Headline:
Flood Warning issued April 25 at 9:27PM CDT until May 2 at 7:00PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 25, 2026 - 7:27pm
Expires:
April 26, 2026 - 7:30am
Description:
...The Flood Warning is extended for the following rivers in
Wisconsin...
Rock River Near Lake Koshkonong affecting Rock and Jefferson
Counties.
Rock River At Fort Atkinson affecting Jefferson County.
Rock River At Jefferson affecting Jefferson County.
...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...
Rock River At Newville affecting Rock County.
Rock River At Afton affecting Rock and Winnebago Counties.
ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County.
Fox River Near Berlin affecting Green Lake County.
Crawfish River At Milford affecting Jefferson 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 Saturday, May 02.
* IMPACTS...At 11.3 feet, There is knee-deep water over Blackhawk
Island Road. Lamp Road on west side of river also becomes flooded.
Lake Koshkonong merges with Mud Lake to the east of Lake
Koshkonong.
* ADDITIONAL DETAILS...
- At 9:00 PM CDT Saturday the stage was 11.3 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:00 PM CDT Saturday was 11.4 feet.
- Forecast...The river is expected to rise to a crest of 11.4
feet just after midnight tonight. It will then fall below
flood stage Saturday, May 02.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
11.4 feet on 03/29/2009.
- http://www.weather.gov/safety/flood
Instruction:
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Caution is urged when walking near riverbanks.
Additional information is available at www.weather.gov.
The next statement will be issued Sunday morning at 930 AM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI