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
Bookmark and Share Navigation Bar End Cap

  
 

Web Portal Changes:

  • Attention: Technicians are currently working to bring Precipitation datasets back to full capability after the April 16 outage.
  • NWPS - water.noaa.gov - Officially operational on Wednesday, March 27th, 8-9am EDT
  • AHPS - water.weather.gov- Scheduled operations ends on Tuesday, May 28th, 2024 - the pages will automatically redirect to water.noaa.gov until May 28, 2025.
  • Other Important URL changes - Service Change Notice 24-29 

Please visit https://www.weather.gov/owp/operations for more information.



Hydrograph River at a Glance Download
Rock River at Byron Stage (ft)Flow (kcfs)Highest Observation: 10.48 ft at 2:15AM Apr 13, 2024Highest Observation: 10.48 ft at 2:30AM Apr 13, 2024Highest Observation: 10.48 ft at 2:45AM Apr 13, 2024Highest Observation: 10.48 ft at 3:00AM Apr 13, 2024Highest Observation: 10.48 ft at 3:15AM Apr 13, 2024Highest Observation: 10.48 ft at 3:30AM Apr 13, 2024Highest Observation: 10.48 ft at 3:45AM Apr 13, 2024Highest Observation: 10.48 ft at 4:00AM Apr 13, 2024Highest Observation: 10.48 ft at 4:15AM Apr 13, 2024Highest Observation: 10.48 ft at 4:30AM Apr 13, 2024Observed: 10.47 ft at 4:45AM Apr 13, 2024Observed: 10.47 ft at 5:00AM Apr 13, 2024Observed: 10.47 ft at 5:15AM Apr 13, 2024Observed: 10.46 ft at 5:30AM Apr 13, 2024Observed: 10.47 ft at 5:45AM Apr 13, 2024Observed: 10.46 ft at 6:00AM Apr 13, 2024Observed: 10.45 ft at 6:15AM Apr 13, 2024Observed: 10.47 ft at 6:30AM Apr 13, 2024Observed: 10.45 ft at 6:45AM Apr 13, 2024Observed: 10.45 ft at 7:00AM Apr 13, 2024Observed: 10.44 ft at 7:15AM Apr 13, 2024Observed: 10.45 ft at 7:30AM Apr 13, 2024Observed: 10.44 ft at 7:45AM Apr 13, 2024Observed: 10.45 ft at 8:00AM Apr 13, 2024Observed: 10.44 ft at 8:15AM Apr 13, 2024Observed: 10.45 ft at 8:30AM Apr 13, 2024Observed: 10.43 ft at 8:45AM Apr 13, 2024Observed: 10.44 ft at 9:00AM Apr 13, 2024Observed: 10.43 ft at 9:15AM Apr 13, 2024Observed: 10.44 ft at 9:30AM Apr 13, 2024Observed: 10.43 ft at 9:45AM Apr 13, 2024Observed: 10.42 ft at 10:00AM Apr 13, 2024Observed: 10.43 ft at 10:15AM Apr 13, 2024Observed: 10.43 ft at 10:30AM Apr 13, 2024Observed: 10.42 ft at 10:45AM Apr 13, 2024Observed: 10.43 ft at 11:00AM Apr 13, 2024Observed: 10.42 ft at 11:15AM Apr 13, 2024Observed: 10.41 ft at 11:30AM Apr 13, 2024Observed: 10.41 ft at 11:45AM Apr 13, 2024Observed: 10.42 ft at 12:00PM Apr 13, 2024Observed: 10.41 ft at 12:15PM Apr 13, 2024Observed: 10.41 ft at 12:30PM Apr 13, 2024Observed: 10.4 ft at 12:45PM Apr 13, 2024Observed: 10.41 ft at 1:00PM Apr 13, 2024Observed: 10.41 ft at 1:15PM Apr 13, 2024Observed: 10.4 ft at 1:30PM Apr 13, 2024Observed: 10.39 ft at 1:45PM Apr 13, 2024Observed: 10.4 ft at 2:00PM Apr 13, 2024Observed: 10.4 ft at 2:15PM Apr 13, 2024Observed: 10.4 ft at 2:30PM Apr 13, 2024Observed: 10.4 ft at 2:45PM Apr 13, 2024Observed: 10.39 ft at 3:00PM Apr 13, 2024Observed: 10.39 ft at 3:15PM Apr 13, 2024Observed: 10.39 ft at 3:30PM Apr 13, 2024Observed: 10.39 ft at 3:45PM Apr 13, 2024Observed: 10.39 ft at 4:00PM Apr 13, 2024Observed: 10.39 ft at 4:15PM Apr 13, 2024Observed: 10.38 ft at 4:30PM Apr 13, 2024Observed: 10.37 ft at 4:45PM Apr 13, 2024Observed: 10.36 ft at 5:00PM Apr 13, 2024Observed: 10.37 ft at 5:15PM Apr 13, 2024Observed: 10.36 ft at 5:30PM Apr 13, 2024Observed: 10.37 ft at 5:45PM Apr 13, 2024Observed: 10.38 ft at 6:00PM Apr 13, 2024Observed: 10.37 ft at 6:15PM Apr 13, 2024Observed: 10.36 ft at 6:30PM Apr 13, 2024Observed: 10.36 ft at 6:45PM Apr 13, 2024Observed: 10.35 ft at 7:00PM Apr 13, 2024Observed: 10.36 ft at 7:15PM Apr 13, 2024Observed: 10.35 ft at 7:30PM Apr 13, 2024Observed: 10.35 ft at 7:45PM Apr 13, 2024Observed: 10.34 ft at 8:00PM Apr 13, 2024Observed: 10.34 ft at 8:15PM Apr 13, 2024Observed: 10.34 ft at 8:30PM Apr 13, 2024Observed: 10.34 ft at 8:45PM Apr 13, 2024Observed: 10.34 ft at 9:00PM Apr 13, 2024Observed: 10.33 ft at 9:15PM Apr 13, 2024Observed: 10.33 ft at 9:30PM Apr 13, 2024Observed: 10.32 ft at 9:45PM Apr 13, 2024Observed: 10.32 ft at 10:00PM Apr 13, 2024Observed: 10.32 ft at 10:15PM Apr 13, 2024Observed: 10.33 ft at 10:30PM Apr 13, 2024Observed: 10.33 ft at 10:45PM Apr 13, 2024Observed: 10.32 ft at 11:00PM Apr 13, 2024Observed: 10.31 ft at 11:15PM Apr 13, 2024Observed: 10.31 ft at 11:30PM Apr 13, 2024Observed: 10.31 ft at 11:45PM Apr 13, 2024Observed: 10.31 ft at 12:00AM Apr 14, 2024Observed: 10.33 ft at 12:15AM Apr 14, 2024Observed: 10.3 ft at 12:30AM Apr 14, 2024Observed: 10.31 ft at 12:45AM Apr 14, 2024Observed: 10.31 ft at 1:00AM Apr 14, 2024Observed: 10.29 ft at 1:15AM Apr 14, 2024Observed: 10.3 ft at 1:30AM Apr 14, 2024Observed: 10.29 ft at 1:45AM Apr 14, 2024Observed: 10.3 ft at 2:00AM Apr 14, 2024Observed: 10.3 ft at 2:15AM Apr 14, 2024Observed: 10.29 ft at 2:30AM Apr 14, 2024Observed: 10.3 ft at 2:45AM Apr 14, 2024Observed: 10.29 ft at 3:00AM Apr 14, 2024Observed: 10.29 ft at 3:15AM Apr 14, 2024Observed: 10.28 ft at 3:30AM Apr 14, 2024Observed: 10.28 ft at 3:45AM Apr 14, 2024Observed: 10.29 ft at 4:00AM Apr 14, 2024Observed: 10.28 ft at 4:15AM Apr 14, 2024Observed: 10.28 ft at 4:30AM Apr 14, 2024Observed: 10.28 ft at 4:45AM Apr 14, 2024Observed: 10.26 ft at 5:00AM Apr 14, 2024Observed: 10.27 ft at 5:15AM Apr 14, 2024Observed: 10.25 ft at 5:30AM Apr 14, 2024Observed: 10.26 ft at 5:45AM Apr 14, 2024Observed: 10.25 ft at 6:00AM Apr 14, 2024Observed: 10.25 ft at 6:15AM Apr 14, 2024Observed: 10.24 ft at 6:30AM Apr 14, 2024Observed: 10.25 ft at 6:45AM Apr 14, 2024Observed: 10.24 ft at 7:00AM Apr 14, 2024Observed: 10.24 ft at 7:15AM Apr 14, 2024Observed: 10.24 ft at 7:30AM Apr 14, 2024Observed: 10.24 ft at 7:45AM Apr 14, 2024Observed: 10.24 ft at 8:00AM Apr 14, 2024Observed: 10.24 ft at 8:15AM Apr 14, 2024Observed: 10.24 ft at 8:30AM Apr 14, 2024Observed: 10.24 ft at 8:45AM Apr 14, 2024Observed: 10.23 ft at 9:00AM Apr 14, 2024Observed: 10.22 ft at 9:15AM Apr 14, 2024Observed: 10.21 ft at 9:30AM Apr 14, 2024Observed: 10.22 ft at 9:45AM Apr 14, 2024Observed: 10.22 ft at 10:00AM Apr 14, 2024Observed: 10.22 ft at 10:15AM Apr 14, 2024Observed: 10.21 ft at 10:30AM Apr 14, 2024Observed: 10.21 ft at 10:45AM Apr 14, 2024Observed: 10.2 ft at 11:00AM Apr 14, 2024Observed: 10.21 ft at 11:15AM Apr 14, 2024Observed: 10.2 ft at 11:30AM Apr 14, 2024Observed: 10.2 ft at 11:45AM Apr 14, 2024Observed: 10.19 ft at 12:00PM Apr 14, 2024Observed: 10.2 ft at 12:15PM Apr 14, 2024Observed: 10.2 ft at 12:30PM Apr 14, 2024Observed: 10.19 ft at 12:45PM Apr 14, 2024Observed: 10.19 ft at 1:00PM Apr 14, 2024Observed: 10.19 ft at 1:15PM Apr 14, 2024Observed: 10.19 ft at 1:30PM Apr 14, 2024Observed: 10.18 ft at 1:45PM Apr 14, 2024Observed: 10.19 ft at 2:00PM Apr 14, 2024Observed: 10.19 ft at 2:15PM Apr 14, 2024Observed: 10.18 ft at 2:30PM Apr 14, 2024Observed: 10.19 ft at 2:45PM Apr 14, 2024Observed: 10.18 ft at 3:00PM Apr 14, 2024Observed: 10.18 ft at 3:15PM Apr 14, 2024Observed: 10.19 ft at 3:30PM Apr 14, 2024Observed: 10.18 ft at 3:45PM Apr 14, 2024Observed: 10.18 ft at 4:00PM Apr 14, 2024Observed: 10.18 ft at 4:15PM Apr 14, 2024Observed: 10.17 ft at 4:30PM Apr 14, 2024Observed: 10.17 ft at 4:45PM Apr 14, 2024Observed: 10.17 ft at 5:00PM Apr 14, 2024Observed: 10.17 ft at 5:15PM Apr 14, 2024Observed: 10.16 ft at 5:30PM Apr 14, 2024Observed: 10.16 ft at 5:45PM Apr 14, 2024Observed: 10.17 ft at 6:00PM Apr 14, 2024Observed: 10.17 ft at 6:15PM Apr 14, 2024Observed: 10.16 ft at 6:30PM Apr 14, 2024Observed: 10.16 ft at 6:45PM Apr 14, 2024Observed: 10.16 ft at 7:00PM Apr 14, 2024Observed: 10.15 ft at 7:15PM Apr 14, 2024Observed: 10.15 ft at 7:30PM Apr 14, 2024Observed: 10.15 ft at 7:45PM Apr 14, 2024Observed: 10.15 ft at 8:00PM Apr 14, 2024Observed: 10.16 ft at 8:15PM Apr 14, 2024Observed: 10.15 ft at 8:30PM Apr 14, 2024Observed: 10.14 ft at 8:45PM Apr 14, 2024Observed: 10.15 ft at 9:00PM Apr 14, 2024Observed: 10.15 ft at 9:15PM Apr 14, 2024Observed: 10.14 ft at 9:30PM Apr 14, 2024Observed: 10.14 ft at 9:45PM Apr 14, 2024Observed: 10.14 ft at 10:00PM Apr 14, 2024Observed: 10.14 ft at 10:15PM Apr 14, 2024Observed: 10.13 ft at 10:30PM Apr 14, 2024Observed: 10.13 ft at 10:45PM Apr 14, 2024Observed: 10.13 ft at 11:00PM Apr 14, 2024Observed: 10.13 ft at 11:15PM Apr 14, 2024Observed: 10.13 ft at 11:30PM Apr 14, 2024Observed: 10.12 ft at 11:45PM Apr 14, 2024Observed: 10.12 ft at 12:00AM Apr 15, 2024Observed: 10.11 ft at 12:15AM Apr 15, 2024Observed: 10.12 ft at 12:30AM Apr 15, 2024Observed: 10.12 ft at 12:45AM Apr 15, 2024Observed: 10.11 ft at 1:00AM Apr 15, 2024Observed: 10.11 ft at 1:15AM Apr 15, 2024Observed: 10.11 ft at 1:30AM Apr 15, 2024Observed: 10.1 ft at 1:45AM Apr 15, 2024Observed: 10.1 ft at 2:00AM Apr 15, 2024Observed: 10.09 ft at 2:15AM Apr 15, 2024Observed: 10.08 ft at 2:30AM Apr 15, 2024Observed: 10.08 ft at 2:45AM Apr 15, 2024Observed: 10.08 ft at 3:00AM Apr 15, 2024Observed: 10.09 ft at 3:15AM Apr 15, 2024Observed: 10.08 ft at 3:30AM Apr 15, 2024Observed: 10.07 ft at 3:45AM Apr 15, 2024Observed: 10.07 ft at 4:00AM Apr 15, 2024Observed: 10.07 ft at 4:15AM Apr 15, 2024Observed: 10.07 ft at 4:30AM Apr 15, 2024Observed: 10.06 ft at 4:45AM Apr 15, 2024Observed: 10.06 ft at 5:00AM Apr 15, 2024Observed: 10.05 ft at 5:15AM Apr 15, 2024Observed: 10.05 ft at 5:30AM Apr 15, 2024Observed: 10.05 ft at 5:45AM Apr 15, 2024Observed: 10.05 ft at 6:00AM Apr 15, 2024Observed: 10.05 ft at 6:15AM Apr 15, 2024Observed: 10.05 ft at 6:30AM Apr 15, 2024Observed: 10.04 ft at 6:45AM Apr 15, 2024Observed: 10.05 ft at 7:00AM Apr 15, 2024Observed: 10.04 ft at 7:15AM Apr 15, 2024Observed: 10.04 ft at 7:30AM Apr 15, 2024Observed: 10.03 ft at 7:45AM Apr 15, 2024Observed: 10.03 ft at 8:00AM Apr 15, 2024Observed: 10.03 ft at 8:15AM Apr 15, 2024Observed: 10.03 ft at 8:30AM Apr 15, 2024Observed: 10.02 ft at 8:45AM Apr 15, 2024Observed: 10.02 ft at 9:00AM Apr 15, 2024Observed: 10.01 ft at 9:15AM Apr 15, 2024Observed: 10.02 ft at 9:30AM Apr 15, 2024Observed: 10.01 ft at 9:45AM Apr 15, 2024Observed: 10.01 ft at 10:00AM Apr 15, 2024Observed: 10.01 ft at 10:15AM Apr 15, 2024Observed: 10 ft at 10:30AM Apr 15, 2024Observed: 10.01 ft at 10:45AM Apr 15, 2024Observed: 10.01 ft at 11:00AM Apr 15, 2024Observed: 10 ft at 11:15AM Apr 15, 2024Observed: 10 ft at 11:30AM Apr 15, 2024Observed: 10 ft at 11:45AM Apr 15, 2024Observed: 10 ft at 12:00PM Apr 15, 2024Observed: 10 ft at 12:15PM Apr 15, 2024Observed: 10 ft at 12:30PM Apr 15, 2024Observed: 9.99 ft at 12:45PM Apr 15, 2024Observed: 9.99 ft at 1:00PM Apr 15, 2024Observed: 9.99 ft at 1:15PM Apr 15, 2024Observed: 9.99 ft at 1:30PM Apr 15, 2024Observed: 9.99 ft at 1:45PM Apr 15, 2024Observed: 10 ft at 2:00PM Apr 15, 2024Observed: 9.99 ft at 2:15PM Apr 15, 2024Observed: 9.98 ft at 2:30PM Apr 15, 2024Observed: 9.99 ft at 2:45PM Apr 15, 2024Observed: 9.99 ft at 3:00PM Apr 15, 2024Observed: 9.98 ft at 3:15PM Apr 15, 2024Observed: 9.98 ft at 3:30PM Apr 15, 2024Observed: 9.98 ft at 3:45PM Apr 15, 2024Observed: 9.98 ft at 4:00PM Apr 15, 2024Observed: 9.99 ft at 4:15PM Apr 15, 2024Observed: 9.97 ft at 4:30PM Apr 15, 2024Observed: 9.98 ft at 4:45PM Apr 15, 2024Observed: 9.98 ft at 5:00PM Apr 15, 2024Observed: 9.98 ft at 5:15PM Apr 15, 2024Observed: 9.98 ft at 5:30PM Apr 15, 2024Observed: 9.98 ft at 5:45PM Apr 15, 2024Observed: 9.97 ft at 6:00PM Apr 15, 2024Observed: 9.97 ft at 6:15PM Apr 15, 2024Observed: 9.97 ft at 6:30PM Apr 15, 2024Observed: 9.96 ft at 6:45PM Apr 15, 2024Observed: 9.97 ft at 7:00PM Apr 15, 2024Observed: 9.96 ft at 7:15PM Apr 15, 2024Observed: 9.97 ft at 7:30PM Apr 15, 2024Observed: 9.96 ft at 7:45PM Apr 15, 2024Observed: 9.96 ft at 8:00PM Apr 15, 2024Observed: 9.96 ft at 8:15PM Apr 15, 2024Observed: 9.96 ft at 8:30PM Apr 15, 2024Observed: 9.96 ft at 8:45PM Apr 15, 2024Observed: 9.96 ft at 9:00PM Apr 15, 2024Observed: 9.95 ft at 9:15PM Apr 15, 2024Observed: 9.95 ft at 9:30PM Apr 15, 2024Observed: 9.95 ft at 9:45PM Apr 15, 2024Observed: 9.94 ft at 10:00PM Apr 15, 2024Observed: 9.94 ft at 10:15PM Apr 15, 2024Observed: 9.94 ft at 10:30PM Apr 15, 2024Observed: 9.94 ft at 10:45PM Apr 15, 2024Observed: 9.94 ft at 11:00PM Apr 15, 2024Observed: 9.93 ft at 11:15PM Apr 15, 2024Observed: 9.93 ft at 11:30PM Apr 15, 2024Observed: 9.93 ft at 11:45PM Apr 15, 2024Observed: 9.94 ft at 12:00AM Apr 16, 2024Observed: 9.93 ft at 12:15AM Apr 16, 2024Observed: 9.92 ft at 12:30AM Apr 16, 2024Observed: 9.92 ft at 12:45AM Apr 16, 2024Observed: 9.93 ft at 1:00AM Apr 16, 2024Observed: 9.92 ft at 1:15AM Apr 16, 2024Observed: 9.92 ft at 1:30AM Apr 16, 2024Observed: 9.91 ft at 1:45AM Apr 16, 2024Observed: 9.91 ft at 2:00AM Apr 16, 2024Observed: 9.91 ft at 2:15AM Apr 16, 2024Observed: 9.91 ft at 2:30AM Apr 16, 2024Observed: 9.89 ft at 2:45AM Apr 16, 2024Observed: 9.89 ft at 3:00AM Apr 16, 2024Observed: 9.89 ft at 3:15AM Apr 16, 2024Observed: 9.89 ft at 3:30AM Apr 16, 2024Observed: 9.88 ft at 3:45AM Apr 16, 2024Observed: 9.88 ft at 4:00AM Apr 16, 2024Observed: 9.88 ft at 4:15AM Apr 16, 2024Observed: 9.89 ft at 4:30AM Apr 16, 2024Observed: 9.88 ft at 4:45AM Apr 16, 2024Observed: 9.88 ft at 5:00AM Apr 16, 2024Observed: 9.87 ft at 5:15AM Apr 16, 2024Observed: 9.87 ft at 5:30AM Apr 16, 2024Observed: 9.87 ft at 5:45AM Apr 16, 2024Observed: 9.87 ft at 6:00AM Apr 16, 2024Observed: 9.87 ft at 6:15AM Apr 16, 2024Observed: 9.86 ft at 6:30AM Apr 16, 2024Observed: 9.86 ft at 6:45AM Apr 16, 2024Observed: 9.86 ft at 7:00AM Apr 16, 2024Observed: 9.85 ft at 7:15AM Apr 16, 2024Observed: 9.85 ft at 7:30AM Apr 16, 2024Observed: 9.85 ft at 7:45AM Apr 16, 2024Observed: 9.85 ft at 8:00AM Apr 16, 2024Observed: 9.85 ft at 8:15AM Apr 16, 2024Observed: 9.83 ft at 8:30AM Apr 16, 2024Observed: 9.83 ft at 8:45AM Apr 16, 2024Observed: 9.83 ft at 9:00AM Apr 16, 2024Observed: 9.83 ft at 9:15AM Apr 16, 2024Observed: 9.82 ft at 9:30AM Apr 16, 2024Observed: 9.82 ft at 9:45AM Apr 16, 2024Observed: 9.83 ft at 10:00AM Apr 16, 2024Observed: 9.82 ft at 10:15AM Apr 16, 2024Observed: 9.82 ft at 10:30AM Apr 16, 2024Observed: 9.82 ft at 10:45AM Apr 16, 2024Observed: 9.82 ft at 11:00AM Apr 16, 2024Observed: 9.82 ft at 11:15AM Apr 16, 2024Observed: 9.81 ft at 11:30AM Apr 16, 2024Observed: 9.81 ft at 11:45AM Apr 16, 2024Observed: 9.81 ft at 12:00PM Apr 16, 2024Observed: 9.8 ft at 12:15PM Apr 16, 2024Observed: 9.8 ft at 12:30PM Apr 16, 2024Observed: 9.8 ft at 12:45PM Apr 16, 2024Observed: 9.8 ft at 1:00PM Apr 16, 2024Observed: 9.79 ft at 1:15PM Apr 16, 2024Observed: 9.81 ft at 1:30PM Apr 16, 2024Observed: 9.79 ft at 1:45PM Apr 16, 2024Observed: 9.79 ft at 2:00PM Apr 16, 2024Observed: 9.79 ft at 2:15PM Apr 16, 2024Observed: 9.78 ft at 2:30PM Apr 16, 2024Observed: 9.79 ft at 2:45PM Apr 16, 2024Observed: 9.79 ft at 3:00PM Apr 16, 2024Observed: 9.79 ft at 3:15PM Apr 16, 2024Observed: 9.78 ft at 3:30PM Apr 16, 2024Observed: 9.79 ft at 3:45PM Apr 16, 2024Observed: 9.79 ft at 4:00PM Apr 16, 2024Observed: 9.78 ft at 4:15PM Apr 16, 2024Observed: 9.78 ft at 4:30PM Apr 16, 2024Observed: 9.79 ft at 4:45PM Apr 16, 2024Observed: 9.78 ft at 5:00PM Apr 16, 2024Observed: 9.76 ft at 5:15PM Apr 16, 2024Observed: 9.77 ft at 5:30PM Apr 16, 2024Observed: 9.78 ft at 5:45PM Apr 16, 2024Observed: 9.79 ft at 6:00PM Apr 16, 2024Observed: 9.79 ft at 6:15PM Apr 16, 2024Observed: 9.78 ft at 6:30PM Apr 16, 2024Observed: 9.79 ft at 6:45PM Apr 16, 2024Observed: 9.79 ft at 7:00PM Apr 16, 2024Observed: 9.78 ft at 7:15PM Apr 16, 2024Observed: 9.78 ft at 7:30PM Apr 16, 2024Observed: 9.77 ft at 7:45PM Apr 16, 2024Observed: 9.77 ft at 8:00PM Apr 16, 2024Observed: 9.76 ft at 8:15PM Apr 16, 2024Observed: 9.77 ft at 8:30PM Apr 16, 2024Observed: 9.77 ft at 8:45PM Apr 16, 2024Observed: 9.78 ft at 9:00PM Apr 16, 2024Observed: 9.81 ft at 9:15PM Apr 16, 2024Observed: 9.81 ft at 9:30PM Apr 16, 2024Observed: 9.79 ft at 9:45PM Apr 16, 2024Observed: 9.79 ft at 10:00PM Apr 16, 2024Observed: 9.79 ft at 10:15PM Apr 16, 2024Observed: 9.79 ft at 10:30PM Apr 16, 2024Observed: 9.78 ft at 10:45PM Apr 16, 2024Observed: 9.79 ft at 11:00PM Apr 16, 2024Observed: 9.77 ft at 11:15PM Apr 16, 2024Observed: 9.78 ft at 11:30PM Apr 16, 2024Observed: 9.78 ft at 11:45PM Apr 16, 2024Observed: 9.78 ft at 12:00AM Apr 17, 2024Observed: 9.77 ft at 12:15AM Apr 17, 2024Observed: 9.77 ft at 12:30AM Apr 17, 2024Observed: 9.78 ft at 12:45AM Apr 17, 2024Observed: 9.77 ft at 1:00AM Apr 17, 2024Observed: 9.77 ft at 1:15AM Apr 17, 2024Observed: 9.77 ft at 1:30AM Apr 17, 2024Observed: 9.76 ft at 1:45AM Apr 17, 2024Observed: 9.77 ft at 2:00AM Apr 17, 2024Observed: 9.77 ft at 2:15AM Apr 17, 2024Observed: 9.77 ft at 2:30AM Apr 17, 2024Observed: 9.76 ft at 2:45AM Apr 17, 2024Observed: 9.77 ft at 3:00AM Apr 17, 2024Observed: 9.75 ft at 3:15AM Apr 17, 2024Observed: 9.75 ft at 3:30AM Apr 17, 2024Observed: 9.77 ft at 3:45AM Apr 17, 2024Observed: 9.77 ft at 4:00AM Apr 17, 2024Observed: 9.77 ft at 4:15AM Apr 17, 2024Observed: 9.77 ft at 4:30AM Apr 17, 2024Observed: 9.77 ft at 4:45AM Apr 17, 2024Observed: 9.77 ft at 5:00AM Apr 17, 2024Observed: 9.77 ft at 5:15AM Apr 17, 2024Observed: 9.8 ft at 5:30AM Apr 17, 2024Observed: 9.78 ft at 5:45AM Apr 17, 2024Observed: 9.78 ft at 6:00AM Apr 17, 2024Observed: 9.78 ft at 6:15AM Apr 17, 2024Observed: 9.78 ft at 6:30AM Apr 17, 2024Observed: 9.78 ft at 6:45AM Apr 17, 2024Observed: 9.77 ft at 7:00AM Apr 17, 2024Observed: 9.78 ft at 7:15AM Apr 17, 2024Observed: 9.78 ft at 7:30AM Apr 17, 2024Observed: 9.77 ft at 7:45AM Apr 17, 2024Observed: 9.77 ft at 8:00AM Apr 17, 2024Observed: 9.76 ft at 8:15AM Apr 17, 2024Observed: 9.78 ft at 8:30AM Apr 17, 2024Observed: 9.77 ft at 8:45AM Apr 17, 2024Observed: 9.77 ft at 9:00AM Apr 17, 2024Observed: 9.79 ft at 9:15AM Apr 17, 2024Observed: 9.78 ft at 9:30AM Apr 17, 2024Observed: 9.79 ft at 9:45AM Apr 17, 2024Observed: 9.79 ft at 10:00AM Apr 17, 2024Observed: 9.78 ft at 10:15AM Apr 17, 2024Observed: 9.8 ft at 10:30AM Apr 17, 2024Observed: 9.78 ft at 10:45AM Apr 17, 2024Observed: 9.8 ft at 11:00AM Apr 17, 2024Observed: 9.8 ft at 11:15AM Apr 17, 2024Observed: 9.79 ft at 11:30AM Apr 17, 2024Observed: 9.79 ft at 11:45AM Apr 17, 2024Observed: 9.8 ft at 12:00PM Apr 17, 2024Observed: 9.76 ft at 12:15PM Apr 17, 2024Observed: 9.83 ft at 12:30PM Apr 17, 2024Observed: 9.84 ft at 12:45PM Apr 17, 2024Observed: 9.84 ft at 1:00PM Apr 17, 2024Observed: 9.84 ft at 1:15PM Apr 17, 2024Observed: 9.85 ft at 1:30PM Apr 17, 2024Observed: 9.87 ft at 1:45PM Apr 17, 2024Observed: 9.84 ft at 2:00PM Apr 17, 2024Observed: 9.83 ft at 2:15PM Apr 17, 2024Observed: 9.9 ft at 2:30PM Apr 17, 2024Observed: 9.86 ft at 2:45PM Apr 17, 2024Observed: 9.9 ft at 3:00PM Apr 17, 2024Observed: 9.9 ft at 3:15PM Apr 17, 2024Observed: 9.92 ft at 3:30PM Apr 17, 2024Observed: 9.93 ft at 3:45PM Apr 17, 2024Observed: 9.88 ft at 4:00PM Apr 17, 2024Observed: 9.89 ft at 4:15PM Apr 17, 2024Observed: 9.9 ft at 4:30PM Apr 17, 2024Observed: 9.87 ft at 4:45PM Apr 17, 2024Observed: 9.91 ft at 5:00PM Apr 17, 2024Observed: 9.86 ft at 5:15PM Apr 17, 2024Observed: 9.88 ft at 5:30PM Apr 17, 2024Observed: 9.88 ft at 5:45PM Apr 17, 2024Observed: 9.89 ft at 6:00PM Apr 17, 2024Observed: 9.86 ft at 6:15PM Apr 17, 2024Observed: 9.86 ft at 6:30PM Apr 17, 2024Observed: 9.87 ft at 6:45PM Apr 17, 2024Observed: 9.86 ft at 7:00PM Apr 17, 2024Observed: 9.87 ft at 7:15PM Apr 17, 2024Observed: 9.87 ft at 7:30PM Apr 17, 2024Observed: 9.86 ft at 7:45PM Apr 17, 2024Observed: 9.87 ft at 8:00PM Apr 17, 2024Observed: 9.88 ft at 8:15PM Apr 17, 2024Observed: 9.88 ft at 8:30PM Apr 17, 2024Observed: 9.89 ft at 8:45PM Apr 17, 2024Observed: 9.89 ft at 9:00PM Apr 17, 2024Observed: 9.9 ft at 9:15PM Apr 17, 2024Observed: 9.9 ft at 9:30PM Apr 17, 2024Observed: 9.9 ft at 9:45PM Apr 17, 2024Observed: 9.9 ft at 10:00PM Apr 17, 2024Observed: 9.91 ft at 10:15PM Apr 17, 2024Observed: 9.91 ft at 10:30PM Apr 17, 2024Observed: 9.92 ft at 10:45PM Apr 17, 2024Observed: 9.92 ft at 11:00PM Apr 17, 2024Observed: 9.92 ft at 11:15PM Apr 17, 2024Observed: 9.93 ft at 11:30PM Apr 17, 2024Observed: 9.93 ft at 11:45PM Apr 17, 2024Observed: 9.94 ft at 12:00AM Apr 18, 2024Observed: 9.94 ft at 12:15AM Apr 18, 2024Observed: 9.95 ft at 12:30AM Apr 18, 2024Observed: 9.94 ft at 12:45AM Apr 18, 2024Observed: 9.94 ft at 1:00AM Apr 18, 2024Observed: 9.95 ft at 1:15AM Apr 18, 2024Observed: 9.95 ft at 1:30AM Apr 18, 2024Observed: 9.96 ft at 1:45AM Apr 18, 2024Observed: 9.96 ft at 2:00AM Apr 18, 2024Observed: 9.96 ft at 2:15AM Apr 18, 2024Observed: 9.96 ft at 2:30AM Apr 18, 2024Observed: 9.97 ft at 2:45AM Apr 18, 2024Observed: 9.97 ft at 3:00AM Apr 18, 2024Observed: 9.97 ft at 3:15AM Apr 18, 2024Observed: 9.97 ft at 3:30AM Apr 18, 2024Observed: 9.97 ft at 3:45AM Apr 18, 2024Observed: 9.96 ft at 4:00AM Apr 18, 2024Observed: 9.97 ft at 4:15AM Apr 18, 2024Observed: 9.97 ft at 4:30AM Apr 18, 2024Observed: 9.97 ft at 4:45AM Apr 18, 2024Observed: 9.96 ft at 5:00AM Apr 18, 2024Observed: 9.96 ft at 5:15AM Apr 18, 2024Observed: 9.97 ft at 5:30AM Apr 18, 2024Observed: 9.97 ft at 5:45AM Apr 18, 2024Observed: 9.96 ft at 6:00AM Apr 18, 2024Observed: 9.97 ft at 6:15AM Apr 18, 2024Observed: 9.96 ft at 6:30AM Apr 18, 2024Observed: 9.96 ft at 6:45AM Apr 18, 2024Observed: 9.96 ft at 7:00AM Apr 18, 2024Observed: 9.96 ft at 7:15AM Apr 18, 2024Observed: 9.94 ft at 7:30AM Apr 18, 2024Observed: 9.95 ft at 7:45AM Apr 18, 2024Observed: 9.95 ft at 8:00AM Apr 18, 2024Observed: 9.94 ft at 8:15AM Apr 18, 2024Observed: 9.94 ft at 8:30AM Apr 18, 2024Observed: 9.93 ft at 8:45AM Apr 18, 2024Observed: 9.93 ft at 9:00AM Apr 18, 2024Observed: 9.93 ft at 9:15AM Apr 18, 2024Observed: 9.93 ft at 9:30AM Apr 18, 2024Observed: 9.94 ft at 9:45AM Apr 18, 2024Observed: 9.93 ft at 10:00AM Apr 18, 2024Observed: 9.92 ft at 10:15AM Apr 18, 2024Observed: 9.92 ft at 10:30AM Apr 18, 2024Observed: 9.91 ft at 10:45AM Apr 18, 2024Observed: 9.92 ft at 11:00AM Apr 18, 2024Observed: 9.9 ft at 11:15AM Apr 18, 2024Observed: 9.9 ft at 11:30AM Apr 18, 2024Observed: 9.9 ft at 11:45AM Apr 18, 2024Observed: 9.89 ft at 12:00PM Apr 18, 2024Observed: 9.89 ft at 12:15PM Apr 18, 2024Observed: 9.88 ft at 12:30PM Apr 18, 2024Observed: 9.89 ft at 12:45PM Apr 18, 2024Observed: 9.89 ft at 1:00PM Apr 18, 2024Observed: 9.88 ft at 1:15PM Apr 18, 2024Observed: 9.88 ft at 1:30PM Apr 18, 2024Observed: 9.87 ft at 1:45PM Apr 18, 2024Observed: 9.87 ft at 2:00PM Apr 18, 2024Observed: 9.86 ft at 2:15PM Apr 18, 2024Observed: 9.87 ft at 2:30PM Apr 18, 2024Observed: 9.85 ft at 2:45PM Apr 18, 2024Observed: 9.85 ft at 3:00PM Apr 18, 2024Observed: 9.85 ft at 3:15PM Apr 18, 2024Observed: 9.83 ft at 3:30PM Apr 18, 2024Observed: 9.84 ft at 3:45PM Apr 18, 2024Observed: 9.83 ft at 4:00PM Apr 18, 2024Observed: 9.82 ft at 4:15PM Apr 18, 2024Observed: 9.81 ft at 4:30PM Apr 18, 2024Observed: 9.82 ft at 4:45PM Apr 18, 2024Observed: 9.82 ft at 5:00PM Apr 18, 2024Observed: 9.82 ft at 5:15PM Apr 18, 2024Observed: 9.81 ft at 5:30PM Apr 18, 2024Observed: 9.81 ft at 5:45PM Apr 18, 2024Observed: 9.81 ft at 6:00PM Apr 18, 2024Observed: 9.8 ft at 6:15PM Apr 18, 2024Observed: 9.8 ft at 6:30PM Apr 18, 2024Observed: 9.8 ft at 6:45PM Apr 18, 2024Observed: 9.79 ft at 7:00PM Apr 18, 2024Observed: 9.79 ft at 7:15PM Apr 18, 2024Observed: 9.78 ft at 7:30PM Apr 18, 2024Observed: 9.78 ft at 7:45PM Apr 18, 2024Observed: 9.78 ft at 8:00PM Apr 18, 2024Observed: 9.77 ft at 8:15PM Apr 18, 2024Observed: 9.78 ft at 8:30PM Apr 18, 2024Observed: 9.78 ft at 8:45PM Apr 18, 2024Observed: 9.77 ft at 9:00PM Apr 18, 2024Observed: 9.77 ft at 9:15PM Apr 18, 2024Observed: 9.77 ft at 9:30PM Apr 18, 2024Observed: 9.77 ft at 9:45PM Apr 18, 2024Observed: 9.77 ft at 10:00PM Apr 18, 2024Observed: 9.76 ft at 10:15PM Apr 18, 2024Observed: 9.77 ft at 10:30PM Apr 18, 2024Observed: 9.76 ft at 10:45PM Apr 18, 2024Observed: 9.76 ft at 11:00PM Apr 18, 2024Observed: 9.77 ft at 11:15PM Apr 18, 2024Observed: 9.76 ft at 11:30PM Apr 18, 2024Observed: 9.76 ft at 11:45PM Apr 18, 2024Observed: 9.77 ft at 12:00AM Apr 19, 2024Observed: 9.76 ft at 12:15AM Apr 19, 2024Observed: 9.76 ft at 12:30AM Apr 19, 2024Observed: 9.77 ft at 12:45AM Apr 19, 2024Observed: 9.76 ft at 1:00AM Apr 19, 2024Observed: 9.76 ft at 1:15AM Apr 19, 2024Observed: 9.76 ft at 1:30AM Apr 19, 2024Observed: 9.76 ft at 1:45AM Apr 19, 2024Observed: 9.75 ft at 2:00AM Apr 19, 2024Observed: 9.77 ft at 2:15AM Apr 19, 2024Observed: 9.76 ft at 2:30AM Apr 19, 2024Observed: 9.76 ft at 2:45AM Apr 19, 2024Observed: 9.76 ft at 3:00AM Apr 19, 2024Observed: 9.76 ft at 3:15AM Apr 19, 2024Observed: 9.75 ft at 3:30AM Apr 19, 2024Observed: 9.76 ft at 3:45AM Apr 19, 2024Observed: 9.76 ft at 4:00AM Apr 19, 2024Observed: 9.75 ft at 4:15AM Apr 19, 2024Observed: 9.75 ft at 4:30AM Apr 19, 2024Observed: 9.76 ft at 4:45AM Apr 19, 2024Observed: 9.76 ft at 5:00AM Apr 19, 2024Observed: 9.76 ft at 5:15AM Apr 19, 2024Observed: 9.75 ft at 5:30AM Apr 19, 2024Observed: 9.75 ft at 5:45AM Apr 19, 2024Observed: 9.75 ft at 6:00AM Apr 19, 2024Observed: 9.75 ft at 6:15AM Apr 19, 2024Observed: 9.75 ft at 6:30AM Apr 19, 2024Observed: 9.75 ft at 6:45AM Apr 19, 2024Observed: 9.75 ft at 7:00AM Apr 19, 2024Observed: 9.75 ft at 7:15AM Apr 19, 2024Observed: 9.76 ft at 7:30AM Apr 19, 2024Observed: 9.75 ft at 7:45AM Apr 19, 2024Observed: 9.76 ft at 8:00AM Apr 19, 2024Observed: 9.75 ft at 8:15AM Apr 19, 2024Observed: 9.76 ft at 8:30AM Apr 19, 2024Observed: 9.76 ft at 8:45AM Apr 19, 2024Observed: 9.76 ft at 9:00AM Apr 19, 2024Observed: 9.75 ft at 9:15AM Apr 19, 2024Observed: 9.75 ft at 9:30AM Apr 19, 2024Observed: 9.74 ft at 9:45AM Apr 19, 2024Observed: 9.75 ft at 10:00AM Apr 19, 2024Observed: 9.73 ft at 10:15AM Apr 19, 2024Observed: 9.75 ft at 10:30AM Apr 19, 2024Observed: 9.74 ft at 10:45AM Apr 19, 2024Observed: 9.73 ft at 11:00AM Apr 19, 2024Observed: 9.71 ft at 11:15AM Apr 19, 2024Observed: 9.73 ft at 11:30AM Apr 19, 2024Observed: 9.7 ft at 11:45AM Apr 19, 2024Observed: 9.74 ft at 12:00PM Apr 19, 2024Observed: 9.72 ft at 12:15PM Apr 19, 2024Observed: 9.74 ft at 12:30PM Apr 19, 2024Observed: 9.71 ft at 12:45PM Apr 19, 2024Observed: 9.7 ft at 1:00PM Apr 19, 2024Observed: 9.69 ft at 1:15PM Apr 19, 2024Observed: 9.72 ft at 1:30PM Apr 19, 2024Observed: 9.7 ft at 1:45PM Apr 19, 2024Observed: 9.69 ft at 2:00PM Apr 19, 2024Observed: 9.71 ft at 2:15PM Apr 19, 2024Observed: 9.7 ft at 2:30PM Apr 19, 2024Observed: 9.71 ft at 2:45PM Apr 19, 2024Observed: 9.66 ft at 3:00PM Apr 19, 2024Observed: 9.72 ft at 3:15PM Apr 19, 2024Observed: 9.7 ft at 3:30PM Apr 19, 2024Observed: 9.7 ft at 3:45PM Apr 19, 2024Observed: 9.72 ft at 4:00PM Apr 19, 2024Observed: 9.69 ft at 4:15PM Apr 19, 2024Observed: 9.66 ft at 4:30PM Apr 19, 2024Observed: 9.59 ft at 4:45PM Apr 19, 2024Observed: 9.7 ft at 5:00PM Apr 19, 2024Observed: 9.67 ft at 5:15PM Apr 19, 2024Observed: 9.66 ft at 5:30PM Apr 19, 2024Observed: 9.7 ft at 5:45PM Apr 19, 2024Observed: 9.7 ft at 6:00PM Apr 19, 2024Observed: 9.71 ft at 6:15PM Apr 19, 2024Observed: 9.7 ft at 6:30PM Apr 19, 2024Observed: 9.66 ft at 6:45PM Apr 19, 2024Observed: 9.71 ft at 7:00PM Apr 19, 2024Observed: 9.7 ft at 7:15PM Apr 19, 2024Observed: 9.69 ft at 7:30PM Apr 19, 2024Observed: 9.69 ft at 7:45PM Apr 19, 2024Observed: 9.69 ft at 8:00PM Apr 19, 2024Observed: 9.69 ft at 8:15PM Apr 19, 2024Observed: 9.69 ft at 8:30PM Apr 19, 2024Observed: 9.67 ft at 8:45PM Apr 19, 2024Observed: 9.68 ft at 9:00PM Apr 19, 2024Observed: 9.68 ft at 9:15PM Apr 19, 2024Observed: 9.67 ft at 9:30PM Apr 19, 2024Observed: 9.67 ft at 9:45PM Apr 19, 2024Observed: 9.67 ft at 10:00PM Apr 19, 2024Observed: 9.67 ft at 10:15PM Apr 19, 2024Observed: 9.67 ft at 10:30PM Apr 19, 2024Observed: 9.67 ft at 10:45PM Apr 19, 2024Observed: 9.66 ft at 11:00PM Apr 19, 2024Observed: 9.66 ft at 11:15PM Apr 19, 2024Observed: 9.66 ft at 11:30PM Apr 19, 2024Observed: 9.65 ft at 11:45PM Apr 19, 2024Observed: 9.65 ft at 12:00AM Apr 20, 2024Observed: 9.66 ft at 12:15AM Apr 20, 2024Observed: 9.64 ft at 12:30AM Apr 20, 2024Observed: 9.65 ft at 12:45AM Apr 20, 2024Observed: 9.65 ft at 1:00AM Apr 20, 2024Observed: 9.65 ft at 1:15AM Apr 20, 2024Highest Forecast: 9.6 ft 7:00AM Apr 20, 2024Forecast: 9.5 ft 1:00PM Apr 20, 2024Forecast: 9.5 ft 7:00PM Apr 20, 2024Forecast: 9.4 ft 1:00AM Apr 21, 2024Forecast: 9.3 ft 7:00AM Apr 21, 2024Forecast: 9.3 ft 1:00PM Apr 21, 2024Forecast: 9.2 ft 7:00PM Apr 21, 2024Forecast: 9.2 ft 1:00AM Apr 22, 2024Forecast: 9.1 ft 7:00AM Apr 22, 2024Forecast: 9.1 ft 1:00PM Apr 22, 2024Forecast: 9.1 ft 7:00PM Apr 22, 2024Forecast: 9.1 ft 1:00AM Apr 23, 2024Forecast: 9 ft 7:00AM Apr 23, 2024Forecast: 9 ft 1:00PM Apr 23, 2024Forecast: 9 ft 7:00PM Apr 23, 2024Forecast: 8.9 ft 1:00AM Apr 24, 2024Forecast: 8.9 ft 7:00AM Apr 24, 2024Forecast: 8.9 ft 1:00PM Apr 24, 2024Forecast: 8.8 ft 7:00PM Apr 24, 2024Forecast: 8.8 ft 1:00AM Apr 25, 2024Forecast: 8.7 ft 7:00AM Apr 25, 2024Forecast: 8.7 ft 1:00PM Apr 25, 2024Forecast: 8.6 ft 7:00PM Apr 25, 2024Forecast: 8.5 ft 1:00AM Apr 26, 2024Forecast: 8.5 ft 7:00AM Apr 26, 2024Forecast: 8.4 ft 1:00PM Apr 26, 2024Forecast: 8.4 ft 7:00PM Apr 26, 2024USGS--Water Resources of the United StatesBYRI2(plotting HGIRG) Graph Created (2:10AM Apr 20, 2024)ObservedForecast (issued 7:11PM Apr 19)Latest observed value: 9.65 ft at 1:15 AM CDT 20-Apr-2024. Flood Stage is 13 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Rock River at Byron are issued as needed during times of high water, but are not routinely available.

Return to Area Map
Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - at Dixon
Flood Categories (in feet)
Major Flood Stage: 16
Moderate Flood Stage: 14
Flood Stage: 13
Action Stage: 10.5
Low Stage (in feet): 4

Historic Crests
(1) 17.80 ft on 04/20/1973
(2) 17.08 ft on 04/20/2013
(3) 16.64 ft on 03/16/2019
(4) 16.50 ft on 07/25/2010
(5) 16.12 ft on 06/14/2000
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.11 ft on 05/18/2020
(2) 13.06 ft on 03/29/2020
(3) 14.42 ft on 10/04/2019
(4) 13.53 ft on 09/15/2019
(5) 13.00 ft on 05/31/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.33 ft on 09/09/2003
(2) 4.36 ft on 09/21/2012
(3) 4.44 ft on 10/16/2005

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
17 Water threatens structures at the water treatment plant in Byron.
16.5 Numerous residences are threatened between IL-2 and the river just northeast of Byron. River Road is threatened near the river just south of Byron.
16 The MercyHealth Clinic is threatened along Kysor Drive in Byron.
15.5 Water threatens lower sections of the water treatment plant property in Byron. Water threatens IL-2 west of Byron.
13.5 Numerous low-lying structures downstream of Byron are flooded.
13 Low-lying structures downstream of Byron are threatened.
12 Water inundates yards of several houses along River Road near Byron. Low-lying portions of Hamas Park and Sunshine Park are inundated.
10.5 Water begins to affect low-lying areas along the river near Byron.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
4.0 Approximate stage of the 1-in-10 annual chance flow (7-day average).
About This Location Collapse

Latitude: 42.123056° N, Longitude: 89.255833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 13 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 666.0 679.0 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:

Additional Information Collapse
How much forecast precipitation was used for the current river forecast?
How low could the river get?
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
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:29 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities