Alert archive / Iowa / Flash Flood Warnings / 2026
Flash Flood Warnings in Iowa, July 2026
18 flash flood warnings in July 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in July 2026. Tap one for its archive.
- Flash Flood Warnings
- 18
- Busiest day
- July 3, 20265 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:58 PM CDT | Flash Flood Warning | DMX | Black Hawk, Grundy, Marshall, Tama | 6 hr |
| Jul 2, 8:13 PM CDT | Flash Flood Warning | DMX | Polk, Story | 6 hr |
| Jul 2, 11:16 PM CDT | Flash Flood Warning | DMX | Jasper, Polk | 6 hr |
| Jul 3, 1:01 AM CDT | Flash Flood Warning | DMX | Polk | 4 hr |
| Jul 3, 2:14 AM CDT | Flash Flood Warning | FSD | Woodbury | 3 hr |
| Jul 3, 4:32 AM CDT | Flash Flood Warning | DMX | Story | 6 hr |
| Jul 3, 7:50 PM CDT | Flash Flood Warning | DVN | Scott | 3 hr |
| Jul 4, 12:41 AM CDT | Flash Flood Warning | DMX | Marshall, Story | 6 hr |
| 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, 3:15 AM CDT | Flash Flood Warning | DMX | Calhoun, Carroll, Greene, Sac | 6 hr |
| Jul 8, 5:33 PM CDT | Flash Flood Warning | ARX | Howard, Mitchell | 3 hr |
| Jul 8, 7:27 PM CDT | Flash Flood Warning | ARX | Floyd, Mitchell | 3 hr |
| Jul 8, 7:29 PM CDT | Flash Flood Warning | DMX | Cerro Gordo, Worth | 6 hr |
| Jul 20, 11:36 AM CDT | Flash Flood Warning | DVN | Cedar, Muscatine, Scott | 3 hr |
| Jul 20, 7:35 PM CDT | Flash Flood Warning | DMX | Boone, Jasper, Marshall, Polk, Story | 6 hr |
| Jul 20, 8:18 PM CDT | Flash Flood Warning | DMX | Jasper, Polk | 6 hr |
| Jul 20, 9:07 PM CDT | Flash Flood Warning | DMX | Dallas, Polk | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Polk County7
- Story County6
- Jasper County5
- Marshall County4
- Scott County2
- Boone County2
- Dallas County2
- Mitchell County2
- Black Hawk County1
- Grundy County1
- Tama County1
- Woodbury County1
- Hamilton County1
- Webster County1
- Calhoun County1
- Carroll County1
- Greene County1
- Sac County1
- Howard County1
- Floyd County1
- Cerro Gordo County1
- Worth County1
- Cedar County1
- Muscatine County1
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.