Every watch, warning and advisory the National Weather Service has in force over Johnson County, Iowa. Open it for the live map, where it pans and zooms.
Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.
Alerts in force5
Every product in force for Johnson County, worst first, with its full text.
Flood Warning
Severe
Flood Warning issued September 20 at 10:02AM CDT until September 23 at 6:25PM CDT by NWS Quad Cities IA IL
Begins Until 3 days left
Areas Johnson, IA; Louisa, IA; Washington, IA
Full text
...The Flood Warning is extended for the following rivers in Iowa...
Iowa River near Lone Tree affecting Louisa, Washington and Johnson
Counties.
* WHAT...Minor flooding is forecast.
* WHERE...Iowa River near Lone Tree.
* WHEN...Until Wednesday evening.
* IMPACTS...At 18.0 feet, Sand Road closes south of 520th Street to
the Highway 22 intersection.
* ADDITIONAL DETAILS...
- At 9:00 AM CDT Sunday the stage was 15.7 feet and rising.
- Forecast...The river will rise above flood stage this afternoon
to 16.8 feet this evening. It may fall briefly, but likely to
rise again Monday night into Tuesday to 17.5 feet. It will then
fall below flood stage Wednesday.
- Flood stage is 16.0 feet.
What to do
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
The next statement will be issued by Monday morning.
Flood Warning issued September 20 at 8:06AM CDT until September 20 at 2:00PM CDT by NWS Quad Cities IA IL
Issued Until 3 hr 51 min left
Areas Cedar, IA; Iowa, IA; Johnson, IA; Keokuk, IA; Louisa, IA; Muscatine, IA; Washington, IA
Full text
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Southern Cedar County in east central Iowa...
Iowa County in east central Iowa...
Johnson County in east central Iowa...
Muscatine County in east central Iowa...
Keokuk County in southeastern Iowa...
Northwestern Louisa County in southeastern Iowa...
Washington County in southeastern Iowa...
* WHEN...Until 200 PM CDT.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring. Streams
continue to rise due to excess runoff from earlier rainfall.
Low-water crossings are inundated with water and may not be
passable. Expect many areas of slow moving or standing water. It
will take several hours for all the water from these storms to work
through local drainage systems in urban areas.
* ADDITIONAL DETAILS...
- At 804 AM CDT, Doppler radar and automated rain gauges indicated
heavy rain of 2 to 5 inches occurred since last evening across
the area. This heavy rain falling on saturated ground has
resulted in flooding of low lying areas, streams, creeks, rivers
and poorly drained areas. The threat for heavy rain has ended,
but runoff will delay the fall of water levels and improvement in
conditions.
- Some locations that will experience flooding include...
Iowa City, Muscatine, Washington, Tipton, Marengo, West Branch,
Sigourney, Columbus Junction, Durant, Coralville, North Liberty,
West Liberty, Williamsburg, Wilton, Kalona, Tiffin, Wellman, Lone
Tree and University Heights.
- This includes the following highways...
Interstate 80 in Iowa between mile markers 205 and 277.
Interstate 380 between mile markers 1 and 7.
What to do
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Flood Warning issued September 20 at 7:55AM CDT until September 20 at 1:45PM CDT by NWS Quad Cities IA IL
Issued Until 3 hr 36 min left
Areas Benton, IA; Cedar, IA; Iowa, IA; Johnson, IA; Jones, IA; Linn, IA
Full text
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Benton County in east central Iowa...
Northern Cedar County in east central Iowa...
Northern Iowa County in east central Iowa...
Northern Johnson County in east central Iowa...
Jones County in east central Iowa...
Linn County in east central Iowa...
* WHEN...Until 145 PM CDT.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring. Streams
continue to rise due to excess runoff from earlier rainfall.
Low-water crossings are inundated with water and may not be
passable. Expect many areas of slow moving or standing water.
* ADDITIONAL DETAILS...
- At 755 AM CDT, Doppler radar indicated heavy rain due to Runoff
from recent heavy rain will lead to flooding of low- lying spots,
urban areas, small streams and creeks and poor- drainage areas.
The threat for heavy rain has ended, but runoff will delay fall
of water levels and improvement in conditions. . Flooding is
already occurring in the warned area.
- Some locations that will experience flooding include...
Cedar Rapids, Anamosa, Vinton, Marengo, Mechanicsville, Stanwood,
Marion, Hiawatha, Mount Vernon, Robins, Belle Plaine, Center
Point, Lisbon, Fairfax, Solon, Ely, Atkins, Walford, Springville
and Palo.
- This includes Interstate 380 between mile markers 8 and 36.
What to do
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Flood Warning issued September 20 at 5:32AM CDT until September 22 at 5:00PM CDT by NWS Quad Cities IA IL
Issued Until 2 days left
Areas Johnson, IA; Washington, IA
Full text
...The Flood Warning continues for the following rivers in Iowa...
English River at Kalona affecting Washington and Johnson Counties.
* WHAT...Moderate flooding is occurring and moderate flooding is
forecast.
* WHERE...English River at Kalona.
* WHEN...Until Tuesday afternoon.
* IMPACTS...At 18.0 feet, Water has overtopped roads causing
closures. This includes 130th St, Kiwi Ave, Orange Ave and Poplar
Ave. Extensive agricultural land near the river is flooded. Water
begins backing into town on the north side of the river.
* ADDITIONAL DETAILS...
- At 5:00 AM CDT Sunday the stage was 16.7 feet.
- Forecast...The river is expected to rise to a crest of 17.9 feet
just after midnight tonight. It will then fall below flood stage
late Tuesday morning.
- Flood stage is 14.0 feet.
What to do
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at www.weather.gov/quadcities.
The next statement will be issued by late tonight.
Flood Watch issued September 20 at 9:24AM CDT until September 20 at 1:00PM CDT by NWS Quad Cities IA IL
Issued Until 2 hr 51 min left
Areas Buchanan, IA; Delaware, IA; Dubuque, IA; Benton, IA; Linn, IA; Jones, IA; Jackson, IA; Iowa, IA; Johnson, IA; Cedar, IA; Clinton, IA; Muscatine, IA; Scott, IA; Keokuk, IA; Washington, IA; Louisa, IA; Jo Daviess, IL; Stephenson, IL; Carroll, IL; Whiteside, IL; Rock Island, IL; Henry, IL; Bureau, IL; Putnam, IL; Mercer, IL
Full text
* WHAT...Flooding caused by excessive rainfall overnight continues to
be possible.
* WHERE...Portions of Illinois, including the following areas,
Bureau, Carroll, Henry IL, Jo Daviess, Mercer, Putnam, Rock Island,
Stephenson and Whiteside and Iowa, including the following areas,
Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque, Iowa, Jackson,
Johnson, Jones, Keokuk, Linn, Louisa, Muscatine, Scott and
Washington.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Flooding may occur in poor drainage and urban areas. Area
creeks and streams are running high and could flood with more heavy
rain.
* ADDITIONAL DETAILS...
- Heavy rains have ended over the area, but many area creeks are
running high and in some cases, are flooding this morning. This
areal flooding will continue this morning, with additional
rainfall amounts under one quarter inch.
What to do
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.
In the past year the National Weather Service issued 159 alerts for Johnson County, including 41 severe thunderstorm warnings, 11 flood warnings, 6 tornado warnings and 5 flash flood warnings.
From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.
Nearby
The counties around Johnson County, with what is in force in each.
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.
