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
 
Hydrograph River at a Glance Download
Difficult Run near Great Falls Stage (ft)Flow (cfs)Observed: 2.93 ft at 4:15AM Oct 20, 2020Observed: 2.93 ft at 4:30AM Oct 20, 2020Observed: 2.93 ft at 4:45AM Oct 20, 2020Observed: 2.93 ft at 5:00AM Oct 20, 2020Observed: 2.93 ft at 5:15AM Oct 20, 2020Observed: 2.93 ft at 5:30AM Oct 20, 2020Observed: 2.93 ft at 5:45AM Oct 20, 2020Observed: 2.93 ft at 6:00AM Oct 20, 2020Observed: 2.93 ft at 6:15AM Oct 20, 2020Observed: 2.93 ft at 6:30AM Oct 20, 2020Observed: 2.93 ft at 6:45AM Oct 20, 2020Observed: 2.93 ft at 7:00AM Oct 20, 2020Observed: 2.93 ft at 7:15AM Oct 20, 2020Observed: 2.93 ft at 7:30AM Oct 20, 2020Observed: 2.93 ft at 7:45AM Oct 20, 2020Observed: 2.93 ft at 8:00AM Oct 20, 2020Observed: 2.93 ft at 8:15AM Oct 20, 2020Observed: 2.93 ft at 8:30AM Oct 20, 2020Observed: 2.93 ft at 8:45AM Oct 20, 2020Observed: 2.93 ft at 9:00AM Oct 20, 2020Observed: 2.93 ft at 9:15AM Oct 20, 2020Observed: 2.93 ft at 9:30AM Oct 20, 2020Observed: 2.93 ft at 9:45AM Oct 20, 2020Observed: 2.93 ft at 10:00AM Oct 20, 2020Observed: 2.93 ft at 10:15AM Oct 20, 2020Observed: 2.93 ft at 10:30AM Oct 20, 2020Observed: 2.92 ft at 10:45AM Oct 20, 2020Observed: 2.92 ft at 11:00AM Oct 20, 2020Observed: 2.92 ft at 11:15AM Oct 20, 2020Observed: 2.92 ft at 11:30AM Oct 20, 2020Observed: 2.92 ft at 11:45AM Oct 20, 2020Observed: 2.92 ft at 12:00PM Oct 20, 2020Observed: 2.92 ft at 12:15PM Oct 20, 2020Observed: 2.92 ft at 12:30PM Oct 20, 2020Observed: 2.92 ft at 12:45PM Oct 20, 2020Observed: 2.92 ft at 1:00PM Oct 20, 2020Observed: 2.92 ft at 1:15PM Oct 20, 2020Observed: 2.92 ft at 1:30PM Oct 20, 2020Observed: 2.92 ft at 1:45PM Oct 20, 2020Observed: 2.92 ft at 2:00PM Oct 20, 2020Observed: 2.92 ft at 2:15PM Oct 20, 2020Observed: 2.92 ft at 2:30PM Oct 20, 2020Observed: 2.92 ft at 2:45PM Oct 20, 2020Observed: 2.92 ft at 3:00PM Oct 20, 2020Observed: 2.92 ft at 3:15PM Oct 20, 2020Observed: 2.92 ft at 3:30PM Oct 20, 2020Observed: 2.92 ft at 3:45PM Oct 20, 2020Observed: 2.92 ft at 4:00PM Oct 20, 2020Observed: 2.92 ft at 4:15PM Oct 20, 2020Observed: 2.92 ft at 4:30PM Oct 20, 2020Observed: 2.92 ft at 4:45PM Oct 20, 2020Observed: 2.92 ft at 5:00PM Oct 20, 2020Observed: 2.92 ft at 5:15PM Oct 20, 2020Observed: 2.92 ft at 5:30PM Oct 20, 2020Observed: 2.91 ft at 5:45PM Oct 20, 2020Observed: 2.91 ft at 6:00PM Oct 20, 2020Observed: 2.91 ft at 6:15PM Oct 20, 2020Observed: 2.91 ft at 6:30PM Oct 20, 2020Observed: 2.91 ft at 6:45PM Oct 20, 2020Observed: 2.91 ft at 7:00PM Oct 20, 2020Observed: 2.91 ft at 7:15PM Oct 20, 2020Observed: 2.91 ft at 7:30PM Oct 20, 2020Observed: 2.91 ft at 7:45PM Oct 20, 2020Observed: 2.91 ft at 8:00PM Oct 20, 2020Observed: 2.91 ft at 8:15PM Oct 20, 2020Observed: 2.91 ft at 8:30PM Oct 20, 2020Observed: 2.91 ft at 8:45PM Oct 20, 2020Observed: 2.91 ft at 9:00PM Oct 20, 2020Observed: 2.91 ft at 9:15PM Oct 20, 2020Observed: 2.91 ft at 9:30PM Oct 20, 2020Observed: 2.91 ft at 9:45PM Oct 20, 2020Observed: 2.91 ft at 10:00PM Oct 20, 2020Observed: 2.91 ft at 10:15PM Oct 20, 2020Observed: 2.91 ft at 10:30PM Oct 20, 2020Observed: 2.91 ft at 10:45PM Oct 20, 2020Observed: 2.91 ft at 11:00PM Oct 20, 2020Observed: 2.91 ft at 11:15PM Oct 20, 2020Observed: 2.92 ft at 11:30PM Oct 20, 2020Observed: 2.92 ft at 11:45PM Oct 20, 2020Observed: 2.92 ft at 12:00AM Oct 21, 2020Observed: 2.92 ft at 12:15AM Oct 21, 2020Observed: 2.92 ft at 12:30AM Oct 21, 2020Observed: 2.92 ft at 12:45AM Oct 21, 2020Observed: 2.92 ft at 1:00AM Oct 21, 2020Observed: 2.92 ft at 1:15AM Oct 21, 2020Observed: 2.92 ft at 1:30AM Oct 21, 2020Observed: 2.92 ft at 1:45AM Oct 21, 2020Observed: 2.92 ft at 2:00AM Oct 21, 2020Observed: 2.93 ft at 2:15AM Oct 21, 2020Observed: 2.93 ft at 2:30AM Oct 21, 2020Observed: 2.93 ft at 2:45AM Oct 21, 2020Observed: 2.93 ft at 3:00AM Oct 21, 2020Observed: 2.93 ft at 3:15AM Oct 21, 2020Observed: 2.93 ft at 3:30AM Oct 21, 2020Observed: 2.93 ft at 3:45AM Oct 21, 2020Observed: 2.93 ft at 4:00AM Oct 21, 2020Observed: 2.93 ft at 4:15AM Oct 21, 2020Observed: 2.93 ft at 4:30AM Oct 21, 2020Observed: 2.93 ft at 4:45AM Oct 21, 2020Observed: 2.93 ft at 5:00AM Oct 21, 2020Observed: 2.93 ft at 5:15AM Oct 21, 2020Observed: 2.93 ft at 5:30AM Oct 21, 2020Observed: 2.93 ft at 5:45AM Oct 21, 2020Observed: 2.93 ft at 6:00AM Oct 21, 2020Observed: 2.93 ft at 6:15AM Oct 21, 2020Observed: 2.93 ft at 6:30AM Oct 21, 2020Observed: 2.93 ft at 6:45AM Oct 21, 2020Observed: 2.93 ft at 7:00AM Oct 21, 2020Observed: 2.93 ft at 7:15AM Oct 21, 2020Observed: 2.93 ft at 7:30AM Oct 21, 2020Observed: 2.92 ft at 7:45AM Oct 21, 2020Observed: 2.92 ft at 8:00AM Oct 21, 2020Observed: 2.92 ft at 8:15AM Oct 21, 2020Observed: 2.92 ft at 8:30AM Oct 21, 2020Observed: 2.92 ft at 8:45AM Oct 21, 2020Observed: 2.92 ft at 9:00AM Oct 21, 2020Observed: 2.92 ft at 9:15AM Oct 21, 2020Observed: 2.92 ft at 9:30AM Oct 21, 2020Observed: 2.92 ft at 9:45AM Oct 21, 2020Observed: 2.92 ft at 10:00AM Oct 21, 2020Observed: 2.92 ft at 10:15AM Oct 21, 2020Observed: 2.92 ft at 10:30AM Oct 21, 2020Observed: 2.92 ft at 10:45AM Oct 21, 2020Observed: 2.92 ft at 11:00AM Oct 21, 2020Observed: 2.92 ft at 11:15AM Oct 21, 2020Observed: 2.92 ft at 11:30AM Oct 21, 2020Observed: 2.92 ft at 11:45AM Oct 21, 2020Observed: 2.92 ft at 12:00PM Oct 21, 2020Observed: 2.92 ft at 12:15PM Oct 21, 2020Observed: 2.92 ft at 12:30PM Oct 21, 2020Observed: 2.92 ft at 12:45PM Oct 21, 2020Observed: 2.92 ft at 1:00PM Oct 21, 2020Observed: 2.92 ft at 1:15PM Oct 21, 2020Observed: 2.92 ft at 1:30PM Oct 21, 2020Observed: 2.91 ft at 1:45PM Oct 21, 2020Observed: 2.91 ft at 2:00PM Oct 21, 2020Observed: 2.91 ft at 2:15PM Oct 21, 2020Observed: 2.91 ft at 2:30PM Oct 21, 2020Observed: 2.91 ft at 2:45PM Oct 21, 2020Observed: 2.91 ft at 3:00PM Oct 21, 2020Observed: 2.91 ft at 3:15PM Oct 21, 2020Observed: 2.91 ft at 3:30PM Oct 21, 2020Observed: 2.91 ft at 3:45PM Oct 21, 2020Observed: 2.91 ft at 4:00PM Oct 21, 2020Observed: 2.91 ft at 4:15PM Oct 21, 2020Observed: 2.91 ft at 4:30PM Oct 21, 2020Observed: 2.91 ft at 4:45PM Oct 21, 2020Observed: 2.91 ft at 5:00PM Oct 21, 2020Observed: 2.91 ft at 5:15PM Oct 21, 2020Observed: 2.91 ft at 5:30PM Oct 21, 2020Observed: 2.91 ft at 5:45PM Oct 21, 2020Observed: 2.91 ft at 6:00PM Oct 21, 2020Observed: 2.91 ft at 6:15PM Oct 21, 2020Observed: 2.91 ft at 6:30PM Oct 21, 2020Observed: 2.91 ft at 6:45PM Oct 21, 2020Observed: 2.91 ft at 7:00PM Oct 21, 2020Observed: 2.91 ft at 7:15PM Oct 21, 2020Observed: 2.91 ft at 7:30PM Oct 21, 2020Observed: 2.91 ft at 7:45PM Oct 21, 2020Observed: 2.91 ft at 8:00PM Oct 21, 2020Observed: 2.91 ft at 8:15PM Oct 21, 2020Observed: 2.91 ft at 8:30PM Oct 21, 2020Observed: 2.91 ft at 8:45PM Oct 21, 2020Observed: 2.91 ft at 9:00PM Oct 21, 2020Observed: 2.91 ft at 9:15PM Oct 21, 2020Observed: 2.91 ft at 9:30PM Oct 21, 2020Observed: 2.91 ft at 9:45PM Oct 21, 2020Observed: 2.91 ft at 10:00PM Oct 21, 2020Observed: 2.92 ft at 10:15PM Oct 21, 2020Observed: 2.92 ft at 10:30PM Oct 21, 2020Observed: 2.92 ft at 10:45PM Oct 21, 2020Observed: 2.92 ft at 11:00PM Oct 21, 2020Observed: 2.92 ft at 11:15PM Oct 21, 2020Observed: 2.92 ft at 11:30PM Oct 21, 2020Observed: 2.92 ft at 11:45PM Oct 21, 2020Observed: 2.92 ft at 12:00AM Oct 22, 2020Observed: 2.92 ft at 12:15AM Oct 22, 2020Observed: 2.92 ft at 12:30AM Oct 22, 2020Observed: 2.92 ft at 12:45AM Oct 22, 2020Observed: 2.92 ft at 1:00AM Oct 22, 2020Observed: 2.92 ft at 1:15AM Oct 22, 2020Observed: 2.92 ft at 1:30AM Oct 22, 2020Observed: 2.92 ft at 1:45AM Oct 22, 2020Observed: 2.92 ft at 2:00AM Oct 22, 2020Observed: 2.92 ft at 2:15AM Oct 22, 2020Observed: 2.92 ft at 2:30AM Oct 22, 2020Observed: 2.92 ft at 2:45AM Oct 22, 2020Observed: 2.92 ft at 3:00AM Oct 22, 2020Observed: 2.92 ft at 3:15AM Oct 22, 2020Observed: 2.92 ft at 3:30AM Oct 22, 2020Observed: 2.92 ft at 3:45AM Oct 22, 2020Observed: 2.92 ft at 4:00AM Oct 22, 2020Observed: 2.92 ft at 4:15AM Oct 22, 2020Observed: 2.92 ft at 4:30AM Oct 22, 2020Observed: 2.92 ft at 4:45AM Oct 22, 2020Observed: 2.92 ft at 5:00AM Oct 22, 2020Observed: 2.92 ft at 5:15AM Oct 22, 2020Observed: 2.92 ft at 5:30AM Oct 22, 2020Observed: 2.92 ft at 5:45AM Oct 22, 2020Observed: 2.92 ft at 6:00AM Oct 22, 2020Observed: 2.92 ft at 6:15AM Oct 22, 2020Observed: 2.92 ft at 6:30AM Oct 22, 2020Observed: 2.92 ft at 6:45AM Oct 22, 2020Observed: 2.92 ft at 7:00AM Oct 22, 2020Observed: 2.92 ft at 7:15AM Oct 22, 2020Observed: 2.92 ft at 7:30AM Oct 22, 2020Observed: 2.92 ft at 7:45AM Oct 22, 2020Observed: 2.92 ft at 8:00AM Oct 22, 2020Observed: 2.92 ft at 8:15AM Oct 22, 2020Observed: 2.92 ft at 8:30AM Oct 22, 2020Observed: 2.92 ft at 8:45AM Oct 22, 2020Observed: 2.92 ft at 9:00AM Oct 22, 2020Observed: 2.92 ft at 9:15AM Oct 22, 2020Observed: 2.92 ft at 9:30AM Oct 22, 2020Observed: 2.92 ft at 9:45AM Oct 22, 2020Observed: 2.92 ft at 10:00AM Oct 22, 2020Observed: 2.92 ft at 10:15AM Oct 22, 2020Observed: 2.92 ft at 10:30AM Oct 22, 2020Observed: 2.92 ft at 10:45AM Oct 22, 2020Observed: 2.92 ft at 11:00AM Oct 22, 2020Observed: 2.92 ft at 11:15AM Oct 22, 2020Observed: 2.92 ft at 11:30AM Oct 22, 2020Observed: 2.92 ft at 11:45AM Oct 22, 2020Observed: 2.92 ft at 12:00PM Oct 22, 2020Observed: 2.92 ft at 12:15PM Oct 22, 2020Observed: 2.92 ft at 12:30PM Oct 22, 2020Observed: 2.92 ft at 12:45PM Oct 22, 2020Observed: 2.92 ft at 1:00PM Oct 22, 2020Observed: 2.92 ft at 1:15PM Oct 22, 2020Observed: 2.92 ft at 1:30PM Oct 22, 2020Observed: 2.92 ft at 1:45PM Oct 22, 2020Observed: 2.92 ft at 2:00PM Oct 22, 2020Observed: 2.92 ft at 2:15PM Oct 22, 2020Observed: 2.92 ft at 2:30PM Oct 22, 2020Observed: 2.92 ft at 2:45PM Oct 22, 2020Observed: 2.92 ft at 3:00PM Oct 22, 2020Observed: 2.92 ft at 3:15PM Oct 22, 2020Observed: 2.92 ft at 3:30PM Oct 22, 2020Observed: 2.92 ft at 3:45PM Oct 22, 2020Observed: 2.92 ft at 4:00PM Oct 22, 2020Observed: 2.92 ft at 4:15PM Oct 22, 2020Observed: 2.92 ft at 4:30PM Oct 22, 2020Observed: 2.92 ft at 4:45PM Oct 22, 2020Observed: 2.92 ft at 5:00PM Oct 22, 2020Observed: 2.92 ft at 5:15PM Oct 22, 2020Observed: 2.92 ft at 5:30PM Oct 22, 2020Observed: 2.92 ft at 5:45PM Oct 22, 2020Observed: 2.92 ft at 6:00PM Oct 22, 2020Observed: 2.92 ft at 6:15PM Oct 22, 2020Observed: 2.92 ft at 6:30PM Oct 22, 2020Observed: 2.92 ft at 6:45PM Oct 22, 2020Observed: 2.92 ft at 7:00PM Oct 22, 2020Observed: 2.92 ft at 7:15PM Oct 22, 2020Observed: 2.92 ft at 7:30PM Oct 22, 2020Observed: 2.92 ft at 7:45PM Oct 22, 2020Observed: 2.92 ft at 8:00PM Oct 22, 2020Observed: 2.92 ft at 8:15PM Oct 22, 2020Observed: 2.92 ft at 8:30PM Oct 22, 2020Observed: 2.92 ft at 8:45PM Oct 22, 2020Observed: 2.92 ft at 9:00PM Oct 22, 2020Observed: 2.92 ft at 9:15PM Oct 22, 2020Observed: 2.92 ft at 9:30PM Oct 22, 2020Observed: 2.92 ft at 9:45PM Oct 22, 2020Observed: 2.92 ft at 10:00PM Oct 22, 2020Observed: 2.92 ft at 10:15PM Oct 22, 2020Observed: 2.92 ft at 10:30PM Oct 22, 2020Observed: 2.92 ft at 10:45PM Oct 22, 2020Observed: 2.92 ft at 11:00PM Oct 22, 2020Observed: 2.92 ft at 11:15PM Oct 22, 2020Observed: 2.93 ft at 11:30PM Oct 22, 2020Observed: 2.93 ft at 11:45PM Oct 22, 2020Observed: 2.92 ft at 12:00AM Oct 23, 2020Observed: 2.93 ft at 12:15AM Oct 23, 2020Observed: 2.93 ft at 12:30AM Oct 23, 2020Observed: 2.93 ft at 12:45AM Oct 23, 2020Observed: 2.93 ft at 1:00AM Oct 23, 2020Observed: 2.93 ft at 1:15AM Oct 23, 2020Observed: 2.93 ft at 1:30AM Oct 23, 2020Observed: 2.93 ft at 1:45AM Oct 23, 2020Observed: 2.93 ft at 2:00AM Oct 23, 2020Highest Observation: 2.94 ft at 2:15AM Oct 23, 2020Observed: 2.93 ft at 2:30AM Oct 23, 2020Observed: 2.93 ft at 2:45AM Oct 23, 2020Highest Observation: 2.94 ft at 3:00AM Oct 23, 2020Observed: 2.93 ft at 3:15AM Oct 23, 2020Observed: 2.93 ft at 3:30AM Oct 23, 2020Highest Observation: 2.94 ft at 3:45AM Oct 23, 2020Observed: 2.93 ft at 4:00AM Oct 23, 2020Observed: 2.93 ft at 4:15AM Oct 23, 2020Observed: 2.93 ft at 4:30AM Oct 23, 2020Observed: 2.93 ft at 4:45AM Oct 23, 2020Observed: 2.93 ft at 5:00AM Oct 23, 2020Observed: 2.93 ft at 5:15AM Oct 23, 2020Observed: 2.93 ft at 5:30AM Oct 23, 2020Observed: 2.93 ft at 5:45AM Oct 23, 2020Observed: 2.93 ft at 6:00AM Oct 23, 2020Observed: 2.93 ft at 6:15AM Oct 23, 2020Observed: 2.93 ft at 6:30AM Oct 23, 2020Observed: 2.93 ft at 6:45AM Oct 23, 2020Observed: 2.93 ft at 7:00AM Oct 23, 2020Observed: 2.93 ft at 7:15AM Oct 23, 2020Observed: 2.93 ft at 7:30AM Oct 23, 2020Observed: 2.93 ft at 7:45AM Oct 23, 2020Observed: 2.93 ft at 8:00AM Oct 23, 2020Observed: 2.93 ft at 8:15AM Oct 23, 2020Observed: 2.93 ft at 8:30AM Oct 23, 2020Observed: 2.93 ft at 8:45AM Oct 23, 2020Observed: 2.93 ft at 9:00AM Oct 23, 2020Observed: 2.93 ft at 9:15AM Oct 23, 2020Observed: 2.93 ft at 9:30AM Oct 23, 2020Observed: 2.92 ft at 9:45AM Oct 23, 2020Observed: 2.92 ft at 10:00AM Oct 23, 2020Observed: 2.92 ft at 10:15AM Oct 23, 2020Observed: 2.92 ft at 10:30AM Oct 23, 2020Observed: 2.92 ft at 10:45AM Oct 23, 2020Observed: 2.92 ft at 11:00AM Oct 23, 2020Observed: 2.92 ft at 11:15AM Oct 23, 2020Observed: 2.92 ft at 11:30AM Oct 23, 2020Observed: 2.92 ft at 11:45AM Oct 23, 2020Observed: 2.92 ft at 12:00PM Oct 23, 2020Observed: 2.92 ft at 12:15PM Oct 23, 2020Observed: 2.92 ft at 12:30PM Oct 23, 2020Observed: 2.92 ft at 12:45PM Oct 23, 2020Observed: 2.92 ft at 1:00PM Oct 23, 2020Observed: 2.92 ft at 1:15PM Oct 23, 2020Observed: 2.92 ft at 1:30PM Oct 23, 2020Observed: 2.92 ft at 1:45PM Oct 23, 2020Observed: 2.92 ft at 2:00PM Oct 23, 2020Observed: 2.92 ft at 2:15PM Oct 23, 2020Observed: 2.92 ft at 2:30PM Oct 23, 2020Observed: 2.92 ft at 2:45PM Oct 23, 2020Observed: 2.92 ft at 3:00PM Oct 23, 2020Observed: 2.92 ft at 3:15PM Oct 23, 2020Observed: 2.92 ft at 3:30PM Oct 23, 2020Observed: 2.92 ft at 3:45PM Oct 23, 2020Observed: 2.92 ft at 4:00PM Oct 23, 2020Observed: 2.92 ft at 4:15PM Oct 23, 2020Observed: 2.92 ft at 4:30PM Oct 23, 2020Observed: 2.92 ft at 4:45PM Oct 23, 2020Observed: 2.92 ft at 5:00PM Oct 23, 2020Observed: 2.92 ft at 5:15PM Oct 23, 2020Observed: 2.92 ft at 5:30PM Oct 23, 2020Observed: 2.92 ft at 5:45PM Oct 23, 2020Observed: 2.92 ft at 6:00PM Oct 23, 2020Observed: 2.92 ft at 6:15PM Oct 23, 2020Observed: 2.92 ft at 6:30PM Oct 23, 2020Observed: 2.92 ft at 6:45PM Oct 23, 2020Observed: 2.92 ft at 7:00PM Oct 23, 2020Observed: 2.92 ft at 7:15PM Oct 23, 2020Observed: 2.92 ft at 7:30PM Oct 23, 2020Observed: 2.92 ft at 7:45PM Oct 23, 2020Observed: 2.92 ft at 8:00PM Oct 23, 2020Observed: 2.92 ft at 8:15PM Oct 23, 2020Observed: 2.92 ft at 8:30PM Oct 23, 2020Observed: 2.92 ft at 8:45PM Oct 23, 2020Observed: 2.92 ft at 9:00PM Oct 23, 2020Observed: 2.92 ft at 9:15PM Oct 23, 2020Observed: 2.92 ft at 9:30PM Oct 23, 2020Observed: 2.92 ft at 9:45PM Oct 23, 2020Observed: 2.92 ft at 10:00PM Oct 23, 2020Observed: 2.92 ft at 10:15PM Oct 23, 2020Observed: 2.92 ft at 10:30PM Oct 23, 2020Observed: 2.92 ft at 10:45PM Oct 23, 2020Observed: 2.92 ft at 11:00PM Oct 23, 2020Observed: 2.92 ft at 11:15PM Oct 23, 2020Observed: 2.92 ft at 11:30PM Oct 23, 2020Observed: 2.92 ft at 11:45PM Oct 23, 2020Observed: 2.92 ft at 12:00AM Oct 24, 2020Observed: 2.92 ft at 12:15AM Oct 24, 2020Observed: 2.92 ft at 12:30AM Oct 24, 2020Observed: 2.92 ft at 12:45AM Oct 24, 2020Observed: 2.92 ft at 1:00AM Oct 24, 2020Observed: 2.92 ft at 1:15AM Oct 24, 2020Observed: 2.92 ft at 1:30AM Oct 24, 2020Observed: 2.92 ft at 1:45AM Oct 24, 2020Observed: 2.92 ft at 2:00AM Oct 24, 2020Observed: 2.92 ft at 2:15AM Oct 24, 2020Observed: 2.92 ft at 2:30AM Oct 24, 2020Observed: 2.92 ft at 2:45AM Oct 24, 2020Observed: 2.92 ft at 3:00AM Oct 24, 2020Observed: 2.92 ft at 3:15AM Oct 24, 2020Observed: 2.92 ft at 3:30AM Oct 24, 2020Observed: 2.92 ft at 3:45AM Oct 24, 2020Observed: 2.92 ft at 4:00AM Oct 24, 2020Observed: 2.92 ft at 4:15AM Oct 24, 2020Observed: 2.92 ft at 4:30AM Oct 24, 2020Observed: 2.92 ft at 4:45AM Oct 24, 2020Observed: 2.92 ft at 5:00AM Oct 24, 2020Observed: 2.92 ft at 5:15AM Oct 24, 2020Observed: 2.92 ft at 5:30AM Oct 24, 2020Observed: 2.92 ft at 5:45AM Oct 24, 2020Observed: 2.92 ft at 6:00AM Oct 24, 2020Observed: 2.92 ft at 6:15AM Oct 24, 2020Observed: 2.92 ft at 6:30AM Oct 24, 2020Observed: 2.92 ft at 6:45AM Oct 24, 2020Observed: 2.92 ft at 7:00AM Oct 24, 2020Observed: 2.92 ft at 7:15AM Oct 24, 2020Observed: 2.92 ft at 7:30AM Oct 24, 2020Observed: 2.92 ft at 7:45AM Oct 24, 2020Observed: 2.92 ft at 8:00AM Oct 24, 2020Observed: 2.92 ft at 8:15AM Oct 24, 2020Observed: 2.92 ft at 8:30AM Oct 24, 2020Observed: 2.92 ft at 8:45AM Oct 24, 2020Observed: 2.92 ft at 9:00AM Oct 24, 2020Observed: 2.92 ft at 9:15AM Oct 24, 2020Observed: 2.92 ft at 9:30AM Oct 24, 2020Observed: 2.92 ft at 9:45AM Oct 24, 2020Observed: 2.92 ft at 10:00AM Oct 24, 2020Observed: 2.92 ft at 10:15AM Oct 24, 2020Observed: 2.92 ft at 10:30AM Oct 24, 2020Observed: 2.92 ft at 10:45AM Oct 24, 2020Observed: 2.92 ft at 11:00AM Oct 24, 2020Observed: 2.92 ft at 11:15AM Oct 24, 2020Observed: 2.92 ft at 11:30AM Oct 24, 2020Observed: 2.92 ft at 11:45AM Oct 24, 2020Observed: 2.92 ft at 12:00PM Oct 24, 2020Observed: 2.92 ft at 12:15PM Oct 24, 2020Observed: 2.92 ft at 12:30PM Oct 24, 2020Observed: 2.92 ft at 12:45PM Oct 24, 2020Observed: 2.92 ft at 1:00PM Oct 24, 2020Observed: 2.92 ft at 1:15PM Oct 24, 2020Observed: 2.92 ft at 1:30PM Oct 24, 2020Observed: 2.92 ft at 1:45PM Oct 24, 2020Observed: 2.92 ft at 2:00PM Oct 24, 2020Observed: 2.92 ft at 2:15PM Oct 24, 2020Observed: 2.92 ft at 2:30PM Oct 24, 2020Observed: 2.92 ft at 2:45PM Oct 24, 2020Observed: 2.92 ft at 3:00PM Oct 24, 2020Observed: 2.92 ft at 3:15PM Oct 24, 2020Observed: 2.92 ft at 3:30PM Oct 24, 2020Observed: 2.92 ft at 3:45PM Oct 24, 2020Observed: 2.92 ft at 4:00PM Oct 24, 2020Observed: 2.92 ft at 4:15PM Oct 24, 2020Observed: 2.92 ft at 4:30PM Oct 24, 2020Observed: 2.92 ft at 4:45PM Oct 24, 2020Observed: 2.92 ft at 5:00PM Oct 24, 2020Observed: 2.92 ft at 5:15PM Oct 24, 2020Observed: 2.92 ft at 5:30PM Oct 24, 2020Observed: 2.92 ft at 5:45PM Oct 24, 2020Observed: 2.92 ft at 6:00PM Oct 24, 2020Observed: 2.92 ft at 6:15PM Oct 24, 2020Observed: 2.92 ft at 6:30PM Oct 24, 2020Observed: 2.92 ft at 6:45PM Oct 24, 2020Observed: 2.92 ft at 7:00PM Oct 24, 2020Observed: 2.92 ft at 7:15PM Oct 24, 2020Observed: 2.92 ft at 7:30PM Oct 24, 2020Observed: 2.92 ft at 7:45PM Oct 24, 2020Observed: 2.92 ft at 8:00PM Oct 24, 2020Observed: 2.92 ft at 8:15PM Oct 24, 2020Observed: 2.92 ft at 8:30PM Oct 24, 2020Observed: 2.92 ft at 8:45PM Oct 24, 2020Observed: 2.92 ft at 9:00PM Oct 24, 2020Observed: 2.92 ft at 9:15PM Oct 24, 2020Observed: 2.92 ft at 9:30PM Oct 24, 2020Observed: 2.92 ft at 9:45PM Oct 24, 2020Observed: 2.92 ft at 10:00PM Oct 24, 2020Observed: 2.92 ft at 10:15PM Oct 24, 2020Observed: 2.92 ft at 10:30PM Oct 24, 2020Observed: 2.92 ft at 10:45PM Oct 24, 2020Observed: 2.92 ft at 11:00PM Oct 24, 2020Observed: 2.92 ft at 11:15PM Oct 24, 2020Observed: 2.92 ft at 11:30PM Oct 24, 2020Observed: 2.92 ft at 11:45PM Oct 24, 2020Observed: 2.92 ft at 12:00AM Oct 25, 2020Observed: 2.92 ft at 12:15AM Oct 25, 2020Observed: 2.92 ft at 12:30AM Oct 25, 2020Observed: 2.92 ft at 12:45AM Oct 25, 2020Observed: 2.92 ft at 1:00AM Oct 25, 2020Observed: 2.92 ft at 1:15AM Oct 25, 2020Observed: 2.92 ft at 1:30AM Oct 25, 2020Observed: 2.92 ft at 1:45AM Oct 25, 2020Observed: 2.92 ft at 2:00AM Oct 25, 2020Observed: 2.92 ft at 2:15AM Oct 25, 2020Observed: 2.92 ft at 2:30AM Oct 25, 2020Observed: 2.92 ft at 2:45AM Oct 25, 2020Observed: 2.92 ft at 3:00AM Oct 25, 2020Observed: 2.92 ft at 3:15AM Oct 25, 2020USGS--Water Resources of the United StatesGFLV2(plotting HGIRG) Graph Created (4:09AM Oct 25, 2020)ObservedLatest observed value: 2.92 ft at 3:15 AM EDT 25-Oct-2020. Flood Stage is 11 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Difficult Run near Great Falls. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 13
Flood Stage: 11
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 21.40 ft on 06/22/1972
(2) 17.54 ft on 09/08/2011
(3) 16.62 ft on 09/06/2008
(4) 15.01 ft on 06/26/2006
(5) 13.82 ft on 09/26/1975
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.59 ft on 07/08/2019 (P)
(2) 11.08 ft on 08/01/2018
(3) 12.80 ft on 07/22/2018
(4) 12.23 ft on 05/16/2014
(5) 12.57 ft on 04/30/2014
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:15
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
20 Water approaches structures near the stream.
13 Water reaches the intersection of Leigh Mill Road and Kelso Road.
11 Leigh Mill Road floods near Difficult Run.
About This Location Collapse

Latitude: 38.975833° N, Longitude: 77.246111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 Not Available Not Available 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:
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
(703) 996-2200
Ask Questions/Webmaster
Page last modified: 1-Mar-2019 12:35 AM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities