ALERT: November 15 update on the status of the nationwide data transmission error preventing stream gauge data collected at affected locations from being displayed on the Advanced Hydrologic Prediction Services (AHPS) webpages. As of 11/08/2018, The USGS has restored all impacted operational stream gauges to transmitting status. The status map of gauge outages from other agencies is here. The outage map will be updated each Thursday. We apologize for the service interruption and hope to have the data restored as soon as possible.

Weather Forecast Office Chicago, IL

North Central River Forecast Center

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental) Not Available

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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 Fox River at Dayton are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge

Flood Categories (in feet) Major Flood Stage: 24 Moderate Flood Stage: 14 Flood Stage: 12 Action Stage: 11 Low Stage (in feet): -9999 Historic Crests (1) 36.47 ft on 01/25/1960 (2) 33.19 ft on 02/11/1988 (3) 32.04 ft on 01/30/1952 (4) 32.00 ft on 01/10/1973 (5) 24.63 ft on 10/11/1954 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 12.06 ft on 01/24/2018 (P) (2) 15.08 ft on 10/16/2017 (P) (3) 14.40 ft on 07/23/2017 (P) (4) 14.46 ft on 05/02/2017 (5) 12.17 ft on 03/31/2017 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:15 Legend FEMA Layer Gauge Location 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

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15.5	Flooding begins of residences in Ottawa downstream of I and M canal.
14	Homes approximately 1 mile downstream of Wedron begin to flood.
12	The river begins to overflow banks in the lowest areas.
Photos (1) Looking downstream 12/15/2015. Stage = 11.91 ft. Image courtesy LaSalle Co EMA. (2) Looking upstream 12/15/2015. Stage = 11.91 ft. Image courtesy LaSalle Co EMA. (3) Looking upstream from bridge. Stage 7.12 feet. (4) Looking downstream from bridge. Stage 7.12 feet. (5) Looking downstream at massive ice jam 1/5/2010. (6) Looking upstream at massive ice jam 1/5/2010.

About This Location

Latitude: 41.383889° N, Longitude: 88.789722° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 12 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 29 462.3 ft 474.3 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: Corps of Engineers (COE) Info for Dayton U.S. Geological Survey (USGS) Data and Site Info for Dayton

Additional Information

How much forecast precipitation was used for the current river forecast? USGS Streamflow Duration Hydrograph How low could the river get?

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Flooding FAQ Precipitation Frequency Information Inundation Mapping Locations Mississippi and Illinois River Ice Information NWS Chicago River Ice Reports (Dec-Mar)

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Flood Damage Costs/Fatalities in the US, 1903 - 2014 AHPS Web Brochure U.S. Drought Monitor Snow Information Flood Safety USGS WaterAlert

Collaborative Agencies 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: 21-Dec-2016 5:20 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities