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 Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Chicago, IL

North Central River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CST) Datum: NAVD88 Metadata

NOTE: Graphical forecasts are not available for the Indiana Harbor Canal at East Chicago (Lake Michigan outlet). During times of high water, forecast crest information can be found in the text products.

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Flood Categories (in feet) Major Flood Stage: 15.5 Moderate Flood Stage: 14.5 Flood Stage: 13 Action Stage: 11.5 Low Stage (in feet): -9999 Historic Crests (1) 14.35 ft on 04/30/2020 (P) (2) 14.28 ft on 08/11/2020 (P) (3) 14.25 ft on 01/11/2020 (4) 14.12 ft on 06/03/2020 (P) (5) 14.05 ft on 07/20/2019 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 14.28 ft on 08/11/2020 (P) (2) 13.95 ft on 07/10/2020 (P) (3) 14.12 ft on 06/03/2020 (P) (4) 14.35 ft on 04/30/2020 (P) (5) 13.74 ft on 03/06/2020 (P) Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available.

Zoom Level:16 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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18	I-90 threatened near 141st Street in Hammond.
16	Numerous residences threatened near East Chicago Central High School.
15	Without flood protection, numerous roadways and structures are threatened near Lake George and Wolf Lake in Hammond and Whiting. Indianapolis Boulevard threatened near McShane Avenue in East Chicago. Gary Airport service road threatened.
14.5	Without flood protection, park land and athletic fields are inundated near Wolf Lake and Lake George in Hammond and Whiting.
14	Without flood protection, US-41 (Calumet Avenue) is threatened at 129 Street and at I-90 in Hammond.
13	Without flood protection, water begins to move through the Lake George Canal into Lake George and Wolf Lake in Hammond and Whiting.
12	Low-lying sections of Goodman Park threatened in East Chicago.
11.5	Water overtops low-lying banks along Grand Calumet River at the confluence with the Indiana Harbor Canal.
11	Water overtops low-lying banks along the Indiana Harbor Canal and the Lake George Canal in Hammond and East Chicago.
9	Water begins to flow toward the Calumet River through the Indiana Harbor Canal and the Grand Calumet River.

About This Location

Latitude: 41.649167° N, Longitude: 87.468611° W, Horizontal Datum: NAD27 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 569.89 582.89 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 570.20 583.2 Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other 569.46 582.46 IGLD85 Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for East Chicago (Lake Michigan outlet)

Additional Information

Forecasts from the National Ocean Service (NOS) Lake Michigan and Huron Operational Forecast System (LMHOFS) Forecasts from the Great Lakes Environmental Research Laboratory (GLERL) Great Lakes Coastal Forecasting System (GLCFS)

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary USGS WaterAlert Gauge Notifications Drought Information Snow Cover Information Flood Safety NWS Chicago Hydrology Program Hydrology of North Illinois and Northwest Indiana

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management

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: 2-Nov-2020 7:29 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities