Empirical relationships among wind conditions and ozone exceedances in Houston and other cities in Texas: Quadrant Data

Supporting data for manuscript "Empirical relationships among wind conditions and ozone exceedances in Houston and other cities in Texas". The data shows for 2012 and 2015 for monitors in Houston the number of compass quadrants (1Q-4Q) traversed by the wind direction during a 24-hour period. Also shown are the number of days for each quadrant with no exceedances (0X), a one-hour exceedance (1X) greater than 100 ppb, 8-hour average exceedance (8X) greater than 70 ppb or has a one-hour and eight-hour exceedance (9X).