A new report from the National Weather Service says that wind farms have some unfortunate negative impacts on the ability of Doppler radar to track storms.
“Wind farms affect … radars in several ways; first, the turbines can block a significant percentage of the radar beam and decrease the radar signal power down range of the wind farm, particularly if the wind farm is within a few miles of the radar. Second, the wind farm can reflect energy back to the radar system and this appears as clutter or false reflectivity data. This reflectivity can create false precipitation estimates and disrupt precipitation algorithms used by the radar and other software programs. Finally, wind farms can significantly influence velocity and spectrum width data, which can cause bad data sampling of rotating storms and false storm motions, along with impacting algorithms used by the radar to process this data. Since the wind turbines have motion and produce reflectivity, schemes designed to filter out the clutter do not work properly.”
For full story see WUWT here.
The article provides an explanation of Doppler radar theory and several case histories of wind farms interfering with radar operation and interpretation of signals. This puts people in danger.
Wind farms result in reduction of data quality. “Meteorologists have noticed impacts to reflectivity, velocity, storm relative motion, and precipitation estimate data with radar located within 30 nm of a wind farm.” False signals from wind farms limit the ability of forecasters to provide more accurate warnings, especially during widespread storm events.