Rock 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
Minor flooding is occurring and moderate flooding is forecast.
Where
Rock River at Afton.
When
Until further notice.
Impacts
At 11.5 feet, Water surrounds at least 2 homes near the river in the Afton area. Numerous secondary roads in the Afton area are closed to traffic. Floodwaters affect South River Road on the south side of Janesville. Traxler Park off of Memorial Drive in Janesville is flooded.
Additional Details
- At 7:00 AM CDT Sunday the stage was 10.4 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:00 AM CDT Sunday was 11.3 feet. - Forecast...The river is expected to rise to 11.7 feet Friday evening. Additional rises are possible thereafter. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 11.8 feet on 04/10/1959. - 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
- Winnebago, IL
- 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 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 – Monday 04/20 4:00 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
Sugar River at Brodhead.
When
Until tomorrow afternoon.
Impacts
At 6.5 feet, There is widespread flooding of lowland and agricultural land. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park. Some roads are flooded in Avon Township, including Beloit Newark Rd, about 6 miles downstream of Brodhead. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated.
Additional Details
- At 8:00 AM CDT Sunday the stage was 6.6 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 AM CDT Sunday was 8.1 feet. - Forecast...The river is expected to fall below flood stage late tomorrow morning and continue falling to 2.0 feet Sunday, April 26. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 6.6 feet on 03/13/1989. - 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
- Winnebago, IL
- Green, 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.
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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