Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

Visit https://www.weather.gov/owp/operations for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

View the Enhanced Operating Capability Products and Services StoryMap here



Hydrograph River at a Glance Download
South Branch Potomac River near Petersburg Stage (ft)Flow (kcfs)Observed: 4.47 ft at 12:00PM Mar 17, 2023Observed: 4.48 ft at 12:15PM Mar 17, 2023Observed: 4.47 ft at 12:30PM Mar 17, 2023Observed: 4.48 ft at 12:45PM Mar 17, 2023Observed: 4.48 ft at 1:00PM Mar 17, 2023Observed: 4.48 ft at 1:15PM Mar 17, 2023Observed: 4.49 ft at 1:30PM Mar 17, 2023Observed: 4.49 ft at 1:45PM Mar 17, 2023Observed: 4.49 ft at 2:00PM Mar 17, 2023Observed: 4.5 ft at 2:15PM Mar 17, 2023Observed: 4.5 ft at 2:30PM Mar 17, 2023Observed: 4.5 ft at 2:45PM Mar 17, 2023Observed: 4.5 ft at 3:00PM Mar 17, 2023Observed: 4.5 ft at 3:15PM Mar 17, 2023Observed: 4.5 ft at 3:30PM Mar 17, 2023Observed: 4.5 ft at 3:45PM Mar 17, 2023Observed: 4.5 ft at 4:00PM Mar 17, 2023Observed: 4.5 ft at 4:15PM Mar 17, 2023Observed: 4.51 ft at 4:30PM Mar 17, 2023Observed: 4.51 ft at 4:45PM Mar 17, 2023Observed: 4.51 ft at 5:00PM Mar 17, 2023Observed: 4.51 ft at 5:15PM Mar 17, 2023Observed: 4.52 ft at 5:30PM Mar 17, 2023Observed: 4.51 ft at 5:45PM Mar 17, 2023Observed: 4.51 ft at 6:00PM Mar 17, 2023Observed: 4.51 ft at 6:15PM Mar 17, 2023Observed: 4.51 ft at 6:30PM Mar 17, 2023Observed: 4.51 ft at 6:45PM Mar 17, 2023Observed: 4.52 ft at 7:00PM Mar 17, 2023Observed: 4.52 ft at 7:15PM Mar 17, 2023Observed: 4.52 ft at 7:30PM Mar 17, 2023Observed: 4.52 ft at 7:45PM Mar 17, 2023Observed: 4.52 ft at 8:00PM Mar 17, 2023Observed: 4.52 ft at 8:15PM Mar 17, 2023Observed: 4.52 ft at 8:30PM Mar 17, 2023Observed: 4.52 ft at 8:45PM Mar 17, 2023Observed: 4.53 ft at 9:00PM Mar 17, 2023Observed: 4.53 ft at 9:15PM Mar 17, 2023Observed: 4.53 ft at 9:30PM Mar 17, 2023Observed: 4.54 ft at 9:45PM Mar 17, 2023Observed: 4.53 ft at 10:00PM Mar 17, 2023Observed: 4.54 ft at 10:15PM Mar 17, 2023Observed: 4.53 ft at 10:30PM Mar 17, 2023Observed: 4.53 ft at 10:45PM Mar 17, 2023Observed: 4.53 ft at 11:00PM Mar 17, 2023Observed: 4.53 ft at 11:15PM Mar 17, 2023Observed: 4.53 ft at 11:30PM Mar 17, 2023Observed: 4.54 ft at 11:45PM Mar 17, 2023Observed: 4.54 ft at 12:00AM Mar 18, 2023Observed: 4.53 ft at 12:15AM Mar 18, 2023Observed: 4.54 ft at 12:30AM Mar 18, 2023Observed: 4.54 ft at 12:45AM Mar 18, 2023Observed: 4.55 ft at 1:00AM Mar 18, 2023Observed: 4.55 ft at 1:15AM Mar 18, 2023Observed: 4.55 ft at 1:30AM Mar 18, 2023Observed: 4.55 ft at 1:45AM Mar 18, 2023Observed: 4.55 ft at 2:00AM Mar 18, 2023Observed: 4.56 ft at 2:15AM Mar 18, 2023Observed: 4.55 ft at 2:30AM Mar 18, 2023Observed: 4.56 ft at 2:45AM Mar 18, 2023Observed: 4.56 ft at 3:00AM Mar 18, 2023Observed: 4.56 ft at 3:15AM Mar 18, 2023Observed: 4.57 ft at 3:30AM Mar 18, 2023Observed: 4.57 ft at 3:45AM Mar 18, 2023Observed: 4.58 ft at 4:00AM Mar 18, 2023Observed: 4.58 ft at 4:15AM Mar 18, 2023Observed: 4.57 ft at 4:30AM Mar 18, 2023Observed: 4.59 ft at 4:45AM Mar 18, 2023Observed: 4.59 ft at 5:00AM Mar 18, 2023Observed: 4.59 ft at 5:15AM Mar 18, 2023Observed: 4.6 ft at 5:30AM Mar 18, 2023Observed: 4.6 ft at 5:45AM Mar 18, 2023Observed: 4.61 ft at 6:00AM Mar 18, 2023Observed: 4.62 ft at 6:15AM Mar 18, 2023Observed: 4.63 ft at 6:30AM Mar 18, 2023Observed: 4.63 ft at 6:45AM Mar 18, 2023Observed: 4.64 ft at 7:00AM Mar 18, 2023Observed: 4.64 ft at 7:15AM Mar 18, 2023Observed: 4.66 ft at 7:30AM Mar 18, 2023Observed: 4.67 ft at 7:45AM Mar 18, 2023Observed: 4.68 ft at 8:00AM Mar 18, 2023Observed: 4.69 ft at 8:15AM Mar 18, 2023Observed: 4.69 ft at 8:30AM Mar 18, 2023Observed: 4.7 ft at 8:45AM Mar 18, 2023Observed: 4.72 ft at 9:00AM Mar 18, 2023Observed: 4.72 ft at 9:15AM Mar 18, 2023Observed: 4.73 ft at 9:30AM Mar 18, 2023Observed: 4.73 ft at 9:45AM Mar 18, 2023Observed: 4.74 ft at 10:00AM Mar 18, 2023Observed: 4.75 ft at 10:15AM Mar 18, 2023Observed: 4.76 ft at 10:30AM Mar 18, 2023Observed: 4.75 ft at 10:45AM Mar 18, 2023Observed: 4.76 ft at 11:00AM Mar 18, 2023Observed: 4.77 ft at 11:15AM Mar 18, 2023Observed: 4.77 ft at 11:30AM Mar 18, 2023Observed: 4.77 ft at 11:45AM Mar 18, 2023Observed: 4.79 ft at 12:00PM Mar 18, 2023Observed: 4.78 ft at 12:15PM Mar 18, 2023Observed: 4.79 ft at 12:30PM Mar 18, 2023Observed: 4.8 ft at 12:45PM Mar 18, 2023Observed: 4.8 ft at 1:00PM Mar 18, 2023Observed: 4.8 ft at 1:15PM Mar 18, 2023Observed: 4.8 ft at 1:30PM Mar 18, 2023Observed: 4.81 ft at 1:45PM Mar 18, 2023Observed: 4.81 ft at 2:00PM Mar 18, 2023Observed: 4.81 ft at 2:15PM Mar 18, 2023Highest Observation: 4.82 ft at 2:30PM Mar 18, 2023Observed: 4.81 ft at 2:45PM Mar 18, 2023Observed: 4.81 ft at 3:00PM Mar 18, 2023Observed: 4.81 ft at 3:15PM Mar 18, 2023Highest Observation: 4.82 ft at 3:30PM Mar 18, 2023Highest Observation: 4.82 ft at 3:45PM Mar 18, 2023Highest Observation: 4.82 ft at 4:00PM Mar 18, 2023Highest Observation: 4.82 ft at 4:15PM Mar 18, 2023Highest Observation: 4.82 ft at 4:30PM Mar 18, 2023Highest Observation: 4.82 ft at 4:45PM Mar 18, 2023Observed: 4.81 ft at 5:00PM Mar 18, 2023Observed: 4.81 ft at 5:15PM Mar 18, 2023Observed: 4.81 ft at 5:30PM Mar 18, 2023Highest Observation: 4.82 ft at 5:45PM Mar 18, 2023Observed: 4.81 ft at 6:00PM Mar 18, 2023Observed: 4.8 ft at 6:15PM Mar 18, 2023Observed: 4.81 ft at 6:30PM Mar 18, 2023Observed: 4.81 ft at 6:45PM Mar 18, 2023Observed: 4.81 ft at 7:00PM Mar 18, 2023Observed: 4.8 ft at 7:15PM Mar 18, 2023Observed: 4.8 ft at 7:30PM Mar 18, 2023Observed: 4.81 ft at 7:45PM Mar 18, 2023Observed: 4.8 ft at 8:00PM Mar 18, 2023Observed: 4.79 ft at 8:15PM Mar 18, 2023Observed: 4.8 ft at 8:30PM Mar 18, 2023Observed: 4.8 ft at 8:45PM Mar 18, 2023Observed: 4.79 ft at 9:00PM Mar 18, 2023Observed: 4.8 ft at 9:15PM Mar 18, 2023Observed: 4.79 ft at 9:30PM Mar 18, 2023Observed: 4.79 ft at 9:45PM Mar 18, 2023Observed: 4.79 ft at 10:00PM Mar 18, 2023Observed: 4.79 ft at 10:15PM Mar 18, 2023Observed: 4.79 ft at 10:30PM Mar 18, 2023Observed: 4.79 ft at 10:45PM Mar 18, 2023Observed: 4.79 ft at 11:00PM Mar 18, 2023Observed: 4.79 ft at 11:15PM Mar 18, 2023Observed: 4.78 ft at 11:30PM Mar 18, 2023Observed: 4.79 ft at 11:45PM Mar 18, 2023Observed: 4.79 ft at 12:00AM Mar 19, 2023Observed: 4.79 ft at 12:15AM Mar 19, 2023Observed: 4.78 ft at 12:30AM Mar 19, 2023Observed: 4.79 ft at 12:45AM Mar 19, 2023Observed: 4.78 ft at 1:00AM Mar 19, 2023Observed: 4.78 ft at 1:15AM Mar 19, 2023Observed: 4.78 ft at 1:30AM Mar 19, 2023Observed: 4.78 ft at 1:45AM Mar 19, 2023Observed: 4.78 ft at 2:00AM Mar 19, 2023Observed: 4.78 ft at 2:15AM Mar 19, 2023Observed: 4.78 ft at 2:30AM Mar 19, 2023Observed: 4.78 ft at 2:45AM Mar 19, 2023Observed: 4.78 ft at 3:00AM Mar 19, 2023Observed: 4.79 ft at 3:15AM Mar 19, 2023Observed: 4.77 ft at 3:30AM Mar 19, 2023Observed: 4.77 ft at 3:45AM Mar 19, 2023Observed: 4.76 ft at 4:00AM Mar 19, 2023Observed: 4.77 ft at 4:15AM Mar 19, 2023Observed: 4.78 ft at 4:30AM Mar 19, 2023Observed: 4.77 ft at 4:45AM Mar 19, 2023Observed: 4.77 ft at 5:00AM Mar 19, 2023Observed: 4.77 ft at 5:15AM Mar 19, 2023Observed: 4.77 ft at 5:30AM Mar 19, 2023Observed: 4.77 ft at 5:45AM Mar 19, 2023Observed: 4.76 ft at 6:00AM Mar 19, 2023Observed: 4.76 ft at 6:15AM Mar 19, 2023Observed: 4.77 ft at 6:30AM Mar 19, 2023Observed: 4.76 ft at 6:45AM Mar 19, 2023Observed: 4.76 ft at 7:00AM Mar 19, 2023Observed: 4.76 ft at 7:15AM Mar 19, 2023Observed: 4.76 ft at 7:30AM Mar 19, 2023Observed: 4.75 ft at 7:45AM Mar 19, 2023Observed: 4.76 ft at 8:00AM Mar 19, 2023Observed: 4.75 ft at 8:15AM Mar 19, 2023Observed: 4.76 ft at 8:30AM Mar 19, 2023Observed: 4.76 ft at 8:45AM Mar 19, 2023Observed: 4.76 ft at 9:00AM Mar 19, 2023Observed: 4.76 ft at 9:15AM Mar 19, 2023Observed: 4.76 ft at 9:30AM Mar 19, 2023Observed: 4.76 ft at 9:45AM Mar 19, 2023Observed: 4.76 ft at 10:00AM Mar 19, 2023Observed: 4.76 ft at 10:15AM Mar 19, 2023Observed: 4.76 ft at 10:30AM Mar 19, 2023Observed: 4.75 ft at 10:45AM Mar 19, 2023Observed: 4.76 ft at 11:00AM Mar 19, 2023Observed: 4.76 ft at 11:15AM Mar 19, 2023Observed: 4.75 ft at 11:30AM Mar 19, 2023Observed: 4.75 ft at 11:45AM Mar 19, 2023Observed: 4.75 ft at 12:00PM Mar 19, 2023Observed: 4.75 ft at 12:15PM Mar 19, 2023Observed: 4.75 ft at 12:30PM Mar 19, 2023Observed: 4.75 ft at 12:45PM Mar 19, 2023Observed: 4.75 ft at 1:00PM Mar 19, 2023Observed: 4.75 ft at 1:15PM Mar 19, 2023Observed: 4.76 ft at 1:30PM Mar 19, 2023Observed: 4.75 ft at 1:45PM Mar 19, 2023Observed: 4.75 ft at 2:00PM Mar 19, 2023Observed: 4.75 ft at 2:15PM Mar 19, 2023Observed: 4.74 ft at 2:30PM Mar 19, 2023Observed: 4.74 ft at 2:45PM Mar 19, 2023Observed: 4.74 ft at 3:00PM Mar 19, 2023Observed: 4.74 ft at 3:15PM Mar 19, 2023Observed: 4.74 ft at 3:30PM Mar 19, 2023Observed: 4.74 ft at 3:45PM Mar 19, 2023Observed: 4.74 ft at 4:00PM Mar 19, 2023Observed: 4.74 ft at 4:15PM Mar 19, 2023Observed: 4.73 ft at 4:30PM Mar 19, 2023Observed: 4.74 ft at 4:45PM Mar 19, 2023Observed: 4.73 ft at 5:00PM Mar 19, 2023Observed: 4.74 ft at 5:15PM Mar 19, 2023Observed: 4.74 ft at 5:30PM Mar 19, 2023Observed: 4.74 ft at 5:45PM Mar 19, 2023Observed: 4.74 ft at 6:00PM Mar 19, 2023Observed: 4.72 ft at 6:15PM Mar 19, 2023Observed: 4.73 ft at 6:30PM Mar 19, 2023Observed: 4.73 ft at 6:45PM Mar 19, 2023Observed: 4.73 ft at 7:00PM Mar 19, 2023Observed: 4.72 ft at 7:15PM Mar 19, 2023Observed: 4.72 ft at 7:30PM Mar 19, 2023Observed: 4.73 ft at 7:45PM Mar 19, 2023Observed: 4.72 ft at 8:00PM Mar 19, 2023Observed: 4.72 ft at 8:15PM Mar 19, 2023Observed: 4.72 ft at 8:30PM Mar 19, 2023Observed: 4.71 ft at 8:45PM Mar 19, 2023Observed: 4.72 ft at 9:00PM Mar 19, 2023Observed: 4.72 ft at 9:15PM Mar 19, 2023Observed: 4.72 ft at 9:30PM Mar 19, 2023Observed: 4.72 ft at 9:45PM Mar 19, 2023Observed: 4.72 ft at 10:00PM Mar 19, 2023Observed: 4.71 ft at 10:15PM Mar 19, 2023Observed: 4.72 ft at 10:30PM Mar 19, 2023Observed: 4.71 ft at 10:45PM Mar 19, 2023Observed: 4.72 ft at 11:00PM Mar 19, 2023Observed: 4.72 ft at 11:15PM Mar 19, 2023Observed: 4.71 ft at 11:30PM Mar 19, 2023Observed: 4.71 ft at 11:45PM Mar 19, 2023Observed: 4.71 ft at 12:00AM Mar 20, 2023Observed: 4.71 ft at 12:15AM Mar 20, 2023Observed: 4.72 ft at 12:30AM Mar 20, 2023Observed: 4.71 ft at 12:45AM Mar 20, 2023Observed: 4.71 ft at 1:00AM Mar 20, 2023Observed: 4.71 ft at 1:15AM Mar 20, 2023Observed: 4.7 ft at 1:30AM Mar 20, 2023Observed: 4.71 ft at 1:45AM Mar 20, 2023Observed: 4.71 ft at 2:00AM Mar 20, 2023Observed: 4.71 ft at 2:15AM Mar 20, 2023Observed: 4.71 ft at 2:30AM Mar 20, 2023Observed: 4.7 ft at 2:45AM Mar 20, 2023Observed: 4.71 ft at 3:00AM Mar 20, 2023Observed: 4.71 ft at 3:15AM Mar 20, 2023Observed: 4.7 ft at 3:30AM Mar 20, 2023Observed: 4.7 ft at 3:45AM Mar 20, 2023Observed: 4.7 ft at 4:00AM Mar 20, 2023Observed: 4.7 ft at 4:15AM Mar 20, 2023Observed: 4.69 ft at 4:30AM Mar 20, 2023Observed: 4.7 ft at 4:45AM Mar 20, 2023Observed: 4.7 ft at 5:00AM Mar 20, 2023Observed: 4.7 ft at 5:15AM Mar 20, 2023Observed: 4.7 ft at 5:30AM Mar 20, 2023Observed: 4.7 ft at 5:45AM Mar 20, 2023Observed: 4.69 ft at 6:00AM Mar 20, 2023Observed: 4.7 ft at 6:15AM Mar 20, 2023Observed: 4.69 ft at 6:30AM Mar 20, 2023Observed: 4.69 ft at 6:45AM Mar 20, 2023Observed: 4.69 ft at 7:00AM Mar 20, 2023Observed: 4.69 ft at 7:15AM Mar 20, 2023Observed: 4.69 ft at 7:30AM Mar 20, 2023Observed: 4.69 ft at 7:45AM Mar 20, 2023Observed: 4.69 ft at 8:00AM Mar 20, 2023Observed: 4.69 ft at 8:15AM Mar 20, 2023Observed: 4.68 ft at 8:30AM Mar 20, 2023Observed: 4.69 ft at 8:45AM Mar 20, 2023Observed: 4.69 ft at 9:00AM Mar 20, 2023Observed: 4.68 ft at 9:15AM Mar 20, 2023Observed: 4.68 ft at 9:30AM Mar 20, 2023Observed: 4.68 ft at 9:45AM Mar 20, 2023Observed: 4.69 ft at 10:00AM Mar 20, 2023Observed: 4.68 ft at 10:15AM Mar 20, 2023Observed: 4.68 ft at 10:30AM Mar 20, 2023Observed: 4.68 ft at 10:45AM Mar 20, 2023Observed: 4.68 ft at 11:00AM Mar 20, 2023Observed: 4.68 ft at 11:15AM Mar 20, 2023Observed: 4.67 ft at 11:30AM Mar 20, 2023Observed: 4.67 ft at 11:45AM Mar 20, 2023Observed: 4.67 ft at 12:00PM Mar 20, 2023Observed: 4.67 ft at 12:15PM Mar 20, 2023Observed: 4.67 ft at 12:30PM Mar 20, 2023Observed: 4.67 ft at 12:45PM Mar 20, 2023Observed: 4.67 ft at 1:00PM Mar 20, 2023Observed: 4.67 ft at 1:15PM Mar 20, 2023Observed: 4.67 ft at 1:30PM Mar 20, 2023Observed: 4.67 ft at 1:45PM Mar 20, 2023Observed: 4.66 ft at 2:00PM Mar 20, 2023Observed: 4.66 ft at 2:15PM Mar 20, 2023Observed: 4.66 ft at 2:30PM Mar 20, 2023Observed: 4.67 ft at 2:45PM Mar 20, 2023Observed: 4.66 ft at 3:00PM Mar 20, 2023Observed: 4.66 ft at 3:15PM Mar 20, 2023Observed: 4.66 ft at 3:30PM Mar 20, 2023Observed: 4.66 ft at 3:45PM Mar 20, 2023Observed: 4.66 ft at 4:00PM Mar 20, 2023Observed: 4.66 ft at 4:15PM Mar 20, 2023Observed: 4.65 ft at 4:30PM Mar 20, 2023Observed: 4.65 ft at 4:45PM Mar 20, 2023Observed: 4.65 ft at 5:00PM Mar 20, 2023Observed: 4.65 ft at 5:15PM Mar 20, 2023Observed: 4.66 ft at 5:30PM Mar 20, 2023Observed: 4.65 ft at 5:45PM Mar 20, 2023Observed: 4.65 ft at 6:00PM Mar 20, 2023Observed: 4.65 ft at 6:15PM Mar 20, 2023Observed: 4.65 ft at 6:30PM Mar 20, 2023Observed: 4.64 ft at 6:45PM Mar 20, 2023Observed: 4.64 ft at 7:00PM Mar 20, 2023Observed: 4.64 ft at 7:15PM Mar 20, 2023Observed: 4.64 ft at 7:30PM Mar 20, 2023Observed: 4.64 ft at 7:45PM Mar 20, 2023Observed: 4.64 ft at 8:00PM Mar 20, 2023Observed: 4.64 ft at 8:15PM Mar 20, 2023Observed: 4.64 ft at 8:30PM Mar 20, 2023Observed: 4.64 ft at 8:45PM Mar 20, 2023Observed: 4.64 ft at 9:00PM Mar 20, 2023Observed: 4.63 ft at 9:15PM Mar 20, 2023Observed: 4.63 ft at 9:30PM Mar 20, 2023Observed: 4.64 ft at 9:45PM Mar 20, 2023Observed: 4.64 ft at 10:00PM Mar 20, 2023Observed: 4.63 ft at 10:15PM Mar 20, 2023Observed: 4.63 ft at 10:30PM Mar 20, 2023Observed: 4.63 ft at 10:45PM Mar 20, 2023Observed: 4.63 ft at 11:00PM Mar 20, 2023Observed: 4.63 ft at 11:15PM Mar 20, 2023Observed: 4.63 ft at 11:30PM Mar 20, 2023Observed: 4.63 ft at 11:45PM Mar 20, 2023Observed: 4.63 ft at 12:00AM Mar 21, 2023Observed: 4.64 ft at 12:15AM Mar 21, 2023Observed: 4.64 ft at 12:30AM Mar 21, 2023Observed: 4.63 ft at 12:45AM Mar 21, 2023Observed: 4.64 ft at 1:00AM Mar 21, 2023Observed: 4.64 ft at 1:15AM Mar 21, 2023Observed: 4.64 ft at 1:30AM Mar 21, 2023Observed: 4.63 ft at 1:45AM Mar 21, 2023Observed: 4.63 ft at 2:00AM Mar 21, 2023Observed: 4.64 ft at 2:15AM Mar 21, 2023Observed: 4.63 ft at 2:30AM Mar 21, 2023Observed: 4.63 ft at 2:45AM Mar 21, 2023Observed: 4.63 ft at 3:00AM Mar 21, 2023Observed: 4.64 ft at 3:15AM Mar 21, 2023Observed: 4.63 ft at 3:30AM Mar 21, 2023Observed: 4.64 ft at 3:45AM Mar 21, 2023Observed: 4.63 ft at 4:00AM Mar 21, 2023Observed: 4.64 ft at 4:15AM Mar 21, 2023Observed: 4.64 ft at 4:30AM Mar 21, 2023Observed: 4.63 ft at 4:45AM Mar 21, 2023Observed: 4.63 ft at 5:00AM Mar 21, 2023Observed: 4.63 ft at 5:15AM Mar 21, 2023Observed: 4.63 ft at 5:30AM Mar 21, 2023Observed: 4.63 ft at 5:45AM Mar 21, 2023Observed: 4.64 ft at 6:00AM Mar 21, 2023Observed: 4.63 ft at 6:15AM Mar 21, 2023Observed: 4.64 ft at 6:30AM Mar 21, 2023Observed: 4.63 ft at 6:45AM Mar 21, 2023Observed: 4.63 ft at 7:00AM Mar 21, 2023Observed: 4.63 ft at 7:15AM Mar 21, 2023Observed: 4.63 ft at 7:30AM Mar 21, 2023Observed: 4.63 ft at 7:45AM Mar 21, 2023Observed: 4.63 ft at 8:00AM Mar 21, 2023Observed: 4.63 ft at 8:15AM Mar 21, 2023Observed: 4.63 ft at 8:30AM Mar 21, 2023Observed: 4.62 ft at 8:45AM Mar 21, 2023Observed: 4.62 ft at 9:00AM Mar 21, 2023Observed: 4.62 ft at 9:15AM Mar 21, 2023Observed: 4.62 ft at 9:30AM Mar 21, 2023Observed: 4.61 ft at 9:45AM Mar 21, 2023Observed: 4.62 ft at 10:00AM Mar 21, 2023Observed: 4.62 ft at 10:15AM Mar 21, 2023Observed: 4.62 ft at 10:30AM Mar 21, 2023Observed: 4.62 ft at 10:45AM Mar 21, 2023Observed: 4.62 ft at 11:00AM Mar 21, 2023Observed: 4.61 ft at 11:15AM Mar 21, 2023Observed: 4.61 ft at 11:30AM Mar 21, 2023Observed: 4.6 ft at 11:45AM Mar 21, 2023Observed: 4.61 ft at 12:00PM Mar 21, 2023Observed: 4.61 ft at 12:15PM Mar 21, 2023Observed: 4.61 ft at 12:30PM Mar 21, 2023Observed: 4.6 ft at 12:45PM Mar 21, 2023Observed: 4.61 ft at 1:00PM Mar 21, 2023Observed: 4.6 ft at 1:15PM Mar 21, 2023Observed: 4.6 ft at 1:30PM Mar 21, 2023Observed: 4.6 ft at 1:45PM Mar 21, 2023Observed: 4.6 ft at 2:00PM Mar 21, 2023Observed: 4.6 ft at 2:15PM Mar 21, 2023Observed: 4.6 ft at 2:30PM Mar 21, 2023Observed: 4.6 ft at 2:45PM Mar 21, 2023Observed: 4.6 ft at 3:00PM Mar 21, 2023Observed: 4.6 ft at 3:15PM Mar 21, 2023Observed: 4.6 ft at 3:30PM Mar 21, 2023Observed: 4.59 ft at 3:45PM Mar 21, 2023Observed: 4.59 ft at 4:00PM Mar 21, 2023Observed: 4.6 ft at 4:15PM Mar 21, 2023Observed: 4.59 ft at 4:30PM Mar 21, 2023Observed: 4.59 ft at 4:45PM Mar 21, 2023Observed: 4.59 ft at 5:00PM Mar 21, 2023Observed: 4.59 ft at 5:15PM Mar 21, 2023Observed: 4.59 ft at 5:30PM Mar 21, 2023Observed: 4.59 ft at 5:45PM Mar 21, 2023Observed: 4.59 ft at 6:00PM Mar 21, 2023Observed: 4.59 ft at 6:15PM Mar 21, 2023Observed: 4.58 ft at 6:30PM Mar 21, 2023Observed: 4.59 ft at 6:45PM Mar 21, 2023Observed: 4.59 ft at 7:00PM Mar 21, 2023Observed: 4.59 ft at 7:15PM Mar 21, 2023Observed: 4.59 ft at 7:30PM Mar 21, 2023Observed: 4.59 ft at 7:45PM Mar 21, 2023Observed: 4.58 ft at 8:00PM Mar 21, 2023Observed: 4.58 ft at 8:15PM Mar 21, 2023Observed: 4.58 ft at 8:30PM Mar 21, 2023Observed: 4.58 ft at 8:45PM Mar 21, 2023Observed: 4.58 ft at 9:00PM Mar 21, 2023Observed: 4.59 ft at 9:15PM Mar 21, 2023Observed: 4.59 ft at 9:30PM Mar 21, 2023Observed: 4.58 ft at 9:45PM Mar 21, 2023Observed: 4.58 ft at 10:00PM Mar 21, 2023Observed: 4.58 ft at 10:15PM Mar 21, 2023Observed: 4.58 ft at 10:30PM Mar 21, 2023Observed: 4.58 ft at 10:45PM Mar 21, 2023Observed: 4.58 ft at 11:00PM Mar 21, 2023Observed: 4.58 ft at 11:15PM Mar 21, 2023Observed: 4.58 ft at 11:30PM Mar 21, 2023Observed: 4.58 ft at 11:45PM Mar 21, 2023Observed: 4.57 ft at 12:00AM Mar 22, 2023Observed: 4.58 ft at 12:15AM Mar 22, 2023Observed: 4.57 ft at 12:30AM Mar 22, 2023Observed: 4.57 ft at 12:45AM Mar 22, 2023Observed: 4.57 ft at 1:00AM Mar 22, 2023Observed: 4.57 ft at 1:15AM Mar 22, 2023Observed: 4.57 ft at 1:30AM Mar 22, 2023Observed: 4.57 ft at 1:45AM Mar 22, 2023Observed: 4.57 ft at 2:00AM Mar 22, 2023Observed: 4.57 ft at 2:15AM Mar 22, 2023Observed: 4.57 ft at 2:30AM Mar 22, 2023Observed: 4.57 ft at 2:45AM Mar 22, 2023Observed: 4.57 ft at 3:00AM Mar 22, 2023Observed: 4.56 ft at 3:15AM Mar 22, 2023Observed: 4.57 ft at 3:30AM Mar 22, 2023Observed: 4.56 ft at 3:45AM Mar 22, 2023Observed: 4.56 ft at 4:00AM Mar 22, 2023Observed: 4.56 ft at 4:15AM Mar 22, 2023Observed: 4.57 ft at 4:30AM Mar 22, 2023Observed: 4.56 ft at 4:45AM Mar 22, 2023Observed: 4.56 ft at 5:00AM Mar 22, 2023Observed: 4.56 ft at 5:15AM Mar 22, 2023Observed: 4.56 ft at 5:30AM Mar 22, 2023Observed: 4.56 ft at 5:45AM Mar 22, 2023Observed: 4.56 ft at 6:00AM Mar 22, 2023Observed: 4.56 ft at 6:15AM Mar 22, 2023Observed: 4.56 ft at 6:30AM Mar 22, 2023Observed: 4.56 ft at 6:45AM Mar 22, 2023Observed: 4.56 ft at 7:00AM Mar 22, 2023Observed: 4.56 ft at 7:15AM Mar 22, 2023Observed: 4.55 ft at 7:30AM Mar 22, 2023Observed: 4.56 ft at 7:45AM Mar 22, 2023Observed: 4.55 ft at 8:00AM Mar 22, 2023Observed: 4.56 ft at 8:15AM Mar 22, 2023Observed: 4.55 ft at 8:30AM Mar 22, 2023Observed: 4.56 ft at 8:45AM Mar 22, 2023Observed: 4.56 ft at 9:00AM Mar 22, 2023Observed: 4.55 ft at 9:15AM Mar 22, 2023Observed: 4.55 ft at 9:30AM Mar 22, 2023Observed: 4.55 ft at 9:45AM Mar 22, 2023Observed: 4.55 ft at 10:00AM Mar 22, 2023Observed: 4.56 ft at 10:15AM Mar 22, 2023Observed: 4.55 ft at 10:30AM Mar 22, 2023Observed: 4.55 ft at 10:45AM Mar 22, 2023Observed: 4.55 ft at 11:00AM Mar 22, 2023Forecast: 4.5 ft 2:00PM Mar 22, 2023Forecast: 4.5 ft 8:00PM Mar 22, 2023Forecast: 4.5 ft 2:00AM Mar 23, 2023Forecast: 4.5 ft 8:00AM Mar 23, 2023Forecast: 4.5 ft 2:00PM Mar 23, 2023Forecast: 4.5 ft 8:00PM Mar 23, 2023Forecast: 4.5 ft 2:00AM Mar 24, 2023Forecast: 4.6 ft 8:00AM Mar 24, 2023Forecast: 4.8 ft 2:00PM Mar 24, 2023Forecast: 5.2 ft 8:00PM Mar 24, 2023Forecast: 5.6 ft 2:00AM Mar 25, 2023Highest Forecast: 5.9 ft 8:00AM Mar 25, 2023USGS--Water Resources of the United StatesPETW2(plotting HGIRG) Graph Created (11:56AM Mar 22, 2023)ObservedForecast (issued 9:36AM Mar 22)Latest observed value: 4.55 ft at 11:00 AM EDT 22-Mar-2023. Flood Stage is 14 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the South Branch Potomac River near Petersburg are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Franklin Upstream Gauge Downstream Gauge Downstream Gauge - near Springfield
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 15
Flood Stage: 14
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 22.83 ft on 06/17/1949
(2) 22.20 ft on 09/06/1996
(3) 21.80 ft on 11/05/1985
(4) 21.20 ft on 11/24/1877
(5) 20.30 ft on 03/17/1936
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.25 ft on 03/01/2021
(2) 16.93 ft on 04/16/2018
(3) 14.38 ft on 05/16/2014
(4) 12.80 ft on 05/08/2013
(5) 11.80 ft on 05/18/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.40 ft on 08/20/1988

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
22.5 Significant flooding is occurring. More than a hundred buildings in Petersburg are flooded.
20 Several city blocks on the south side of Petersburg are flooded. Backwater may also flood portions of the eastern sections of the city.
18 Water covers the entire runway at Grant County Airport and is in nearby structures. Hundreds of acres of lowlands are flooded. Water approaches homes on the north side of the river in Petersburg.
17 Water reaches structures at the Grant County Airport. Flooding also begins south of the river on the south side of Petersburg.
15 Two structures are flooded upstream of Petersburg. Water also approaches the runway at the Petersburg Airport.
14 Water approaches structures upstream of Petersburg. Water also begins to cover Fish Hatchery Road near the river.
12 Water overflows the natural banks into nearby lowlands. River Road alongside the river begins to flood in its lowest spots.
About This Location Collapse

Latitude: 38.991111° N, Longitude: 79.176111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 14 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 968.34 ft 981.34 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.
Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(571) 888-3500
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:30 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities