Jefferson County, WI
Alerts
Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.
In effect from Sunday 04/19 10:26 AM CDT – Sunday 04/19 10:30 PM CDT
Issued by NWS Milwaukee/Sullivan WI
...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
Moderate flooding is occurring and moderate flooding is forecast.
Where
Rock River at Fort Atkinson.
When
Until further notice.
Impacts
At 17.5 feet, Floodwaters partially cover low spots on Highway 106 near Rock River Park. A riverside walkway near South Water Street in downtown Fort Atkinson is closed. A few homes and businesses are surrounded by water at the end of Vets lane near the intersection of Highway 106 and Blackhawk Island Road about 1 mile southwest of Fort Atkinson. North Shore Road about 1 mile southwest of Fort Atkinson is closed. Ralph Rd impacted. Floodwaters cover fields on the east side of Fort Atkinson.
Additional Details
- At 9:00 AM CDT Sunday the stage was 17.3 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 AM CDT Sunday was 17.3 feet. - Forecast...The river is expected to rise to a crest of 17.5 feet early tomorrow afternoon. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.4 feet on 09/11/2018. - http://www.weather.gov/safety/flood
What to do
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.
Areas impacted
- Jefferson, WI
Tips to stay safe
A Flood Warning means that dangerous flooding is expected or already happening. Take immediate action to protect yourself and your home.
- If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
- If you are trapped in a building, move to the highest floor and call 911. Go to the roof only if necessary.
- Do not go into any room where electrical cords or outlets are under water. Stay out of water that may have electricity in it!
- If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, move to the roof and signal for help.
In effect from Sunday 04/19 10:26 AM CDT – Sunday 04/19 10:30 PM CDT
Issued by NWS Milwaukee/Sullivan WI
...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 major flooding is forecast.
Where
Rock River near Lake Koshkonong.
When
Until further notice.
Impacts
At 11.3 feet, There is knee-deep water over Blackhawk Island Road. Lamp Road on west side of river also becomes flooded. Lake Koshkonong merges with Mud Lake to the east of Lake Koshkonong.
Additional Details
- At 8:00 AM CDT Sunday the stage was 10.4 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 AM CDT Sunday was 10.4 feet. - Forecast...The river is expected to rise to a crest of 11.5 feet early Thursday morning. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 11.5 feet on 03/25/2019. - http://www.weather.gov/safety/flood
What to do
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.
Areas impacted
- Jefferson, WI
- Rock, WI
Tips to stay safe
A Flood Warning means that dangerous flooding is expected or already happening. Take immediate action to protect yourself and your home.
- If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
- If you are trapped in a building, move to the highest floor and call 911. Go to the roof only if necessary.
- Do not go into any room where electrical cords or outlets are under water. Stay out of water that may have electricity in it!
- If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, move to the roof and signal for help.
In effect from Sunday 04/19 10:26 AM CDT – Sunday 04/19 10:30 PM CDT
Issued by NWS Milwaukee/Sullivan WI
...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 major flooding is forecast.
Where
Rock River at Watertown.
When
Until further notice.
Impacts
At 6.5 feet, Floodwaters affect some streets in Watertown. Water is in Riverside Park. About 6 miles upstream near Ixonia, Wayside park along Highway 16 and Kanow Park is flooded. Rock River Road near Highway 16 is flooded.
Additional Details
- At 10:00 AM CDT Sunday the stage was 5.5 feet. - Bankfull stage is 4.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Sunday was 5.8 feet. - Forecast...The river is expected to rise to 6.5 feet Friday morning. Additional rises are possible thereafter. - Flood stage is 5.5 feet. - Flood History...This crest compares to a previous crest of 6.3 feet on 04/04/1959. - http://www.weather.gov/safety/flood
What to do
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.
Areas impacted
- Jefferson, WI
Tips to stay safe
A Flood Warning means that dangerous flooding is expected or already happening. Take immediate action to protect yourself and your home.
- If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
- If you are trapped in a building, move to the highest floor and call 911. Go to the roof only if necessary.
- Do not go into any room where electrical cords or outlets are under water. Stay out of water that may have electricity in it!
- If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, move to the roof and signal for help.
In effect from Sunday 04/19 10:26 AM CDT – Sunday 04/19 10:30 PM CDT
Issued by NWS Milwaukee/Sullivan WI
...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
Moderate flooding is occurring and moderate flooding is forecast.
Where
Rock River at Jefferson.
When
Until further notice.
Impacts
At 12.0 feet, Riverview Drive is closed due to floodwaters on the road. The Tensfeldt Park boat launch is closed. Intersection of S Main St and E Dane St is closed, and S Center Ave. Floodwaters affect highway K between Jefferson and Fort Atkinson. River's Edge Park flooded.
Additional Details
- At 10:00 AM CDT Sunday the stage was 11.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Sunday was 11.6 feet. - Forecast...The river is expected to rise to 12.6 feet early Thursday afternoon. Additional rises are possible thereafter. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 12.8 feet on 04/02/1979. - http://www.weather.gov/safety/flood
What to do
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.
Areas impacted
- Jefferson, WI
Tips to stay safe
A Flood Warning means that dangerous flooding is expected or already happening. Take immediate action to protect yourself and your home.
- If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
- If you are trapped in a building, move to the highest floor and call 911. Go to the roof only if necessary.
- Do not go into any room where electrical cords or outlets are under water. Stay out of water that may have electricity in it!
- If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, move to the roof and signal for help.
In effect from Sunday 04/19 10:26 AM CDT – Sunday 04/19 10:30 PM CDT
Issued by NWS Milwaukee/Sullivan WI
...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
Crawfish River at Milford.
When
Until further notice.
Impacts
At 9.0 feet, Water approaches some homes in Milford. There is widespread flooding of roads in Riverbend Campground, about 5 miles upstream of Milford.
Additional Details
- At 10:00 AM CDT Sunday the stage was 8.1 feet. - Bankfull stage is 5.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Sunday was 8.1 feet. - Forecast...The river is expected to rise to a crest of 8.6 feet early Tuesday afternoon. - Flood stage is 7.0 feet. - Flood History...This crest compares to a previous crest of 8.6 feet on 06/02/2004. - http://www.weather.gov/safety/flood
What to do
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.
Areas impacted
- Jefferson, WI
Tips to stay safe
A Flood Warning means that dangerous flooding is expected or already happening. Take immediate action to protect yourself and your home.
- If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
- If you are trapped in a building, move to the highest floor and call 911. Go to the roof only if necessary.
- Do not go into any room where electrical cords or outlets are under water. Stay out of water that may have electricity in it!
- If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, move to the roof and signal for help.
Briefing
From the forecaster
Some Much-Needed Quiet Weather
Created by the NWS Milwaukee/Sullivan WFO
Some much-needed quiet weather is forecast through the next several days in southern Wisconsin.
Seven-day weather risk overview
Daily weather risk summary
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