Alert archive / Iowa / 2021
Weather alerts in Iowa, September 2021
44 weather alerts in September 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 September 2021. Tap one for its archive.
- Alerts
- 44
- Warnings
- 13
- Watches
- 1
- Advisories
- 1
- Busiest day
- September 20, 202117 alerts
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 7, 9:23 AM CDT | Special Weather Statement | ARX | Allamakee | 52 min |
| Sep 13, 4:59 AM CDT | Special Weather Statement | DVN | Buchanan | 61 min |
| Sep 13, 5:29 AM CDT | Special Weather Statement | DVN | Buchanan | 31 min |
| Sep 13, 5:59 AM CDT | Special Weather Statement | DVN | Dubuque | 31 min |
| Sep 13, 8:53 PM CDT | Special Weather Statement | OAX | Monona | 52 min |
| Sep 13, 9:23 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more | 97 min |
| Sep 13, 9:43 PM CDT | Special Weather Statement | OAX | Monona | 47 min |
| Sep 13, 10:02 PM CDT | Special Weather Statement | DMX | Crawford | 28 min |
| Sep 13, 10:18 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford | 27 min |
| Sep 14, 1:08 AM CDT | Special Weather Statement | DMX | Hamilton | 37 min |
| Sep 16, 6:23 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, O'Brien, Osceola, Sioux | 97 min |
| Sep 17, 12:29 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 46 min |
| Sep 17, 12:36 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 54 min |
| Sep 17, 12:53 AM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, O'Brien, Osceola, Sioux | 67 min |
| Sep 17, 1:11 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 2 more | 49 min |
| Sep 17, 1:23 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 67 min |
| Sep 17, 1:57 AM CDT | Special Weather Statement | OAX | Monona | 63 min |
| Sep 17, 2:07 AM CDT | Special Weather Statement | DMX | Emmet, Kossuth, Palo Alto | 53 min |
| Sep 17, 5:41 AM CDT | Special Weather Statement | OAX | Harrison, Monona | 64 min |
| Sep 17, 4:44 PM CDT | Special Weather Statement | DVN | Henry | 31 min |
| Sep 17, 5:20 PM CDT | Special Weather Statement | DVN | Lee | 25 min |
| Sep 17, 5:46 PM CDT | Special Weather Statement | DVN | Lee | 29 min |
| Sep 20, 12:38 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 49 more | 2 hr |
| Sep 20, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 56 more | 7 hr |
| Sep 20, 3:38 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Union, Warren | 52 min |
| Sep 20, 3:55 PM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer and 49 more | 95 min |
| Sep 20, 4:06 PM CDT | Special Weather Statement | ARX | Floyd | 24 min |
| Sep 20, 4:23 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Marion, Warren | 52 min |
| Sep 20, 4:25 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 50 min |
| Sep 20, 4:57 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Marion, Monroe, Warren | 48 min |
| Sep 20, 5:06 PM CDT | Special Weather Statement | ARX | Winneshiek | 24 min |
| Sep 20, 5:50 PM CDT | Special Weather Statement | DVN | Keokuk | 25 min |
| Sep 20, 5:52 PM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 30 more | 113 min |
| Sep 20, 6:16 PM CDT | Special Weather Statement | DVN | Washington | 29 min |
| Sep 20, 6:26 PM CDT | Special Weather Statement | DVN | Buchanan | 34 min |
| Sep 20, 6:28 PM CDT | Special Weather Statement | DVN | Benton, Linn | 32 min |
| Sep 20, 6:34 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Wayne | 41 min |
| Sep 20, 6:34 PM CDT | Special Weather Statement | DVN | Keokuk | 26 min |
| Sep 20, 6:52 PM CDT | Severe Thunderstorm Warning | DVN | Delaware | 38 min |
| Sep 20, 7:10 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 35 min |
| Sep 20, 7:13 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Keokuk, Washington | 47 min |
| Sep 20, 7:53 PM CDT | Special Weather Statement | DVN | Louisa | 52 min |
| Sep 20, 8:52 PM CDT | Special Weather Statement | DVN | Scott | 23 min |
| Sep 30, 4:13 AM CDT | Areal Flood Advisory | OAX | Pottawattamie, Shelby | 6 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 13 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 23 |
| Flooding | |
| Areal Flood Advisory | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Buchanan County7
- Keokuk County7
- Warren County7
- Sioux County6
- Clarke County6
- Davis County6
- Lucas County6
- Marion County6
- Washington County6
- Allamakee County5
- Dubuque County5
- Monona County5
- Butler County5
- Grundy County5
- Hamilton County5
- O'Brien County5
- Appanoose County5
- Benton County5
- Chickasaw County5
- Delaware County5
- Floyd County5
- Howard County5
- Linn County5
- Monroe County5
- Wayne County5
- Winneshiek County5
- Boone County4
- Cerro Gordo County4
- Dallas County4
- Franklin County4
- Hancock County4
- Hardin County4
- Polk County4
- Story County4
- Wright County4
- Dickinson County4
- Osceola County4
- Clay County4
- Black Hawk County4
- Bremer County4
50 more counties
- Clayton County4
- Decatur County4
- Fayette County4
- Iowa County4
- Jasper County4
- Johnson County4
- Jones County4
- Madison County4
- Mahaska County4
- Marshall County4
- Mitchell County4
- Poweshiek County4
- Tama County4
- Union County4
- Wapello County4
- Jefferson County4
- Crawford County3
- Lyon County3
- Ringgold County3
- Winnebago County3
- Worth County3
- Buena Vista County2
- Carroll County2
- Greene County2
- Guthrie County2
- Harrison County2
- Humboldt County2
- Ida County2
- Kossuth County2
- Palo Alto County2
- Pottawattamie County2
- Shelby County2
- Webster County2
- Woodbury County2
- Plymouth County2
- Emmet County2
- Henry County2
- Lee County2
- Adair County2
- Adams County2
- Taylor County2
- Cedar County2
- Van Buren County2
- Audubon County1
- Calhoun County1
- Pocahontas County1
- Sac County1
- Cherokee County1
- Louisa County1
- Scott County1
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.