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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.



Hydrograph River at a Glance Download
Rock River at Byron Stage (ft)Flow (kcfs)Observed: 5.06 ft at 2:15AM Sep 16, 2023Observed: 5.06 ft at 2:30AM Sep 16, 2023Observed: 5.06 ft at 2:45AM Sep 16, 2023Observed: 5.06 ft at 3:00AM Sep 16, 2023Observed: 5.06 ft at 3:15AM Sep 16, 2023Observed: 5.06 ft at 4:30AM Sep 16, 2023Observed: 5.05 ft at 4:45AM Sep 16, 2023Observed: 5.05 ft at 5:00AM Sep 16, 2023Observed: 5.05 ft at 5:15AM Sep 16, 2023Observed: 5.06 ft at 5:30AM Sep 16, 2023Observed: 5.05 ft at 5:45AM Sep 16, 2023Observed: 5.05 ft at 6:00AM Sep 16, 2023Observed: 5.05 ft at 6:15AM Sep 16, 2023Observed: 5.05 ft at 6:30AM Sep 16, 2023Observed: 5.05 ft at 6:45AM Sep 16, 2023Observed: 5.05 ft at 7:00AM Sep 16, 2023Observed: 5.05 ft at 7:15AM Sep 16, 2023Observed: 5.05 ft at 7:30AM Sep 16, 2023Observed: 5.04 ft at 7:45AM Sep 16, 2023Observed: 5.04 ft at 8:00AM Sep 16, 2023Observed: 5.04 ft at 8:15AM Sep 16, 2023Observed: 5.04 ft at 8:30AM Sep 16, 2023Observed: 5.04 ft at 8:45AM Sep 16, 2023Observed: 5.05 ft at 9:00AM Sep 16, 2023Observed: 5.05 ft at 9:15AM Sep 16, 2023Observed: 5.05 ft at 9:30AM Sep 16, 2023Observed: 5.05 ft at 9:45AM Sep 16, 2023Observed: 5.05 ft at 10:00AM Sep 16, 2023Observed: 5.04 ft at 10:15AM Sep 16, 2023Observed: 5.04 ft at 10:30AM Sep 16, 2023Observed: 5.04 ft at 10:45AM Sep 16, 2023Observed: 5.04 ft at 11:00AM Sep 16, 2023Observed: 5.05 ft at 11:15AM Sep 16, 2023Observed: 5.04 ft at 12:30PM Sep 16, 2023Observed: 5.05 ft at 12:45PM Sep 16, 2023Observed: 5.04 ft at 1:00PM Sep 16, 2023Observed: 5.04 ft at 1:15PM Sep 16, 2023Observed: 5.04 ft at 1:30PM Sep 16, 2023Observed: 5.04 ft at 1:45PM Sep 16, 2023Observed: 5.04 ft at 2:00PM Sep 16, 2023Observed: 5.04 ft at 2:15PM Sep 16, 2023Observed: 5.04 ft at 2:30PM Sep 16, 2023Observed: 5.04 ft at 2:45PM Sep 16, 2023Observed: 5.04 ft at 3:00PM Sep 16, 2023Observed: 5.03 ft at 3:15PM Sep 16, 2023Observed: 5.03 ft at 3:30PM Sep 16, 2023Observed: 5.03 ft at 3:45PM Sep 16, 2023Observed: 5.03 ft at 4:00PM Sep 16, 2023Observed: 5.03 ft at 4:15PM Sep 16, 2023Observed: 5.03 ft at 4:30PM Sep 16, 2023Observed: 5.02 ft at 4:45PM Sep 16, 2023Observed: 5.02 ft at 5:00PM Sep 16, 2023Observed: 5.02 ft at 5:15PM Sep 16, 2023Observed: 5.02 ft at 5:30PM Sep 16, 2023Observed: 5.01 ft at 5:45PM Sep 16, 2023Observed: 5.02 ft at 6:00PM Sep 16, 2023Observed: 5.01 ft at 6:15PM Sep 16, 2023Observed: 5.02 ft at 6:30PM Sep 16, 2023Observed: 5.01 ft at 6:45PM Sep 16, 2023Observed: 5.01 ft at 7:00PM Sep 16, 2023Observed: 5.01 ft at 7:15PM Sep 16, 2023Observed: 5.02 ft at 7:30PM Sep 16, 2023Observed: 5.01 ft at 7:45PM Sep 16, 2023Observed: 5.01 ft at 8:00PM Sep 16, 2023Observed: 5.02 ft at 8:15PM Sep 16, 2023Observed: 5.04 ft at 8:30PM Sep 16, 2023Observed: 5.05 ft at 8:45PM Sep 16, 2023Observed: 5.04 ft at 9:00PM Sep 16, 2023Observed: 5.04 ft at 9:15PM Sep 16, 2023Observed: 5.04 ft at 9:30PM Sep 16, 2023Observed: 5.04 ft at 9:45PM Sep 16, 2023Observed: 5.04 ft at 10:00PM Sep 16, 2023Observed: 5.04 ft at 10:15PM Sep 16, 2023Observed: 5.05 ft at 10:30PM Sep 16, 2023Observed: 5.03 ft at 10:45PM Sep 16, 2023Observed: 5.03 ft at 11:00PM Sep 16, 2023Observed: 5.03 ft at 11:15PM Sep 16, 2023Observed: 5.03 ft at 11:30PM Sep 16, 2023Observed: 5.03 ft at 11:45PM Sep 16, 2023Observed: 5.03 ft at 12:00AM Sep 17, 2023Observed: 5.03 ft at 12:15AM Sep 17, 2023Observed: 5.03 ft at 12:30AM Sep 17, 2023Observed: 5.03 ft at 12:45AM Sep 17, 2023Observed: 5.03 ft at 1:00AM Sep 17, 2023Observed: 5.03 ft at 1:15AM Sep 17, 2023Observed: 5.03 ft at 1:30AM Sep 17, 2023Observed: 5.02 ft at 1:45AM Sep 17, 2023Observed: 5.03 ft at 2:00AM Sep 17, 2023Observed: 5.03 ft at 2:15AM Sep 17, 2023Observed: 5.03 ft at 2:30AM Sep 17, 2023Observed: 5.03 ft at 2:45AM Sep 17, 2023Observed: 5.03 ft at 3:00AM Sep 17, 2023Observed: 5.04 ft at 3:15AM Sep 17, 2023Observed: 5.04 ft at 3:30AM Sep 17, 2023Observed: 5.05 ft at 3:45AM Sep 17, 2023Observed: 5.05 ft at 4:00AM Sep 17, 2023Observed: 5.05 ft at 4:15AM Sep 17, 2023Observed: 5.06 ft at 4:30AM Sep 17, 2023Observed: 5.06 ft at 4:45AM Sep 17, 2023Observed: 5.06 ft at 5:00AM Sep 17, 2023Observed: 5.07 ft at 5:15AM Sep 17, 2023Observed: 5.08 ft at 5:30AM Sep 17, 2023Observed: 5.08 ft at 5:45AM Sep 17, 2023Observed: 5.08 ft at 6:00AM Sep 17, 2023Observed: 5.09 ft at 6:15AM Sep 17, 2023Observed: 5.09 ft at 6:30AM Sep 17, 2023Observed: 5.1 ft at 6:45AM Sep 17, 2023Observed: 5.1 ft at 7:00AM Sep 17, 2023Observed: 5.1 ft at 7:15AM Sep 17, 2023Observed: 5.12 ft at 8:30AM Sep 17, 2023Observed: 5.12 ft at 8:45AM Sep 17, 2023Observed: 5.12 ft at 9:00AM Sep 17, 2023Observed: 5.13 ft at 9:15AM Sep 17, 2023Observed: 5.13 ft at 9:30AM Sep 17, 2023Observed: 5.13 ft at 9:45AM Sep 17, 2023Observed: 5.14 ft at 10:00AM Sep 17, 2023Observed: 5.14 ft at 10:15AM Sep 17, 2023Observed: 5.15 ft at 10:30AM Sep 17, 2023Observed: 5.15 ft at 10:45AM Sep 17, 2023Observed: 5.15 ft at 11:00AM Sep 17, 2023Observed: 5.14 ft at 11:15AM Sep 17, 2023Observed: 5.15 ft at 11:30AM Sep 17, 2023Observed: 5.15 ft at 11:45AM Sep 17, 2023Observed: 5.15 ft at 12:00PM Sep 17, 2023Observed: 5.15 ft at 12:15PM Sep 17, 2023Observed: 5.15 ft at 12:30PM Sep 17, 2023Observed: 5.15 ft at 12:45PM Sep 17, 2023Observed: 5.16 ft at 1:00PM Sep 17, 2023Observed: 5.17 ft at 1:15PM Sep 17, 2023Observed: 5.17 ft at 2:30PM Sep 17, 2023Observed: 5.17 ft at 2:45PM Sep 17, 2023Observed: 5.18 ft at 3:00PM Sep 17, 2023Observed: 5.18 ft at 3:15PM Sep 17, 2023Observed: 5.18 ft at 3:30PM Sep 17, 2023Observed: 5.18 ft at 3:45PM Sep 17, 2023Observed: 5.18 ft at 4:00PM Sep 17, 2023Observed: 5.18 ft at 4:15PM Sep 17, 2023Observed: 5.18 ft at 4:30PM Sep 17, 2023Observed: 5.19 ft at 4:45PM Sep 17, 2023Observed: 5.19 ft at 5:00PM Sep 17, 2023Observed: 5.2 ft at 5:15PM Sep 17, 2023Observed: 5.23 ft at 7:30PM Sep 17, 2023Observed: 5.23 ft at 7:45PM Sep 17, 2023Observed: 5.23 ft at 8:00PM Sep 17, 2023Observed: 5.24 ft at 8:15PM Sep 17, 2023Observed: 5.24 ft at 8:30PM Sep 17, 2023Observed: 5.24 ft at 8:45PM Sep 17, 2023Observed: 5.25 ft at 9:00PM Sep 17, 2023Observed: 5.25 ft at 9:15PM Sep 17, 2023Observed: 5.25 ft at 9:30PM Sep 17, 2023Observed: 5.25 ft at 9:45PM Sep 17, 2023Observed: 5.25 ft at 10:00PM Sep 17, 2023Observed: 5.25 ft at 10:15PM Sep 17, 2023Observed: 5.25 ft at 10:30PM Sep 17, 2023Observed: 5.25 ft at 10:45PM Sep 17, 2023Observed: 5.25 ft at 11:00PM Sep 17, 2023Observed: 5.25 ft at 11:15PM Sep 17, 2023Observed: 5.25 ft at 11:30PM Sep 17, 2023Observed: 5.25 ft at 11:45PM Sep 17, 2023Observed: 5.25 ft at 12:00AM Sep 18, 2023Observed: 5.25 ft at 12:15AM Sep 18, 2023Observed: 5.25 ft at 12:30AM Sep 18, 2023Observed: 5.25 ft at 12:45AM Sep 18, 2023Observed: 5.24 ft at 1:00AM Sep 18, 2023Observed: 5.24 ft at 1:15AM Sep 18, 2023Observed: 5.24 ft at 1:30AM Sep 18, 2023Observed: 5.24 ft at 1:45AM Sep 18, 2023Observed: 5.23 ft at 2:00AM Sep 18, 2023Observed: 5.23 ft at 2:15AM Sep 18, 2023Observed: 5.23 ft at 2:30AM Sep 18, 2023Observed: 5.23 ft at 2:45AM Sep 18, 2023Observed: 5.22 ft at 3:00AM Sep 18, 2023Observed: 5.22 ft at 3:15AM Sep 18, 2023Observed: 5.22 ft at 3:30AM Sep 18, 2023Observed: 5.21 ft at 3:45AM Sep 18, 2023Observed: 5.21 ft at 4:00AM Sep 18, 2023Observed: 5.21 ft at 4:15AM Sep 18, 2023Observed: 5.21 ft at 4:30AM Sep 18, 2023Observed: 5.21 ft at 4:45AM Sep 18, 2023Observed: 5.21 ft at 5:00AM Sep 18, 2023Observed: 5.2 ft at 5:15AM Sep 18, 2023Observed: 5.2 ft at 5:30AM Sep 18, 2023Observed: 5.2 ft at 5:45AM Sep 18, 2023Observed: 5.2 ft at 6:00AM Sep 18, 2023Observed: 5.2 ft at 6:15AM Sep 18, 2023Observed: 5.19 ft at 7:30AM Sep 18, 2023Observed: 5.19 ft at 7:45AM Sep 18, 2023Observed: 5.19 ft at 8:00AM Sep 18, 2023Observed: 5.19 ft at 8:15AM Sep 18, 2023Observed: 5.19 ft at 8:30AM Sep 18, 2023Observed: 5.19 ft at 8:45AM Sep 18, 2023Observed: 5.19 ft at 9:00AM Sep 18, 2023Observed: 5.19 ft at 9:15AM Sep 18, 2023Observed: 5.19 ft at 9:30AM Sep 18, 2023Observed: 5.19 ft at 9:45AM Sep 18, 2023Observed: 5.19 ft at 10:00AM Sep 18, 2023Observed: 5.2 ft at 10:15AM Sep 18, 2023Observed: 5.19 ft at 10:30AM Sep 18, 2023Observed: 5.2 ft at 10:45AM Sep 18, 2023Observed: 5.19 ft at 11:00AM Sep 18, 2023Observed: 5.2 ft at 11:15AM Sep 18, 2023Observed: 5.2 ft at 12:30PM Sep 18, 2023Observed: 5.19 ft at 12:45PM Sep 18, 2023Observed: 5.2 ft at 1:00PM Sep 18, 2023Observed: 5.2 ft at 1:15PM Sep 18, 2023Observed: 5.2 ft at 1:30PM Sep 18, 2023Observed: 5.2 ft at 1:45PM Sep 18, 2023Observed: 5.19 ft at 2:00PM Sep 18, 2023Observed: 5.2 ft at 2:15PM Sep 18, 2023Observed: 5.19 ft at 2:30PM Sep 18, 2023Observed: 5.19 ft at 2:45PM Sep 18, 2023Observed: 5.19 ft at 3:00PM Sep 18, 2023Observed: 5.2 ft at 3:15PM Sep 18, 2023Observed: 5.19 ft at 4:30PM Sep 18, 2023Observed: 5.19 ft at 4:45PM Sep 18, 2023Observed: 5.2 ft at 5:00PM Sep 18, 2023Observed: 5.2 ft at 5:15PM Sep 18, 2023Observed: 5.2 ft at 5:30PM Sep 18, 2023Observed: 5.2 ft at 5:45PM Sep 18, 2023Observed: 5.19 ft at 6:00PM Sep 18, 2023Observed: 5.2 ft at 6:15PM Sep 18, 2023Observed: 5.2 ft at 6:30PM Sep 18, 2023Observed: 5.2 ft at 6:45PM Sep 18, 2023Observed: 5.19 ft at 7:00PM Sep 18, 2023Observed: 5.19 ft at 7:15PM Sep 18, 2023Observed: 5.19 ft at 7:30PM Sep 18, 2023Observed: 5.19 ft at 7:45PM Sep 18, 2023Observed: 5.19 ft at 8:00PM Sep 18, 2023Observed: 5.2 ft at 8:15PM Sep 18, 2023Observed: 5.19 ft at 8:30PM Sep 18, 2023Observed: 5.19 ft at 8:45PM Sep 18, 2023Observed: 5.2 ft at 9:00PM Sep 18, 2023Observed: 5.19 ft at 9:15PM Sep 18, 2023Observed: 5.2 ft at 9:30PM Sep 18, 2023Observed: 5.19 ft at 9:45PM Sep 18, 2023Observed: 5.19 ft at 10:00PM Sep 18, 2023Observed: 5.19 ft at 10:15PM Sep 18, 2023Observed: 5.19 ft at 10:30PM Sep 18, 2023Observed: 5.19 ft at 10:45PM Sep 18, 2023Observed: 5.19 ft at 11:00PM Sep 18, 2023Observed: 5.19 ft at 11:15PM Sep 18, 2023Observed: 5.19 ft at 11:30PM Sep 18, 2023Observed: 5.19 ft at 11:45PM Sep 18, 2023Observed: 5.19 ft at 12:00AM Sep 19, 2023Observed: 5.19 ft at 12:15AM Sep 19, 2023Observed: 5.19 ft at 12:30AM Sep 19, 2023Observed: 5.19 ft at 12:45AM Sep 19, 2023Observed: 5.19 ft at 1:00AM Sep 19, 2023Observed: 5.19 ft at 1:15AM Sep 19, 2023Observed: 5.19 ft at 1:30AM Sep 19, 2023Observed: 5.18 ft at 1:45AM Sep 19, 2023Observed: 5.19 ft at 2:00AM Sep 19, 2023Observed: 5.19 ft at 2:15AM Sep 19, 2023Observed: 5.18 ft at 2:30AM Sep 19, 2023Observed: 5.18 ft at 2:45AM Sep 19, 2023Observed: 5.18 ft at 3:00AM Sep 19, 2023Observed: 5.18 ft at 3:15AM Sep 19, 2023Observed: 5.19 ft at 3:30AM Sep 19, 2023Observed: 5.19 ft at 3:45AM Sep 19, 2023Observed: 5.19 ft at 4:00AM Sep 19, 2023Observed: 5.19 ft at 4:15AM Sep 19, 2023Observed: 5.19 ft at 4:30AM Sep 19, 2023Observed: 5.18 ft at 4:45AM Sep 19, 2023Observed: 5.18 ft at 5:00AM Sep 19, 2023Observed: 5.18 ft at 5:15AM Sep 19, 2023Observed: 5.19 ft at 6:30AM Sep 19, 2023Observed: 5.19 ft at 6:45AM Sep 19, 2023Observed: 5.19 ft at 7:00AM Sep 19, 2023Observed: 5.19 ft at 7:15AM Sep 19, 2023Observed: 5.19 ft at 7:30AM Sep 19, 2023Observed: 5.18 ft at 7:45AM Sep 19, 2023Observed: 5.18 ft at 8:00AM Sep 19, 2023Observed: 5.18 ft at 8:15AM Sep 19, 2023Observed: 5.18 ft at 8:30AM Sep 19, 2023Observed: 5.18 ft at 8:45AM Sep 19, 2023Observed: 5.18 ft at 9:00AM Sep 19, 2023Observed: 5.18 ft at 9:15AM Sep 19, 2023Observed: 5.18 ft at 9:30AM Sep 19, 2023Observed: 5.18 ft at 9:45AM Sep 19, 2023Observed: 5.18 ft at 10:00AM Sep 19, 2023Observed: 5.18 ft at 10:15AM Sep 19, 2023Observed: 5.18 ft at 11:30AM Sep 19, 2023Observed: 5.18 ft at 11:45AM Sep 19, 2023Observed: 5.18 ft at 12:00PM Sep 19, 2023Observed: 5.18 ft at 12:15PM Sep 19, 2023Observed: 5.18 ft at 12:30PM Sep 19, 2023Observed: 5.18 ft at 12:45PM Sep 19, 2023Observed: 5.18 ft at 1:00PM Sep 19, 2023Observed: 5.18 ft at 1:15PM Sep 19, 2023Observed: 5.18 ft at 1:30PM Sep 19, 2023Observed: 5.19 ft at 1:45PM Sep 19, 2023Observed: 5.19 ft at 2:00PM Sep 19, 2023Observed: 5.19 ft at 2:15PM Sep 19, 2023Observed: 5.19 ft at 2:30PM Sep 19, 2023Observed: 5.19 ft at 2:45PM Sep 19, 2023Observed: 5.19 ft at 3:00PM Sep 19, 2023Observed: 5.18 ft at 3:15PM Sep 19, 2023Observed: 5.19 ft at 3:30PM Sep 19, 2023Observed: 5.19 ft at 3:45PM Sep 19, 2023Observed: 5.2 ft at 4:00PM Sep 19, 2023Observed: 5.19 ft at 4:15PM Sep 19, 2023Observed: 5.19 ft at 4:30PM Sep 19, 2023Observed: 5.19 ft at 4:45PM Sep 19, 2023Observed: 5.19 ft at 5:00PM Sep 19, 2023Observed: 5.17 ft at 5:15PM Sep 19, 2023Observed: 5.18 ft at 5:30PM Sep 19, 2023Observed: 5.19 ft at 5:45PM Sep 19, 2023Observed: 5.18 ft at 6:00PM Sep 19, 2023Observed: 5.18 ft at 6:15PM Sep 19, 2023Observed: 5.17 ft at 6:30PM Sep 19, 2023Observed: 5.18 ft at 6:45PM Sep 19, 2023Observed: 5.17 ft at 7:00PM Sep 19, 2023Observed: 5.17 ft at 7:15PM Sep 19, 2023Observed: 5.17 ft at 7:30PM Sep 19, 2023Observed: 5.17 ft at 7:45PM Sep 19, 2023Observed: 5.17 ft at 8:00PM Sep 19, 2023Observed: 5.17 ft at 8:15PM Sep 19, 2023Observed: 5.17 ft at 8:30PM Sep 19, 2023Observed: 5.17 ft at 8:45PM Sep 19, 2023Observed: 5.18 ft at 9:00PM Sep 19, 2023Observed: 5.17 ft at 9:15PM Sep 19, 2023Observed: 5.18 ft at 9:30PM Sep 19, 2023Observed: 5.18 ft at 9:45PM Sep 19, 2023Observed: 5.18 ft at 10:00PM Sep 19, 2023Observed: 5.18 ft at 10:15PM Sep 19, 2023Observed: 5.18 ft at 10:30PM Sep 19, 2023Observed: 5.18 ft at 10:45PM Sep 19, 2023Observed: 5.18 ft at 11:00PM Sep 19, 2023Observed: 5.18 ft at 11:15PM Sep 19, 2023Observed: 5.19 ft at 11:30PM Sep 19, 2023Observed: 5.18 ft at 11:45PM Sep 19, 2023Observed: 5.18 ft at 12:00AM Sep 20, 2023Observed: 5.19 ft at 12:15AM Sep 20, 2023Observed: 5.19 ft at 12:30AM Sep 20, 2023Observed: 5.19 ft at 12:45AM Sep 20, 2023Observed: 5.18 ft at 1:00AM Sep 20, 2023Observed: 5.19 ft at 1:15AM Sep 20, 2023Observed: 5.19 ft at 1:30AM Sep 20, 2023Observed: 5.2 ft at 1:45AM Sep 20, 2023Observed: 5.2 ft at 2:00AM Sep 20, 2023Observed: 5.2 ft at 2:15AM Sep 20, 2023Observed: 5.2 ft at 2:30AM Sep 20, 2023Observed: 5.21 ft at 2:45AM Sep 20, 2023Observed: 5.2 ft at 3:00AM Sep 20, 2023Observed: 5.2 ft at 3:15AM Sep 20, 2023Observed: 5.2 ft at 3:30AM Sep 20, 2023Observed: 5.21 ft at 3:45AM Sep 20, 2023Observed: 5.2 ft at 4:00AM Sep 20, 2023Observed: 5.2 ft at 4:15AM Sep 20, 2023Observed: 5.21 ft at 4:30AM Sep 20, 2023Observed: 5.2 ft at 4:45AM Sep 20, 2023Observed: 5.21 ft at 5:00AM Sep 20, 2023Observed: 5.21 ft at 5:15AM Sep 20, 2023Observed: 5.21 ft at 5:30AM Sep 20, 2023Observed: 5.2 ft at 5:45AM Sep 20, 2023Observed: 5.2 ft at 6:00AM Sep 20, 2023Observed: 5.2 ft at 6:15AM Sep 20, 2023Observed: 5.2 ft at 6:30AM Sep 20, 2023Observed: 5.2 ft at 6:45AM Sep 20, 2023Observed: 5.2 ft at 7:00AM Sep 20, 2023Observed: 5.2 ft at 7:15AM Sep 20, 2023Observed: 5.2 ft at 7:30AM Sep 20, 2023Observed: 5.2 ft at 7:45AM Sep 20, 2023Observed: 5.21 ft at 8:00AM Sep 20, 2023Observed: 5.2 ft at 8:15AM Sep 20, 2023Observed: 5.21 ft at 8:30AM Sep 20, 2023Observed: 5.2 ft at 8:45AM Sep 20, 2023Observed: 5.21 ft at 9:00AM Sep 20, 2023Observed: 5.2 ft at 9:15AM Sep 20, 2023Observed: 5.2 ft at 9:30AM Sep 20, 2023Observed: 5.2 ft at 9:45AM Sep 20, 2023Observed: 5.2 ft at 10:00AM Sep 20, 2023Observed: 5.2 ft at 10:15AM Sep 20, 2023Observed: 5.21 ft at 10:30AM Sep 20, 2023Observed: 5.21 ft at 10:45AM Sep 20, 2023Observed: 5.21 ft at 11:00AM Sep 20, 2023Observed: 5.21 ft at 11:15AM Sep 20, 2023Observed: 5.21 ft at 11:30AM Sep 20, 2023Observed: 5.21 ft at 11:45AM Sep 20, 2023Observed: 5.21 ft at 12:00PM Sep 20, 2023Observed: 5.21 ft at 12:15PM Sep 20, 2023Observed: 5.21 ft at 12:30PM Sep 20, 2023Observed: 5.21 ft at 12:45PM Sep 20, 2023Observed: 5.21 ft at 1:00PM Sep 20, 2023Observed: 5.21 ft at 1:15PM Sep 20, 2023Observed: 5.21 ft at 1:30PM Sep 20, 2023Observed: 5.21 ft at 1:45PM Sep 20, 2023Observed: 5.21 ft at 2:00PM Sep 20, 2023Observed: 5.21 ft at 2:15PM Sep 20, 2023Observed: 5.21 ft at 2:30PM Sep 20, 2023Observed: 5.2 ft at 2:45PM Sep 20, 2023Observed: 5.2 ft at 3:00PM Sep 20, 2023Observed: 5.2 ft at 3:15PM Sep 20, 2023Observed: 5.2 ft at 3:30PM Sep 20, 2023Observed: 5.2 ft at 3:45PM Sep 20, 2023Observed: 5.2 ft at 4:00PM Sep 20, 2023Observed: 5.2 ft at 4:15PM Sep 20, 2023Observed: 5.19 ft at 5:30PM Sep 20, 2023Observed: 5.19 ft at 5:45PM Sep 20, 2023Observed: 5.18 ft at 6:00PM Sep 20, 2023Observed: 5.18 ft at 6:15PM Sep 20, 2023Observed: 5.18 ft at 6:30PM Sep 20, 2023Observed: 5.18 ft at 6:45PM Sep 20, 2023Observed: 5.18 ft at 7:00PM Sep 20, 2023Observed: 5.17 ft at 7:15PM Sep 20, 2023Observed: 5.18 ft at 7:30PM Sep 20, 2023Observed: 5.18 ft at 7:45PM Sep 20, 2023Observed: 5.17 ft at 8:00PM Sep 20, 2023Observed: 5.18 ft at 8:15PM Sep 20, 2023Observed: 5.17 ft at 8:30PM Sep 20, 2023Observed: 5.17 ft at 8:45PM Sep 20, 2023Observed: 5.17 ft at 9:00PM Sep 20, 2023Observed: 5.17 ft at 9:15PM Sep 20, 2023Observed: 5.17 ft at 9:30PM Sep 20, 2023Observed: 5.17 ft at 9:45PM Sep 20, 2023Observed: 5.17 ft at 10:00PM Sep 20, 2023Observed: 5.17 ft at 10:15PM Sep 20, 2023Observed: 5.17 ft at 10:30PM Sep 20, 2023Observed: 5.17 ft at 10:45PM Sep 20, 2023Observed: 5.17 ft at 11:00PM Sep 20, 2023Observed: 5.17 ft at 11:15PM Sep 20, 2023Observed: 5.17 ft at 11:30PM Sep 20, 2023Observed: 5.17 ft at 11:45PM Sep 20, 2023Observed: 5.17 ft at 12:00AM Sep 21, 2023Observed: 5.17 ft at 12:15AM Sep 21, 2023Observed: 5.17 ft at 1:30AM Sep 21, 2023Observed: 5.17 ft at 1:45AM Sep 21, 2023Observed: 5.16 ft at 2:00AM Sep 21, 2023Observed: 5.17 ft at 2:15AM Sep 21, 2023Observed: 5.17 ft at 2:30AM Sep 21, 2023Observed: 5.17 ft at 2:45AM Sep 21, 2023Observed: 5.17 ft at 3:00AM Sep 21, 2023Observed: 5.17 ft at 3:15AM Sep 21, 2023Observed: 5.17 ft at 3:30AM Sep 21, 2023Observed: 5.17 ft at 3:45AM Sep 21, 2023Observed: 5.18 ft at 4:00AM Sep 21, 2023Observed: 5.18 ft at 4:15AM Sep 21, 2023Observed: 5.18 ft at 4:30AM Sep 21, 2023Observed: 5.18 ft at 4:45AM Sep 21, 2023Observed: 5.19 ft at 5:00AM Sep 21, 2023Observed: 5.19 ft at 5:15AM Sep 21, 2023Observed: 5.19 ft at 5:30AM Sep 21, 2023Observed: 5.2 ft at 5:45AM Sep 21, 2023Observed: 5.2 ft at 6:00AM Sep 21, 2023Observed: 5.21 ft at 6:15AM Sep 21, 2023Observed: 5.21 ft at 6:30AM Sep 21, 2023Observed: 5.22 ft at 6:45AM Sep 21, 2023Observed: 5.22 ft at 7:00AM Sep 21, 2023Observed: 5.23 ft at 7:15AM Sep 21, 2023Observed: 5.24 ft at 7:30AM Sep 21, 2023Observed: 5.24 ft at 7:45AM Sep 21, 2023Observed: 5.25 ft at 8:00AM Sep 21, 2023Observed: 5.26 ft at 8:15AM Sep 21, 2023Observed: 5.27 ft at 8:30AM Sep 21, 2023Observed: 5.27 ft at 8:45AM Sep 21, 2023Observed: 5.27 ft at 9:00AM Sep 21, 2023Observed: 5.28 ft at 9:15AM Sep 21, 2023Observed: 5.29 ft at 9:30AM Sep 21, 2023Observed: 5.28 ft at 9:45AM Sep 21, 2023Observed: 5.29 ft at 10:00AM Sep 21, 2023Observed: 5.3 ft at 10:15AM Sep 21, 2023Observed: 5.31 ft at 10:30AM Sep 21, 2023Observed: 5.31 ft at 10:45AM Sep 21, 2023Observed: 5.31 ft at 11:00AM Sep 21, 2023Observed: 5.32 ft at 11:15AM Sep 21, 2023Observed: 5.32 ft at 11:30AM Sep 21, 2023Observed: 5.32 ft at 11:45AM Sep 21, 2023Observed: 5.32 ft at 12:00PM Sep 21, 2023Observed: 5.33 ft at 12:15PM Sep 21, 2023Observed: 5.33 ft at 12:30PM Sep 21, 2023Observed: 5.34 ft at 12:45PM Sep 21, 2023Observed: 5.34 ft at 1:00PM Sep 21, 2023Observed: 5.34 ft at 1:15PM Sep 21, 2023Observed: 5.34 ft at 1:30PM Sep 21, 2023Observed: 5.34 ft at 1:45PM Sep 21, 2023Observed: 5.34 ft at 2:00PM Sep 21, 2023Observed: 5.34 ft at 2:15PM Sep 21, 2023Observed: 5.33 ft at 3:30PM Sep 21, 2023Observed: 5.34 ft at 3:45PM Sep 21, 2023Observed: 5.34 ft at 4:00PM Sep 21, 2023Observed: 5.34 ft at 4:15PM Sep 21, 2023Observed: 5.34 ft at 4:30PM Sep 21, 2023Highest Observation: 5.35 ft at 4:45PM Sep 21, 2023Highest Observation: 5.35 ft at 5:00PM Sep 21, 2023Highest Observation: 5.35 ft at 5:15PM Sep 21, 2023Highest Observation: 5.35 ft at 5:30PM Sep 21, 2023Observed: 5.34 ft at 5:45PM Sep 21, 2023Highest Observation: 5.35 ft at 6:00PM Sep 21, 2023Highest Observation: 5.35 ft at 6:15PM Sep 21, 2023Observed: 5.34 ft at 7:30PM Sep 21, 2023Observed: 5.34 ft at 7:45PM Sep 21, 2023Observed: 5.34 ft at 8:00PM Sep 21, 2023Observed: 5.34 ft at 8:15PM Sep 21, 2023Observed: 5.34 ft at 8:30PM Sep 21, 2023Observed: 5.34 ft at 8:45PM Sep 21, 2023Observed: 5.34 ft at 9:00PM Sep 21, 2023Observed: 5.34 ft at 9:15PM Sep 21, 2023Observed: 5.34 ft at 9:30PM Sep 21, 2023Observed: 5.34 ft at 9:45PM Sep 21, 2023Observed: 5.34 ft at 10:00PM Sep 21, 2023Observed: 5.33 ft at 10:15PM Sep 21, 2023Observed: 5.33 ft at 10:30PM Sep 21, 2023Observed: 5.33 ft at 10:45PM Sep 21, 2023Observed: 5.33 ft at 11:00PM Sep 21, 2023Observed: 5.33 ft at 11:15PM Sep 21, 2023Observed: 5.33 ft at 11:30PM Sep 21, 2023Observed: 5.33 ft at 11:45PM Sep 21, 2023Observed: 5.33 ft at 12:00AM Sep 22, 2023Observed: 5.33 ft at 12:15AM Sep 22, 2023Observed: 5.33 ft at 12:30AM Sep 22, 2023Observed: 5.33 ft at 12:45AM Sep 22, 2023Observed: 5.33 ft at 1:00AM Sep 22, 2023Observed: 5.33 ft at 1:15AM Sep 22, 2023Observed: 5.33 ft at 1:30AM Sep 22, 2023Observed: 5.33 ft at 1:45AM Sep 22, 2023Observed: 5.33 ft at 2:00AM Sep 22, 2023Observed: 5.33 ft at 2:15AM Sep 22, 2023Observed: 5.33 ft at 2:30AM Sep 22, 2023Observed: 5.33 ft at 2:45AM Sep 22, 2023Observed: 5.33 ft at 3:00AM Sep 22, 2023Observed: 5.33 ft at 3:15AM Sep 22, 2023Observed: 5.33 ft at 3:30AM Sep 22, 2023Observed: 5.33 ft at 3:45AM Sep 22, 2023Observed: 5.33 ft at 4:00AM Sep 22, 2023Observed: 5.33 ft at 4:15AM Sep 22, 2023Observed: 5.33 ft at 4:30AM Sep 22, 2023Observed: 5.33 ft at 4:45AM Sep 22, 2023Observed: 5.34 ft at 5:00AM Sep 22, 2023Observed: 5.33 ft at 5:15AM Sep 22, 2023Observed: 5.33 ft at 5:30AM Sep 22, 2023Observed: 5.33 ft at 5:45AM Sep 22, 2023Observed: 5.33 ft at 6:00AM Sep 22, 2023Observed: 5.33 ft at 6:15AM Sep 22, 2023Observed: 5.33 ft at 6:30AM Sep 22, 2023Observed: 5.34 ft at 6:45AM Sep 22, 2023Observed: 5.34 ft at 7:00AM Sep 22, 2023Observed: 5.33 ft at 7:15AM Sep 22, 2023Observed: 5.34 ft at 7:30AM Sep 22, 2023Observed: 5.33 ft at 7:45AM Sep 22, 2023Observed: 5.33 ft at 8:00AM Sep 22, 2023Observed: 5.33 ft at 8:15AM Sep 22, 2023Observed: 5.32 ft at 8:30AM Sep 22, 2023Observed: 5.33 ft at 8:45AM Sep 22, 2023Observed: 5.32 ft at 9:00AM Sep 22, 2023Observed: 5.32 ft at 9:15AM Sep 22, 2023Observed: 5.32 ft at 9:30AM Sep 22, 2023Observed: 5.31 ft at 9:45AM Sep 22, 2023Observed: 5.32 ft at 10:00AM Sep 22, 2023Observed: 5.32 ft at 10:15AM Sep 22, 2023Observed: 5.31 ft at 10:30AM Sep 22, 2023Observed: 5.32 ft at 10:45AM Sep 22, 2023Observed: 5.3 ft at 11:00AM Sep 22, 2023Observed: 5.31 ft at 11:15AM Sep 22, 2023Observed: 5.31 ft at 11:30AM Sep 22, 2023Observed: 5.32 ft at 11:45AM Sep 22, 2023Observed: 5.32 ft at 12:00PM Sep 22, 2023Observed: 5.32 ft at 12:15PM Sep 22, 2023Observed: 5.3 ft at 12:30PM Sep 22, 2023Observed: 5.3 ft at 12:45PM Sep 22, 2023Observed: 5.32 ft at 1:00PM Sep 22, 2023Observed: 5.31 ft at 1:15PM Sep 22, 2023Observed: 5.32 ft at 1:30PM Sep 22, 2023Observed: 5.31 ft at 1:45PM Sep 22, 2023Observed: 5.3 ft at 2:00PM Sep 22, 2023Observed: 5.31 ft at 2:15PM Sep 22, 2023Observed: 5.3 ft at 3:30PM Sep 22, 2023Observed: 5.3 ft at 3:45PM Sep 22, 2023Observed: 5.29 ft at 4:00PM Sep 22, 2023Observed: 5.29 ft at 4:15PM Sep 22, 2023Observed: 5.29 ft at 4:30PM Sep 22, 2023Observed: 5.29 ft at 4:45PM Sep 22, 2023Observed: 5.28 ft at 5:00PM Sep 22, 2023Observed: 5.28 ft at 5:15PM Sep 22, 2023Observed: 5.28 ft at 5:30PM Sep 22, 2023Observed: 5.28 ft at 5:45PM Sep 22, 2023Observed: 5.27 ft at 6:00PM Sep 22, 2023Observed: 5.28 ft at 6:15PM Sep 22, 2023Observed: 5.27 ft at 6:30PM Sep 22, 2023Observed: 5.27 ft at 6:45PM Sep 22, 2023Observed: 5.26 ft at 7:00PM Sep 22, 2023Observed: 5.27 ft at 7:15PM Sep 22, 2023Observed: 5.27 ft at 7:30PM Sep 22, 2023Observed: 5.27 ft at 7:45PM Sep 22, 2023Observed: 5.27 ft at 8:00PM Sep 22, 2023Observed: 5.27 ft at 8:15PM Sep 22, 2023Observed: 5.27 ft at 8:30PM Sep 22, 2023Observed: 5.27 ft at 8:45PM Sep 22, 2023Observed: 5.27 ft at 9:00PM Sep 22, 2023Observed: 5.27 ft at 9:15PM Sep 22, 2023Observed: 5.27 ft at 9:30PM Sep 22, 2023Observed: 5.27 ft at 9:45PM Sep 22, 2023Observed: 5.27 ft at 10:00PM Sep 22, 2023Observed: 5.27 ft at 10:15PM Sep 22, 2023Observed: 5.27 ft at 10:30PM Sep 22, 2023Observed: 5.28 ft at 10:45PM Sep 22, 2023Observed: 5.27 ft at 11:00PM Sep 22, 2023Observed: 5.27 ft at 11:15PM Sep 22, 2023Observed: 5.28 ft at 11:30PM Sep 22, 2023Observed: 5.27 ft at 11:45PM Sep 22, 2023Observed: 5.28 ft at 12:00AM Sep 23, 2023Observed: 5.27 ft at 12:15AM Sep 23, 2023Observed: 5.27 ft at 12:30AM Sep 23, 2023Observed: 5.28 ft at 12:45AM Sep 23, 2023Observed: 5.28 ft at 1:00AM Sep 23, 2023Observed: 5.28 ft at 1:15AM Sep 23, 2023USGS--Water Resources of the United StatesBYRI2(plotting HGIRG) Graph Created (2:10AM Sep 23, 2023)ObservedLatest observed value: 5.28 ft at 1:15 AM CDT 23-Sep-2023. Flood Stage is 13 ft
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Tabular Data (UTC)
Tabular Data (CDT)
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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.

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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
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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
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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
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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:
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How much forecast precipitation was used for the current river forecast?
How low could the river get?
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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
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Romeoville, IL 60446
(815) 834-1435
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