Alert archive / Iowa / River Flood Warnings in 2026
River Flood Warning 10, NWS Des Moines, IA
NWS Des Moines, IA issued this river flood warning at Jul 4, 2026, 6:39 AM CDT for Jasper County, Marion County, Polk County, Iowa. It took effect at Jul 4, 2026, 9:00 AM CDT. It was in force for 4 days.
The area
The counties it named.
The facts
- Issued
- Jul 4, 2026, 6:39 AM CDT (11:39 UTC)
- In effect from
- Jul 4, 2026, 9:00 AM CDT
- Expired
- Jul 8, 2026, 7:46 AM CDT
- In force
- 4 days
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- Moderate
Counties Jasper County, IA, Marion County, IA, Polk County, IA
The radar
The Des Moines radar (KDMX), 44 km from the middle of the area, began a volume at 11:40 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 river
Written for the forecast point South Skunk River at Colfax (CFXI4). The gauge peaked at 19.46 ft at Jul 6, 2026, 4:00 PM CDT.
- Action stage
- 15 ft
- Minor stage
- 18 ft
- Moderate stage
- 19 ft
- Major stage
- 21 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 05471050, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Des Moines, IA wrote its last area forecast discussion before this river flood warning went out at Jul 4, 6:36 AM CDT, 3 minutes earlier.
Area forecast discussion, Jul 4, 6:36 AM CDT, 3 minutes before
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</html>Hazardous weather outlook, Jul 3, 4:06 PM CDT, 14 hours 33 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 406 PM CDT Fri Jul 3 2026 IAZ004>007-015>017-092>097-042115- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis- 406 PM CDT Fri Jul 3 2026 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight There is a chance for showers and storms this evening into the overnight hours. There is a Slight risk for severe weather for most of the area for storms arriving tonight, and an Enhanced Risk in the far west. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Additional storm chances return Saturday night. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight. IAZ023>028-033>039-044>050-057>062-070>075-081>086-042115- Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun- Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene- Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper- Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union- Clarke-Lucas-Monroe-Wapello- 406 PM CDT Fri Jul 3 2026 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight A flood watch is in effect for the area tonight. Please refer to the National Weather Service website at weather.gov/desmoines for further details. There is a chance for showers and storms this evening into the overnight hours. There is a Slight risk for severe weather for most of the area for storms arriving tonight, and an Enhanced Risk in the far west. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Additional storm chances return Saturday night. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed tonight.
In the hours before
Local storm report, Jul 4, 2:48 AM CDT, 3 hours 51 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
248 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 AM Tstm Wnd Gst 2 SSW Knoxville 41.30N 93.11W
07/04/2026 M62 MPH Marion IA AWOS
&&
MDLocal storm report, Jul 4, 3:06 AM CDT, 3 hours 33 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
306 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0258 AM Tstm Wnd Gst 3 ENE Searsboro 41.60N 92.65W
07/04/2026 M59 MPH Poweshiek IA Mesonet
PWS gust.
&&
MDLocal storm report, Jul 4, 3:21 AM CDT, 3 hours 18 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
321 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 AM Flash Flood 1 NE Newton 41.70N 93.03W
07/04/2026 Jasper IA Public
Street flooded and storm drainage
overflowing.
&&
MDLocal storm report, Jul 4, 3:26 AM CDT, 3 hours 13 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
326 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0323 AM Flash Flood 3 WNW Mitchellville 41.68N 93.40W
07/04/2026 Polk IA Broadcast Media
State radio relayed flooded interstate.
&&
MDLocal storm report, Jul 4, 3:27 AM CDT, 3 hours 12 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
327 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0326 AM Flash Flood 3 ESE Ames 42.00N 93.57W
07/04/2026 Story IA Broadcast Media
State radio relayed flooded on-ramp.
&&
MDLocal storm report, Jul 4, 3:40 AM CDT, 2 hours 59 minutes before
Preliminary Local Storm Report
National Weather Service Des Moines IA
340 AM CDT Sat Jul 4 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0334 AM Flash Flood 2 N Ames 42.05N 93.62W
07/04/2026 Story IA Public
Roads flooded and people stranded.
&&
MDThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 8:01 PM CDT | Special Weather Statement | DMX | Wapello | 29 min |
| Jul 4, 12:41 AM CDT | Flash Flood Warning | DMX | Marshall, Story | 6 hr |
| Jul 4, 1:27 AM CDT | River Flood Warning | DMX | Black Hawk | 42 hr |
| Jul 4, 1:46 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 29 min |
| Jul 4, 2:15 AM CDT | Severe Thunderstorm Warning | DMX | Polk, Warren | 45 min |
| Jul 4, 2:18 AM CDT | Flash Flood Warning | DMX | Jasper, Marshall, Story | 4 hr |
| Jul 4, 2:26 AM CDT | Flash Flood Warning | DMX | Boone, Dallas, Hamilton, Jasper, Polk, Story and 1 more | 4 hr |
| Jul 4, 2:41 AM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe, Warren | 49 min |
| Jul 4, 3:04 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek | 56 min |
| Jul 4, 3:15 AM CDT | Flash Flood Warning | DMX | Calhoun, Carroll, Greene, Sac | 6 hr |
| Jul 4, 3:25 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Lucas, Mahaska, Monroe, Wapello | 50 min |
| Jul 4, 4:17 AM CDT | River Flood Warning | DMX | Story | 24 hr |
| Jul 4, 4:51 AM CDT | River Flood Warning | DMX | Story | 14 hr |
| Jul 4, 4:51 AM CDT | River Flood Warning | DMX | Polk, Story | 27 hr |
| Jul 4, 6:21 AM CDT | Areal Flood Warning | DMX | Boone, Jasper, Marshall, Polk, Story | 9 hr |
| Jul 4, 12:45 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 30 min |
Nearby
River Flood Warnings in Iowa, 2026Every river 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.