Resultant wind direction values are obtained by converting the 5-minute wind speeds and directions for the hour into a single hourly vector. Resultant wind direction is the direction of this vector. Wind direction, the direction from which the wind is blowing, is measured to the nearest degree based on a 360 degree compass with 0 or 360 degrees being from the North and 180 degrees being from the South.
Use the controls below to select a different date or parameter. Click on the Generate Report button once you have made your selections.Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
PLEASE NOTE: This data has not been verified by the Virginia DEQ and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from Virginia DEQ ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.