Headline:
Flash Flood Watch issued April 18 at 10:08PM CDT until April 19 at 7:00AM CDT by NWS Milwaukee/Sullivan WI
Event:
Flash Flood Watch
Urgency:
Future
Effective:
April 18, 2026 - 8:08pm
Expires:
April 19, 2026 - 4:15am
Description:
* WHAT...Flash flooding due to the potential compromise of the
Caledonia-Lewiston Levee. The Wisconsin Department of Natural
Resources has indicated that the Calendonia-Lewiston Levee along
the Wisconsin River may become compromised as the river levels
rise. If this takes place, a rapid inundation of water is expected
along the south and west side of the river. The City of Portage is
not anticipated to be impacted by a potential compromise of the
Caledonia-Lewiston Levee.
* WHERE...A portion of south central Wisconsin, including the
following counties, Columbia and Sauk along the south and west
side of the Wisconsin River. Areas affected include, but are not
limited to the Pine Island State Wildlife Area and portions of
Highway 33. The City of Portage is not anticipated to be impacted
by a potential compromise of the Caledonia-Lewiston Levee.
* WHEN...Through Sunday morning.
* IMPACTS...A compromised levee may result in flash flooding of
low-lying areas along the Caledonia-Lewiston Levee.
* ADDITIONAL DETAILS...
- Excessive rainfall over the past several days has resulted in
very high water level on the Wisconsin River.
- http://www.weather.gov/safety/flood
Instruction:
PLAN NOW so you will know what to do in an emergency. Keep informed
by listening to local radio and television for statements and
possible warnings. Follow the advice of public safety officials.
Area Description:
Sauk; Columbia
Forcast Office:
NWS Milwaukee/Sullivan WI