Headline:
Flood Warning issued April 21 at 4:53AM CDT until April 22 at 10:00PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Immediate
Effective:
April 21, 2026 - 2:53am
Expires:
April 21, 2026 - 3:00pm
Description:
...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...
Rock River At Newville affecting Rock County.
Rock River Near Lake Koshkonong affecting Jefferson and Rock
Counties.
Rock River At Fort Atkinson affecting Jefferson County.
Rock River At Afton affecting Winnebago and Rock 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 At Princeton affecting Green Lake County.
Fox River Near Berlin affecting Green Lake County.
Crawfish River At Milford affecting Jefferson County.
Fox River Lower At Rochester affecting Racine County.
Fox River Lower At Waukesha affecting Waukesha County.
Fox River Lower Near New Munster affecting Kenosha and Lake
Counties.
Wisconsin River At Portage affecting Columbia County.
...The Flood Warning is cancelled for the following rivers in
Illinois...Wisconsin...
Sugar River At Brodhead affecting Rock, Winnebago and Green
Counties.
* WHAT...Moderate flooding is occurring and moderate flooding is
forecast. This approaches the flood of record.
* WHERE...Wisconsin River at Portage.
* WHEN...Until late tomorrow evening.
* IMPACTS...At 18.5 feet, Floodwaters affect River Shores Road about
3 miles upstream of Portage in the Town of Lewiston and River Oaks
Road about 7 miles downstream of Portage in the Town of Dekorra in
Columbia County. Water over Levee Rd and Tritz Rd. There is
widespread flooding of roads in the Blackhawk Park Area including
West Lake Road...Blackhawk Road and Wood Street. The Blackhawk
Park area is on the south side of the river about 3 miles south of
Portage.
* ADDITIONAL DETAILS...
- At 7:00 AM CDT Monday the stage was 18.7 feet.
- Bankfull stage is 12.7 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 7:00 AM CDT Monday was 18.7 feet.
- Forecast...The river is expected to fall below flood stage
tomorrow afternoon and continue falling to 15.1 feet Monday
evening.
- Flood stage is 17.0 feet.
- Flood History...This crest compares to a previous crest of
18.9 feet on 03/17/2019.
- 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.
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.
Additional information is available at www.weather.gov.
The next statement will be issued this morning at 600 AM CDT.
Area Description:
Columbia, WI
Forcast Office:
NWS Milwaukee/Sullivan WI