Headline:
Flood Warning issued May 1 at 11:09AM CDT until May 5 at 1:00PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
May 1, 2026 - 9:09am
Expires:
May 1, 2026 - 9:15pm
Description:
...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 near Lake Koshkonong.
* WHEN...Until early Tuesday afternoon.
* IMPACTS...At 10.5 feet, Floodwaters reach Oxbow Bend Road in the
area of the gage on the east side of the lake.
* ADDITIONAL DETAILS...
- At 10:00 AM CDT Friday the stage was 10.7 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Friday was 10.9 feet.
- Forecast...The river is expected to fall below flood stage
Tuesday morning and continue falling to 9.3 feet Friday, May
08.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
10.6 feet on 04/07/2007.
- 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 1215 PM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI