Mean front intensity and wind speed with respect to the rate of water level variation. Top row: mean front intensity and frequency of events. Middle row: mean wind speed and means of absolute value of east-west and north-south wind components. Bottom row: proportions of front intensities identified (a) for all wind conditions, (b) for east and west winds, (c) for north and south winds, and (d) for east and west winds below 2 m/s. Class “0.1 m/hour” is for the range of 0.0 m/hour to 0.1 m/hour and “−0.1 m/hour” for −0.1 m/hour to 0.0 m/hour.