Alert archive / Iowa / Flash Flood Warnings / 2018
Flash Flood Warnings in Iowa, September 2018
28 flash flood warnings in September 2018. 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 September 2018. Tap one for its archive.
- Flash Flood Warnings
- 28
- Busiest day
- September 2, 20188 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 |
|---|---|---|---|---|
| Sep 1, 3:29 AM CDT | Flash Flood Warning | DVN | Iowa | 8 hr |
| Sep 1, 3:35 AM CDT | Flash Flood Warning | DMX | Poweshiek, Tama | 6 hr |
| Sep 1, 4:16 AM CDT | Flash Flood Warning | DVN | Benton | 8 hr |
| Sep 1, 4:21 AM CDT | Flash Flood Warning | DMX | Clarke, Decatur | 5 hr |
| Sep 1, 4:38 AM CDT | Flash Flood Warning | DMX | Tama | 6 hr |
| Sep 1, 5:22 AM CDT | Flash Flood Warning | DMX | Ringgold, Union | 4 hr |
| Sep 1, 9:20 PM CDT | Flash Flood Warning | DMX | Boone, Dallas, Polk, Story | 6 hr |
| Sep 1, 9:59 PM CDT | Flash Flood Warning | DMX | Mahaska, Monroe, Wapello | 5 hr |
| Sep 1, 10:08 PM CDT | Flash Flood Warning | DVN | Keokuk | 5 hr |
| Sep 1, 10:16 PM CDT | Flash Flood Warning | DMX | Poweshiek | 6 hr |
| Sep 1, 10:47 PM CDT | Flash Flood Warning | DMX | Jasper, Poweshiek | 5 hr |
| Sep 1, 11:20 PM CDT | Flash Flood Warning | DVN | Iowa, Keokuk, Washington | 4 hr |
| Sep 2, 1:37 AM CDT | Flash Flood Warning | DMX | Marshall, Story | 2 hr |
| Sep 2, 1:34 PM CDT | Flash Flood Warning | DMX | Black Hawk, Bremer, Butler | 6 hr |
| Sep 2, 7:39 PM CDT | Flash Flood Warning | DVN | Muscatine | 2 hr |
| Sep 3, 7:43 PM CDT | Flash Flood Warning | DMX | Black Hawk | 3 hr |
| Sep 3, 9:17 PM CDT | Flash Flood Warning | ARX | Allamakee | 9 hr |
| Sep 3, 11:58 PM CDT | Flash Flood Warning | ARX | Allamakee, Clayton | 6 hr |
| Sep 4, 5:09 PM CDT | Flash Flood Warning | DMX | Hancock, Kossuth, Winnebago | 6 hr |
| Sep 5, 6:12 AM CDT | Flash Flood Warning | DMX | Franklin | 4 hr |
| Sep 5, 11:07 AM CDT | Flash Flood Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 4 hr |
| Sep 5, 12:08 PM CDT | Flash Flood Warning | DMX | Adams, Ringgold, Taylor, Union | 3 hr |
| Sep 5, 1:01 PM CDT | Flash Flood Warning | DVN | Benton, Iowa, Johnson, Linn | 6 hr |
| Sep 18, 10:48 AM CDT | Flash Flood Warning | FSD | Woodbury | 2 hr |
| Sep 19, 10:22 PM CDT | Flash Flood Warning | DMX | Franklin, Wright | 6 hr |
| Sep 20, 1:16 AM CDT | Flash Flood Warning | ARX | Clayton, Fayette | 3 hr |
| Sep 20, 4:35 AM CDT | Flash Flood Warning | FSD | Clay, Lyon, O'Brien, Osceola, Sioux | 5 hr |
| Sep 20, 9:30 AM CDT | Flash Flood Warning | FSD | Clay, Lyon, O'Brien, Osceola, Sioux | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Poweshiek County4
- Iowa County3
- Tama County2
- Benton County2
- Ringgold County2
- Union County2
- Story County2
- Mahaska County2
- Keokuk County2
- Jasper County2
- Black Hawk County2
- Allamakee County2
- Clayton County2
- Franklin County2
- Clay County2
- Lyon County2
- O'Brien County2
- Osceola County2
- Sioux County2
- Clarke County1
- Decatur County1
- Boone County1
- Dallas County1
- Polk County1
- Monroe County1
- Wapello County1
- Washington County1
- Marshall County1
- Bremer County1
- Butler County1
- Muscatine County1
- Hancock County1
- Kossuth County1
- Winnebago County1
- Marion County1
- Adams County1
- Taylor County1
- Johnson County1
- Linn County1
- Woodbury County1
2 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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. Rebuilt daily.