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
Monocacy River near Frederick at Interstate 70 Stage (ft)Flow (kcfs)Observed: 1.66 ft at 12:45AM Jul 26, 2021Observed: 1.66 ft at 1:00AM Jul 26, 2021Observed: 1.66 ft at 1:15AM Jul 26, 2021Observed: 1.66 ft at 1:30AM Jul 26, 2021Observed: 1.66 ft at 1:45AM Jul 26, 2021Observed: 1.66 ft at 2:00AM Jul 26, 2021Observed: 1.65 ft at 2:15AM Jul 26, 2021Observed: 1.66 ft at 2:30AM Jul 26, 2021Observed: 1.66 ft at 2:45AM Jul 26, 2021Observed: 1.66 ft at 3:00AM Jul 26, 2021Observed: 1.66 ft at 3:15AM Jul 26, 2021Observed: 1.66 ft at 3:30AM Jul 26, 2021Observed: 1.66 ft at 3:45AM Jul 26, 2021Observed: 1.66 ft at 4:00AM Jul 26, 2021Observed: 1.66 ft at 4:15AM Jul 26, 2021Observed: 1.66 ft at 4:30AM Jul 26, 2021Observed: 1.66 ft at 4:31AM Jul 26, 2021Observed: 1.65 ft at 4:45AM Jul 26, 2021Observed: 1.65 ft at 5:00AM Jul 26, 2021Observed: 1.65 ft at 5:15AM Jul 26, 2021Observed: 1.65 ft at 5:30AM Jul 26, 2021Observed: 1.65 ft at 5:45AM Jul 26, 2021Observed: 1.65 ft at 6:00AM Jul 26, 2021Observed: 1.65 ft at 6:15AM Jul 26, 2021Observed: 1.65 ft at 6:30AM Jul 26, 2021Observed: 1.65 ft at 6:45AM Jul 26, 2021Observed: 1.65 ft at 7:00AM Jul 26, 2021Observed: 1.65 ft at 7:15AM Jul 26, 2021Observed: 1.65 ft at 7:30AM Jul 26, 2021Observed: 1.65 ft at 7:45AM Jul 26, 2021Observed: 1.65 ft at 8:00AM Jul 26, 2021Observed: 1.65 ft at 8:15AM Jul 26, 2021Observed: 1.65 ft at 8:30AM Jul 26, 2021Observed: 1.65 ft at 8:45AM Jul 26, 2021Observed: 1.65 ft at 9:00AM Jul 26, 2021Observed: 1.65 ft at 9:15AM Jul 26, 2021Observed: 1.65 ft at 9:30AM Jul 26, 2021Observed: 1.65 ft at 9:45AM Jul 26, 2021Observed: 1.65 ft at 10:00AM Jul 26, 2021Observed: 1.65 ft at 10:15AM Jul 26, 2021Observed: 1.65 ft at 10:30AM Jul 26, 2021Observed: 1.65 ft at 10:45AM Jul 26, 2021Observed: 1.66 ft at 11:00AM Jul 26, 2021Observed: 1.65 ft at 11:15AM Jul 26, 2021Observed: 1.66 ft at 11:30AM Jul 26, 2021Observed: 1.66 ft at 11:45AM Jul 26, 2021Observed: 1.66 ft at 12:00PM Jul 26, 2021Observed: 1.66 ft at 12:15PM Jul 26, 2021Observed: 1.66 ft at 12:30PM Jul 26, 2021Observed: 1.66 ft at 12:31PM Jul 26, 2021Observed: 1.66 ft at 12:45PM Jul 26, 2021Observed: 1.66 ft at 1:00PM Jul 26, 2021Observed: 1.67 ft at 1:15PM Jul 26, 2021Observed: 1.67 ft at 1:30PM Jul 26, 2021Observed: 1.67 ft at 1:45PM Jul 26, 2021Observed: 1.68 ft at 2:00PM Jul 26, 2021Observed: 1.7 ft at 2:15PM Jul 26, 2021Observed: 1.74 ft at 2:30PM Jul 26, 2021Observed: 1.81 ft at 2:45PM Jul 26, 2021Observed: 1.91 ft at 3:00PM Jul 26, 2021Observed: 2.04 ft at 3:15PM Jul 26, 2021Observed: 2.18 ft at 3:30PM Jul 26, 2021Observed: 2.34 ft at 3:45PM Jul 26, 2021Observed: 2.48 ft at 4:00PM Jul 26, 2021Observed: 2.62 ft at 4:15PM Jul 26, 2021Observed: 2.73 ft at 4:30PM Jul 26, 2021Observed: 2.83 ft at 4:45PM Jul 26, 2021Observed: 2.91 ft at 5:00PM Jul 26, 2021Observed: 2.98 ft at 5:15PM Jul 26, 2021Observed: 3.04 ft at 5:30PM Jul 26, 2021Observed: 3.08 ft at 5:45PM Jul 26, 2021Observed: 3.12 ft at 6:00PM Jul 26, 2021Observed: 3.14 ft at 6:15PM Jul 26, 2021Observed: 3.16 ft at 6:30PM Jul 26, 2021Observed: 3.17 ft at 6:45PM Jul 26, 2021Observed: 3.17 ft at 7:00PM Jul 26, 2021Highest Observation: 3.18 ft at 7:15PM Jul 26, 2021Highest Observation: 3.18 ft at 7:30PM Jul 26, 2021Observed: 3.17 ft at 7:45PM Jul 26, 2021Observed: 3.16 ft at 8:00PM Jul 26, 2021Observed: 3.15 ft at 8:15PM Jul 26, 2021Observed: 3.14 ft at 8:30PM Jul 26, 2021Observed: 3.14 ft at 8:31PM Jul 26, 2021Observed: 3.13 ft at 8:45PM Jul 26, 2021Observed: 3.11 ft at 9:00PM Jul 26, 2021Observed: 3.09 ft at 9:15PM Jul 26, 2021Observed: 3.07 ft at 9:30PM Jul 26, 2021Observed: 3.05 ft at 9:45PM Jul 26, 2021Observed: 3.03 ft at 10:00PM Jul 26, 2021Observed: 3.01 ft at 10:15PM Jul 26, 2021Observed: 2.99 ft at 10:30PM Jul 26, 2021Observed: 2.96 ft at 10:45PM Jul 26, 2021Observed: 2.94 ft at 11:00PM Jul 26, 2021Observed: 2.91 ft at 11:15PM Jul 26, 2021Observed: 2.89 ft at 11:30PM Jul 26, 2021Observed: 2.87 ft at 11:45PM Jul 26, 2021Observed: 2.84 ft at 12:00AM Jul 27, 2021Observed: 2.82 ft at 12:15AM Jul 27, 2021Observed: 2.8 ft at 12:30AM Jul 27, 2021Observed: 2.77 ft at 12:45AM Jul 27, 2021Observed: 2.75 ft at 1:00AM Jul 27, 2021Observed: 2.73 ft at 1:15AM Jul 27, 2021Observed: 2.7 ft at 1:30AM Jul 27, 2021Observed: 2.68 ft at 1:45AM Jul 27, 2021Observed: 2.66 ft at 2:00AM Jul 27, 2021Observed: 2.64 ft at 2:15AM Jul 27, 2021Observed: 2.61 ft at 2:30AM Jul 27, 2021Observed: 2.59 ft at 2:45AM Jul 27, 2021Observed: 2.57 ft at 3:00AM Jul 27, 2021Observed: 2.55 ft at 3:15AM Jul 27, 2021Observed: 2.53 ft at 3:30AM Jul 27, 2021Observed: 2.52 ft at 3:45AM Jul 27, 2021Observed: 2.5 ft at 4:00AM Jul 27, 2021Observed: 2.48 ft at 4:15AM Jul 27, 2021Observed: 2.46 ft at 4:30AM Jul 27, 2021Observed: 2.45 ft at 4:45AM Jul 27, 2021Observed: 2.43 ft at 5:00AM Jul 27, 2021Observed: 2.41 ft at 5:15AM Jul 27, 2021Observed: 2.4 ft at 5:30AM Jul 27, 2021Observed: 2.38 ft at 5:45AM Jul 27, 2021Observed: 2.37 ft at 6:00AM Jul 27, 2021Observed: 2.35 ft at 6:15AM Jul 27, 2021Observed: 2.34 ft at 6:30AM Jul 27, 2021Observed: 2.33 ft at 6:45AM Jul 27, 2021Observed: 2.31 ft at 7:00AM Jul 27, 2021Observed: 2.3 ft at 7:15AM Jul 27, 2021Observed: 2.29 ft at 7:30AM Jul 27, 2021Observed: 2.28 ft at 7:45AM Jul 27, 2021Observed: 2.27 ft at 8:00AM Jul 27, 2021Observed: 2.26 ft at 8:15AM Jul 27, 2021Observed: 2.25 ft at 8:30AM Jul 27, 2021Observed: 2.19 ft at 9:45AM Jul 27, 2021Observed: 2.19 ft at 10:00AM Jul 27, 2021Observed: 2.18 ft at 10:15AM Jul 27, 2021Observed: 2.17 ft at 10:30AM Jul 27, 2021Observed: 2.16 ft at 10:45AM Jul 27, 2021Observed: 2.15 ft at 11:00AM Jul 27, 2021Observed: 2.14 ft at 11:15AM Jul 27, 2021Observed: 2.13 ft at 11:30AM Jul 27, 2021Observed: 2.12 ft at 11:45AM Jul 27, 2021Observed: 2.11 ft at 12:00PM Jul 27, 2021Observed: 2.11 ft at 12:15PM Jul 27, 2021Observed: 2.1 ft at 12:30PM Jul 27, 2021Observed: 2.09 ft at 12:45PM Jul 27, 2021Observed: 2.08 ft at 1:00PM Jul 27, 2021Observed: 2.08 ft at 1:15PM Jul 27, 2021Observed: 2.07 ft at 1:30PM Jul 27, 2021Observed: 2.06 ft at 1:45PM Jul 27, 2021Observed: 2.06 ft at 2:00PM Jul 27, 2021Observed: 2.05 ft at 2:15PM Jul 27, 2021Observed: 2.04 ft at 2:30PM Jul 27, 2021Observed: 2.04 ft at 2:45PM Jul 27, 2021Observed: 2.03 ft at 3:00PM Jul 27, 2021Observed: 2.02 ft at 3:15PM Jul 27, 2021Observed: 2.02 ft at 3:30PM Jul 27, 2021Observed: 2.01 ft at 3:45PM Jul 27, 2021Observed: 2.01 ft at 4:00PM Jul 27, 2021Observed: 2 ft at 4:15PM Jul 27, 2021Observed: 2 ft at 4:30PM Jul 27, 2021Observed: 1.99 ft at 4:45PM Jul 27, 2021Observed: 1.98 ft at 5:00PM Jul 27, 2021Observed: 1.98 ft at 5:15PM Jul 27, 2021Observed: 1.97 ft at 5:30PM Jul 27, 2021Observed: 1.97 ft at 5:45PM Jul 27, 2021Observed: 1.97 ft at 6:00PM Jul 27, 2021Observed: 1.96 ft at 6:15PM Jul 27, 2021Observed: 1.95 ft at 6:30PM Jul 27, 2021Observed: 1.95 ft at 6:45PM Jul 27, 2021Observed: 1.95 ft at 7:00PM Jul 27, 2021Observed: 1.94 ft at 7:15PM Jul 27, 2021Observed: 1.94 ft at 7:30PM Jul 27, 2021Observed: 1.93 ft at 7:45PM Jul 27, 2021Observed: 1.93 ft at 8:00PM Jul 27, 2021Observed: 1.93 ft at 8:15PM Jul 27, 2021Observed: 1.92 ft at 8:30PM Jul 27, 2021Observed: 1.92 ft at 8:45PM Jul 27, 2021Observed: 1.92 ft at 8:46PM Jul 27, 2021Observed: 1.92 ft at 9:00PM Jul 27, 2021Observed: 1.91 ft at 9:15PM Jul 27, 2021Observed: 1.91 ft at 9:30PM Jul 27, 2021Observed: 1.91 ft at 9:45PM Jul 27, 2021Observed: 1.91 ft at 10:00PM Jul 27, 2021Observed: 1.9 ft at 10:15PM Jul 27, 2021Observed: 1.9 ft at 10:30PM Jul 27, 2021Observed: 1.9 ft at 10:45PM Jul 27, 2021Observed: 1.89 ft at 11:00PM Jul 27, 2021Observed: 1.89 ft at 11:15PM Jul 27, 2021Observed: 1.89 ft at 11:30PM Jul 27, 2021Observed: 1.89 ft at 11:45PM Jul 27, 2021Observed: 1.88 ft at 12:00AM Jul 28, 2021Observed: 1.88 ft at 12:15AM Jul 28, 2021Observed: 1.88 ft at 12:30AM Jul 28, 2021Observed: 1.87 ft at 12:45AM Jul 28, 2021Observed: 1.87 ft at 1:00AM Jul 28, 2021Observed: 1.87 ft at 1:15AM Jul 28, 2021Observed: 1.87 ft at 1:30AM Jul 28, 2021Observed: 1.87 ft at 1:45AM Jul 28, 2021Observed: 1.86 ft at 2:00AM Jul 28, 2021Observed: 1.86 ft at 2:15AM Jul 28, 2021Observed: 1.86 ft at 2:30AM Jul 28, 2021Observed: 1.85 ft at 2:45AM Jul 28, 2021Observed: 1.85 ft at 3:00AM Jul 28, 2021Observed: 1.85 ft at 3:15AM Jul 28, 2021Observed: 1.85 ft at 3:30AM Jul 28, 2021Observed: 1.84 ft at 3:45AM Jul 28, 2021Observed: 1.84 ft at 4:00AM Jul 28, 2021Observed: 1.84 ft at 4:15AM Jul 28, 2021Observed: 1.84 ft at 4:30AM Jul 28, 2021Observed: 1.83 ft at 4:45AM Jul 28, 2021Observed: 1.83 ft at 5:00AM Jul 28, 2021Observed: 1.83 ft at 5:15AM Jul 28, 2021Observed: 1.82 ft at 5:30AM Jul 28, 2021Observed: 1.82 ft at 5:45AM Jul 28, 2021Observed: 1.82 ft at 6:00AM Jul 28, 2021Observed: 1.82 ft at 6:15AM Jul 28, 2021Observed: 1.82 ft at 6:30AM Jul 28, 2021Observed: 1.81 ft at 6:45AM Jul 28, 2021Observed: 1.81 ft at 7:00AM Jul 28, 2021Observed: 1.81 ft at 7:15AM Jul 28, 2021Observed: 1.81 ft at 7:30AM Jul 28, 2021Observed: 1.81 ft at 7:45AM Jul 28, 2021Observed: 1.81 ft at 8:00AM Jul 28, 2021Observed: 1.8 ft at 8:15AM Jul 28, 2021Observed: 1.8 ft at 8:30AM Jul 28, 2021Observed: 1.8 ft at 8:45AM Jul 28, 2021Observed: 1.8 ft at 9:00AM Jul 28, 2021Observed: 1.8 ft at 9:15AM Jul 28, 2021Observed: 1.8 ft at 9:30AM Jul 28, 2021Observed: 1.79 ft at 9:45AM Jul 28, 2021Observed: 1.79 ft at 10:00AM Jul 28, 2021Observed: 1.79 ft at 10:15AM Jul 28, 2021Observed: 1.79 ft at 10:30AM Jul 28, 2021Observed: 1.79 ft at 10:45AM Jul 28, 2021Observed: 1.79 ft at 11:00AM Jul 28, 2021Observed: 1.78 ft at 11:15AM Jul 28, 2021Observed: 1.78 ft at 11:30AM Jul 28, 2021Observed: 1.78 ft at 11:45AM Jul 28, 2021Observed: 1.78 ft at 12:00PM Jul 28, 2021Observed: 1.78 ft at 12:15PM Jul 28, 2021Observed: 1.78 ft at 12:30PM Jul 28, 2021Observed: 1.77 ft at 12:45PM Jul 28, 2021Observed: 1.77 ft at 1:00PM Jul 28, 2021Observed: 1.77 ft at 1:15PM Jul 28, 2021Observed: 1.77 ft at 1:30PM Jul 28, 2021Observed: 1.77 ft at 1:45PM Jul 28, 2021Observed: 1.76 ft at 2:00PM Jul 28, 2021Observed: 1.76 ft at 2:15PM Jul 28, 2021Observed: 1.76 ft at 2:30PM Jul 28, 2021Observed: 1.76 ft at 2:45PM Jul 28, 2021Observed: 1.76 ft at 3:00PM Jul 28, 2021Observed: 1.76 ft at 3:15PM Jul 28, 2021Observed: 1.75 ft at 3:30PM Jul 28, 2021Observed: 1.75 ft at 3:45PM Jul 28, 2021Observed: 1.75 ft at 4:00PM Jul 28, 2021Observed: 1.75 ft at 4:15PM Jul 28, 2021Observed: 1.75 ft at 4:30PM Jul 28, 2021Observed: 1.74 ft at 4:45PM Jul 28, 2021Observed: 1.74 ft at 5:00PM Jul 28, 2021Observed: 1.74 ft at 5:15PM Jul 28, 2021Observed: 1.74 ft at 5:30PM Jul 28, 2021Observed: 1.74 ft at 5:45PM Jul 28, 2021Observed: 1.74 ft at 6:00PM Jul 28, 2021Observed: 1.74 ft at 6:15PM Jul 28, 2021Observed: 1.73 ft at 6:30PM Jul 28, 2021Observed: 1.73 ft at 6:45PM Jul 28, 2021Observed: 1.73 ft at 7:00PM Jul 28, 2021Observed: 1.73 ft at 7:15PM Jul 28, 2021Observed: 1.73 ft at 7:30PM Jul 28, 2021Observed: 1.73 ft at 7:45PM Jul 28, 2021Observed: 1.73 ft at 8:00PM Jul 28, 2021Observed: 1.73 ft at 8:15PM Jul 28, 2021Observed: 1.73 ft at 8:30PM Jul 28, 2021Observed: 1.73 ft at 8:45PM Jul 28, 2021Observed: 1.73 ft at 8:46PM Jul 28, 2021Observed: 1.73 ft at 9:00PM Jul 28, 2021Observed: 1.73 ft at 9:15PM Jul 28, 2021Observed: 1.74 ft at 9:30PM Jul 28, 2021Observed: 1.74 ft at 9:45PM Jul 28, 2021Observed: 1.74 ft at 10:00PM Jul 28, 2021Observed: 1.74 ft at 10:15PM Jul 28, 2021Observed: 1.74 ft at 10:30PM Jul 28, 2021Observed: 1.73 ft at 10:45PM Jul 28, 2021Observed: 1.73 ft at 11:00PM Jul 28, 2021Observed: 1.73 ft at 11:15PM Jul 28, 2021Observed: 1.73 ft at 11:30PM Jul 28, 2021Observed: 1.73 ft at 11:45PM Jul 28, 2021Observed: 1.73 ft at 12:00AM Jul 29, 2021Observed: 1.72 ft at 12:15AM Jul 29, 2021Observed: 1.73 ft at 12:30AM Jul 29, 2021Observed: 1.73 ft at 12:45AM Jul 29, 2021Observed: 1.73 ft at 1:00AM Jul 29, 2021Observed: 1.73 ft at 1:15AM Jul 29, 2021Observed: 1.73 ft at 1:30AM Jul 29, 2021Observed: 1.73 ft at 1:45AM Jul 29, 2021Observed: 1.73 ft at 2:00AM Jul 29, 2021Observed: 1.73 ft at 2:15AM Jul 29, 2021Observed: 1.73 ft at 2:30AM Jul 29, 2021Observed: 1.73 ft at 2:45AM Jul 29, 2021Observed: 1.73 ft at 3:00AM Jul 29, 2021Observed: 1.73 ft at 3:15AM Jul 29, 2021Observed: 1.73 ft at 3:30AM Jul 29, 2021Observed: 1.73 ft at 3:45AM Jul 29, 2021Observed: 1.73 ft at 4:00AM Jul 29, 2021Observed: 1.73 ft at 4:15AM Jul 29, 2021Observed: 1.73 ft at 4:30AM Jul 29, 2021Observed: 1.72 ft at 4:45AM Jul 29, 2021Observed: 1.72 ft at 4:46AM Jul 29, 2021Observed: 1.72 ft at 5:00AM Jul 29, 2021Observed: 1.72 ft at 5:15AM Jul 29, 2021Observed: 1.72 ft at 5:30AM Jul 29, 2021Observed: 1.72 ft at 5:45AM Jul 29, 2021Observed: 1.71 ft at 6:00AM Jul 29, 2021Observed: 1.71 ft at 6:15AM Jul 29, 2021Observed: 1.7 ft at 6:30AM Jul 29, 2021Observed: 1.7 ft at 6:45AM Jul 29, 2021Observed: 1.7 ft at 7:00AM Jul 29, 2021Observed: 1.7 ft at 7:15AM Jul 29, 2021Observed: 1.69 ft at 7:30AM Jul 29, 2021Observed: 1.69 ft at 7:45AM Jul 29, 2021Observed: 1.69 ft at 8:00AM Jul 29, 2021Observed: 1.69 ft at 8:15AM Jul 29, 2021Observed: 1.69 ft at 8:30AM Jul 29, 2021Observed: 1.69 ft at 8:45AM Jul 29, 2021Observed: 1.69 ft at 9:00AM Jul 29, 2021Observed: 1.69 ft at 9:15AM Jul 29, 2021Observed: 1.7 ft at 9:30AM Jul 29, 2021Observed: 1.7 ft at 9:45AM Jul 29, 2021Observed: 1.7 ft at 10:00AM Jul 29, 2021Observed: 1.7 ft at 10:15AM Jul 29, 2021Observed: 1.7 ft at 10:30AM Jul 29, 2021Observed: 1.7 ft at 10:45AM Jul 29, 2021Observed: 1.7 ft at 11:00AM Jul 29, 2021Observed: 1.7 ft at 11:15AM Jul 29, 2021Observed: 1.69 ft at 11:30AM Jul 29, 2021Observed: 1.69 ft at 11:45AM Jul 29, 2021Observed: 1.69 ft at 12:00PM Jul 29, 2021Observed: 1.68 ft at 12:15PM Jul 29, 2021Observed: 1.68 ft at 12:30PM Jul 29, 2021Observed: 1.68 ft at 12:45PM Jul 29, 2021Observed: 1.68 ft at 12:46PM Jul 29, 2021Observed: 1.68 ft at 1:00PM Jul 29, 2021Observed: 1.68 ft at 1:15PM Jul 29, 2021Observed: 1.68 ft at 1:30PM Jul 29, 2021Observed: 1.68 ft at 1:45PM Jul 29, 2021Observed: 1.67 ft at 2:00PM Jul 29, 2021Observed: 1.67 ft at 2:15PM Jul 29, 2021Observed: 1.67 ft at 2:30PM Jul 29, 2021Observed: 1.67 ft at 2:45PM Jul 29, 2021Observed: 1.67 ft at 3:00PM Jul 29, 2021Observed: 1.67 ft at 3:15PM Jul 29, 2021Observed: 1.67 ft at 3:30PM Jul 29, 2021Observed: 1.69 ft at 3:45PM Jul 29, 2021Observed: 1.69 ft at 4:00PM Jul 29, 2021Observed: 1.69 ft at 4:15PM Jul 29, 2021Observed: 1.7 ft at 4:30PM Jul 29, 2021Observed: 1.7 ft at 4:45PM Jul 29, 2021Observed: 1.7 ft at 5:00PM Jul 29, 2021Observed: 1.71 ft at 5:15PM Jul 29, 2021Observed: 1.72 ft at 5:30PM Jul 29, 2021Observed: 1.73 ft at 5:45PM Jul 29, 2021Observed: 1.75 ft at 6:00PM Jul 29, 2021Observed: 1.77 ft at 6:15PM Jul 29, 2021Observed: 1.78 ft at 6:30PM Jul 29, 2021Observed: 1.8 ft at 6:45PM Jul 29, 2021Observed: 1.81 ft at 7:00PM Jul 29, 2021Observed: 1.82 ft at 7:15PM Jul 29, 2021Observed: 1.82 ft at 7:30PM Jul 29, 2021Observed: 1.83 ft at 7:45PM Jul 29, 2021Observed: 1.83 ft at 8:00PM Jul 29, 2021Observed: 1.83 ft at 8:15PM Jul 29, 2021Observed: 1.83 ft at 8:30PM Jul 29, 2021Observed: 1.82 ft at 8:45PM Jul 29, 2021Observed: 1.82 ft at 8:46PM Jul 29, 2021Observed: 1.81 ft at 9:00PM Jul 29, 2021Observed: 1.81 ft at 9:15PM Jul 29, 2021Observed: 1.8 ft at 9:30PM Jul 29, 2021Observed: 1.79 ft at 9:45PM Jul 29, 2021Observed: 1.79 ft at 10:00PM Jul 29, 2021Observed: 1.78 ft at 10:15PM Jul 29, 2021Observed: 1.77 ft at 10:30PM Jul 29, 2021Observed: 1.77 ft at 10:45PM Jul 29, 2021Observed: 1.76 ft at 11:00PM Jul 29, 2021Observed: 1.76 ft at 11:15PM Jul 29, 2021Observed: 1.75 ft at 11:30PM Jul 29, 2021Observed: 1.75 ft at 11:45PM Jul 29, 2021Observed: 1.74 ft at 12:00AM Jul 30, 2021Observed: 1.74 ft at 12:15AM Jul 30, 2021Observed: 1.73 ft at 12:30AM Jul 30, 2021Observed: 1.72 ft at 12:45AM Jul 30, 2021Observed: 1.72 ft at 1:00AM Jul 30, 2021Observed: 1.72 ft at 1:15AM Jul 30, 2021Observed: 1.71 ft at 1:30AM Jul 30, 2021Observed: 1.71 ft at 1:45AM Jul 30, 2021Observed: 1.71 ft at 2:00AM Jul 30, 2021Observed: 1.71 ft at 2:15AM Jul 30, 2021Observed: 1.7 ft at 2:30AM Jul 30, 2021Observed: 1.7 ft at 2:45AM Jul 30, 2021Observed: 1.7 ft at 3:00AM Jul 30, 2021Observed: 1.7 ft at 3:15AM Jul 30, 2021Observed: 1.7 ft at 3:30AM Jul 30, 2021Observed: 1.7 ft at 3:45AM Jul 30, 2021Observed: 1.7 ft at 4:00AM Jul 30, 2021Observed: 1.69 ft at 4:15AM Jul 30, 2021Observed: 1.7 ft at 4:30AM Jul 30, 2021Observed: 1.7 ft at 4:45AM Jul 30, 2021Observed: 1.7 ft at 4:46AM Jul 30, 2021Observed: 1.69 ft at 5:00AM Jul 30, 2021Observed: 1.69 ft at 5:15AM Jul 30, 2021Observed: 1.69 ft at 5:30AM Jul 30, 2021Observed: 1.69 ft at 5:45AM Jul 30, 2021Observed: 1.69 ft at 6:00AM Jul 30, 2021Observed: 1.69 ft at 6:15AM Jul 30, 2021Observed: 1.69 ft at 6:30AM Jul 30, 2021Observed: 1.69 ft at 6:45AM Jul 30, 2021Observed: 1.69 ft at 7:00AM Jul 30, 2021Observed: 1.69 ft at 7:15AM Jul 30, 2021Observed: 1.69 ft at 7:30AM Jul 30, 2021Observed: 1.7 ft at 7:45AM Jul 30, 2021Observed: 1.7 ft at 8:00AM Jul 30, 2021Observed: 1.7 ft at 8:15AM Jul 30, 2021Observed: 1.7 ft at 8:30AM Jul 30, 2021Observed: 1.7 ft at 8:45AM Jul 30, 2021Observed: 1.7 ft at 9:00AM Jul 30, 2021Observed: 1.71 ft at 9:15AM Jul 30, 2021Observed: 1.71 ft at 9:30AM Jul 30, 2021Observed: 1.71 ft at 9:45AM Jul 30, 2021Observed: 1.72 ft at 10:00AM Jul 30, 2021Observed: 1.72 ft at 10:15AM Jul 30, 2021Observed: 1.72 ft at 10:30AM Jul 30, 2021Observed: 1.72 ft at 10:45AM Jul 30, 2021Observed: 1.72 ft at 11:00AM Jul 30, 2021Observed: 1.72 ft at 11:15AM Jul 30, 2021Observed: 1.72 ft at 11:30AM Jul 30, 2021Observed: 1.73 ft at 11:45AM Jul 30, 2021Observed: 1.73 ft at 12:00PM Jul 30, 2021Observed: 1.73 ft at 12:15PM Jul 30, 2021Observed: 1.73 ft at 12:30PM Jul 30, 2021Observed: 1.73 ft at 12:45PM Jul 30, 2021Observed: 1.73 ft at 12:46PM Jul 30, 2021Observed: 1.73 ft at 1:00PM Jul 30, 2021Observed: 1.73 ft at 1:15PM Jul 30, 2021Observed: 1.73 ft at 1:30PM Jul 30, 2021Observed: 1.73 ft at 1:45PM Jul 30, 2021Observed: 1.74 ft at 2:00PM Jul 30, 2021Observed: 1.73 ft at 2:15PM Jul 30, 2021Observed: 1.73 ft at 2:30PM Jul 30, 2021Observed: 1.74 ft at 2:45PM Jul 30, 2021Observed: 1.73 ft at 3:00PM Jul 30, 2021Observed: 1.74 ft at 3:15PM Jul 30, 2021Observed: 1.73 ft at 3:30PM Jul 30, 2021Observed: 1.73 ft at 3:45PM Jul 30, 2021Observed: 1.73 ft at 4:00PM Jul 30, 2021Observed: 1.73 ft at 4:15PM Jul 30, 2021Observed: 1.73 ft at 4:30PM Jul 30, 2021Observed: 1.73 ft at 4:45PM Jul 30, 2021Observed: 1.73 ft at 5:00PM Jul 30, 2021Observed: 1.73 ft at 5:15PM Jul 30, 2021Observed: 1.73 ft at 5:30PM Jul 30, 2021Observed: 1.73 ft at 5:45PM Jul 30, 2021Observed: 1.73 ft at 6:00PM Jul 30, 2021Observed: 1.73 ft at 6:15PM Jul 30, 2021Observed: 1.73 ft at 6:30PM Jul 30, 2021Observed: 1.74 ft at 6:45PM Jul 30, 2021Observed: 1.73 ft at 7:00PM Jul 30, 2021Observed: 1.74 ft at 7:15PM Jul 30, 2021Observed: 1.74 ft at 7:30PM Jul 30, 2021Observed: 1.74 ft at 7:45PM Jul 30, 2021Observed: 1.74 ft at 8:00PM Jul 30, 2021Observed: 1.74 ft at 8:15PM Jul 30, 2021Observed: 1.74 ft at 8:30PM Jul 30, 2021Observed: 1.74 ft at 8:45PM Jul 30, 2021Observed: 1.74 ft at 9:00PM Jul 30, 2021Observed: 1.74 ft at 9:15PM Jul 30, 2021Observed: 1.75 ft at 9:30PM Jul 30, 2021Observed: 1.75 ft at 9:45PM Jul 30, 2021Observed: 1.75 ft at 10:00PM Jul 30, 2021Observed: 1.76 ft at 10:15PM Jul 30, 2021Observed: 1.76 ft at 10:30PM Jul 30, 2021Observed: 1.77 ft at 10:45PM Jul 30, 2021Observed: 1.77 ft at 11:00PM Jul 30, 2021Observed: 1.78 ft at 11:15PM Jul 30, 2021Observed: 1.78 ft at 11:30PM Jul 30, 2021Highest Forecast: 1.7 ft 2:00AM Jul 31, 2021Highest Forecast: 1.7 ft 8:00AM Jul 31, 2021Forecast: 1.6 ft 2:00PM Jul 31, 2021Forecast: 1.6 ft 8:00PM Jul 31, 2021Forecast: 1.6 ft 2:00AM Aug 01, 2021Forecast: 1.6 ft 8:00AM Aug 01, 2021Forecast: 1.6 ft 2:00PM Aug 01, 2021Forecast: 1.6 ft 8:00PM Aug 01, 2021Highest Forecast: 1.7 ft 2:00AM Aug 02, 2021Highest Forecast: 1.7 ft 8:00AM Aug 02, 2021USGS--Water Resources of the United StatesFDKM2(plotting HGIRG) Graph Created (12:41AM Jul 31, 2021)ObservedForecast (issued 10:57AM Jul 30)Latest observed value: 1.78 ft at 11:30 PM EDT 30-Jul-2021. Flood Stage is 15 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Monocacy River near Frederick at Interstate 70 are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Monocacy Blvd. in Frederick Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 17
Flood Stage: 15
Action Stage: 13
Low Stage (in feet): -9999

Historic Crests
(1) 35.90 ft on 06/23/1972
(2) 30.80 ft on 09/26/1975
(3) 28.10 ft on 08/24/1933
(4) 25.38 ft on 10/10/1976
(5) 23.67 ft on 01/20/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.83 ft on 05/01/2020 (P)
(2) 16.62 ft on 05/06/2019
(3) 16.59 ft on 03/22/2019
(4) 16.38 ft on 12/17/2018
(5) 15.57 ft on 11/25/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.50 ft on 09/11/1966

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
30 Water reaches the second floor of Gambrill Mill on the Monocacy National Battlefield.
24 Water approaches Urbana Pike near Monocacy National Battlefield.
21 Maryland Route 26 is flooded near the Monocacy River bridge.
20 Water reaches Gambrill Mill on the Monocacy National Battlefield.
17 Significant lowland flooding is occurring along the river, with backwater flooding also occurring. Numerous roads are closed. Water is approaching the parking lot at Gambrill Mill on the Monocacy National Battlefield. Backwater flooding from Carroll Creek is likely approaching the underside of the bridge leading to the Frederick city wastewater treatment plant.
16 Much of Pinecliff Park and Rivermist Park in Frederick are flooded. Buckeystown Community Park is also flooded with water approaching the parking lot. Waters are also approaching the Frederick city wastewater treatment plant and the Ballenger Creek wastewater treatment plant. Significant backwater flooding is occurring. Several roads will be closed along the river and adjoining creeks.
15 Both banks of the river are flooded. Water begins to flood low-lying fields at Monocacy National Battlefield. Water reaches the access road of the Frederick city wastewater treatment plant. Backwater flooding is occurring on several area creeks, particularly Carroll Creek in Frederick.
14 Two low-water crossings, one on Michaels Mill Road /State Route 880/ in Buckeystown, and one on Retreat Road north of Frederick, begin to flood.
13 Water covers portions of Pinecliff Park in southeast Frederick. Water also approaches Rivermist Park in northeast Frederick.
10 The east side of the Monocacy River, or left bank, begins to flood east of Frederick. Although no structures are affected, water approaches an access road at Pinecliff Park.
5 After rain events, the river may become hazardous for recreational purposes when stages are over 5 feet.
About This Location Collapse

Latitude: 39.402778° N, Longitude: 77.366111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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 29 231.92 ft 246.92 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
(703) 996-2200
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:30 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities