Alert archive / Iowa / Flash Flood Warnings in 2026
Flash Flood Warning 4, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 5, 2026, 11:23 PM CDT for 6 counties in Iowa. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 5, 2026, 11:23 PM CDT (04:23 UTC)
- Expired
- Jun 6, 2026, 3:11 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adair County, IA, Adams County, IA, Cass County, IA, Clarke County, IA, Madison County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 98 km from the middle of the area, began a volume at 04:26 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.4 hours before the alert went out and 146 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1542 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1674 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
673
WGUS53 KDMX 060423
FFWDMX
IAC001-003-029-039-121-175-061030-
/O.NEW.KDMX.FF.W.0004.260606T0423Z-260606T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Des Moines IA
1123 PM CDT Fri Jun 5 2026
The National Weather Service in Des Moines has issued a
* Flash Flood Warning for...
Northwestern Clarke County in south central Iowa...
Southwestern Madison County in south central Iowa...
Northern Union County in south central Iowa...
Southern Adair County in southwestern Iowa...
Northern Adams County in southwestern Iowa...
Southeastern Cass County in southwestern Iowa...
* Until 530 AM CDT Saturday.
* At 1123 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Additional rainfall amounts of 1 to 3 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...
Creston, Greenfield, Green Valley Lake, Lake Icaria, Fontanelle,
Orient, Lorimor, Massena, Cumberland, Bridgewater, East Peru,
Macksburg, Cromwell, Green Valley Lake State Park, Nodaway Park,
Greenfield Municipal Airport and Lake Icaria State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
For the latest stream observations and forecasts refer to
weather.gov/desmoines/water.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4126 9493 4134 9446 4126 9392 4106 9392
4103 9447 4109 9493 4112 9493 4114 9493
4116 9493
FLASH FLOOD...RADAR INDICATED
$$
Dodson3 follow-up statements
970
WGUS73 KDMX 060445
FFSDMX
Flash Flood Statement
National Weather Service Des Moines IA
1145 PM CDT Fri Jun 5 2026
IAC001-003-029-039-121-175-061030-
/O.CON.KDMX.FF.W.0004.000000T0000Z-260606T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adair IA-Adams IA-Cass IA-Clarke IA-Madison IA-Union IA-
1145 PM CDT Fri Jun 5 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT SATURDAY
FOR NORTHWESTERN CLARKE, SOUTHWESTERN MADISON, NORTHERN UNION,
SOUTHERN ADAIR, NORTHERN ADAMS AND SOUTHEASTERN CASS COUNTIES...
At 1145 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 5 inches of rain
have fallen. Additional rainfall amounts of 1 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Creston, Greenfield, Green Valley Lake, Lake Icaria, Fontanelle,
Orient, Lorimor, Massena, Cumberland, Bridgewater, East Peru,
Macksburg, Cromwell, Green Valley Lake State Park, Nodaway Park,
Greenfield Municipal Airport and Lake Icaria State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
For the latest stream observations and forecasts refer to
weather.gov/desmoines/water.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4126 9493 4134 9446 4126 9392 4106 9392
4103 9447 4109 9493 4112 9493 4114 9493
4116 9493
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Dodson632
WGUS73 KDMX 060621 RRA
FFSDMX
Flash Flood Statement
National Weather Service Des Moines IA
121 AM CDT Sat Jun 6 2026
IAC001-003-029-039-121-175-061030-
/O.CON.KDMX.FF.W.0004.000000T0000Z-260606T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adair IA-Adams IA-Cass IA-Clarke IA-Madison IA-Union IA-
121 AM CDT Sat Jun 6 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT EARLY THIS
MORNING FOR NORTHWESTERN CLARKE, SOUTHWESTERN MADISON, NORTHERN
UNION, SOUTHERN ADAIR, NORTHERN ADAMS AND SOUTHEASTERN CASS
COUNTIES...
At 121 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. Additional rainfall amounts up to 0.5 inch are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Creston, Greenfield, Green Valley Lake, Lake Icaria, Fontanelle,
Orient, Lorimor, Massena, Cumberland, Bridgewater, East Peru,
Macksburg, Cromwell, Green Valley Lake State Park, Nodaway Park,
Greenfield Municipal Airport and Lake Icaria State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
For the latest stream observations and forecasts refer to
weather.gov/desmoines/water.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4126 9493 4134 9446 4126 9392 4106 9392
4103 9447 4109 9493 4112 9493 4114 9493
4116 9493
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Dodson272
WGUS73 KDMX 060811 RRA
FFSDMX
Flash Flood Statement
National Weather Service Des Moines IA
311 AM CDT Sat Jun 6 2026
IAC001-003-029-039-121-175-060821-
/O.CAN.KDMX.FF.W.0004.000000T0000Z-260606T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adair IA-Adams IA-Cass IA-Clarke IA-Madison IA-Union IA-
311 AM CDT Sat Jun 6 2026
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN CLARKE,
SOUTHWESTERN MADISON, NORTHERN UNION, SOUTHERN ADAIR, NORTHERN ADAMS
AND SOUTHEASTERN CASS COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 700 AM CDT for portions of
south central, southeast, and southwest Iowa.
&&
LAT...LON 4126 9493 4134 9446 4126 9392 4106 9392
4103 9447 4109 9493 4112 9493 4114 9493
4116 9493
$$
DodsonThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 9:15 PM CDT | Special Weather Statement | DMX | Marion | 30 min |
| Jun 5, 9:27 PM CDT | Severe Thunderstorm Warning | DMX | Marion, Warren | 48 min |
| Jun 5, 9:33 PM CDT | Tornado Warning | DMX | Marion, Warren | 42 min |
| Jun 5, 9:41 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Madison, Union | 64 min |
| Jun 5, 9:50 PM CDT | Tornado Warning | DMX | Clarke, Madison, Union | 29 min |
| Jun 5, 9:59 PM CDT | Tornado Warning | DMX | Adair, Adams, Cass | 46 min |
| Jun 5, 10:09 PM CDT | Tornado Warning | DMX | Marion, Warren | 45 min |
| Jun 5, 10:18 PM CDT | Severe Thunderstorm Warning | DMX | Marion, Warren | 57 min |
| Jun 5, 10:41 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass | 64 min |
| Jun 5, 10:44 PM CDT | Flash Flood Warning | DMX | Marion, Warren | 4 hr |
| Jun 5, 10:53 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 67 min |
| Jun 5, 10:59 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 61 min |
| Jun 5, 11:02 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Clarke, Madison, Union | 32 min |
| Jun 5, 11:11 PM CDT | Tornado Warning | DMX | Cass | 20 min |
| Jun 5, 11:25 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe | 65 min |
| Jun 5, 11:28 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 47 min |
| Jun 5, 11:38 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Union | 67 min |
| Jun 5, 11:42 PM CDT | Flash Flood Warning | DMX | Marion | 3 hr |
| Jun 5, 11:50 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Marion, Warren | 55 min |
| Jun 6, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe, Wapello | 59 min |
| Jun 6, 12:42 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Lucas, Monroe, Wayne | 78 min |
| Jun 6, 1:33 AM CDT | Flash Flood Warning | DMX | Appanoose, Lucas, Marion, Monroe, Wayne | 5 hr |
| Jun 6, 12:59 PM CDT | Areal Flood Warning | DMX | Marion | 20 hr |
Nearby
Flash Flood Warnings in Iowa, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.