Iowa alerts

Louisa County, Iowa weather alerts

9 National Weather Service alerts are in force for Louisa County: 2 flood warnings and 7 flood watches.

Checked Sun, Sep 20, 2026, 9:29 AM CDT. Times are Central Daylight Time.

Louisa County forecastLive radar here

Radar

Reflectivity now over Louisa County, Iowa. Open it to see warnings and watches on the map.

Open the live radar with warnings and watches

Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.

Alerts in force9

Every product in force for Louisa County, worst first, with its full text.

Flood Warning

Severe

Flood Warning issued September 20 at 8:06AM CDT until September 20 at 2:00PM CDT by NWS Quad Cities IA IL

Issued Until 4 hr 31 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.

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Flood Warning

Severe

Flood Warning issued September 20 at 5:43AM CDT until September 22 at 6:00PM CDT by NWS Quad Cities IA IL

Begins Until 2 days left

Areas Johnson, IA; Louisa, IA; Washington, IA

Full text

...The National Weather Service in Quad Cities has issued a Flood Warning 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...From this morning to Tuesday evening. * IMPACTS...At 18.0 feet, Sand Road closes south of 520th Street to the Highway 22 intersection. * ADDITIONAL DETAILS... - At 5:00 AM CDT Sunday the stage was 13.7 feet. - Forecast...The river is expected to rise above flood stage late this morning to a crest of 18.0 feet this evening. It will then fall below flood stage late Tuesday morning. - Flood stage is 16.0 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.

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Flood Watch

Severe

Flood Watch issued September 20 at 9:24AM CDT until September 20 at 1:00PM CDT by NWS Quad Cities IA IL

Issued Until 3 hr 31 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.

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Flood Watch

Severe

Flood Watch issued September 19 at 10:12PM CDT until September 25 at 3:00AM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Muscatine, IA; Louisa, IA; Rock Island, IL; Mercer, IL

Full text

...The National Weather Service in Quad Cities has issued a Flood Watch for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Rock Island LD15 affecting Scott, Muscatine and Rock Island zones. Mississippi River at Muscatine affecting Mercer, Muscatine, Rock Island and Louisa Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Keithsburg affecting Henderson, Des Moines, Louisa and Mercer Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island zones. Mississippi River at Burlington affecting Hancock, Des Moines, Henderson and Lee Counties. Mississippi River at Gregory Landing affecting Hancock and Clark Counties. * WHAT...Flooding is possible. * WHERE...Mississippi River at Muscatine. * WHEN...From late Monday night to late Thursday night. * ADDITIONAL DETAILS... - At 8:15 PM CDT Saturday the stage was 7.6 feet. - Forecast...Flood stage may be reached early Tuesday morning. - Flood stage is 16.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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Flood Watch

Severe

Flood Watch issued September 19 at 10:12PM CDT until September 25 at 1:00PM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Louisa, IA; Mercer, IL

Full text

...The National Weather Service in Quad Cities has issued a Flood Watch for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Rock Island LD15 affecting Scott, Muscatine and Rock Island zones. Mississippi River at Muscatine affecting Mercer, Muscatine, Rock Island and Louisa Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Keithsburg affecting Henderson, Des Moines, Louisa and Mercer Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island zones. Mississippi River at Burlington affecting Hancock, Des Moines, Henderson and Lee Counties. Mississippi River at Gregory Landing affecting Hancock and Clark Counties. * WHAT...Flooding is possible. * WHERE...Mississippi River at New Boston LD17. * WHEN...From late Monday night to Friday afternoon. * ADDITIONAL DETAILS... - At 9:10 PM CDT Saturday the stage was 7.2 feet. - Forecast...Flood stage may be reached early Tuesday morning. - Flood stage is 15.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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Flood Watch

Severe

Flood Watch issued September 19 at 10:12PM CDT until September 26 at 3:00AM CDT by NWS Quad Cities IA IL

Begins Until 6 days left

Areas Louisa, IA; Des Moines, IA; Mercer, IL; Henderson, IL

Full text

...The National Weather Service in Quad Cities has issued a Flood Watch for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Rock Island LD15 affecting Scott, Muscatine and Rock Island zones. Mississippi River at Muscatine affecting Mercer, Muscatine, Rock Island and Louisa Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Keithsburg affecting Henderson, Des Moines, Louisa and Mercer Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island zones. Mississippi River at Burlington affecting Hancock, Des Moines, Henderson and Lee Counties. Mississippi River at Gregory Landing affecting Hancock and Clark Counties. * WHAT...Flooding is possible. * WHERE...Mississippi River at Keithsburg. * WHEN...From Tuesday morning to late Friday night. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 7.6 feet. - Forecast...Flood stage may be reached Tuesday morning. - Flood stage is 14.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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Flood Watch

Severe

Flood Watch issued September 19 at 8:43PM CDT until September 25 at 12:00PM CDT by NWS Quad Cities IA IL

Begins Until 5 days left

Areas Muscatine, IA; Louisa, IA

Full text

...The Flood Watch is extended for the following rivers in Iowa... Cedar River near Conesville affecting Muscatine and Louisa Counties. English River at Kalona affecting Johnson and Washington Counties. * WHAT...Flooding is possible. * WHERE...Cedar River near Conesville. * WHEN...From late Sunday night to Friday afternoon. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 9.6 feet. - Forecast...Flood stage may be reached early Monday morning. - Flood stage is 13.0 feet.

What to do

If you are in the watch area, remain alert to possible flooding. Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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Flood Watch

Severe

Flood Watch issued September 19 at 8:42PM CDT until September 26 at 2:00AM CDT by NWS Quad Cities IA IL

Begins Until 6 days left

Areas Louisa, IA

Full text

...The National Weather Service in Quad Cities has issued a Flood Watch for the following rivers in Iowa... Iowa River at Wapello affecting Louisa County. Iowa River at Oakville affecting Louisa County. * WHAT...Flooding is possible. * WHERE...Iowa River at Oakville. * WHEN...From Tuesday evening to late Friday night. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 5.7 feet. - Forecast...Flood stage may be reached Tuesday evening. - Flood stage is 11.0 feet.

What to do

Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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Flood Watch

Severe

Flood Watch issued September 19 at 8:42PM CDT until September 26 at 3:00AM CDT by NWS Quad Cities IA IL

Begins Until 6 days left

Areas Louisa, IA

Full text

...The National Weather Service in Quad Cities has issued a Flood Watch for the following rivers in Iowa... Iowa River at Wapello affecting Louisa County. Iowa River at Oakville affecting Louisa County. * WHAT...Flooding is possible. * WHERE...Iowa River at Wapello. * WHEN...From Tuesday morning to late Friday night. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 15.9 feet. - Forecast...Flood stage may be reached late Tuesday morning. - Flood stage is 21.0 feet.

What to do

Residents and those with interests near the river should monitor rising water levels and be prepared for possible Flood Warnings. Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. The next statement will be issued by Sunday evening.

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The past year in Louisa County

In the past year the National Weather Service issued 160 alerts for Louisa County, including 31 severe thunderstorm warnings, 23 flood warnings, 5 tornado warnings and 4 flash flood warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning31Sep 20, 2026
Flood Warning23Sep 20, 2026
Tornado Warning5Aug 19, 2026
Flash Flood Warning4Sep 20, 2026
Extreme Heat Warning3Sep 2, 2026
Red Flag Warning3Mar 28, 2026
Freeze Warning2Apr 20, 2026
High Wind Warning2Mar 15, 2026
Blizzard Warning1Mar 15, 2026
Extreme Cold Warning1Jan 23, 2026
Winter Storm Warning1Nov 29, 2025
Flood Watch22Sep 21, 2026
Tornado Watch10Jul 20, 2026
Severe Thunderstorm Watch9Aug 13, 2026
Extreme Heat Watch2Jul 26, 2026
Fire Weather Watch2Feb 27, 2026
Winter Storm Watch2Mar 15, 2026
Extreme Cold Watch1Jan 23, 2026
High Wind Watch1Mar 15, 2026
Dense Fog Advisory10Sep 11, 2026
Wind Advisory7Apr 2, 2026
Heat Advisory6Aug 31, 2026
Winter Weather Advisory6Mar 16, 2026
Cold Weather Advisory4Jan 26, 2026
Frost Advisory2May 2, 2026

Warnings issued

  1. Flood Warning
  2. Flood Warning
  3. Severe Thunderstorm Warning
  4. Flash Flood Warning
  5. Extreme Heat Warning
  6. Tornado Warning
  7. Flood Warning
  8. Flash Flood Warning
  9. Flood Warning
  10. Flood Warning
  11. Flash Flood Warning
  12. Severe Thunderstorm Warning
  13. Extreme Heat Warning
  14. Severe Thunderstorm Warning
  15. Flood Warning
  16. Extreme Heat Warning
  17. Flood Warning
  18. Flood Warning
  19. Flood Warning
  20. Severe Thunderstorm Warning
  21. Flash Flood Warning
  22. Severe Thunderstorm Warning
  23. Severe Thunderstorm Warning
  24. Severe Thunderstorm Warning
  25. Flood Warning
  26. Flood Warning
  27. Flood Warning
  28. Flood Warning
  29. Flood Warning
  30. Severe Thunderstorm Warning
  31. Severe Thunderstorm Warning
  32. Severe Thunderstorm Warning
  33. Severe Thunderstorm Warning
  34. Severe Thunderstorm Warning
  35. Severe Thunderstorm Warning
  36. Freeze Warning
  37. Flood Warning
  38. Flood Warning
  39. Flood Warning
  40. Flood Warning
  41. Flood Warning
  42. Tornado Warning
  43. Severe Thunderstorm Warning
  44. Severe Thunderstorm Warning
  45. Tornado Warning
  46. Flood Warning
  47. Tornado Warning
  48. Severe Thunderstorm Warning
  49. Severe Thunderstorm Warning
  50. Tornado Warning
  51. Severe Thunderstorm Warning
  52. Flood Warning
  53. Flood Warning
  54. Flood Warning
  55. Severe Thunderstorm Warning
  56. Severe Thunderstorm Warning
  57. Severe Thunderstorm Warning
  58. Severe Thunderstorm Warning
  59. Severe Thunderstorm Warning
  60. Severe Thunderstorm Warning

And 16 earlier warnings.

Every alert, most recent first
  1. Flood Watch
  2. Flood Warning
  3. Flood Warning
  4. Severe Thunderstorm Warning
  5. Flash Flood Warning
  6. Flood Watch
  7. Flood Watch
  8. Dense Fog Advisory
  9. Extreme Heat Warning
  10. Heat Advisory
  11. Tornado Warning
  12. Flood Warning
  13. Flood Watch
  14. Flood Watch
  15. Flash Flood Warning
  16. Flood Warning
  17. Flood Warning
  18. Flood Watch
  19. Flash Flood Warning
  20. Severe Thunderstorm Warning
  21. Flood Watch
  22. Severe Thunderstorm Watch
  23. Dense Fog Advisory
  24. Severe Thunderstorm Watch
  25. Heat Advisory
  26. Severe Thunderstorm Watch
  27. Heat Advisory
  28. Severe Thunderstorm Watch
  29. Flood Watch
  30. Extreme Heat Watch
  31. Extreme Heat Warning
  32. Tornado Watch
  33. Heat Advisory
  34. Severe Thunderstorm Warning
  35. Heat Advisory
  36. Flood Warning
  37. Flood Watch
  38. Flood Watch
  39. Severe Thunderstorm Watch
  40. Flood Watch

The 40 most recent of 160.

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 Louisa County, with what is in force in each.

What this means

Warning
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.