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

Frost Advisory issued May 1 at 3:32AM CDT until May 2 at 8:00AM CDT by NWS Chicago IL

Effective: Fri May 1, 2026, 3:32 AM
Expires: Fri May 1, 2026, 1:45 PM

* WHAT...Temperatures as low as 31 degrees Fahrenheit will result in frost formation. * WHERE...Portions of east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From 1 AM CDT /2 AM EDT/ to 8 AM CDT /9 AM EDT/ Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

Frost Advisory issued May 1 at 10:24AM CDT until May 2 at 8:00AM CDT by NWS Chicago IL

Effective: Fri May 1, 2026, 10:24 AM
Expires: Fri May 1, 2026, 8:30 PM

* WHAT...Temperatures as low as 32 degrees Fahrenheit will result in frost formation. * WHERE...Portions of east central, north central, and northeast Illinois and northwest Indiana. * WHEN...From 1 AM CDT /2 AM EDT/ to 8 AM CDT /9 AM EDT/ Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

Flood Warning issued April 30 at 9:56PM CDT until May 6 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 9:56 PM
Expires: Fri May 1, 2026, 10:00 AM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Newville affecting Rock County. Rock River At Fort Atkinson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is extended for the following rivers in Wisconsin... Rock River At Jefferson affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until Wednesday evening. * IMPACTS...At 10.0 feet, Floodwaters affect the property of a home on South Christian Road on the east side of the river in the Afton area. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 10.2 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 10.3 feet. - Forecast...The river is expected to fall below flood stage early Wednesday afternoon and continue falling to 8.7 feet Thursday, May 07. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.1 feet on 04/05/1962. - 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 Friday morning at 1000 AM CDT.

Flood Warning issued May 1 at 4:21AM CDT until May 6 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 4:21 AM
Expires: Fri May 1, 2026, 4:30 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 Jefferson and Rock 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. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until Wednesday evening. * IMPACTS...At 10.0 feet, Floodwaters affect the property of a home on South Christian Road on the east side of the river in the Afton area. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 3:00 AM CDT Friday the stage was 10.1 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 AM CDT Friday was 10.3 feet. - Forecast...The river is expected to fall below flood stage early Wednesday afternoon and continue falling to 8.7 feet Thursday evening. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.1 feet on 06/24/1996. - 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 100 PM CDT.

Flood Warning issued May 1 at 11:09AM CDT until May 7 at 1:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 11:09 AM
Expires: Fri May 1, 2026, 11:15 PM

...The Flood Warning is extended 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. ...The Flood Warning continues for the following rivers in Wisconsin... Rock River At Newville affecting Rock County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is cancelled for the following river in Wisconsin... Rock River At Jefferson affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until early Thursday afternoon. * IMPACTS...At 10.0 feet, Floodwaters affect the property of a home on South Christian Road on the east side of the river in the Afton area. Minor erosional flood damage occurs to lowland and agricultural land adjacent to the river the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 10:00 AM CDT Friday the stage was 10.1 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Friday was 10.2 feet. - Forecast...The river is expected to rise to a crest of 10.1 feet this afternoon. It will then fall below flood stage Thursday morning. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.1 feet on 06/24/1996. - 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 1215 PM CDT.