Headline:
Flood Warning issued April 18 at 3:56PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 18, 2026 - 1:56pm
Expires:
April 19, 2026 - 2:00am
Description:
...The Flood Warning is extended for the following rivers in
Wisconsin...
Milwaukee River Near Cedarburg affecting Ozaukee County.
Root River At Racine affecting Racine County.
Root River Canal At Raymond affecting Racine County.
...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...
Sheboygan River At Sheboygan affecting Sheboygan 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.
Baraboo River Near Baraboo affecting Columbia and Sauk Counties.
Rock River At Jefferson affecting Jefferson County.
Rock River At Watertown affecting Jefferson County.
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 At Waukesha affecting Waukesha County.
Fox River Lower Near New Munster affecting Kenosha and Lake
Counties.
Pecatonica River At Martintown affecting Green County.
Root River At Franklin affecting Milwaukee County.
Sugar River At Brodhead affecting Rock, Winnebago and Green
Counties.
Turtle Creek Near Clinton affecting Rock and Winnebago Counties.
Wisconsin River At Portage affecting Columbia County.
* WHAT...Minor flooding is occurring and major flooding is forecast.
* WHERE...Rock River near Lake Koshkonong.
* WHEN...Until further notice.
* 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 3:00 PM CDT Saturday the stage was 10.1 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 3:00 PM CDT Saturday was 10.1 feet.
- Forecast...The river is expected to rise to 12.2 feet
Thursday morning. Additional rises are possible thereafter.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
12.2 feet on 04/25/1993.
- http://www.weather.gov/safety/flood
Instruction:
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Even 6 inches of fast-moving flood water can knock you off your feet
and a depth of 2 feet will float your car. Never try to walk, swim,
or drive through such swift water. If you come upon flood waters,
stop, turn around and go another way.
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 evening at 1145 PM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI