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 Watch issued April 19 at 11:19AM CDT until April 21 at 7:00AM CDT by NWS Chicago IL

Effective: Sun April 19, 2026, 11:19 AM
Expires: Mon April 20, 2026, 5:30 AM

...The Flood Watch continues for the following rivers in Illinois... Rock River at Dixon affecting Lee and Ogle Counties. * WHAT...Flooding is possible. * WHERE...Rock River from Castle Rock State Park near Oregon downstream to Lee County line, including the Dixon gauge. * WHEN...From Monday morning to Tuesday morning. * IMPACTS...At 16.0 feet, N Canal Drive threatened in Woodland Shores. Water overflows low-lying banks along west First Street in Dixon. Residential property threatened near Sherman Avenue and River Street in Dixon. * ADDITIONAL DETAILS... - At 10:15 AM CDT Sunday, the stage was 15.4 feet. - Forecast...Flood stage may be reached tomorrow morning. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood

A Flood Watch means water levels above flood stage are possible, but not yet certain, based upon the latest forecasts. Persons along rivers and streams in the watch area should monitor the latest forecasts and be prepared to take action should flooding develop. 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 19 at 11:10AM CDT by NWS Chicago IL

Effective: Sun April 19, 2026, 11:10 AM
Expires: Mon April 20, 2026, 5:15 AM

...The Flood Warning continues for the following rivers in Illinois... 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 forecasted to occur. * WHERE...Rock River from confluence with Kishwaukee River to Castle Rock State Park near Oregon, including the Byron gauge. * WHEN...Until further notice. * IMPACTS...At 15.5 feet, water threatens lower sections of the water treatment plant property in Byron. Water threatens IL-2 west of Byron. * ADDITIONAL DETAILS... - At 10:15 AM CDT Sunday, the stage was 15.0 feet. - Forecast...The river is expected to rise to a crest of 15.2 feet this evening. It is then expected to slowly fall through next week. - Flood stage is 13.0 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.

Freeze Warning issued April 19 at 8:44AM CDT until April 20 at 9:00AM CDT by NWS Chicago IL

Effective: Sun April 19, 2026, 8:44 AM
Expires: Sun April 19, 2026, 7:00 PM

* WHAT...Sub-freezing temperatures as low as 27 expected, with the coldest conditions across interior northern Illinois. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Monday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.

Freeze Warning issued April 19 at 2:40PM CDT until April 20 at 9:00AM CDT by NWS Chicago IL

Effective: Sun April 19, 2026, 2:40 PM
Expires: Mon April 20, 2026, 1:00 AM

* WHAT...Sub-freezing temperatures as low as 27 expected, with the coldest conditions across interior northern Illinois. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Monday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.

Flood Warning issued April 19 at 5:01AM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 5:01 AM
Expires: Sun April 19, 2026, 5:15 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Milwaukee River Near Cedarburg affecting Ozaukee 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. Baraboo River Near Baraboo affecting Columbia and Sauk 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. Pecatonica River At Martintown affecting Green County. Root River Canal At Raymond affecting Racine County. Sugar River At Brodhead affecting Winnebago, Green and Rock Counties. Wisconsin River At Portage affecting Columbia County. ...The Flood Warning is cancelled for the following rivers in Wisconsin... Root River At Franklin affecting Milwaukee County. * WHAT...Minor flooding is occurring and major flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 12.2 feet, There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets adjacent to the river are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed as is a portion of Riverside Drive. Traxler Park off of Memorial Drive in Janesville is flooded and closed. * ADDITIONAL DETAILS... - At 3:00 AM 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 3:00 AM CDT Sunday was 11.7 feet. - Forecast...The river is expected to rise to 12.2 feet early Saturday afternoon. Additional rises are possible thereafter. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 12.2 feet on 01/23/2008. - 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. Additional information is available at www.weather.gov. The next statement will be issued this morning at 615 AM CDT.