Alert archive / Iowa / 2021
Weather alerts in Iowa, May 2021
69 weather alerts in May 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 May 2021. Tap one for its archive.
- Alerts
- 69
- Warnings
- 14
- Watches
- 1
- Advisories
- 21
- Busiest day
- May 3, 202112 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 |
|---|---|---|---|---|
| May 1, 3:09 AM CDT | Red Flag Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 4 more | 16 hr |
| May 1, 3:26 AM CDT | Wind Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more | 16 hr |
| May 1, 3:57 AM CDT | Red Flag Warning | DMX | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 24 more | 15 hr |
| May 1, 10:01 AM CDT | Red Flag Warning | OAX | Harrison, Mills, Monona, Pottawattamie, Shelby | 10 hr |
| May 1, 10:24 AM CDT | Red Flag Warning | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 10 hr |
| May 2, 4:20 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clay and 18 more | 115 min |
| May 2, 6:55 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 50 min |
| May 2, 7:21 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 39 min |
| May 2, 7:42 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 48 min |
| May 2, 8:07 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 28 min |
| May 2, 9:14 PM CDT | Areal Flood Advisory | OAX | Monona | 3 hr |
| May 2, 9:38 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 28 min |
| May 2, 10:41 PM CDT | Special Weather Statement | OAX | Harrison, Mills, Pottawattamie | 34 min |
| May 2, 11:05 PM CDT | Special Weather Statement | OAX | Harrison, Mills, Pottawattamie | 10 min |
| May 2, 11:18 PM CDT | Special Weather Statement | OAX | Harrison, Shelby | 42 min |
| May 2, 11:43 PM CDT | Special Weather Statement | OAX | Mills, Pottawattamie, Shelby | 47 min |
| May 3, 1:33 PM CDT | Special Weather Statement | DVN | Henry, Lee, Van Buren | 42 min |
| May 3, 2:08 PM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Lee, Louisa, Van Buren | 67 min |
| May 3, 2:20 PM CDT | Special Weather Statement | DVN | Des Moines, Henry, Lee | 40 min |
| May 5, 2:24 PM CDT | Frost Advisory | FSD | Lyon | 18 hr |
| May 7, 1:37 PM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 18 hr |
| May 7, 1:48 PM CDT | Frost Advisory | DVN | Buchanan, Clinton, Delaware, Dubuque, Jackson, Jones | 18 hr |
| May 8, 6:42 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Page | 6 hr |
| May 10, 1:52 PM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 18 hr |
| May 10, 2:14 PM CDT | Frost Advisory | DMX | Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Emmet and 14 more | 18 hr |
| May 10, 2:28 PM CDT | Frost Advisory | DVN | Benton, Buchanan, Delaware, Dubuque, Jackson, Jones and 1 more | 18 hr |
| May 10, 3:12 PM CDT | Frost Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 17 hr |
| May 10, 3:24 PM CDT | Frost Advisory | OAX | Monona | 17 hr |
| May 11, 1:45 PM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 18 hr |
| May 11, 2:26 PM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 13 more | 17 hr |
| May 11, 2:32 PM CDT | Frost Advisory | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 5 more | 16 hr |
| May 14, 4:58 PM CDT | Mesoscale Discussion | SPC | Lyon | 92 min |
| May 15, 1:16 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 37 more | 119 min |
| May 15, 1:17 PM CDT | Special Weather Statement | DMX | Kossuth | 58 min |
| May 15, 2:29 PM CDT | Special Weather Statement | DMX | Hancock | 46 min |
| May 15, 3:21 PM CDT | Special Weather Statement | DMX | Franklin | 24 min |
| May 15, 4:47 PM CDT | Special Weather Statement | ARX | Fayette | 28 min |
| May 15, 4:50 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 40 min |
| May 16, 3:13 AM CDT | Dense Fog Advisory | DMX | Appanoose, Boone, Cerro Gordo, Clarke, Dallas, Davis and 30 more | 5 hr |
| May 19, 1:59 AM CDT | Dense Fog Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 7 hr |
| May 19, 2:45 AM CDT | Dense Fog Advisory | OAX | Harrison, Monona, Shelby | 5 hr |
| May 19, 6:20 PM CDT | Special Weather Statement | DMX | Winnebago | 25 min |
| May 20, 9:05 PM CDT | Mesoscale Discussion | SPC | Adair, Allamakee, Black Hawk, Boone, Bremer, Buchanan and 27 more | 115 min |
| May 20, 9:39 PM CDT | Tornado Warning | DMX | Boone, Dallas | 22 min |
| May 23, 5:35 PM CDT | Special Weather Statement | DVN | Linn | 40 min |
| May 25, 5:46 PM CDT | Special Weather Statement | OAX | Pottawattamie | 29 min |
| May 25, 6:46 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin, Wright | 44 min |
| May 25, 7:00 PM CDT | Special Weather Statement | OAX | Pottawattamie | 30 min |
| May 25, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie | 40 min |
| May 25, 7:40 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Cass, Dallas and 7 more | 95 min |
| May 25, 8:42 PM CDT | Special Weather Statement | ARX | Winneshiek | 33 min |
| May 25, 9:01 PM CDT | Special Weather Statement | ARX | Allamakee | 29 min |
| May 25, 11:14 PM CDT | Special Weather Statement | DMX | Adair, Madison | 46 min |
| May 25, 11:26 PM CDT | Special Weather Statement | DVN | Benton, Linn | 34 min |
| May 25, 11:53 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 31 min |
| May 26, 12:03 AM CDT | Special Weather Statement | DVN | Jones, Linn | 27 min |
| May 26, 1:33 AM CDT | Special Weather Statement | DVN | Keokuk | 42 min |
| May 26, 2:05 AM CDT | Special Weather Statement | DVN | Washington | 25 min |
| May 26, 3:07 AM CDT | Special Weather Statement | DVN | Louisa | 38 min |
| May 27, 7:43 PM CDT | Special Weather Statement | DVN | Van Buren | 32 min |
| May 27, 7:58 PM CDT | Special Weather Statement | DVN | Van Buren | 32 min |
| May 27, 8:14 PM CDT | Special Weather Statement | DVN | Van Buren | 61 min |
| May 27, 9:07 PM CDT | Special Weather Statement | DVN | Lee | 53 min |
| May 28, 3:30 AM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more | 28 hr |
| May 28, 10:36 AM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 20 hr |
| May 28, 2:11 PM CDT | Frost Advisory | FSD | Dickinson | 17 hr |
| May 28, 2:58 PM CDT | Frost Advisory | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 14 more | 16 hr |
| May 31, 2:46 AM CDT | Dense Fog Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 4 more | 6 hr |
| May 31, 2:33 PM CDT | Special Weather Statement | DMX | Kossuth | 57 min |
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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 27 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Cold | |
| Frost Advisory | 15 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Franklin County10
- Harrison County9
- Fayette County9
- Cerro Gordo County8
- Hamilton County8
- Hancock County8
- Hardin County8
- Kossuth County8
- Worth County8
- Wright County8
- Allamakee County8
- Chickasaw County8
- Floyd County8
- Howard County8
- Mitchell County8
- Winneshiek County8
- Linn County7
- Boone County7
- Bremer County7
- Butler County7
- Dallas County7
- Grundy County7
- Winnebago County7
- Pottawattamie County7
- Clay County6
- Dickinson County6
- Buchanan County6
- Jones County6
- Black Hawk County6
- Emmet County6
- Humboldt County6
- Story County6
- Monona County6
- Clayton County6
- Buena Vista County5
- Ida County5
- O'Brien County5
- Osceola County5
- Benton County5
- Delaware County5
58 more counties
- Dubuque County5
- Jackson County5
- Adair County5
- Greene County5
- Guthrie County5
- Palo Alto County5
- Webster County5
- Shelby County5
- Van Buren County5
- Lyon County5
- Marshall County5
- Tama County5
- Jasper County5
- Madison County5
- Polk County5
- Cherokee County4
- Plymouth County4
- Sioux County4
- Clinton County4
- Louisa County4
- Mills County4
- Henry County4
- Lee County4
- Woodbury County3
- Cedar County3
- Iowa County3
- Johnson County3
- Keokuk County3
- Muscatine County3
- Scott County3
- Washington County3
- Audubon County3
- Calhoun County3
- Cass County3
- Pocahontas County3
- Sac County3
- Des Moines County3
- Poweshiek County3
- Marion County3
- Warren County3
- Carroll County2
- Crawford County2
- Fremont County1
- Page County1
- Jefferson County1
- Appanoose County1
- Clarke County1
- Davis County1
- Decatur County1
- Lucas County1
- Mahaska County1
- Monroe County1
- Ringgold County1
- Union County1
- Wapello County1
- Wayne County1
- Adams County1
- Montgomery 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.