Station Name: ILLINOIS RIVER AT SENECA, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 499 feet

Nearest Address:
511 N 2553rd Rd
Seneca, IL 61341
La Salle County

GPS Coordinates: 41.2997222, -88.6141667

Nearby Water Temperatures

Flood Warning issued April 18 at 5:48AM CDT by NWS Chicago IL

Effective: Sat April 18, 2026, 5:48 AM
Expires: Sun April 19, 2026, 12:00 AM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at La Salle affecting Bureau, Putnam and La Salle Counties. For the Illinois River (Upper)...including La Salle...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...From early this morning until further notice. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. At 22.0 feet, Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river. * ADDITIONAL DETAILS... - At 4:45 AM CDT Saturday the stage was 20.5 feet. - Recent Activity...The river rose into minor flood stage last night. - Forecast...The river is expected to continue rising and crest near 23.5 feet on Sunday. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.

Flood Warning issued April 18 at 5:44AM CDT until April 21 at 1:00PM CDT by NWS Chicago IL

Effective: Sat April 18, 2026, 5:44 AM
Expires: Sat April 18, 2026, 11:45 PM

...The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. For the Illinois River (Upper)...including Ottawa...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Illinois River from Heritage Harbor east of Ottawa downstream to Starved Rock Lock and Dam, including the Ottawa gauge. * WHEN...From this afternoon to early Tuesday afternoon. * IMPACTS...At 462.5 feet, Roadway entrance to Allen Park threatened in Ottawa. Allen Park west boat ramp inundated in Ottawa. At 464.0 feet, Backwater causes the Fox River to reach bankfull near St. Elizabeth Medical Center in Ottawa. * ADDITIONAL DETAILS... - At 4:30 AM CDT Saturday the stage was 462.2 feet. - Forecast...The river is expected to rise above flood stage later today. - Flood stage is 463.0 feet. - http://www.weather.gov/safety/flood

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by this evening.

Flood Warning issued April 18 at 12:53PM CDT by NWS Chicago IL

Effective: Sat April 18, 2026, 12:53 PM
Expires: Sun April 19, 2026, 7:00 AM

...The Flood Warning continues for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. Illinois River at La Salle affecting La Salle, Putnam and Bureau Counties. For the Illinois River (Upper)...including Morris, Ottawa, La Salle...Minor flooding is forecast. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until further notice. * IMPACTS...At 22.0 feet, Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river. * ADDITIONAL DETAILS... - At 11:45 AM CDT Saturday the stage was 21.0 feet. - Forecast...The river is expected to rise to a crest of 23.0 feet Monday morning. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Sunday morning.

Flood Warning issued April 18 at 12:53PM CDT until April 20 at 10:00PM CDT by NWS Chicago IL

Effective: Sat April 18, 2026, 12:53 PM
Expires: Sun April 19, 2026, 7:00 AM

...The Flood Warning continues for the following rivers in Illinois... Illinois River at Ottawa affecting La Salle County. Illinois River at La Salle affecting La Salle, Putnam and Bureau Counties. For the Illinois River (Upper)...including Morris, Ottawa, La Salle...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Illinois River from Heritage Harbor east of Ottawa downstream to Starved Rock Lock and Dam, including the Ottawa gauge. * WHEN...From this evening to late Monday evening. * IMPACTS...At 464.0 feet, Backwater causes the Fox River to reach bankfull near St. Elizabeth Medical Center in Ottawa. * ADDITIONAL DETAILS... - At 12:30 PM CDT Saturday the stage was 462.6 feet. - Forecast...The river is expected to rise above flood stage late this evening to a crest of 463.5 feet early tomorrow afternoon. It will then fall below flood stage Monday afternoon. - Flood stage is 463.0 feet. - http://www.weather.gov/safety/flood

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Sunday morning.

Flood Warning issued April 18 at 12:41PM CDT until April 21 at 7:00AM CDT by NWS Chicago IL

Effective: Sat April 18, 2026, 12:41 PM
Expires: Sun April 19, 2026, 6:45 AM

...The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Fox River at Dayton affecting La Salle County. For the Fox River (Illinois)...including Dayton...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Fox River from Millington downstream to confluence with the Illinois River, including the Dayton gauge. * WHEN...Until Tuesday morning. * IMPACTS...At 13.0 feet, Residential structures threatened along 2062nd Road in Wedron. Water overflows low-lying banks in Dayton and Ottawa. * ADDITIONAL DETAILS... - At 11:45 AM CDT Saturday the stage was 11.7 feet. - Forecast...The river is expected to rise above flood stage this afternoon to a crest of 12.8 feet tomorrow morning. It will then fall below flood stage early Tuesday morning. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Sunday morning.