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

Hydrologic Outlook issued April 14 at 12:33PM CDT by NWS Chicago IL

Effective: Tue April 14, 2026, 12:33 PM
Expires: Wed April 15, 2026, 12:00 PM

ESFLOT Waves of showers and thunderstorms are expected this evening through the end of the week. Urban and river flooding will be possible. Atmospheric conditions are favorable for some thunderstorms to have rainfall rates in excess of 1 to 2 inches per hour tonight and tomorrow. In addition, some rivers and streams remain elevated from recent rainfall and soil moisture is elevated across most of northern Illinois and northwestern Indiana. In urban and poor drainage areas isolated flooding of roadways, creeks, and streams may occur with areas of heaviest rainfall. Widespread rainfall may also lead to river rises and possible flooding, in particular along already elevated rivers such as the Fox, Des Plaines, and Kankakee. Additional chances for rainfall are expected to continue through the remainder of the week. This outlook means that elevated water levels and potential impacts are possible, but not yet certain. Persons should closely monitor forecasts including the possibility of flood watches, warnings, and advisories. This product will be updated by tomorrow morning.

Flood Watch issued April 15 at 5:15AM CDT until April 16 at 1:00AM CDT by NWS Chicago IL

Effective: Wed April 15, 2026, 5:15 AM
Expires: Wed April 15, 2026, 3:00 PM

* WHAT...Flash flooding caused by excessive rainfall remains possible. * WHERE...Portions of Illinois, including the following counties, Grundy, Kankakee, La Salle, Lee and Livingston and northwest Indiana, including the following counties, Jasper, Newton and Porter. * WHEN...Through late tonight. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Multiple rounds of showers and thunderstorms are expected through this evening. Elevated soil moisture due to recent rainfall is expected to increase the susceptibility to flash flooding. - http://www.weather.gov/safety/flood

A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop.

Flood Watch issued April 14 at 10:37PM CDT by NWS Chicago IL

Effective: Tue April 14, 2026, 10:37 PM
Expires: Wed April 15, 2026, 4:45 PM

...The National Weather Service in Chicago IL has issued a Flood Watch for the following rivers in Illinois... Illinois River at La Salle affecting Putnam, La Salle and Bureau zones. For the Illinois River (Upper)...including 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 Wednesday morning until further notice. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 9:45 PM CDT Tuesday the stage was 18.5 feet. - Forecast...Rainfall will cause the river to rise and flood stage may be reached by Thursday. - 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 Wednesday afternoon.

Flood Watch issued April 15 at 10:54AM CDT by NWS Chicago IL

Effective: Wed April 15, 2026, 10:54 AM
Expires: Thu April 16, 2026, 5:00 AM

...The Flood Watch continues for the following rivers in Illinois... Illinois River at La Salle affecting Putnam, La Salle and Bureau zones. For the Illinois River (Upper)...including 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...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 9:45 AM CDT Wednesday the stage was 18.6 feet. - Forecast...Flood stage may be reached early Friday morning. - 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 late tonight.

Flood Watch issued April 15 at 10:43AM CDT until April 18 at 1:00PM CDT by NWS Chicago IL

Effective: Wed April 15, 2026, 10:43 AM
Expires: Thu April 16, 2026, 4:45 AM

...The National Weather Service in Chicago IL has issued a Flood Watch for the following rivers in Illinois... Fox River at Dayton affecting La Salle zone. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater, Montgomery, Dayton...flooding is possible. * WHAT...Flooding is possible. * WHERE...Fox River from Millington downstream to confluence with the Illinois River, including the Dayton gauge. * WHEN...From Thursday evening to early Saturday afternoon. * IMPACTS...At 12.5 feet, 2062nd Road threatened in Wedron. Low-lying agricultural land inundated near Wedron. * ADDITIONAL DETAILS... - At 9:45 AM CDT Wednesday the stage was 9.2 feet. - Forecast...Flood stage may be reached late tomorrow evening. - Flood stage is 12.0 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 late tonight.