Active Weather Alerts
River Flood Warning
Issued: 8:26 PM Apr. 29, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 10.5 feet, Floodwaters affect Riverside Park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 3:00 PM CDT Wednesday the stage was 10.4 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Wednesday was 10.4 feet. - Forecast...The river is expected to fall to 9.1 feet Wednesday, May 06. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 10.4 feet on 03/29/1952. - 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 1 pm... Location stage stage stage/time Thu Fri Sat Sun Afton 9.0 8.0 10.40 3 pm 4/29 10.3 10.1 10.0 9.8 - 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 Afton 10.77 3 pm 4/22 0.05 10.40 1 pm 4/29 &&
River Flood Warning
Issued: 8:26 PM Apr. 29, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE... * WHAT...Minor flooding is occurring. * WHERE...Rock River at Newville. * WHEN...Until further notice. * IMPACTS...At 7.5 feet, Floodwaters surround some homes near East Mallwood Drive and are into yards and roads across eastern Newville. Floodwaters affect a riverside restaurant and its parking lot on the south side of the river. * ADDITIONAL DETAILS... - At 3:00 PM CDT Wednesday the stage was 7.2 feet. - Bankfull stage is 5.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Wednesday was 7.2 feet. - Forecast...No forecast is available for this location. - Flood stage is 6.5 feet. - Flood History...This crest compares to a previous crest of 7.1 feet on 10/14/2019. - 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 5 pm... Location stage stage stage/time Thu Fri Sat Sun Newville 6.5 5.5 7.15 3 pm 4/29 not a forecast point - 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 Newville 7.61 1 pm 4/27 -0.04 Not Available &&
River Flood Warning
Issued: 8:26 PM Apr. 29, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL TUESDAY MORNING... * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until Tuesday morning. * IMPACTS...At 11.0 feet, In the Town of Lake Koshkonong, floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow Bend Road. There is widespread flooding of roads and docks in the Town of Koshkonong and Town of Sumner including Vets Lane, Blackhawk Island Road and Oxbow Bend Road. * ADDITIONAL DETAILS... - At 3:00 PM CDT Wednesday the stage was 11.0 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Wednesday was 11.1 feet. - Forecast...The river is expected to fall below flood stage early Tuesday morning and continue falling to 9.7 feet Wednesday, May 06. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 11.0 feet on 06/07/2000. - 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 1 pm... Location stage stage stage/time Thu Fri Sat Sun Lake Koshkonong 10.0 9.0 11.00 3 pm 4/29 10.9 10.7 10.5 10.3 - 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 Lake Koshkonong 11.42 3 pm 4/24 -0.12 11.00 7 pm 4/29 &&
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