Flash Flood Watches in Iowa
566 flash flood watches since 1986. 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 since 1986. Tap one for its archive.
- Flash Flood Watches
- 566
- Busiest year
- 201081 flash flood watches
- Average year
- 35over 16 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Van Buren County109
- Henry County107
- Jefferson County107
- Lee County106
- Louisa County106
- Washington County106
- Decatur County105
- Lucas County104
- Des Moines County104
- Keokuk County104
- Clarke County103
- Ringgold County103
- Appanoose County102
- Madison County102
- Monroe County102
- Taylor County102
- Wayne County102
- Muscatine County102
- Marion County101
- Scott County101
- Davis County100
- Mahaska County100
- Wapello County100
- Johnson County100
- Warren County98
- Cedar County98
- Adair County97
- Union County97
- Iowa County97
- Polk County97
- Adams County94
- Dallas County94
- Clinton County93
- Jasper County93
- Poweshiek County93
- Linn County92
- Guthrie County90
- Jones County90
- Cass County89
- Dubuque County89
59 more counties
- Benton County89
- Delaware County88
- Buchanan County87
- Audubon County87
- Jackson County87
- Story County87
- Boone County86
- Tama County86
- Marshall County84
- Hamilton County79
- Webster County78
- Black Hawk County78
- Greene County78
- Carroll County77
- Grundy County76
- Bremer County75
- Butler County73
- Crawford County73
- Fremont County73
- Hardin County73
- Calhoun County71
- Wright County71
- Page County69
- Franklin County68
- Humboldt County67
- Pocahontas County66
- Sac County66
- Montgomery County66
- Clayton County65
- Cerro Gordo County63
- Fayette County63
- Mills County61
- Floyd County60
- Mitchell County59
- Chickasaw County59
- Hancock County58
- Winnebago County58
- Worth County57
- Allamakee County57
- Winneshiek County57
- Emmet County56
- Kossuth County56
- Palo Alto County56
- Howard County56
- Osceola County55
- Clay County54
- Plymouth County54
- Pottawattamie County54
- O'Brien County53
- Dickinson County52
- Sioux County52
- Cherokee County51
- Woodbury County50
- Buena Vista County49
- Ida County49
- Harrison County49
- Shelby County49
- Monona County45
- Lyon County44
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. Rebuilt daily.