Station Name: Seneca
Data Source: USGS

Elevation Above Sea Level: 499 feet

Nearest Address:
Harbor Lane
Seneca, IL 61360
La Salle County

GPS Coordinates: 41.2997, -88.6142

Nearby Water Temperatures

Flood Watch issued April 27 at 12:20PM CDT until May 2 at 7:00PM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 12:20 PM
Expires: Tue April 28, 2026, 6:30 AM

...The Flood Watch is extended for the following rivers in Illinois... Illinois River at La Salle affecting La Salle, Bureau and Putnam zones. For the Illinois River (Upper)...including Morris, Ottawa, La Salle...flooding is possible. * WHAT...Flooding is possible. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...From Tuesday afternoon to Saturday evening. * 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 11:45 AM CDT Monday the stage was 18.9 feet. - Forecast...Flood stage may be reached by late tomorrow based upon forecasted rainfall today and tonight. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood

A Flood Watch means water levels above flood stage are possible, but not yet certain, based upon the latest forecasts. Persons along rivers and streams in the watch area should monitor the latest forecasts and be prepared to take action should flooding develop. 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 Tuesday morning.

Flood Watch issued April 27 at 9:43PM CDT until May 2 at 3:00AM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 9:43 PM
Expires: Tue April 28, 2026, 3:45 PM

...The Flood Watch continues for the following rivers in Illinois... Illinois River at La Salle affecting Bureau, Putnam and La Salle zones. * WHAT...Flooding is possible. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...From Tuesday evening to early Saturday morning. * 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 8:45 PM CDT Monday the stage was 18.8 feet. - Forecast...Flood stage may be reached by late tomorrow based upon forecasted rainfall today and tonight. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood

A Flood Watch means water levels above flood stage are possible, but not yet certain, based upon the latest forecasts. Persons along rivers and streams in the watch area should monitor the latest forecasts and be prepared to take action should flooding develop. 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 Tuesday afternoon.

Flood Warning issued April 27 at 12:10PM CDT until April 29 at 7:00PM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 12:10 PM
Expires: Tue April 28, 2026, 6:15 AM

...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Lake IL and Kane Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until Wednesday evening. * IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. * ADDITIONAL DETAILS... - At 11:00 AM CDT Monday the stage was 13.4 feet. - Recent Activity...River stages have been very slowly falling over the last few days. - Forecast...The river may rise slightly overnight tonight due to forecasted rainfall. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued by Tuesday morning.

Flood Warning issued April 27 at 8:44PM CDT until April 29 at 7:00PM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 8:44 PM
Expires: Tue April 28, 2026, 2:45 PM

...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, Kane and McHenry Counties. * WHAT...Minor flooding is forecast. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until Wednesday evening. * IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. * ADDITIONAL DETAILS... - At 8:00 PM CDT Monday the stage was 13.5 feet. - Forecast...The river is expected to remain relatively steady near flood stage for the next few days. - Flood stage is 13.5 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 Tuesday afternoon.

Flood Warning issued April 27 at 12:10PM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 12:10 PM
Expires: Tue April 28, 2026, 6:15 AM

...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting McHenry, Lake IL and Kane Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge. * WHEN...Until further notice. * IMPACTS...At 11.5 feet, Residences threatened along Oceola Drive in Algonquin. A few residences threatened along McBridge Street in Elgin. Jayne Street and Beach Drive threatened in Algonquin. River Street threatened in East Dundee. Jerusha Avenue threatened in Elgin. Fox River Trail threatened between East Dundee and Elgin. * ADDITIONAL DETAILS... - At 11:30 AM CDT Monday the stage was 11.7 feet. - Recent Activity...The river has been falling slowly over the last few days. - Forecast...The rate of fall may slow over the next few days due to forecasted rainfall. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued by Tuesday morning.