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 27 at 9:38PM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 27, 2026, 9:38 PM
Expires: Tue April 28, 2026, 9:45 AM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Fort Atkinson affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock 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 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 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 9:00 PM CDT Monday was 10.7 feet. - Forecast...The river is expected to rise to a crest of 10.6 feet just after midnight tonight. - 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

Caution is urged when walking near riverbanks. 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 Tuesday morning at 945 AM CDT.

Flood Warning issued April 27 at 9:18PM CDT until April 30 at 1:00AM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 9:18 PM
Expires: Tue April 28, 2026, 3:30 PM

...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. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River from Swanson Road in Roscoe downstream to Shorewood Park in Loves Park, including the Latham Park gauge. * WHEN...Until early Thursday morning. * IMPACTS...At 9.5 feet, Low-lying areas of Sportscore One are inundated in north Rockford. * ADDITIONAL DETAILS... - At 8:30 PM CDT Monday the stage was 9.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Monday was 9.8 feet. - Forecast...The river is expected to fall below flood stage Wednesday evening and continue falling to 7.7 feet Monday, May 04. - 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 Tuesday afternoon.

Flood Warning issued April 27 at 9:18PM CDT until April 29 at 7:00PM CDT by NWS Chicago IL

Effective: Mon April 27, 2026, 9:18 PM
Expires: Tue April 28, 2026, 3:30 PM

...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. * WHAT...Minor flooding is occurring and minor flooding is forecast. * 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 8:30 PM CDT Monday the stage was 10.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Monday was 10.7 feet. - Forecast...The river is expected to fall below flood stage early Wednesday afternoon and continue falling to 8.7 feet Monday, May 04. - 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 Tuesday afternoon.

Flood Warning issued April 28 at 4:40AM CDT by NWS Milwaukee/Sullivan WI

Effective: Tue April 28, 2026, 4:40 AM
Expires: Tue April 28, 2026, 4:45 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 Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge 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 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 Tuesday the stage was 10.5 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Tuesday was 10.6 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

Caution is urged when walking near riverbanks. 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 this afternoon at 445 PM CDT.

Flood Warning issued April 28 at 10:42AM CDT by NWS Milwaukee/Sullivan WI

Effective: Tue April 28, 2026, 10:42 AM
Expires: Tue April 28, 2026, 10:45 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Afton affecting Rock and Winnebago Counties. * 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 10:00 AM CDT Tuesday the stage was 10.4 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Tuesday was 10.6 feet. - Forecast...The river is expected to rise to a crest of 10.4 feet this afternoon. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.4 feet on 03/29/1952. - 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. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1045 PM CDT.