Alert archive / Iowa / Flash Flood Watches / 2018
Flash Flood Watches in Iowa, September 2018
16 flash flood watches 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 watches reaches back to 2005.
Flash Flood Watches by county
Each county as a circle sized by its count in September 2018. Tap one for its archive.
- Flash Flood Watches
- 16
- Busiest day
- September 4, 20184 flash flood watches
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, 3:44 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more | 24 hr |
| Sep 1, 4:38 AM CDT | Flash Flood Watch | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 34 more | 24 hr |
| Sep 1, 5:15 PM CDT | Flash Flood Watch | OAX | Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more | 44 hr |
| Sep 2, 9:26 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 39 hr |
| Sep 2, 9:45 AM CDT | Flash Flood Watch | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 30 more | 36 hr |
| Sep 3, 1:06 PM CDT | Flash Flood Watch | OAX | Fremont, Montgomery, Page | 45 hr |
| Sep 4, 3:33 AM CDT | Flash Flood Watch | DMX | Black Hawk, Boone, Bremer, Butler, Calhoun, Cerro Gordo and 22 more | 27 hr |
| Sep 4, 3:56 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more | 39 hr |
| Sep 4, 4:00 AM CDT | Flash Flood Watch | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 33 hr |
| Sep 4, 4:01 AM CDT | Flash Flood Watch | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 3 more | 17 hr |
| Sep 5, 7:12 AM CDT | Flash Flood Watch | DMX | Adair, Adams, Appanoose, Clarke, Davis, Decatur and 13 more | 20 hr |
| Sep 6, 2:38 PM CDT | Flash Flood Watch | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more | 36 hr |
| Sep 6, 3:01 PM CDT | Flash Flood Watch | DMX | Appanoose, Clarke, Davis, Decatur, Lucas, Mahaska and 5 more | 36 hr |
| Sep 19, 4:10 AM CDT | Flash Flood Watch | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 32 hr |
| Sep 19, 10:31 AM CDT | Flash Flood Watch | FSD | Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 4 more | 26 hr |
| Sep 19, 10:41 AM CDT | Flash Flood Watch | DMX | Bremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock and 7 more | 25 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Des Moines County4
- Henry County4
- Jefferson County4
- Keokuk County4
- Louisa County4
- Washington County4
- Appanoose County4
- Bremer County4
- Butler County4
- Clarke County4
- Davis County4
- Decatur County4
- Franklin County4
- Jasper County4
- Lucas County4
- Mahaska County4
- Marion County4
- Monroe County4
- Poweshiek County4
- Ringgold County4
- Wapello County4
- Wayne County4
- Benton County3
- Buchanan County3
- Cedar County3
- Clinton County3
- Delaware County3
- Dubuque County3
- Iowa County3
- Jackson County3
- Johnson County3
- Jones County3
- Linn County3
- Muscatine County3
- Scott County3
- Adair County3
- Adams County3
- Black Hawk County3
- Boone County3
- Dallas County3
57 more counties
- Grundy County3
- Hamilton County3
- Hardin County3
- Madison County3
- Marshall County3
- Polk County3
- Story County3
- Tama County3
- Taylor County3
- Union County3
- Warren County3
- Wright County3
- Audubon County2
- Calhoun County2
- Cass County2
- Greene County2
- Guthrie County2
- Webster County2
- Fremont County2
- Montgomery County2
- Page County2
- Lee County2
- Van Buren County2
- Cerro Gordo County2
- Emmet County2
- Hancock County2
- Humboldt County2
- Kossuth County2
- Palo Alto County2
- Pocahontas County2
- Winnebago County2
- Worth County2
- Allamakee County2
- Chickasaw County2
- Clayton County2
- Fayette County2
- Floyd County2
- Howard County2
- Mitchell County2
- Winneshiek County2
- Buena Vista County2
- Cherokee County2
- Clay County2
- Dickinson County2
- O'Brien County2
- Osceola County2
- Plymouth County2
- Woodbury County2
- Carroll County1
- Harrison County1
- Mills County1
- Pottawattamie County1
- Shelby County1
- Sac County1
- Ida County1
- Lyon County1
- Sioux County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.