Alert archive / Iowa / 2021
Weather alerts in Iowa, April 2021
57 weather alerts in April 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 April 2021. Tap one for its archive.
- Alerts
- 57
- Warnings
- 22
- Watches
- 5
- Advisories
- 7
- Busiest day
- April 5, 202110 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 |
|---|---|---|---|---|
| Apr 1, 3:53 PM CDT | Fire Weather Watch | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 12 hr |
| Apr 2, 3:29 AM CDT | Red Flag Warning | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 17 hr |
| Apr 2, 10:49 AM CDT | Red Flag Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 9 hr |
| Apr 2, 10:50 AM CDT | Red Flag Warning | DMX | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more | 9 hr |
| Apr 2, 11:12 AM CDT | Red Flag Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 9 hr |
| Apr 4, 7:38 PM CDT | Special Weather Statement | ARX | Allamakee, Chickasaw, Clayton, Winneshiek | 52 min |
| Apr 4, 9:41 PM CDT | Special Weather Statement | ARX | Clayton | 49 min |
| Apr 4, 10:40 PM CDT | Special Weather Statement | ARX | Clayton | 35 min |
| Apr 5, 1:28 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 32 min |
| Apr 5, 2:08 AM CDT | Special Weather Statement | OAX | Harrison, Monona, Shelby | 52 min |
| Apr 5, 3:39 AM CDT | Special Weather Statement | OAX | Harrison, Pottawattamie | 51 min |
| Apr 5, 5:36 AM CDT | Special Weather Statement | DVN | Benton | 24 min |
| Apr 5, 5:58 AM CDT | Special Weather Statement | ARX | Chickasaw, Fayette, Floyd | 62 min |
| Apr 5, 6:28 AM CDT | Special Weather Statement | OAX | Harrison, Monona, Pottawattamie, Shelby | 47 min |
| Apr 5, 6:21 PM CDT | Mesoscale Discussion | SPC | Lyon, Sioux | 114 min |
| Apr 5, 9:27 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 33 min |
| Apr 5, 9:48 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 27 min |
| Apr 5, 10:07 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola | 53 min |
| Apr 6, 2:12 AM CDT | Special Weather Statement | ARX | Mitchell | 63 min |
| Apr 7, 1:55 PM CDT | Special Weather Statement | DMX | Ringgold | 35 min |
| Apr 7, 2:26 PM CDT | Special Weather Statement | DMX | Clarke, Decatur | 34 min |
| Apr 7, 2:52 PM CDT | Special Weather Statement | DMX | Madison | 23 min |
| Apr 7, 3:23 PM CDT | Special Weather Statement | DMX | Polk | 22 min |
| Apr 7, 5:04 PM CDT | Mesoscale Discussion | SPC | Davis, Des Moines, Henry, Jefferson, Lee, Louisa and 1 more | 116 min |
| Apr 7, 5:43 PM CDT | Special Weather Statement | DVN | Van Buren | 47 min |
| Apr 7, 6:44 PM CDT | Special Weather Statement | DVN | Henry, Iowa, Keokuk, Louisa, Washington | 46 min |
| Apr 7, 7:04 PM CDT | Special Weather Statement | DVN | Des Moines | 41 min |
| Apr 7, 8:10 PM CDT | Special Weather Statement | DVN | Cedar, Muscatine, Scott | 65 min |
| Apr 7, 9:13 PM CDT | Special Weather Statement | DVN | Buchanan, Clinton, Delaware, Dubuque, Jackson, Jones and 1 more | 62 min |
| Apr 10, 9:53 AM CDT | Wind Advisory | DVN | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more | 14 hr |
| Apr 10, 8:12 PM CDT | River Flood Warning | DVN | Clinton, Scott | 67 hr |
| Apr 11, 8:26 AM CDT | River Flood Warning | DVN | Des Moines, Henry, Lee | 31 hr |
| Apr 11, 11:34 AM CDT | Areal Flood Warning | DVN | Des Moines, Louisa | 6 hr |
| Apr 12, 11:03 AM CDT | River Flood Watch | DVN | Des Moines | 5 hr |
| Apr 13, 2:38 PM CDT | Freeze Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 17 hr |
| Apr 13, 2:47 PM CDT | Frost Advisory | DVN | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more | 17 hr |
| Apr 13, 2:51 PM CDT | Frost Advisory | DMX | Adair, Adams, Appanoose, Cass, Clarke, Davis and 12 more | 17 hr |
| Apr 14, 2:25 PM CDT | Freeze Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 18 hr |
| Apr 14, 2:45 PM CDT | Frost Advisory | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more | 17 hr |
| Apr 14, 3:14 PM CDT | Frost Advisory | DMX | Adair, Appanoose, Clarke, Davis, Decatur, Lucas and 9 more | 17 hr |
| Apr 14, 3:14 PM CDT | Freeze Warning | DMX | Adams, Cass, Taylor | 17 hr |
| Apr 19, 3:28 AM CDT | Freeze Watch | DMX | Adair, Adams, Appanoose, Cass, Clarke, Dallas and 18 more | 11 hr |
| Apr 19, 3:41 AM CDT | Freeze Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 10 hr |
| Apr 19, 3:55 AM CDT | Freeze Watch | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 11 hr |
| Apr 19, 2:07 PM CDT | Freeze Warning | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 43 hr |
| Apr 19, 2:29 PM CDT | Freeze Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 19 hr |
| Apr 19, 2:29 PM CDT | Freeze Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 43 hr |
| Apr 19, 2:56 PM CDT | Freeze Warning | DMX | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 21 more | 18 hr |
| Apr 19, 2:56 PM CDT | Freeze Warning | DMX | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 21 more | 42 hr |
| Apr 19, 11:47 PM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 5 more | 8 hr |
| Apr 21, 3:07 AM CDT | Freeze Warning | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 30 hr |
| Apr 21, 3:34 AM CDT | Freeze Warning | DMX | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 21 more | 29 hr |
| Apr 21, 3:36 AM CDT | Freeze Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 29 hr |
| Apr 24, 2:25 PM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 5 more | 18 hr |
| Apr 26, 10:56 PM CDT | Special Weather Statement | DMX | Emmet | 64 min |
| Apr 27, 12:02 AM CDT | Special Weather Statement | DMX | Emmet | 43 min |
| Apr 27, 8:24 PM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Hancock, Howard, Mitchell, Winnebago and 2 more | 2 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 | 4 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 2 |
| River Flood Watch | 1 |
| Cold | |
| Freeze Warning | 11 |
| Freeze Watch | 3 |
| Frost Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 1 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pottawattamie County11
- Des Moines County11
- Henry County9
- Louisa County9
- Fremont County8
- Mills County8
- Montgomery County8
- Page County8
- Clarke County8
- Decatur County8
- Madison County8
- Ringgold County8
- Lee County8
- Van Buren County8
- Iowa County8
- Cedar County8
- Adair County7
- Adams County7
- Cass County7
- Taylor County7
- Union County7
- Warren County7
- Davis County7
- Jefferson County7
- Keokuk County7
- Washington County7
- Scott County7
- Clinton County7
- Johnson County7
- Polk County6
- Benton County6
- Muscatine County6
- Buchanan County6
- Delaware County6
- Dubuque County6
- Jackson County6
- Jones County6
- Linn County6
- Appanoose County6
- Lucas County6
55 more counties
- Mahaska County6
- Marion County6
- Monroe County6
- Wapello County6
- Wayne County6
- Harrison County5
- Lyon County5
- Dallas County5
- Audubon County4
- Guthrie County4
- Story County4
- Jasper County4
- Marshall County4
- Poweshiek County4
- Tama County4
- Monona County3
- Shelby County3
- Emmet County3
- Chickasaw County3
- Mitchell County3
- Clayton County3
- O'Brien County2
- Osceola County2
- Sioux County2
- Cerro Gordo County2
- Hancock County2
- Winnebago County2
- Worth County2
- Floyd County2
- Howard County2
- Allamakee County2
- Winneshiek County2
- Buena Vista County1
- Cherokee County1
- Clay County1
- Dickinson County1
- Ida County1
- Plymouth County1
- Woodbury County1
- Boone County1
- Calhoun County1
- Carroll County1
- Crawford County1
- Franklin County1
- Greene County1
- Hamilton County1
- Hardin County1
- Humboldt County1
- Kossuth County1
- Palo Alto County1
- Pocahontas County1
- Sac County1
- Webster County1
- Wright County1
- Fayette 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.