Active Weather Alerts
River Flood Warning
Issued: 9:21 AM May. 4, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL EARLY WEDNESDAY MORNING... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until early Wednesday morning. * IMPACTS...At 10.5 feet, Floodwaters reach Oxbow Bend Road in the area of the gage on the east side of the lake. * ADDITIONAL DETAILS... - At 4:00 AM CDT Monday the stage was 10.3 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Monday was 10.4 feet. - Forecast...The river is expected to fall below flood stage tomorrow evening and continue falling to 9.1 feet Sunday evening. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.1 feet on 03/30/2011. - 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 am... Location stage stage stage/time Tue Wed Thu Fri Lake Koshkonong 10.0 9.0 10.27 4 am 5/04 10.1 9.9 9.7 9.6 - 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 11.23 1 pm 4/27 -0.15 10.30 1 am 5/04 &&
Special Weather Statement
Issued: 6:33 AM May. 4, 2026 – National Weather Service
...ELEVATED FIRE WEATHER CONDITIONS TODAY... Warm, dry and breezy conditions today will lead to an elevated concern for fire weather across southern WI. Given recent rains and green up largely being complete, it is not thought that fuels are at a near critical level but the weather conditions are. Highs in the upper 70s, relative humidities falling to the 20-30 percent range and sustained winds around 15-20 mph with gusts to 35 mph all contribute to the increased fire weather concerns.
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