Rainfall data measured and transmitted in near real-time are available from two sites, operated by the U.S. Geological Survey and co-funded by Loudoun County. One site is in Lovettsville and one north of Leesburg in Limestone Branch watershed. View an interactive map of the area. Because data from these stations are available in near real-time, the information is helpful to the county's Erosion and Sediment Control team and others to warn of potential problems based on the amount of rain.
Data collected from the monitoring stations are analyzed and the results presented in various ways to gain a better understanding of both recent and past precipitation characteristics and potential trends. Graphs showing long-term annual precipitation and average monthly precipitation in Loudoun County have been developed from the available data.
Learn more about precipitation data and analyses.