Active Weather Alerts
River Flood Warning
Issued: 1:52 AM Apr. 18, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL EARLY TOMORROW AFTERNOON... * WHAT...Minor flooding is forecast. * WHERE...Wisconsin River at Wisconsin Dells. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 16.0 feet, There is widespread flooding to agricultural land and wooded land in the Wisconsin Dells area. * ADDITIONAL DETAILS... - At 8:00 PM CDT Friday the stage was 15.8 feet. - Bankfull stage is 13.0 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 16.0 feet tomorrow morning. It will then fall below flood stage tomorrow morning. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.0 feet on 05/10/1960. - http://www.weather.gov/safety/flood && River forecasts are available for some but not all river gaging locations. The 7 day river forecast takes into account past precipitation, soil moisture conditions, and predicted precipitation for the basin. Precipitation is for the next 24 hours in the future from April through September and for 48 hours in the future from October through March. (Stages in ft.) Bank- Latest Forecast stages - Flood full observed ...for 7 pm... Location stage stage stage/time Sat Sun Mon Tue Wisconsin Dells 16.0 13.0 15.83 8 pm 4/17 13.5 12.3 13.0 12.5 - Highest 24 hour change - observed in river stage - stage in (ft.) up to Highest stage - the last latest observed forecast in - 7 days stage next 7 days Wisconsin Dells 16.76 9 pm 4/16 -0.85 16.03 7 am 4/18 &&
Flood Advisory
Issued: 10:54 PM Apr. 17, 2026 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Portions of south central and southeast Wisconsin, including the following counties, in south central Wisconsin, Columbia and Dane. In southeast Wisconsin, Dodge, Jefferson and Washington. * WHEN...Until 900 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 554 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. - Some locations that will experience flooding include... Madison, Sun Prairie, Fitchburg, Watertown, Middleton, Beaver Dam, Waunakee, Verona, McFarland, Monona, Mount Horeb, Windsor, Lake Mills, Mayville, Columbus, Marshall, Horicon, Waterloo, Juneau and Deforest. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. &&
Flood Watch
Issued: 10:15 PM Apr. 17, 2026 – National Weather Service
...FLASH FLOOD WATCH FOR THE POTENTIAL COMPROMISE OF THE CALEDONIA-LEWISTON LEVEE ON THE WISCONSIN RIVER REMAINS IN EFFECT THROUGH SUNDAY MORNING... * 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 has resulted in very high water level on the Wisconsin River. An additional 0.50 to 1.25 inches of rain is expected, with locally higher amounts to 2.00 inches possible. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && ...FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Wisconsin, including the following counties, Columbia and Sauk. * WHEN...Through Saturday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Flash flooding caused by excessive rainfall on a saturated is possible. An additional 0.50 to 1.25 inches of rain is expected, with locally higher amounts to 2.00 inches possible. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
Flash Flood Watch
Issued: 10:15 PM Apr. 17, 2026 – National Weather Service
...FLASH FLOOD WATCH FOR THE POTENTIAL COMPROMISE OF THE CALEDONIA-LEWISTON LEVEE ON THE WISCONSIN RIVER REMAINS IN EFFECT THROUGH SUNDAY MORNING... * 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 has resulted in very high water level on the Wisconsin River. An additional 0.50 to 1.25 inches of rain is expected, with locally higher amounts to 2.00 inches possible. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && ...FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Wisconsin, including the following counties, Columbia and Sauk. * WHEN...Through Saturday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Extensive street flooding and flooding of creeks and rivers are possible. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Flash flooding caused by excessive rainfall on a saturated is possible. An additional 0.50 to 1.25 inches of rain is expected, with locally higher amounts to 2.00 inches possible. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
River Flood Warning
Issued: 9:10 PM Apr. 17, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL WEDNESDAY MORNING... * WHAT...Major flooding is occurring and major flooding is forecast. This approaches the flood of record. * WHERE...Wisconsin River at Portage. * WHEN...Until Wednesday morning. * IMPACTS...At 20.5 feet, Indian trail in Lake Delton area is flooded. Other roads that are flooded are River Oaks Road in the Town of Dekorra, River Shores Road in the Town of Lewiston, Levee Road, Wood Street, Summit St, Conant St and parts of Thunderbird Road in the Portage area. * ADDITIONAL DETAILS... - At 10:30 AM CDT Friday the stage was 20.5 feet. - Bankfull stage is 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:30 AM CDT Friday was 20.5 feet. - Forecast...The river is expected to fall below flood stage early Wednesday morning and continue falling to 15.3 feet Friday, April 24. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 20.5 feet on 09/14/1938. - http://www.weather.gov/safety/flood && River forecasts are available for some but not all river gaging locations. The 7 day river forecast takes into account past precipitation, soil moisture conditions, and predicted precipitation for the basin. Precipitation is for the next 24 hours in the future from April through September and for 48 hours in the future from October through March. (Stages in ft.) Bank- Latest Forecast stages - Flood full observed ...for 7 pm... Location stage stage stage/time Sat Sun Mon Tue Portage 17.0 12.7 20.47 10 am 4/17 19.0 17.7 17.5 17.1 - Highest 24 hour change - observed in river stage - stage in (ft.) up to Highest stage - the last latest observed forecast in - 7 days stage next 7 days Portage 20.47 10 am 4/17 0.35 20.50 1 pm 4/17 &&
River Flood Warning
Issued: 9:10 PM Apr. 17, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL EARLY WEDNESDAY MORNING... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Baraboo River near Baraboo. * WHEN...Until early Wednesday morning. * IMPACTS...At 18.0 feet, If Wisconsin River at Portage up to 17 feet also, water approaches gravel of I-39 off ramp to Cascade Mt Rd. There is widespread flooding of agricultural land. * ADDITIONAL DETAILS... - At 3:00 PM CDT Friday the stage was 16.7 feet. - Bankfull stage is 14.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Friday was 16.9 feet. - Forecast...The river is expected to rise to a crest of 17.7 feet Sunday morning. It will then fall below flood stage late Tuesday evening. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.7 feet on 03/22/1972. - http://www.weather.gov/safety/flood && River forecasts are available for some but not all river gaging locations. The 7 day river forecast takes into account past precipitation, soil moisture conditions, and predicted precipitation for the basin. Precipitation is for the next 24 hours in the future from April through September and for 48 hours in the future from October through March. (Stages in ft.) Bank- Latest Forecast stages - Flood full observed ...for 7 pm... Location stage stage stage/time Sat Sun Mon Tue Baraboo 16.0 14.0 16.69 3 pm 4/17 17.3 17.6 17.2 16.2 - Highest 24 hour change - observed in river stage - stage in (ft.) up to Highest stage - the last latest observed forecast in - 7 days stage next 7 days Baraboo 16.86 1 pm 4/17 0.15 17.70 1 pm 4/19 &&
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