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 26 at 9:27PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 9:27 PM
Expires: Mon April 27, 2026, 9:30 AM

...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Jefferson affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Fox River Near Berlin affecting Green Lake County. Rock River At Newville affecting Rock County. Rock River At Afton affecting Winnebago and Rock Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Crawfish River At Milford affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 10.5 feet, Floodwaters affect 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 Sunday the stage was 10.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Sunday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.7 feet just after midnight tonight. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.7 feet on 06/02/2000. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued Monday morning at 930 AM CDT.

Flood Warning issued April 26 at 8:17PM CDT until April 30 at 7:00PM CDT by NWS Chicago IL

Effective: Sun April 26, 2026, 8:17 PM
Expires: Mon April 27, 2026, 2:30 PM

...The Flood Warning is extended for the following rivers in Illinois... Rock River at Latham Park affecting Winnebago County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Rockton affecting Winnebago County. * 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 Thursday evening. * IMPACTS...At 10.0 feet, property and trails near the boat ramp at Bauer Parkway are threatened. Illinois DNR considers closure of the Rock River. * ADDITIONAL DETAILS... - At 7:30 PM CDT Sunday, the stage was 9.8 feet. - Forecast...The river will continue to gradually fall over the next several days but will likely remain above flood stage through the middle of the 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 Monday afternoon.

Flood Warning issued April 26 at 8:17PM CDT until April 29 at 7:00PM CDT by NWS Chicago IL

Effective: Sun April 26, 2026, 8:17 PM
Expires: Mon April 27, 2026, 2:30 PM

...The Flood Warning is extended for the following rivers in Illinois... Rock River at Latham Park affecting Winnebago County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Rockton affecting Winnebago County. * WHAT...Minor 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 Wednesday evening. * IMPACTS...At 10.5 feet, Edgemere Terrace threatened near Roscoe. * ADDITIONAL DETAILS... - At 7:30 PM CDT Sunday, the stage was 10.7 feet. - Forecast...The river will continue to gradually fall over the next several days but will likely remain above flood stage through the first half of this 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 Monday afternoon.

Flood Warning issued April 27 at 5:12AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 27, 2026, 5:12 AM
Expires: Mon April 27, 2026, 5:15 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. 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 10.5 feet, Floodwaters affect 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 4:00 AM CDT Monday the stage was 10.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Monday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.6 feet this morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 04/12/1923. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 515 PM CDT.

Flood Warning issued April 26 at 9:27PM CDT until May 3 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 9:27 PM
Expires: Mon April 27, 2026, 9:30 AM

...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Jefferson affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Fox River Near Berlin affecting Green Lake County. Rock River At Newville affecting Rock County. Rock River At Afton affecting Winnebago and Rock Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Crawfish River At Milford affecting Jefferson County. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until Sunday, May 03. * IMPACTS...At 11.3 feet, There is knee-deep water over Blackhawk Island Road. Lamp Road on west side of river also becomes flooded. Lake Koshkonong merges with Mud Lake to the east of Lake Koshkonong. * ADDITIONAL DETAILS... - At 9:00 PM CDT Sunday the stage was 11.3 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Sunday was 11.3 feet. - Forecast...The river is expected to fall below flood stage Sunday, May 03 and continue falling to 9.9 feet Sunday, May 03. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 11.2 feet on 07/31/2010. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued Monday morning at 930 AM CDT.