Description: Image shows the hourly-averaged ozone concentration over the western contiguous U.S. during the last 31 days. Forecast hours are shown along the x-axis. The gray dashed line is the observed mean, while the solid black line and solid red line are raw AQM forecast and bias-corrected AQM forecast from 12Z runs, respectively. The closer that the forecast mean value is to the observed mean value, the more accurate the ozone concentration forecast was.



Description: Similar to the first image, except for the central contiguous U.S. during the last 31 days.



Description: Similar to the first image, except for the eastern contiguous U.S. during the last 31 days.



Description: Similar to the first image, except for the southern contiguous U.S. during the last 31 days.