Headline:
Flood Warning issued April 29 at 9:14PM CDT until May 5 at 7:00AM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 29, 2026 - 7:14pm
Expires:
April 30, 2026 - 7:15am
Description:
...The Flood Warning continues for the following rivers in
Wisconsin...
Rock River Near Lake Koshkonong affecting Rock and Jefferson
Counties.
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Rock River near Lake Koshkonong.
* WHEN...Until Tuesday 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 8:00 PM CDT Wednesday the stage was 10.9 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 8:00 PM CDT Wednesday was 11.1 feet.
- Forecast...The river is expected to fall below flood stage
early Tuesday morning and continue falling to 9.6 feet
Wednesday, May 06.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
11.0 feet on 10/15/2019.
- 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 Thursday morning at 915 AM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI