Station Name: ROCK RIVER AT BYRON, IL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 679 feet

Nearest Address:
State Rte 72
Byron, IL 61010
Ogle County

GPS Coordinates: 42.12218889, -89.2553639

Nearby Water Temperatures

Flood Warning issued April 24 at 11:00AM CDT until April 26 at 7:00PM CDT by NWS Chicago IL

Effective: Fri April 24, 2026, 11:00 AM
Expires: Sat April 25, 2026, 5:00 AM

...The Flood Warning continues for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. For the Pecatonica River (Lower)...including Shirland...Minor flooding is forecast. * WHAT...Minor flooding is occurring and is forecasted to continue. * WHERE...Pecatonica River from Winnebago County line downstream to confluence with the Rock River, including the Shirland gauge. * WHEN...Until Sunday evening. * IMPACTS...At 12.0 feet, Low-lying sections of the Winnebago County Fairgrounds are inundated. Low-lying sections of Rivers Edge Campground are inundated east of Shirland. * ADDITIONAL DETAILS... - At 10:00 AM CDT Friday the stage was 12.9 feet. - Forecast...The river is expected to gradually fall to below flood stage sometime this weekend or early next week. - 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 late tonight.

Flood Warning issued April 24 at 10:58AM CDT until May 1 at 1:00AM CDT by NWS Chicago IL

Effective: Fri April 24, 2026, 10:58 AM
Expires: Sat April 25, 2026, 5:00 AM

...The Flood Warning continues for the following rivers in Illinois... Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. For the Rock River...including Rockton, Latham Park, Rockford (Auburn Street), Byron, Dixon...Moderate flooding is forecast. * WHAT...Minor flooding is occurring and is forecasted to continue. * WHERE...Rock River from Swanson Road in Roscoe downstream to Shorewood Park in Loves Park, including the Latham Park gauge. * WHEN...Until Friday, May 01. * IMPACTS...At 10.5 feet, Low-lying sections of Shore Drive are threatened between Wilson Avenue and Park Road in Machesney Park. Water overflows low-lying river banks along East Drive in Loves Park. Low-lying areas of Martin Memorial Park are inundated. * ADDITIONAL DETAILS... - At 10:30 AM CDT Friday the stage was 10.7 feet. - Forecast...The river is expected to only gradually fall through next week and will likely remain above flood stage through the middle of next week. - Flood stage is 9.0 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 24 at 10:58AM CDT until April 30 at 7:00AM CDT by NWS Chicago IL

Effective: Fri April 24, 2026, 10:58 AM
Expires: Sat April 25, 2026, 5:00 AM

...The Flood Warning continues for the following rivers in Illinois... Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. For the Rock River...including Rockton, Latham Park, Rockford (Auburn Street), Byron, Dixon...Moderate flooding is forecast. * WHAT...Moderate flooding is occurring and is forecasted to continue. * WHERE...Rock River from Prairie Hill Road downstream to Swanson Road in Roscoe, including the Rockton gauge. * WHEN...Until Thursday morning. * IMPACTS...At 12.0 feet, multiple low-lying roads threatened along the river in Roscoe. * ADDITIONAL DETAILS... - At 10:30 AM CDT Friday the stage was 11.4 feet. - Forecast...The river is expected to only gradually fall through the weekend. It may fall into Minor flood stage by early next week. - Flood stage is 10.0 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 24 at 3:54PM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri April 24, 2026, 3:54 PM
Expires: Sat April 25, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. Rock River At Watertown affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River At Princeton affecting Green Lake County. Fox River Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 11.1 feet, Floodwaters affect Riverside Park and a road in Riverside park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 3:00 PM CDT Friday the stage was 10.7 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Friday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.8 feet this evening. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.8 feet on 08/26/1940. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued late tonight at 400 AM CDT.

Flood Warning issued April 24 at 9:32PM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri April 24, 2026, 9:32 PM
Expires: Sat April 25, 2026, 9:45 AM

...The Flood Warning is extended for the following rivers in Wisconsin... Rock River At Fort Atkinson affecting Jefferson County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Watertown affecting Jefferson County. Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 11.1 feet, Floodwaters affect Riverside Park and a road in Riverside park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Friday the stage was 10.7 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Friday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.8 feet just after midnight tonight. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.8 feet on 08/26/1940. - http://www.weather.gov/safety/flood

Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued Saturday morning at 945 AM CDT.