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Green County Sheriff's Office
Sunday April 19th, 2026 :: 10:10 p.m. CDT

Alert

Flood Warning until 11:00PM Monday

...The Flood Warning is extended for the following rivers in Illinois...Wisconsin... Sugar River At Brodhead affecting Winnebago, Rock and Green Counties. ...The Flood Warning continues 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 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. Crawfish River At Milford affecting Jefferson County.

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Sugar River at Brodhead.

* WHEN...Until late tomorrow evening.

* IMPACTS...At 6.0 feet, Some roads are flooded about 6 miles downstream in Avon Township of Rock County, including Beloit Newark Rd. In the Avon Bottoms area of Rock County, flooding is occurring in Sugar River Park. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.

* ADDITIONAL DETAILS... - At 9:00 PM CDT Sunday the stage was 6.2 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Sunday was 7.0 feet. - Forecast...The river is expected to fall below flood stage tomorrow afternoon. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 6.2 feet on 03/12/1936. - http://www.weather.gov/safety/flood

* AFFECTED AREAS: WINNEBAGO, IL ... GREEN, WI ... ROCK, WI

Instructions:

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. Additional information is available at www.weather.gov. The next statement will be issued Monday morning at 1015 AM CDT.

Address/Location
Green County Sheriff's Office
2827 6th St
Monroe, WI 53566

Contact
Emergency: 9-1-1
Non-emergencies: 608-328-9400

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Alert Details

Severity:
Severe - Significant threat to life or property
Urgency:
Immediate - Responsive action SHOULD be taken immediately
Certainty:
Observed - Determined to have occurred or to be ongoing
Category:
Meteorological (inc. flood)
Event:
Flood Warning

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