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 April 20 at 11:36AM CDT by NWS Chicago IL

Effective: Mon April 20, 2026, 11:36 AM
Expires: Tue April 21, 2026, 5:45 AM

...The Flood Warning is extended for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Illinois River at La Salle affecting La Salle, Bureau and Putnam Counties. Pecatonica River near Shirland affecting Winnebago County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. Fox River at Montgomery affecting Kendall and Kane Counties. Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. ...Observed flooding changed to Minor severity for the following rivers in Illinois... Rock River at Dixon affecting Lee and Ogle 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 Monday the stage was 21.3 feet. - Recent Activity...The river is currently cresting and has begun a slow fall. - Forecast...The river is expected to slowly fall the next several days. - 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 April 20 at 11:36AM CDT by NWS Chicago IL

Effective: Mon April 20, 2026, 11:36 AM
Expires: Tue April 21, 2026, 5:45 AM

...The Flood Warning is extended for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Illinois River at La Salle affecting La Salle, Bureau and Putnam Counties. Pecatonica River near Shirland affecting Winnebago County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. Fox River at Montgomery affecting Kendall and Kane Counties. Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. ...Observed flooding changed to Minor severity for the following rivers in Illinois... Rock River at Dixon affecting Lee and Ogle 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 further notice. * 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 10:00 AM CDT Monday the stage was 13.6 feet. - Recent Activity...The river stage has been relatively steady just above flood stage the last few days. - Forecast...The river is expected to remain near flood stage for the next several 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 this evening.

Flood Warning issued April 20 at 11:08AM CDT by NWS Chicago IL

Effective: Mon April 20, 2026, 11:08 AM
Expires: Tue April 21, 2026, 5:15 AM

...Forecast flooding changed from Moderate to Major severity for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, Kane and McHenry Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater, Montgomery...Major flooding is forecast. * WHAT...Moderate flooding is occurring and major 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 12.0 feet, Structures threatened along River Street, Johnson Street, and Maiden Lane in East Dundee. North Harrison Street threatened near Riverside Park in Algonquin. Washington Street threatened in Carpentersville. Water Street, Edwards Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road threatened in Elgin. Low-lying areas of Festival Park are threatened in Elgin. At 12.5 feet, Residences threatened along Edwards Avenue in East Dundee. Prairie Trail is threatened at the river in Algonquin. Parking lots threatened in downtown Carpentersville. Low-lying parking lots threatened at Judson College in Elgin. * ADDITIONAL DETAILS... - At 10:30 AM CDT Monday the stage was 11.7 feet. - Recent Activity...The river stage has been climbing slowly over the last several days. - Forecast...The river is expected to crest near 12.2 feet on Thursday. - Flood stage is 9.5 feet. - Flood History...This crest compares to a previous crest of 11.8 feet on 05/23/2020. - 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.