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Jefferson, WI Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: Jefferson, WI
Elevation: 840ft
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Active Weather Alerts

Flash Flood Warning
Issued: 1:03 AM Apr. 16, 2026 – National Weather Service
The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Warning for...
Southeastern Dodge County in southeastern Wisconsin...
Northeastern Jefferson County in southeastern Wisconsin...
Milwaukee County in southeastern Wisconsin...
Ozaukee County in southeastern Wisconsin...
Washington County in southeastern Wisconsin...
Waukesha County in southeastern Wisconsin...

* Until 1100 PM CDT.

* At 803 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Rainfall amounts of 1 to 2
inches are possible in the warned area. Flash flooding is ongoing
or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Milwaukee, Waukesha, West Allis, Wauwatosa, New Berlin,
Brookfield, Greenfield, Menomonee Falls, Oak Creek, West Bend,
Muskego, Watertown, Mequon, South Milwaukee, Cudahy, Hartford,
Whitefish Bay, Greendale, Pewaukee and Brown Deer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&


FLASH FLOOD...RADAR INDICATED

Flood Watch
Issued: 12:43 AM Apr. 16, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY...

* WHAT...Flooding caused by excessive rainfall on a saturated ground
continues to be possible.

* WHERE...Portions of east central, south central, and southeast
Wisconsin, including the following counties, in east central
Wisconsin, Fond du Lac and Sheboygan. In south central Wisconsin,
Columbia, Dane, Green, Green Lake, Iowa, Lafayette, Marquette,
Rock and Sauk. In southeast Wisconsin, Dodge, Jefferson, Kenosha,
Milwaukee, Ozaukee, Racine, Walworth, Washington and Waukesha.

* WHEN...Until 7 AM CDT Thursday.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks.

* ADDITIONAL DETAILS...
- Flooding and flash flooding is possible from thunderstorms
with heavy rain on saturated ground
- http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

&&

Flash Flood Warning
Issued: 12:27 AM Apr. 16, 2026 – National Weather Service
The National Weather Service in Milwaukee/Sullivan has issued a

* Flash Flood Warning for...
Southeastern Dane County in south central Wisconsin...
Green County in south central Wisconsin...
Central Lafayette County in south central Wisconsin...
Northern Rock County in south central Wisconsin...
Jefferson County in southeastern Wisconsin...
Northwestern Walworth County in southeastern Wisconsin...

* Until 1030 PM CDT.

* At 726 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Up to
0.75 inches of rain have fallen. Additional rainfall amounts of 1
to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Eastern Madison, Janesville, Fitchburg, Whitewater, Stoughton,
Fort Atkinson, Monroe, Verona, Oregon, Jefferson, McFarland,
Monona, Lake Mills, Milton, Edgerton, Evansville, Marshall,
Waterloo, Brodhead and Darlington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&


FLASH FLOOD...RADAR AND GAUGE INDICATED;
EXPECTED RAINFALL RATE...0.75-1.5 INCHES IN 1 HOUR

River Flood Watch
Issued: 10:56 PM Apr. 15, 2026 – National Weather Service
...FLOOD WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON UNTIL FURTHER
NOTICE...

* WHAT...Flooding is possible.

* WHERE...Crawfish River at Milford.

* WHEN...From Thursday afternoon until further notice.

* IMPACTS...At 8.0 feet, There is widespread flooding of
agricultural land and lowland. There is widespread flooding in
Riverbend Campground, about 5 miles upstream of Milford.

* ADDITIONAL DETAILS...
- At 5:00 PM CDT Wednesday the stage was 6.1 feet.
- Forecast...Flood stage may be reached tomorrow afternoon.
- Flood stage is 7.0 feet.
- 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 pm...
Location        stage stage     stage/time    Thu  Fri  Sat  Sun
Milford         7.0   5.0   6.07  5 pm 4/15   7.1  7.6  7.9  8.1

-                    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
Milford         6.07  4 pm 4/15         0.88       8.20  7 pm 4/21


&&


River Flood Watch
Issued: 10:56 PM Apr. 15, 2026 – National Weather Service
...FLOOD WATCH IN EFFECT FROM THURSDAY EVENING UNTIL FURTHER
NOTICE...

* WHAT...Flooding is possible.

* WHERE...Rock River at Fort Atkinson.

* WHEN...From Thursday evening until further notice.

* IMPACTS...At 17.0 feet, Floodwaters are in the back yards of some
homes on Rogers Street on the northeast side of Fort Atkinson and
water surrounds a few homes and businesses at the end of Vets Lane
near the intersection of Hwy 106 and Blackhawk Island Rd. These
roads are flooded in the Fort Atkinson area: Sinissippi Drive,
Vets Ln, Fox Hill Rd, Bark River Road from Kutz Road to Rock River
Road, Rock River Rd from Milwaukee Ave E to Hwy 106, North Shore
Rd, Ralph Rd. The river walkway in Fort Atkinson becomes flooded.

* ADDITIONAL DETAILS...
- At 5:00 PM CDT Wednesday the stage was 14.8 feet.
- Forecast...Flood stage may be reached tomorrow evening.
- Flood stage is 16.0 feet.
- 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 pm...
Location        stage stage     stage/time    Thu  Fri  Sat  Sun
Fort Atkinson   16.0  14.5  14.80 5 pm 4/15   16.0 16.8 16.9 16.6

-                    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
Fort Atkinson   14.8  4 pm 4/15         0.69       16.90 7 pm 4/18


&&


River Flood Warning
Issued: 10:51 PM Apr. 15, 2026 – National Weather Service
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Moderate flooding is forecast.

* WHERE...Rock River at Watertown.

* WHEN...Until further notice.

* IMPACTS...At 6.0 feet, Water nears some streets in Watertown.
Water is in Riverside Park in Watertown. About 6 miles upstream
near Ixonia, Wayside park on Highway 16, and Kanow Park is
flooded. Rock River Road near Highway 16 is flooded.

* ADDITIONAL DETAILS...
- At 5:00 PM CDT Wednesday the stage was 5.3 feet.
- Bankfull stage is 4.0 feet.
- Forecast...The river is expected to rise to a crest of 6.1
feet Tuesday morning. It will then rise to 6.1 feet Tuesday
morning. Additional rises are possible thereafter.
- Flood stage is 5.5 feet.
- Flood History...This crest compares to a previous crest of
6.1 feet on 06/12/2004.
- 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 pm...
Location        stage stage     stage/time    Thu  Fri  Sat  Sun
Watertown       5.5   4.0   5.28  5 pm 4/15   5.4  5.6  5.8  5.9

-                    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
Watertown       6.0   10 am 4/15        1.15       6.10  1 pm 4/22


&&



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