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 Warning issued June 21 at 11:18AM CDT by NWS Chicago IL

Effective: Sun June 21, 2026, 11:18 AM
Expires: Sun June 21, 2026, 11:15 PM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at La Salle affecting Putnam, La Salle and Bureau Counties. * 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...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 10:45 AM CDT Sunday the stage was 20.8 feet. - Forecast...The river is expected to rise to a crest of 22.6 feet early Wednesday morning. It will then gradually fall through the end of the week. - 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 this evening.

Flood Warning issued June 21 at 9:29PM CDT until June 28 at 1:00AM CDT by NWS Chicago IL

Effective: Sun June 21, 2026, 9:29 PM
Expires: Mon June 22, 2026, 3:30 PM

...The Flood Warning continues for the following rivers in Illinois... Illinois River at La Salle affecting La Salle, Bureau and Putnam Counties. For the Illinois River (Upper)...including La Salle...Minor flooding is forecast. * 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...Until Sunday, June 28. * 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 Sunday the stage was 20.9 feet. - Forecast...The river is expected to rise to a crest of 23.2 feet early Wednesday morning. It will then fall below flood stage Saturday evening. - 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 Monday afternoon.

Flood Warning issued June 21 at 11:14AM CDT until June 27 at 7:00AM CDT by NWS Lincoln IL

Effective: Sun June 21, 2026, 11:14 AM
Expires: Mon June 22, 2026, 3:15 AM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Henry affecting Putnam and Marshall Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Peoria affecting Tazewell, Woodford and Peoria Counties. Illinois River at Beardstown affecting Schuyler, Morgan, Cass and Brown Counties. Illinois River near Havana affecting Mason, Fulton and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at Henry. * WHEN...Until Saturday morning. * IMPACTS...At 23.0 feet, Water begins to affect the marina in Henry along with minor flooding of land adjacent to the river. * ADDITIONAL DETAILS... - At 10:45 AM CDT Sunday the stage was 22.9 feet. - Forecast...The river is expected to rise to a crest of 23.4 feet Thursday morning. It will then fall below flood stage early Saturday morning. - Flood stage is 23.0 feet. - http://www.weather.gov/safety/flood

Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.

Flood Warning issued June 21 at 9:14PM CDT until June 28 at 1:00AM CDT by NWS Lincoln IL

Effective: Sun June 21, 2026, 9:14 PM
Expires: Mon June 22, 2026, 1:15 PM

...The Flood Warning is extended for the following rivers in Illinois... Illinois River at Henry affecting Putnam and Marshall Counties. ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Peoria affecting Tazewell, Peoria and Woodford Counties. Illinois River at Beardstown affecting Schuyler, Cass, Morgan and Brown Counties. Illinois River near Havana affecting Mason, Cass and Fulton Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at Henry. * WHEN...Until Sunday, June 28. * IMPACTS...At 23.0 feet, Water begins to affect the marina in Henry along with minor flooding of land adjacent to the river. * ADDITIONAL DETAILS... - At 8:45 PM CDT Sunday the stage was 22.9 feet. - Forecast...The river is expected to rise above flood stage tomorrow evening to a crest of 23.7 feet early Thursday morning. It will then fall below flood stage Saturday evening. - Flood stage is 23.0 feet. - http://www.weather.gov/safety/flood

Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.

Beach Hazards Statement issued June 21 at 2:53PM CDT until June 23 at 4:00AM CDT by NWS Chicago IL

Effective: Sun June 21, 2026, 2:53 PM
Expires: Sun June 21, 2026, 11:00 PM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 7 ft expected. * WHERE...In Illinois, Central Cook County. In Indiana, Lake and Porter Counties. * WHEN...From 7 PM CDT this evening through late Monday night. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.