NOAA Letter regarding NEXRAD impacts

Kathryn D. Sullivan Ph.D., Undersecretary of Commerce for Oceans and Atmosphere, sent this response to Nebraska Senator Deb Fischer after Senator Fischer contacted NOAA with concerns pertaining to NextEra's proposed Cottonwood wind energy facility which would site dozens of wind turbines within 2-7 miles of the NEXRAD weather radar in Blue Hill, Nebraska. Senator Fischer's constituents contacted her out of concern for their safety if the weather radar was impaired by the turbines. The letter sent by Dr. Sullivan is provided below and can be accessed by clicking the link on this page. Senator Fischer's letter is also available from this page.

The Honorable Deb Fischer
United States Senate
Washington, DA 20515-2708

Dear Senator Fischer:

Thank you for your letter sharing your constituents' concerns regarding the potential impacts of NextEra's proposed Cottonwood Wind Project on the National Oceanic and Atmospheric Administration's (NOAA) Doppler weather radar near Blue Hill, Nebraska.

Last summer, NOAA's Radar Operations Center (ROC) evaluated the project for potential impacts. The RPC began working with NextEra representatives in August 2014 to develop a mitigation strategy. On November 24, 2014, NextEra and the local Weather Forecast Office (WFO) in Hastings, Nebraska, signed a Letter of Intent (voluntary agreement) to curtail wind farm operations at the discretion of local forecasters during certain severe weather scenarios. Curtailing turbine operation which stops the rotation of the turbine blades eliminates interference to NOAA's weather radar. NextEra and NOAA intend to make a public announcement by the end of January 2014 now that the agreement is in place. NextEra has also agreed to have its full-time wind farm operators trained by the WFO to be storm spotters. In addition, we are working with NextEra to implement a data sharing agreement in which NextEra provides supplemental weather observations from the Cottonwood Project to the WFO for forecast operations.

NOAA, through the WFO, began an outreach program to the local community in September 2014. We provided information on impacts to radar data and potential mitigation strategies to the media, emergency managers, and the public through webinars, conference calls, interviews, and attendance at public forums. The WFO will continue outreach efforts prior to the start of the severe weather season this spring.

NOAA's forecasters, including those in the Midwest, have been very successful in mitigating wind farm interference of radar data during severe weather operations since 2008. While we are concerned with any interference on our radars, we believe the mitigation strategy and forecaster training will reduce impacts and ensure that the Cottonwood project is not a threat to the integrity of NOSS's forecast and warning operations.

NOAA will continue to work closely with the wind energy industry to ensure that NOAA is able to deliver its mission of timely and accurate weather forecasts and warnings that protect lives and property. I appreciate your interest in this matter.

If you have any questions, please contact Amanda Hallberg Greenwell, Director of NOAA's Office of Legislative and intergovernmental Affairs, at (202) 482-4981.


Kathryn D. Sullivan Ph.D.

Undersecretary of Commerce for Oceans and Atmosphere

Noaa Response To Sen Fischer Cottonwood Wf Signed 5 Jan15

Download file (74 KB) pdf

Senator Fischer Letter To Administrator Sullivan

Download file (245 KB) pdf

JAN 5 2015
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