946
email: Contact Crystal

B.S. Western Kentucky University
M.S. Western Kentucky University
Ph.D. University of Nebraska-Lincoln

Dr. Stiles directs the HPRCC's stakeholder engagement program for the High Plains region and surrounding areas. She coordinates with regional climate partners, evaluates climate data and information needs for stakeholders in the region, identifies and exercises opportunities to grow awareness and use of HPRCC's climate data and information, and provides expertise and assistance on National Integrated Drought Information System (NIDIS) projects related to Drought Early Warning Systems. In particular, Dr. Stiles has engaged with several Native American tribes in the High Plains region on capacity-building projects that use climate information to enhance on-reservation decision making.


Warren Pettee

Applications Programmer. 2017.

Phone: (402) 472-8885
Fax: (402) 472-2946
email: Contact Warren

B.S. University of North Carolina at Charlotte

Mr. Pettee develops new products for end-users in both the web front-end and by developing server-side software solutions. He works with HPRCC staff to turn research and stakeholder needs into modern tools for end-users. He is also completing his M.S. degree from the University of North Carolina at Charlotte in his spare time.

Emily Brown

Intern. 2017.

Phone: (402) 472-4122
Fax: (402) 472-2946
email: Contact Emily

Emily is responsible for aiding technical and research staff members in various projects. This includes applied climate research, data processing, and web development. She is also responsible for the preparation of data requests and the retrieval of climate information.

Disclaimer on the Use of Data and Products from the HPRCC

Climate products and tools are developed by the HPRCC and its partner Regional Climate Centers to provide users with a means to routinely access recent weather and climate data. While applied research has demonstrated that the use of such data in decision making can reduce risk and lower a user's cost, it must be pointed out that near-real-time data are preliminary in nature and sometimes contain errors. Although care is taken to remove known errors, it is possible that some data will change after receipt of written records and final quality control steps. Users are therefore forewarned to consider any negative impact that errant data might have on their business and use preliminary data and information at their own risk.

The HPRCC is not responsible for the misuse or abuse of data provided through our services, both online and full-service.

Through use of the data services through the HPRCC website, you automatically agree to the terms of use and disclaimer.