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Elev 820 ft, 42.93 °N, 88.84 °W

Fort Atkinson, WI Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Fort Atkinson, WI
Elevation: 820ft
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Active Weather Alerts

River Flood Warning
Issued: 3:27 PM Apr. 30, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL TOMORROW MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Rock River at Jefferson.

* WHEN...Until tomorrow morning.

* IMPACTS...At 10.0 feet, Water affects low lying areas of
residential property in the City of Jefferson. Rock River Park and
boat launch is affected near Hwy B in Johnson Creek.

* ADDITIONAL DETAILS...
- At 10:00 AM CDT Thursday the stage was 10.2 feet.
- Bankfull stage is 8.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Thursday was 10.4 feet.
- Forecast...The river is expected to fall below flood stage
just after midnight tonight and continue falling to 7.3 feet
Thursday, May 07.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
10.3 feet on 04/05/2007.
- 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    Fri  Sat  Sun  Mon
Jefferson       10.0  8.0   10.21 10 am 4/30  9.8  9.4  9.0  8.6

-                    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
Jefferson       11.42 12 pm 4/23       -0.18       10.10 7 pm 4/30


&&



River Flood Warning
Issued: 3:27 PM Apr. 30, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL EARLY SUNDAY MORNING...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Rock River at Fort Atkinson.

* WHEN...Until early Sunday morning.

* IMPACTS...At 16.5 feet, In the Fort Atkinson area, the following
roads are impacted: Sinnissippi Drive, Bark River Road from Kutz
Road to Rock River Road, and Rock River Road from Highway 106 to
the Fort Atkinson city limits. Water is in park land near the
river in Fort Atkinson.

* ADDITIONAL DETAILS...
- At 10:00 AM CDT Thursday the stage was 16.5 feet.
- Bankfull stage is 14.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Thursday was 16.7 feet.
- Forecast...The river is expected to fall below flood stage
Saturday evening and continue falling to 14.7 feet Thursday,
May 07.
- Flood stage is 16.0 feet.
- Flood History...This crest compares to a previous crest of
16.4 feet on 03/18/2009.
- 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    Fri  Sat  Sun  Mon
Fort Atkinson   16.0  14.5  16.51 10 am 4/30  16.3 16.1 15.8 15.5

-                    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
Fort Atkinson   17.36 2 pm 4/23        -0.15       16.50 1 pm 4/30


&&



River Flood Warning
Issued: 3:27 PM Apr. 30, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL TUESDAY MORNING...

* WHAT...Minor flooding is occurring and minor 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 10:00 AM CDT Thursday the stage was 10.9 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:00 AM CDT Thursday was 11.0 feet.
- Forecast...The river is expected to fall below flood stage
early Tuesday morning and continue falling to 9.4 feet
Thursday, May 07.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
11.0 feet on 10/15/2019.
- 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 1 pm...
Location        stage stage     stage/time    Fri  Sat  Sun  Mon
Lake Koshkonong 10.0  9.0   10.85 10 am 4/30  10.7 10.5 10.4 10.1

-                    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
Lake Koshkonong 11.42 3 pm 4/24        -0.16       10.80 1 am 5/01


&&



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