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Green County Sheriff's Office
Monday April 20th, 2026 :: 09:38 p.m. CDT

Alert

Flood Warning until 09:00AM Tuesday

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

* IMPACTS...At 5.0 feet, Some roads become flooded about 6 miles downstream in Avon Township in Rock County. In the Avon Bottoms area of Rock County, some minor flooding develops in Sugar River Park, including the boat ramp.

* ADDITIONAL DETAILS... - At 9:00 PM CDT Monday the stage was 5.2 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Monday was 6.2 feet. - Forecast...The river is expected to fall below flood stage by early Tuesday morning. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 5.2 feet on 03/13/1972. - http://www.weather.gov/safety/flood

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

Instructions:

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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 Tuesday morning at 900 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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