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 19 at 10:26AM CDT until April 24 at 11:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 10:26 AM
Expires: Sun April 19, 2026, 10:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Milwaukee River Near Cedarburg affecting Ozaukee County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. ...The Flood Warning is extended for the following rivers in Wisconsin... Pecatonica River At Martintown affecting Green County. Root River Canal At Raymond affecting Racine County. ...Forecast flooding changed from Moderate to Major severity and increased in duration for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. * WHAT...Major flooding is occurring and major flooding is forecast. This approaches the flood of record. * WHERE...Wisconsin River at Portage. * WHEN...Until late Friday morning. * IMPACTS...At 19.0 feet, There is 1 foot of water over a low section of County Highway V in Dekorra. Floodwaters affect River Oaks Road and River Shores Road (Lewiston Township) as well as numerous roads in the Blackhawk Park area about 3 miles south of Portage. * ADDITIONAL DETAILS... - At 9:00 AM CDT Sunday the stage was 19.2 feet. - Bankfull stage is 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 AM CDT Sunday was 19.9 feet. - Forecast...The river is expected to fall below flood stage early Friday morning and continue falling to 15.5 feet Sunday, April 26. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 19.4 feet on 04/14/2011. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. 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 evening at 1030 PM CDT.

Flood Warning issued April 19 at 5:16PM CDT until April 24 at 11:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 5:16 PM
Expires: Mon April 20, 2026, 5:30 AM

...The Flood Warning continues for the following rivers in Wisconsin... Fox River Near Berlin affecting Green Lake County. Wisconsin River At Portage affecting Columbia County. * WHAT...Major flooding is occurring and moderate flooding is forecast. * WHERE...Wisconsin River at Portage. * WHEN...Until late Friday morning. * IMPACTS...At 19.0 feet, There is 1 foot of water over a low section of County Highway V in Dekorra. Floodwaters affect River Oaks Road and River Shores Road (Lewiston Township) as well as numerous roads in the Blackhawk Park area about 3 miles south of Portage. * ADDITIONAL DETAILS... - At 3:30 PM CDT Sunday the stage was 19.1 feet. - Bankfull stage is 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:30 PM CDT Sunday was 19.3 feet. - Forecast...The river is expected to rise to a crest of 19.2 feet this evening. 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 19.4 feet on 04/14/2011. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. 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 late tonight at 530 AM CDT.

Flood Warning issued April 19 at 9:51PM CDT until April 23 at 10:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 9:51 PM
Expires: Mon April 20, 2026, 10:00 AM

...The Flood Warning continues for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. Fox River Near Berlin affecting Green Lake County. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Wisconsin River at Portage. * WHEN...Until late Thursday evening. * IMPACTS...At 19.0 feet, There is 1 foot of water over a low section of County Highway V in Dekorra. Floodwaters affect River Oaks Road and River Shores Road (Lewiston Township) as well as numerous roads in the Blackhawk Park area about 3 miles south of Portage. * ADDITIONAL DETAILS... - At 9:00 PM CDT Sunday the stage was 18.9 feet. - Bankfull stage is 12.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Sunday was 19.2 feet. - Forecast...The river is expected to fall below flood stage Thursday afternoon and continue falling to 15.4 feet Sunday, April 26. - Flood stage is 17.0 feet. - Flood History...This crest compares to a previous crest of 18.9 feet on 04/18/2023. - http://www.weather.gov/safety/flood

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. 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 Monday morning at 1000 AM CDT.

Flood Warning issued April 19 at 10:26AM CDT until April 20 at 4:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 10:26 AM
Expires: Sun April 19, 2026, 10:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Milwaukee River Near Cedarburg affecting Ozaukee County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. ...The Flood Warning is extended for the following rivers in Wisconsin... Pecatonica River At Martintown affecting Green County. Root River Canal At Raymond affecting Racine County. ...Forecast flooding changed from Moderate to Major severity and increased in duration for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sugar River at Brodhead. * WHEN...Until tomorrow afternoon. * IMPACTS...At 6.5 feet, There is widespread flooding of lowland and agricultural land. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park. Some roads are flooded in Avon Township, including Beloit Newark Rd, about 6 miles downstream of Brodhead. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated. * ADDITIONAL DETAILS... - At 8:00 AM CDT Sunday the stage was 6.6 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 AM CDT Sunday was 8.1 feet. - Forecast...The river is expected to fall below flood stage late tomorrow morning and continue falling to 2.0 feet Sunday, April 26. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 6.6 feet on 03/13/1989. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. 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 evening at 1030 PM CDT.

Flood Warning issued April 19 at 10:26AM CDT until April 21 at 9:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 19, 2026, 10:26 AM
Expires: Sun April 19, 2026, 10:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Milwaukee River Near Cedarburg affecting Ozaukee County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. ...The Flood Warning is extended for the following rivers in Wisconsin... Pecatonica River At Martintown affecting Green County. Root River Canal At Raymond affecting Racine County. ...Forecast flooding changed from Moderate to Major severity and increased in duration for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is forecast. * WHERE...Pecatonica River at Martintown. * WHEN...Until late Tuesday evening. * IMPACTS...At 13.5 feet, Floodwaters affect Martintown Road and West River Road in the Martintown area. Upstream in Browntown, floodwaters affect highway MM and West Indies Road. * ADDITIONAL DETAILS... - At 10:00 AM CDT Sunday the stage was 13.3 feet. - Bankfull stage is 9.5 feet. - Forecast...The river is expected to rise above flood stage this afternoon to a crest of 13.8 feet just after midnight tonight. It will then fall below flood stage Tuesday afternoon. - Flood stage is 13.5 feet. - Flood History...This crest compares to a previous crest of 13.8 feet on 06/21/1996. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. 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 evening at 1030 PM CDT.