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 22 at 9:55AM CDT until April 24 at 7:00AM CDT by NWS Chicago IL

Effective: Wed April 22, 2026, 9:55 AM
Expires: Thu April 23, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. Rock River at Byron affecting Ogle County. 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 Confluence with Kishwaukee River to Castle Rock State Park near Oregon, including the Byron gauge. * WHEN...Until Friday morning. * IMPACTS...At 13.5 feet, Numerous low-lying structures downstream of Byron are flooded. * ADDITIONAL DETAILS... - At 9:15 AM CDT Wednesday the stage was 13.3 feet. - Forecast...The river is expected to continue a gradual fall to below flood stage by Friday morning. - Flood stage is 13.0 feet. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.

Flood Warning issued April 22 at 5:19AM CDT by NWS Milwaukee/Sullivan WI

Effective: Wed April 22, 2026, 5:19 AM
Expires: Wed April 22, 2026, 5:30 PM

...The Flood Warning is extended for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. ...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 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 At Rochester affecting Racine County. Fox River Lower Near New Munster affecting Lake and Kenosha 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 2:00 AM CDT Wednesday the stage was 10.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 2:00 AM CDT Wednesday was 10.6 feet. - Forecast...The river is expected to remain steady above flood stage at 10.7 feet. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. 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. 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 this morning at 1000 AM CDT.

Flood Warning issued April 22 at 10:03AM CDT by NWS Milwaukee/Sullivan WI

Effective: Wed April 22, 2026, 10:03 AM
Expires: Wed April 22, 2026, 10:15 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Crawfish River At Milford affecting Jefferson County. Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock 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 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. Fox River Lower At Rochester affecting Racine County. ...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Fox River Lower Near New Munster affecting Lake and Kenosha 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 8:00 AM CDT Wednesday the stage was 10.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 AM CDT Wednesday was 10.6 feet. - Forecast...The river is expected to rise to a crest of 10.9 feet Friday morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 11.0 feet on 06/01/2004. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1015 PM CDT.

Flood Warning issued April 22 at 9:55AM CDT by NWS Chicago IL

Effective: Wed April 22, 2026, 9:55 AM
Expires: Thu April 23, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. Rock River at Byron affecting Ogle County. 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...Pecatonica River from Winnebago County line downstream to confluence with the Rock River, including the Shirland gauge. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Structures threatened at Rivers Edge Campground east of Shirland. * ADDITIONAL DETAILS... - At 9:00 AM CDT Wednesday the stage was 13.7 feet. - Forecast...The river is expected to gradually fall to below flood stage late by early next week. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.

Flood Warning issued April 22 at 9:55AM CDT by NWS Chicago IL

Effective: Wed April 22, 2026, 9:55 AM
Expires: Thu April 23, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. Rock River at Byron affecting Ogle County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Moderate flooding is occurring and moderate 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 further notice. * IMPACTS...At 11.0 feet, Low-lying sections of Harbor Oaks Drive are threatened in north Machesney Park. Low-lying residences are threatened along Queen Oaks Drive in Machesney Park. Browns Beach Road is threatened in north Rockford. Lower parking lot of Sportscore One is inundated in north Rockford. * ADDITIONAL DETAILS... - At 9:30 AM CDT Wednesday the stage was 11.3 feet. - Forecast...The river is expected to only gradually fall through the weekend. It may fall into Minor flood stage by Friday morning. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood

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. 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. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.