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 Inundation
Mapping
Winnebago River (Northern IA) at Mason City Stage (ft)Flow (cfs)Observed: 5.47 ft at 9:00PM Oct 12, 2019Observed: 5.51 ft at 9:15PM Oct 12, 2019Observed: 5.48 ft at 9:30PM Oct 12, 2019Highest Observation: 5.52 ft at 9:45PM Oct 12, 2019Observed: 5.46 ft at 10:00PM Oct 12, 2019Observed: 5.5 ft at 10:15PM Oct 12, 2019Observed: 5.49 ft at 10:30PM Oct 12, 2019Observed: 5.49 ft at 10:45PM Oct 12, 2019Observed: 5.46 ft at 11:00PM Oct 12, 2019Observed: 5.47 ft at 11:15PM Oct 12, 2019Observed: 5.51 ft at 11:30PM Oct 12, 2019Observed: 5.51 ft at 11:45PM Oct 12, 2019Observed: 5.46 ft at 12:00AM Oct 13, 2019Observed: 5.44 ft at 12:15AM Oct 13, 2019Observed: 5.48 ft at 12:30AM Oct 13, 2019Observed: 5.47 ft at 12:45AM Oct 13, 2019Observed: 5.47 ft at 1:00AM Oct 13, 2019Observed: 5.45 ft at 1:15AM Oct 13, 2019Observed: 5.47 ft at 1:30AM Oct 13, 2019Observed: 5.44 ft at 1:45AM Oct 13, 2019Observed: 5.43 ft at 2:00AM Oct 13, 2019Observed: 5.47 ft at 2:15AM Oct 13, 2019Observed: 5.47 ft at 2:30AM Oct 13, 2019Observed: 5.43 ft at 2:45AM Oct 13, 2019Observed: 5.45 ft at 3:00AM Oct 13, 2019Observed: 5.45 ft at 3:15AM Oct 13, 2019Observed: 5.47 ft at 3:30AM Oct 13, 2019Observed: 5.44 ft at 3:45AM Oct 13, 2019Observed: 5.47 ft at 4:00AM Oct 13, 2019Observed: 5.47 ft at 4:15AM Oct 13, 2019Observed: 5.44 ft at 4:30AM Oct 13, 2019Observed: 5.43 ft at 4:45AM Oct 13, 2019Observed: 5.44 ft at 5:00AM Oct 13, 2019Observed: 5.42 ft at 5:15AM Oct 13, 2019Observed: 5.45 ft at 5:30AM Oct 13, 2019Observed: 5.43 ft at 5:45AM Oct 13, 2019Observed: 5.43 ft at 6:00AM Oct 13, 2019Observed: 5.43 ft at 6:15AM Oct 13, 2019Observed: 5.43 ft at 6:30AM Oct 13, 2019Observed: 5.42 ft at 6:45AM Oct 13, 2019Observed: 5.4 ft at 7:00AM Oct 13, 2019Observed: 5.44 ft at 7:15AM Oct 13, 2019Observed: 5.42 ft at 7:30AM Oct 13, 2019Observed: 5.39 ft at 7:45AM Oct 13, 2019Observed: 5.42 ft at 8:00AM Oct 13, 2019Observed: 5.41 ft at 8:15AM Oct 13, 2019Observed: 5.41 ft at 8:30AM Oct 13, 2019Observed: 5.4 ft at 8:45AM Oct 13, 2019Observed: 5.39 ft at 9:00AM Oct 13, 2019Observed: 5.41 ft at 9:15AM Oct 13, 2019Observed: 5.42 ft at 9:30AM Oct 13, 2019Observed: 5.39 ft at 9:45AM Oct 13, 2019Observed: 5.37 ft at 10:00AM Oct 13, 2019Observed: 5.41 ft at 10:15AM Oct 13, 2019Observed: 5.38 ft at 10:30AM Oct 13, 2019Observed: 5.36 ft at 10:45AM Oct 13, 2019Observed: 5.37 ft at 11:00AM Oct 13, 2019Observed: 5.35 ft at 11:15AM Oct 13, 2019Observed: 5.39 ft at 11:30AM Oct 13, 2019Observed: 5.36 ft at 11:45AM Oct 13, 2019Observed: 5.39 ft at 12:00PM Oct 13, 2019Observed: 5.34 ft at 12:15PM Oct 13, 2019Observed: 5.38 ft at 12:30PM Oct 13, 2019Observed: 5.37 ft at 12:45PM Oct 13, 2019Observed: 5.36 ft at 1:00PM Oct 13, 2019Observed: 5.34 ft at 1:15PM Oct 13, 2019Observed: 5.37 ft at 1:30PM Oct 13, 2019Observed: 5.34 ft at 1:45PM Oct 13, 2019Observed: 5.37 ft at 2:00PM Oct 13, 2019Observed: 5.37 ft at 2:15PM Oct 13, 2019Observed: 5.33 ft at 2:30PM Oct 13, 2019Observed: 5.33 ft at 2:45PM Oct 13, 2019Observed: 5.34 ft at 3:00PM Oct 13, 2019Observed: 5.32 ft at 3:15PM Oct 13, 2019Observed: 5.31 ft at 3:30PM Oct 13, 2019Observed: 5.36 ft at 3:45PM Oct 13, 2019Observed: 5.34 ft at 4:00PM Oct 13, 2019Observed: 5.33 ft at 4:15PM Oct 13, 2019Observed: 5.33 ft at 4:30PM Oct 13, 2019Observed: 5.33 ft at 4:45PM Oct 13, 2019Observed: 5.31 ft at 5:00PM Oct 13, 2019Observed: 5.34 ft at 5:15PM Oct 13, 2019Observed: 5.32 ft at 5:30PM Oct 13, 2019Observed: 5.29 ft at 5:45PM Oct 13, 2019Observed: 5.31 ft at 6:00PM Oct 13, 2019Observed: 5.3 ft at 6:15PM Oct 13, 2019Observed: 5.31 ft at 6:30PM Oct 13, 2019Observed: 5.34 ft at 6:45PM Oct 13, 2019Observed: 5.31 ft at 7:00PM Oct 13, 2019Observed: 5.28 ft at 7:15PM Oct 13, 2019Observed: 5.29 ft at 7:30PM Oct 13, 2019Observed: 5.33 ft at 7:45PM Oct 13, 2019Observed: 5.3 ft at 8:00PM Oct 13, 2019Observed: 5.27 ft at 8:15PM Oct 13, 2019Observed: 5.31 ft at 8:30PM Oct 13, 2019Observed: 5.32 ft at 8:45PM Oct 13, 2019Observed: 5.29 ft at 9:00PM Oct 13, 2019Observed: 5.29 ft at 9:15PM Oct 13, 2019Observed: 5.32 ft at 9:30PM Oct 13, 2019Observed: 5.31 ft at 9:45PM Oct 13, 2019Observed: 5.28 ft at 10:00PM Oct 13, 2019Observed: 5.27 ft at 10:15PM Oct 13, 2019Observed: 5.26 ft at 10:30PM Oct 13, 2019Observed: 5.29 ft at 10:45PM Oct 13, 2019Observed: 5.24 ft at 11:00PM Oct 13, 2019Observed: 5.24 ft at 11:15PM Oct 13, 2019Observed: 5.23 ft at 11:30PM Oct 13, 2019Observed: 5.3 ft at 11:45PM Oct 13, 2019Observed: 5.28 ft at 12:00AM Oct 14, 2019Observed: 5.28 ft at 12:15AM Oct 14, 2019Observed: 5.29 ft at 12:30AM Oct 14, 2019Observed: 5.28 ft at 12:45AM Oct 14, 2019Observed: 5.27 ft at 1:00AM Oct 14, 2019Observed: 5.25 ft at 1:15AM Oct 14, 2019Observed: 5.28 ft at 1:30AM Oct 14, 2019Observed: 5.25 ft at 1:45AM Oct 14, 2019Observed: 5.27 ft at 2:00AM Oct 14, 2019Observed: 5.24 ft at 2:15AM Oct 14, 2019Observed: 5.24 ft at 2:30AM Oct 14, 2019Observed: 5.23 ft at 2:45AM Oct 14, 2019Observed: 5.21 ft at 3:00AM Oct 14, 2019Observed: 5.21 ft at 3:15AM Oct 14, 2019Observed: 5.21 ft at 3:30AM Oct 14, 2019Observed: 5.22 ft at 3:45AM Oct 14, 2019Observed: 5.26 ft at 4:00AM Oct 14, 2019Observed: 5.22 ft at 4:15AM Oct 14, 2019Observed: 5.24 ft at 4:30AM Oct 14, 2019Observed: 5.2 ft at 4:45AM Oct 14, 2019Observed: 5.23 ft at 5:00AM Oct 14, 2019Observed: 5.21 ft at 5:15AM Oct 14, 2019Observed: 5.23 ft at 5:30AM Oct 14, 2019Observed: 5.18 ft at 5:45AM Oct 14, 2019Observed: 5.22 ft at 6:00AM Oct 14, 2019Observed: 5.22 ft at 6:15AM Oct 14, 2019Observed: 5.21 ft at 6:30AM Oct 14, 2019Observed: 5.16 ft at 6:45AM Oct 14, 2019Observed: 5.23 ft at 7:00AM Oct 14, 2019Observed: 5.22 ft at 7:15AM Oct 14, 2019Observed: 5.18 ft at 7:30AM Oct 14, 2019Observed: 5.17 ft at 7:45AM Oct 14, 2019Observed: 5.21 ft at 8:00AM Oct 14, 2019Observed: 5.21 ft at 8:15AM Oct 14, 2019Observed: 5.22 ft at 8:30AM Oct 14, 2019Observed: 5.21 ft at 8:45AM Oct 14, 2019Observed: 5.15 ft at 9:00AM Oct 14, 2019Observed: 5.22 ft at 9:15AM Oct 14, 2019Observed: 5.19 ft at 9:30AM Oct 14, 2019Observed: 5.19 ft at 9:45AM Oct 14, 2019Observed: 5.17 ft at 10:00AM Oct 14, 2019Observed: 5.15 ft at 10:15AM Oct 14, 2019Observed: 5.17 ft at 10:30AM Oct 14, 2019Observed: 5.18 ft at 10:45AM Oct 14, 2019Observed: 5.18 ft at 11:00AM Oct 14, 2019Observed: 5.15 ft at 11:15AM Oct 14, 2019Observed: 5.19 ft at 11:30AM Oct 14, 2019Observed: 5.14 ft at 11:45AM Oct 14, 2019Observed: 5.15 ft at 12:00PM Oct 14, 2019Observed: 5.16 ft at 12:15PM Oct 14, 2019Observed: 5.2 ft at 12:30PM Oct 14, 2019Observed: 5.14 ft at 12:45PM Oct 14, 2019Observed: 5.17 ft at 1:00PM Oct 14, 2019Observed: 5.2 ft at 1:15PM Oct 14, 2019Observed: 5.15 ft at 1:30PM Oct 14, 2019Observed: 5.15 ft at 1:45PM Oct 14, 2019Observed: 5.12 ft at 2:00PM Oct 14, 2019Observed: 5.13 ft at 2:15PM Oct 14, 2019Observed: 5.12 ft at 2:30PM Oct 14, 2019Observed: 5.14 ft at 2:45PM Oct 14, 2019Observed: 5.15 ft at 3:00PM Oct 14, 2019Observed: 5.16 ft at 3:15PM Oct 14, 2019Observed: 5.11 ft at 3:30PM Oct 14, 2019Observed: 5.11 ft at 3:45PM Oct 14, 2019Observed: 5.11 ft at 4:00PM Oct 14, 2019Observed: 5.12 ft at 4:15PM Oct 14, 2019Observed: 5.14 ft at 4:30PM Oct 14, 2019Observed: 5.13 ft at 4:45PM Oct 14, 2019Observed: 5.1 ft at 5:00PM Oct 14, 2019Observed: 5.1 ft at 5:15PM Oct 14, 2019Observed: 5.15 ft at 5:30PM Oct 14, 2019Observed: 5.15 ft at 5:45PM Oct 14, 2019Observed: 5.15 ft at 6:00PM Oct 14, 2019Observed: 5.11 ft at 6:15PM Oct 14, 2019Observed: 5.13 ft at 6:30PM Oct 14, 2019Observed: 5.09 ft at 6:45PM Oct 14, 2019Observed: 5.07 ft at 7:00PM Oct 14, 2019Observed: 5.12 ft at 7:15PM Oct 14, 2019Observed: 5.13 ft at 7:30PM Oct 14, 2019Observed: 5.12 ft at 7:45PM Oct 14, 2019Observed: 5.13 ft at 8:00PM Oct 14, 2019Observed: 5.1 ft at 8:15PM Oct 14, 2019Observed: 5.13 ft at 8:30PM Oct 14, 2019Observed: 5.11 ft at 8:45PM Oct 14, 2019Observed: 5.1 ft at 9:00PM Oct 14, 2019Observed: 5.08 ft at 9:15PM Oct 14, 2019Observed: 5.06 ft at 9:30PM Oct 14, 2019Observed: 5.1 ft at 9:45PM Oct 14, 2019Observed: 5.11 ft at 10:00PM Oct 14, 2019Observed: 5.08 ft at 10:15PM Oct 14, 2019Observed: 5.1 ft at 10:30PM Oct 14, 2019Observed: 5.1 ft at 10:45PM Oct 14, 2019Observed: 5.11 ft at 11:00PM Oct 14, 2019Observed: 5.07 ft at 11:15PM Oct 14, 2019Observed: 5.1 ft at 11:30PM Oct 14, 2019Observed: 5.08 ft at 11:45PM Oct 14, 2019Observed: 5.09 ft at 12:00AM Oct 15, 2019Observed: 5.09 ft at 12:15AM Oct 15, 2019Observed: 5.09 ft at 12:30AM Oct 15, 2019Observed: 5.08 ft at 12:45AM Oct 15, 2019Observed: 5.07 ft at 1:00AM Oct 15, 2019Observed: 5.05 ft at 1:15AM Oct 15, 2019Observed: 5.11 ft at 1:30AM Oct 15, 2019Observed: 5.07 ft at 1:45AM Oct 15, 2019Observed: 5.11 ft at 2:00AM Oct 15, 2019Observed: 5.07 ft at 2:15AM Oct 15, 2019Observed: 5.09 ft at 2:30AM Oct 15, 2019Observed: 5.06 ft at 2:45AM Oct 15, 2019Observed: 5.1 ft at 3:00AM Oct 15, 2019Observed: 5.07 ft at 3:15AM Oct 15, 2019Observed: 5.05 ft at 3:30AM Oct 15, 2019Observed: 5.05 ft at 3:45AM Oct 15, 2019Observed: 5.09 ft at 4:00AM Oct 15, 2019Observed: 5.07 ft at 4:15AM Oct 15, 2019Observed: 5.05 ft at 4:30AM Oct 15, 2019Observed: 5.07 ft at 4:45AM Oct 15, 2019Observed: 5.07 ft at 5:00AM Oct 15, 2019Observed: 5.05 ft at 5:15AM Oct 15, 2019Observed: 5.06 ft at 5:30AM Oct 15, 2019Observed: 5.04 ft at 5:45AM Oct 15, 2019Observed: 5.08 ft at 6:00AM Oct 15, 2019Observed: 5.06 ft at 6:15AM Oct 15, 2019Observed: 5.05 ft at 6:30AM Oct 15, 2019Observed: 5.03 ft at 6:45AM Oct 15, 2019Observed: 5.06 ft at 7:00AM Oct 15, 2019Observed: 5.05 ft at 7:15AM Oct 15, 2019Observed: 5.03 ft at 7:30AM Oct 15, 2019Observed: 5.02 ft at 7:45AM Oct 15, 2019Observed: 5.06 ft at 8:00AM Oct 15, 2019Observed: 5.07 ft at 8:15AM Oct 15, 2019Observed: 5.06 ft at 8:30AM Oct 15, 2019Observed: 5.05 ft at 8:45AM Oct 15, 2019Observed: 5.05 ft at 9:00AM Oct 15, 2019Observed: 5.03 ft at 9:15AM Oct 15, 2019Observed: 5.04 ft at 9:30AM Oct 15, 2019Observed: 5.02 ft at 9:45AM Oct 15, 2019Observed: 5.06 ft at 10:00AM Oct 15, 2019Observed: 5.01 ft at 10:15AM Oct 15, 2019Observed: 5.06 ft at 10:30AM Oct 15, 2019Observed: 5.02 ft at 10:45AM Oct 15, 2019Observed: 5.06 ft at 11:00AM Oct 15, 2019Observed: 5 ft at 11:15AM Oct 15, 2019Observed: 5.01 ft at 11:30AM Oct 15, 2019Observed: 5.01 ft at 11:45AM Oct 15, 2019Observed: 5.03 ft at 12:00PM Oct 15, 2019Observed: 5 ft at 12:15PM Oct 15, 2019Observed: 5 ft at 12:30PM Oct 15, 2019Observed: 5.05 ft at 12:45PM Oct 15, 2019Observed: 5.03 ft at 1:00PM Oct 15, 2019Observed: 5.02 ft at 1:15PM Oct 15, 2019Observed: 5.01 ft at 1:30PM Oct 15, 2019Observed: 4.99 ft at 1:45PM Oct 15, 2019Observed: 5.04 ft at 2:00PM Oct 15, 2019Observed: 5 ft at 2:15PM Oct 15, 2019Observed: 4.99 ft at 2:30PM Oct 15, 2019Observed: 5.04 ft at 2:45PM Oct 15, 2019Observed: 4.99 ft at 3:00PM Oct 15, 2019Observed: 4.97 ft at 3:15PM Oct 15, 2019Observed: 4.98 ft at 3:30PM Oct 15, 2019Observed: 5.01 ft at 3:45PM Oct 15, 2019Observed: 5.02 ft at 4:00PM Oct 15, 2019Observed: 4.97 ft at 4:15PM Oct 15, 2019Observed: 5 ft at 4:30PM Oct 15, 2019Observed: 4.97 ft at 4:45PM Oct 15, 2019Observed: 5 ft at 5:00PM Oct 15, 2019Observed: 4.96 ft at 5:15PM Oct 15, 2019Observed: 5 ft at 5:30PM Oct 15, 2019Observed: 4.97 ft at 5:45PM Oct 15, 2019Observed: 4.96 ft at 6:00PM Oct 15, 2019Observed: 5.01 ft at 6:15PM Oct 15, 2019Observed: 4.99 ft at 6:30PM Oct 15, 2019Observed: 4.96 ft at 6:45PM Oct 15, 2019Observed: 4.98 ft at 7:00PM Oct 15, 2019Observed: 5.02 ft at 7:15PM Oct 15, 2019Observed: 4.95 ft at 7:30PM Oct 15, 2019Observed: 4.93 ft at 7:45PM Oct 15, 2019Observed: 4.97 ft at 8:00PM Oct 15, 2019Observed: 4.94 ft at 8:15PM Oct 15, 2019Observed: 4.97 ft at 8:30PM Oct 15, 2019Observed: 4.94 ft at 8:45PM Oct 15, 2019Observed: 4.96 ft at 9:00PM Oct 15, 2019Observed: 4.93 ft at 9:15PM Oct 15, 2019Observed: 4.96 ft at 9:30PM Oct 15, 2019Observed: 4.92 ft at 9:45PM Oct 15, 2019Observed: 4.92 ft at 10:00PM Oct 15, 2019Observed: 4.93 ft at 10:15PM Oct 15, 2019Observed: 4.97 ft at 10:30PM Oct 15, 2019Observed: 4.94 ft at 10:45PM Oct 15, 2019Observed: 4.96 ft at 11:00PM Oct 15, 2019Observed: 4.94 ft at 11:15PM Oct 15, 2019Observed: 4.96 ft at 11:30PM Oct 15, 2019Observed: 4.94 ft at 11:45PM Oct 15, 2019Observed: 4.91 ft at 12:00AM Oct 16, 2019Observed: 4.96 ft at 12:15AM Oct 16, 2019Observed: 4.89 ft at 12:30AM Oct 16, 2019Observed: 4.92 ft at 12:45AM Oct 16, 2019Observed: 4.94 ft at 1:00AM Oct 16, 2019Observed: 4.91 ft at 1:15AM Oct 16, 2019Observed: 4.94 ft at 1:30AM Oct 16, 2019Observed: 4.9 ft at 1:45AM Oct 16, 2019Observed: 4.93 ft at 2:00AM Oct 16, 2019Observed: 4.9 ft at 2:15AM Oct 16, 2019Observed: 4.94 ft at 2:30AM Oct 16, 2019Observed: 4.93 ft at 2:45AM Oct 16, 2019Observed: 4.91 ft at 3:00AM Oct 16, 2019Observed: 4.94 ft at 3:15AM Oct 16, 2019Observed: 4.93 ft at 3:30AM Oct 16, 2019Observed: 4.9 ft at 3:45AM Oct 16, 2019Observed: 4.93 ft at 4:00AM Oct 16, 2019Observed: 4.91 ft at 4:15AM Oct 16, 2019Observed: 4.92 ft at 4:30AM Oct 16, 2019Observed: 4.9 ft at 4:45AM Oct 16, 2019Observed: 4.93 ft at 5:00AM Oct 16, 2019Observed: 4.9 ft at 5:15AM Oct 16, 2019Observed: 4.91 ft at 5:30AM Oct 16, 2019Observed: 4.92 ft at 5:45AM Oct 16, 2019Observed: 4.89 ft at 6:00AM Oct 16, 2019Observed: 4.91 ft at 6:15AM Oct 16, 2019Observed: 4.9 ft at 6:30AM Oct 16, 2019Observed: 4.94 ft at 6:45AM Oct 16, 2019Observed: 4.91 ft at 7:00AM Oct 16, 2019Observed: 4.87 ft at 7:15AM Oct 16, 2019Observed: 4.91 ft at 7:30AM Oct 16, 2019Observed: 4.88 ft at 7:45AM Oct 16, 2019Observed: 4.9 ft at 8:00AM Oct 16, 2019Observed: 4.87 ft at 8:15AM Oct 16, 2019Observed: 4.9 ft at 8:30AM Oct 16, 2019Observed: 4.89 ft at 8:45AM Oct 16, 2019Observed: 4.87 ft at 9:00AM Oct 16, 2019Observed: 4.89 ft at 9:15AM Oct 16, 2019Observed: 4.91 ft at 9:30AM Oct 16, 2019Observed: 4.89 ft at 9:45AM Oct 16, 2019Observed: 4.88 ft at 10:00AM Oct 16, 2019Observed: 4.93 ft at 10:15AM Oct 16, 2019Observed: 4.92 ft at 10:30AM Oct 16, 2019Observed: 4.93 ft at 10:45AM Oct 16, 2019Observed: 4.88 ft at 11:00AM Oct 16, 2019Observed: 4.89 ft at 11:15AM Oct 16, 2019Observed: 4.92 ft at 11:30AM Oct 16, 2019Observed: 4.87 ft at 11:45AM Oct 16, 2019Observed: 4.87 ft at 12:00PM Oct 16, 2019Observed: 4.92 ft at 12:15PM Oct 16, 2019Observed: 4.86 ft at 12:30PM Oct 16, 2019Observed: 4.86 ft at 12:45PM Oct 16, 2019Observed: 4.85 ft at 1:00PM Oct 16, 2019Observed: 4.89 ft at 1:15PM Oct 16, 2019Observed: 4.91 ft at 1:30PM Oct 16, 2019Observed: 4.91 ft at 1:45PM Oct 16, 2019Observed: 4.85 ft at 2:00PM Oct 16, 2019Observed: 4.85 ft at 2:15PM Oct 16, 2019Observed: 4.89 ft at 2:30PM Oct 16, 2019Observed: 4.87 ft at 2:45PM Oct 16, 2019Observed: 4.9 ft at 3:00PM Oct 16, 2019Observed: 4.86 ft at 3:15PM Oct 16, 2019Observed: 4.85 ft at 3:30PM Oct 16, 2019Observed: 4.88 ft at 3:45PM Oct 16, 2019Observed: 4.83 ft at 4:00PM Oct 16, 2019Observed: 4.84 ft at 4:15PM Oct 16, 2019Observed: 4.87 ft at 4:30PM Oct 16, 2019Observed: 4.89 ft at 4:45PM Oct 16, 2019Observed: 4.89 ft at 5:00PM Oct 16, 2019Observed: 4.86 ft at 5:15PM Oct 16, 2019Observed: 4.86 ft at 5:30PM Oct 16, 2019Observed: 4.91 ft at 5:45PM Oct 16, 2019Observed: 4.86 ft at 6:00PM Oct 16, 2019Observed: 4.85 ft at 6:15PM Oct 16, 2019Observed: 4.87 ft at 6:30PM Oct 16, 2019Observed: 4.9 ft at 6:45PM Oct 16, 2019Observed: 4.86 ft at 7:00PM Oct 16, 2019Observed: 4.89 ft at 7:15PM Oct 16, 2019Observed: 4.85 ft at 7:30PM Oct 16, 2019Observed: 4.83 ft at 7:45PM Oct 16, 2019Observed: 4.86 ft at 8:00PM Oct 16, 2019Observed: 4.84 ft at 8:15PM Oct 16, 2019Observed: 4.86 ft at 8:30PM Oct 16, 2019Observed: 4.84 ft at 8:45PM Oct 16, 2019Observed: 4.84 ft at 9:00PM Oct 16, 2019Observed: 4.89 ft at 9:15PM Oct 16, 2019Observed: 4.84 ft at 9:30PM Oct 16, 2019Observed: 4.84 ft at 9:45PM Oct 16, 2019Observed: 4.85 ft at 10:00PM Oct 16, 2019Observed: 4.84 ft at 10:15PM Oct 16, 2019Observed: 4.85 ft at 10:30PM Oct 16, 2019Observed: 4.82 ft at 10:45PM Oct 16, 2019Observed: 4.85 ft at 11:00PM Oct 16, 2019Observed: 4.83 ft at 11:15PM Oct 16, 2019Observed: 4.84 ft at 11:30PM Oct 16, 2019Observed: 4.81 ft at 11:45PM Oct 16, 2019Observed: 4.83 ft at 12:00AM Oct 17, 2019Observed: 4.87 ft at 12:15AM Oct 17, 2019Observed: 4.84 ft at 12:30AM Oct 17, 2019Observed: 4.8 ft at 12:45AM Oct 17, 2019Observed: 4.83 ft at 1:00AM Oct 17, 2019Observed: 4.79 ft at 1:15AM Oct 17, 2019Observed: 4.83 ft at 1:30AM Oct 17, 2019Observed: 4.8 ft at 1:45AM Oct 17, 2019Observed: 4.82 ft at 2:00AM Oct 17, 2019Observed: 4.8 ft at 2:15AM Oct 17, 2019Observed: 4.81 ft at 2:30AM Oct 17, 2019Observed: 4.84 ft at 2:45AM Oct 17, 2019Observed: 4.81 ft at 3:00AM Oct 17, 2019Observed: 4.85 ft at 3:15AM Oct 17, 2019Observed: 4.82 ft at 3:30AM Oct 17, 2019Observed: 4.85 ft at 3:45AM Oct 17, 2019Observed: 4.82 ft at 4:00AM Oct 17, 2019Observed: 4.86 ft at 4:15AM Oct 17, 2019Observed: 4.81 ft at 4:30AM Oct 17, 2019Observed: 4.8 ft at 4:45AM Oct 17, 2019Observed: 4.82 ft at 5:00AM Oct 17, 2019Observed: 4.85 ft at 5:15AM Oct 17, 2019Observed: 4.81 ft at 5:30AM Oct 17, 2019Observed: 4.82 ft at 5:45AM Oct 17, 2019Observed: 4.8 ft at 6:00AM Oct 17, 2019Observed: 4.83 ft at 6:15AM Oct 17, 2019Observed: 4.82 ft at 6:30AM Oct 17, 2019Observed: 4.84 ft at 6:45AM Oct 17, 2019Observed: 4.79 ft at 7:00AM Oct 17, 2019Observed: 4.78 ft at 7:15AM Oct 17, 2019Observed: 4.79 ft at 7:30AM Oct 17, 2019Observed: 4.82 ft at 7:45AM Oct 17, 2019Observed: 4.79 ft at 8:00AM Oct 17, 2019Observed: 4.78 ft at 8:15AM Oct 17, 2019Observed: 4.81 ft at 8:30AM Oct 17, 2019Observed: 4.79 ft at 8:45AM Oct 17, 2019Observed: 4.76 ft at 9:00AM Oct 17, 2019Observed: 4.81 ft at 9:15AM Oct 17, 2019Observed: 4.8 ft at 9:30AM Oct 17, 2019Observed: 4.79 ft at 9:45AM Oct 17, 2019Observed: 4.78 ft at 10:00AM Oct 17, 2019Observed: 4.77 ft at 10:15AM Oct 17, 2019Observed: 4.79 ft at 10:30AM Oct 17, 2019Observed: 4.79 ft at 10:45AM Oct 17, 2019Observed: 4.8 ft at 11:00AM Oct 17, 2019Observed: 4.76 ft at 11:15AM Oct 17, 2019Observed: 4.79 ft at 11:30AM Oct 17, 2019Observed: 4.79 ft at 11:45AM Oct 17, 2019Observed: 4.82 ft at 12:00PM Oct 17, 2019Observed: 4.82 ft at 12:15PM Oct 17, 2019Observed: 4.82 ft at 12:30PM Oct 17, 2019Observed: 4.78 ft at 12:45PM Oct 17, 2019Observed: 4.82 ft at 1:00PM Oct 17, 2019Observed: 4.76 ft at 1:15PM Oct 17, 2019Observed: 4.8 ft at 1:30PM Oct 17, 2019Observed: 4.79 ft at 1:45PM Oct 17, 2019Observed: 4.76 ft at 2:00PM Oct 17, 2019Observed: 4.83 ft at 2:15PM Oct 17, 2019Observed: 4.75 ft at 2:30PM Oct 17, 2019Observed: 4.8 ft at 2:45PM Oct 17, 2019Observed: 4.81 ft at 3:00PM Oct 17, 2019Observed: 4.79 ft at 3:15PM Oct 17, 2019Observed: 4.8 ft at 3:30PM Oct 17, 2019Observed: 4.78 ft at 3:45PM Oct 17, 2019Observed: 4.7 ft at 4:00PM Oct 17, 2019Observed: 4.72 ft at 4:15PM Oct 17, 2019Observed: 4.79 ft at 4:30PM Oct 17, 2019Observed: 4.75 ft at 4:45PM Oct 17, 2019Observed: 4.75 ft at 5:00PM Oct 17, 2019Observed: 4.75 ft at 5:15PM Oct 17, 2019Observed: 4.75 ft at 5:30PM Oct 17, 2019Observed: 4.8 ft at 5:45PM Oct 17, 2019Observed: 4.78 ft at 6:00PM Oct 17, 2019Observed: 4.81 ft at 6:15PM Oct 17, 2019Observed: 4.77 ft at 6:30PM Oct 17, 2019Observed: 4.8 ft at 6:45PM Oct 17, 2019Observed: 4.76 ft at 7:00PM Oct 17, 2019Observed: 4.76 ft at 7:15PM Oct 17, 2019Observed: 4.77 ft at 7:30PM Oct 17, 2019Observed: 4.81 ft at 7:45PM Oct 17, 2019Observed: 4.75 ft at 8:00PM Oct 17, 2019Observed: 4.74 ft at 8:15PM Oct 17, 2019Observed: 4.76 ft at 8:30PM Oct 17, 2019USGS--Water Resources of the United StatesMCWI4(plotting HGIRG) Graph Created (8:47PM Oct 17, 2019)ObservedLatest observed value: 4.76 ft at 8:30 PM CDT 17-Oct-2019. Flood Stage is 10 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Winnebago River (Northern IA) at Mason City are issued as needed during times of high water, but are not routinely available.

Return to Area Map
Upstream Gauge - near Mason City US 65 Upstream Gauge Downstream Gauge Downstream Gauge - near Rockford
Flood Categories (in feet)
Major Flood Stage: 15.5
Moderate Flood Stage: 14.5
Flood Stage: 10
Action Stage: 6
Low Stage (in feet): -9999

Historic Crests
(1) 18.74 ft on 06/08/2008
(2) 14.80 ft on 03/27/1961
(3) 14.67 ft on 05/22/2004
(4) 14.27 ft on 04/11/1965
(5) 14.07 ft on 09/22/2016
(6) 13.70 ft on 04/06/1965
(7) 13.06 ft on 08/31/1962
(8) 12.59 ft on 04/01/1993
(9) 12.44 ft on 04/07/1951
(10) 12.30 ft on 05/23/2004
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.14 ft on 02/21/2017
(2) 14.07 ft on 09/22/2016
(3) 8.82 ft on 09/16/2016
(4) 7.82 ft on 09/10/2016
(5) 9.65 ft on 09/07/2016
(6) 9.29 ft on 08/24/2016
(7) 8.64 ft on 07/17/2016
(8) 7.25 ft on 06/15/2016
(9) 7.85 ft on 06/11/2016
(10) 6.66 ft on 02/23/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.68 ft on 10/01/1988

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
20.5 Water overtops the floodwall at the water treatment plant...located at 13th St NE.
17.4 Water reaches bottom of railroad bridge east of Kentucky Avenue bridge.
15 This is the approximate top of levee protection. Levees run from the 12th Street Northeast bridge to 9th Street along the east bank and also from 8th Street to 6th and Hampshire Streets.
14 Water may flow over the city dikes.
12 Widespread flooding occurs along the river. Some backwater effects are possible along Willow Creek between downtown Mason City and the confluence with the Winnebago river.
11 Sandbagging occurs on the dike from 12th Street Northeast to Carolina Street.
10 There is widespread flooding of city parks and water reaches the underside of the 12th Street Northeast bridge at the piers.
8 East and west city parks are affected in the 12th Street Northeast area.
7 Low lying areas along the river are affected.
About This Location Collapse

Latitude: 43.164962° N, Longitude: 93.192703° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 1069.59 ft 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:
Additional Information Collapse
  • USGS 7-Day Streamflow Duration Hydrograph for this location:
    Duration Hydrograph

    Duration Hydrograph Legend


  • USGS Cumulative Streamflow Hydrograph for this location:
    Duration Hydrograph of Cumulative Streamflow
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
Des Moines Weather Forecast Office
9607 NW Beaver Dr.
Des Moines, IA 50131
(515) 270-2614
Ask Questions/Webmaster
Page last modified: 1-Mar-2019 12:34 AM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities