This is just a quick 'heads up' about Oregon U.S Senator and Democrat Ron Wyden and his efforts to promote wind energy in the Northwest.
A recent article in Power Engineering Magazine indicates Wyden's position that current military radar systems and their limitations are interfering with wind energy development in Eastern Oregon and Washington.
The article describes Wyden's letter to the Department of Defense and the Federal Aviation Administration indicating that current radar systems are preventing the installation of up to 4000 megawatts of proposed wind electrical generation capacity in the two states.
I could not find the May 21 Wyden letter mentioned in the PE article at Wyden's website
The trend of increasing height and size of planned wind turbines that the National Renewable Energy Laboratory recently identified undoubtedly plays a role in the present problems since higher/larger turbines will likely have a more pronouced interference with radar systems.
Updating of such radar would probably mean that the radar imaging systems would probably have to have the capability of eliminating radar image returns from known wind turbine locations.