Weather alerts in Iowa, 2021
1,495 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 1,495
- Warnings
- 611
- Watches
- 105
- Advisories
- 290
- Busiest month
- August372 alerts
- Busiest day
- July 14, 202160 alerts
Over time
By month
The alerts
1,495 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pottawattamie County144
- Buchanan County135
- Benton County132
- Mills County127
- Delaware County127
- Allamakee County126
- Linn County126
- Harrison County124
- Howard County122
- Dubuque County122
- Lyon County116
- Chickasaw County116
- Winneshiek County116
- Lee County115
- Jones County115
- Des Moines County113
- Van Buren County113
- Cerro Gordo County113
- Jackson County112
- Fremont County111
- Page County111
- Fayette County110
- Black Hawk County110
- Boone County110
- Adair County109
- Madison County109
- Iowa County109
- Webster County108
- Montgomery County108
- Greene County108
- Washington County108
- Franklin County107
- Monona County107
- Bremer County107
- Butler County107
- Dallas County107
- Osceola County106
- Hardin County106
- Clayton County106
- Guthrie County106
59 more counties
- Story County106
- Calhoun County105
- Hamilton County105
- Mitchell County105
- Clarke County105
- Henry County104
- Sioux County104
- Hancock County104
- Shelby County104
- Floyd County104
- Ringgold County104
- Union County104
- Johnson County104
- Scott County104
- Polk County103
- Clinton County103
- Carroll County102
- Keokuk County102
- Decatur County101
- Grundy County101
- Louisa County100
- Worth County100
- Warren County100
- Jefferson County100
- Adams County99
- Audubon County99
- Cass County99
- Plymouth County98
- Humboldt County97
- Wright County97
- Tama County97
- Cedar County97
- O'Brien County96
- Clay County95
- Kossuth County95
- Taylor County95
- Buena Vista County94
- Winnebago County94
- Marshall County94
- Crawford County93
- Jasper County93
- Sac County92
- Lucas County92
- Muscatine County92
- Ida County91
- Cherokee County90
- Woodbury County90
- Pocahontas County90
- Poweshiek County90
- Palo Alto County89
- Wayne County89
- Dickinson County88
- Emmet County88
- Marion County87
- Davis County82
- Appanoose County81
- Monroe County79
- Mahaska County78
- Wapello County76
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.