Headline:
Flood Warning issued April 17 at 10:08PM CDT by NWS Milwaukee/Sullivan WI
Event:
Flood Warning
Urgency:
Expected
Effective:
April 17, 2026 - 8:08pm
Expires:
April 18, 2026 - 8:15am
Description:
...The National Weather Service in Milwaukee/Sullivan WI has issued
a Flood Warning for the following rivers in Wisconsin...
Rock River Near Lake Koshkonong affecting Rock and Jefferson
Counties.
* WHAT...Major flooding is forecast.
* WHERE...Rock River near Lake Koshkonong.
* WHEN...From Saturday morning 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 9:00 PM CDT Friday the stage was 9.7 feet.
- Bankfull stage is 9.0 feet.
- Forecast...The river is expected to rise above flood stage
tomorrow morning and continue rising to 12.1 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.
Additional information is available at www.weather.gov.
The next statement will be issued Saturday morning at 1015 AM CDT.
Area Description:
Jefferson, WI; Rock, WI
Forcast Office:
NWS Milwaukee/Sullivan WI