Headline:
Flood Warning issued April 28 at 4:40AM CDT until May 4 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 28, 2026 - 2:40am
Expires:
April 28, 2026 - 2:45pm
Description:
...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 near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County.
Fox River Lower Near New Munster affecting Kenosha and Lake
Counties.
* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.
* WHERE...Rock River near Lake Koshkonong.
* WHEN...Until early Monday morning.
* IMPACTS...At 11.0 feet, In the Town of Lake Koshkonong,
floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow
Bend Road. There is widespread flooding of roads and docks in the
Town of Koshkonong and Town of Sumner including Vets Lane,
Blackhawk Island Road and Oxbow Bend Road.
* ADDITIONAL DETAILS...
- At 4:00 AM CDT Tuesday the stage was 11.2 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:00 AM CDT Tuesday was 11.2 feet.
- Forecast...The river is expected to fall below flood stage
Sunday evening and continue falling to 9.7 feet Monday
evening.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
11.2 feet on 07/31/2010.
- http://www.weather.gov/safety/flood
Instruction:
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 445 PM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI