Station Name: LAKE MONONA AT MADISON, WI
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 840 feet

Nearest Address:
795 W Washington Ave
Madison, WI 53715
Dane County

GPS Coordinates: 43.0633297, -89.3970636

Nearby Water Temperatures

Flood Warning issued April 6 at 5:16AM CDT until April 10 at 10:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 6, 2026, 5:16 AM
Expires: Mon April 6, 2026, 5:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Baraboo River At Reedsburg affecting Sauk County. Baraboo River At Rock Springs affecting Sauk County. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Moderate flooding is forecast. * WHERE...Wisconsin River at Portage. * WHEN...From this morning to late Friday morning. * 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 11:00 AM CDT Sunday the stage was 15.3 feet. - Bankfull stage is 12.7 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 18.3 feet early Wednesday morning. It will then fall below flood stage early Friday morning. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 18.3 feet on 05/22/2017. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 530 PM CDT.

Flood Warning issued April 6 at 5:16AM CDT until April 9 at 3:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 6, 2026, 5:16 AM
Expires: Mon April 6, 2026, 5:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Baraboo River At Reedsburg affecting Sauk County. Baraboo River At Rock Springs affecting Sauk County. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is forecast. * WHERE...Baraboo River near Baraboo. * WHEN...From Tuesday morning to Thursday afternoon. * 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 4:00 AM CDT Monday the stage was 14.8 feet. - Bankfull stage is 14.0 feet. - Forecast...The river is expected to rise above flood stage tomorrow morning to a crest of 17.6 feet early Wednesday afternoon. It will then fall below flood stage late Thursday morning. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.6 feet on 02/27/1985. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 530 PM CDT.

Flood Warning issued April 6 at 10:32AM CDT until April 10 at 5:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 6, 2026, 10:32 AM
Expires: Mon April 6, 2026, 10:45 PM

...The Flood Warning is extended for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. * WHAT...Moderate flooding is forecast. * WHERE...Wisconsin River at Portage. * WHEN...Until Friday afternoon. * IMPACTS...At 18.0 feet, Water surrounds seasonal homes along Old River Rd in the Blackhawk Park area including water at the base of Caledonia/Lewiston Levee on Old River Rd. Old River Rd, W Lake Rd, Sec K Rd, Blackhawk Rd covered with water. West Lane Rd in Long Lake area has 4 feet of water over it in places. In the Town of Dekorra, about 12 homes are flooded on Hwy V. Water over River Oaks Rd and Oak Knoll Dr near Hwy V. * ADDITIONAL DETAILS... - At 8:30 AM CDT Monday the stage was 16.7 feet. - Bankfull stage is 12.7 feet. - Forecast...The river is expected to rise above flood stage this afternoon to a crest of 18.1 feet tomorrow evening. It will then fall below flood stage late Friday morning. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 18.1 feet on 04/16/2002. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this evening at 1045 PM CDT.

Flood Warning issued April 6 at 3:54PM CDT until April 10 at 5:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 6, 2026, 3:54 PM
Expires: Tue April 7, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Baraboo River At Reedsburg affecting Sauk County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Wisconsin River at Portage. * WHEN...Until Friday afternoon. * IMPACTS...At 18.0 feet, Water surrounds seasonal homes along Old River Rd in the Blackhawk Park area including water at the base of Caledonia/Lewiston Levee on Old River Rd. Old River Rd, W Lake Rd, Sec K Rd, Blackhawk Rd covered with water. West Lane Rd in Long Lake area has 4 feet of water over it in places. In the Town of Dekorra, about 12 homes are flooded on Hwy V. Water over River Oaks Rd and Oak Knoll Dr near Hwy V. * ADDITIONAL DETAILS... - At 3:25 PM CDT Monday the stage was 17.1 feet. - Bankfull stage is 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:25 PM CDT Monday was 17.1 feet. - Forecast...The river is expected to rise to a crest of 18.1 feet tomorrow evening. It will then fall below flood stage late Friday morning. - Flood stage is 17.0 feet. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. 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 late tonight at 400 AM CDT.

Flood Warning issued April 6 at 5:16AM CDT until April 8 at 9:24AM CDT by NWS Milwaukee/Sullivan WI

Effective: Mon April 6, 2026, 5:16 AM
Expires: Mon April 6, 2026, 5:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Baraboo River At Reedsburg affecting Sauk County. Baraboo River At Rock Springs affecting Sauk County. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Baraboo River at Reedsburg. * WHEN...Until late Wednesday morning. * IMPACTS...At 16.0 feet, There is widespread inundation of lowland in the Reedsburg area. Floodwaters affect West Second Street, Granite Avenue and South Webb Avenue along the river. Water affects the concrete deck of the South Webb Avenue bridge. Floodwaters are into Webb Park and Smith Conservancy. The Public Works Yard is under 2 to 2.5 feet of water. * ADDITIONAL DETAILS... - At 4:00 AM CDT Monday the stage was 14.7 feet. - Bankfull stage is 12.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Monday was 14.7 feet. - Forecast...The river is expected to rise to a crest of 16.5 feet just after midnight tonight. It will then fall below flood stage early Wednesday morning. - Flood stage is 14.0 feet. - Flood History...This crest compares to a previous crest of 16.9 feet on 09/24/2016. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this afternoon at 530 PM CDT.