Storm Water Projects
Drainage & Flooding
Pollution Prevention
Fees & Billing
Storm Water A-Z
Print this PageSite Feedback
Rainfall Data
The U.S. Geological Survey (USGS) and Storm Water Services operate a network of 73 rain and 51 stream gauges throughout Charlotte-Mecklenburg. The hydrologic data helps track rainfall trends and flood heights.

Rain and Stream Gauges

Many of the rain gauges are on the rooftops of public schools or government buildings around Charlotte-Mecklenburg. When it rains, data is transmitted from the rain gauges to base stations located at USGS and the Charlotte-Mecklenburg Government Center.                                                                                                                                                               
How rain gauges work  

DIAD screen shot
OneRain DIADvisor map shows rainfall in Charlotte-Mecklenburg.
Rain gauge data is then relayed to additional computer base stations located on the City/County Wide Area Network. The base stations use a software package called DiadVisor, manufactured by OneRain. The software keeps track of all the data coming in and organizes it by time. 

Rain gauge data is also sent to the Interactive Mapping Site where you can view rainfall data collected at each of the gauges.                                                             

Stream gauges are located in creeks and measure the depth of water at key locations such as bridges. 

If it rains very hard or creeks rise rapidly, specially selected rain and stream gauges that make up the FINS network automatically notify emergency responders of the likelihood of flooding.

For more information, please contact Samantha Willis at 704-336-5780 or Josh McSwain at 980-314-3214​.