Headline:
Flood Warning issued April 30 at 9:56PM CDT until May 1 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 30, 2026 - 7:56pm
Expires:
May 1, 2026 - 8:00am
Description:
...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 Jefferson.
* WHEN...Until early tomorrow afternoon.
* IMPACTS...At 10.0 feet, Water affects low lying areas of
residential property in the City of Jefferson. Rock River Park and
boat launch is affected near Hwy B in Johnson Creek.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Thursday the stage was 10.1 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
tomorrow morning and continue falling to 7.6 feet Thursday,
May 07.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
10.3 feet on 04/05/2007.
- http://www.weather.gov/safety/flood
Instruction:
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.
Area Description:
Jefferson, WI
Forcast Office:
NWS Milwaukee/Sullivan WI