In contrast, distinct power curves emerged when the power **data** were stratified by SODAR measured Figure 6. I w -stratified power curves for Turbine 1 during strongly convective (I w > 17%), convective (9% < I w < 17%), and stable or strongly stable (I w < 6%) conditions, as well as the expected power curve. Under-performance is observed during strongly convective conditions, especially for higher wind speeds. I U (figure 5(b)). Figure 5(b) shows power generation **data** segregated into stable or strongly stable (I U < 10%), convective (13% I U < 20%), or strongly convective (I U > 20%) conditions. The most significant power curve differences occurred between very stable/stable and very convective conditions for wind speeds 7.0-8.5 m s −1 . In general, Turbine 1 over-performed during stable/strongly stable conditions for 5.5-8 m s −1 wind speeds and under-performed during strongly convective conditions for all wind speeds above 5.5 m s −1 . Greatest under-performance occurred at moderate wind speeds (7.0-8.5 m s −1 ) during strongly convective conditions. For example, for a wind speed of 7.5 m s −1 , mean P norm was 40% ± 6% during strongly stable/stable conditions and 23% ± 4% during strongly convective conditions, compared to the expected P norm of 33%. Among all six turbines examined, differences in normalized power between stable/strongly stable (more power) and strongly convective (less power) conditions ranged from 10 to 20%.