Alert archive / Iowa / 2020
Weather alerts in Iowa, August 2020
149 weather alerts in August 2020, 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 August 2020. Tap one for its archive.
- Alerts
- 149
- Warnings
- 54
- Watches
- 6
- Advisories
- 9
- Busiest day
- August 10, 202057 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 |
|---|---|---|---|---|
| Aug 1, 4:58 PM CDT | Special Weather Statement | OAX | Pottawattamie | 32 min |
| Aug 1, 5:17 PM CDT | Special Weather Statement | OAX | Montgomery | 28 min |
| Aug 1, 5:56 PM CDT | Special Weather Statement | OAX | Page | 34 min |
| Aug 1, 6:29 PM CDT | Special Weather Statement | DMX | Taylor | 46 min |
| Aug 2, 2:45 PM CDT | Special Weather Statement | DVN | Clinton | 15 min |
| Aug 6, 9:26 AM CDT | Special Weather Statement | OAX | Mills | 49 min |
| Aug 6, 10:57 AM CDT | Special Weather Statement | DMX | Guthrie | 48 min |
| Aug 6, 11:00 AM CDT | Special Weather Statement | DMX | Dallas | 45 min |
| Aug 6, 11:11 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 32 min |
| Aug 6, 12:00 PM CDT | Special Weather Statement | DMX | Dallas | 45 min |
| Aug 6, 1:01 PM CDT | Special Weather Statement | DMX | Madison | 29 min |
| Aug 6, 2:05 PM CDT | Special Weather Statement | DMX | Greene | 25 min |
| Aug 6, 3:21 PM CDT | Special Weather Statement | DMX | Boone | 24 min |
| Aug 6, 3:35 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Polk, Story | 40 min |
| Aug 6, 4:15 PM CDT | Special Weather Statement | DMX | Polk | 45 min |
| Aug 8, 5:00 PM CDT | Mesoscale Discussion | SPC | Howard | 2 hr |
| Aug 8, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Osceola, Sioux | 6 hr |
| Aug 9, 1:46 AM CDT | Mesoscale Discussion | SPC | Lyon, Osceola, Sioux | 59 min |
| Aug 9, 2:18 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 42 min |
| Aug 9, 2:55 AM CDT | Heat Advisory | OAX | Fremont, Mills, Page | 13 hr |
| Aug 9, 4:30 AM CDT | Special Weather Statement | DMX | Hancock, Kossuth, Winnebago | 60 min |
| Aug 9, 7:26 AM CDT | Severe Thunderstorm Warning | OAX | Harrison | 34 min |
| Aug 9, 7:51 AM CDT | Special Weather Statement | DMX | Black Hawk, Bremer | 54 min |
| Aug 9, 7:59 AM CDT | Special Weather Statement | OAX | Harrison | 46 min |
| Aug 9, 8:06 AM CDT | Special Weather Statement | DVN | Buchanan | 39 min |
| Aug 9, 8:12 AM CDT | Special Weather Statement | ARX | Fayette | 78 min |
| Aug 9, 8:39 AM CDT | Special Weather Statement | DVN | Buchanan | 66 min |
| Aug 9, 8:58 AM CDT | Special Weather Statement | DMX | Pocahontas, Sac | 62 min |
| Aug 9, 9:07 AM CDT | Special Weather Statement | ARX | Clayton | 68 min |
| Aug 9, 9:16 AM CDT | Special Weather Statement | DVN | Delaware | 44 min |
| Aug 9, 9:55 AM CDT | Special Weather Statement | DVN | Dubuque | 65 min |
| Aug 9, 12:49 PM CDT | Special Weather Statement | DVN | Delaware | 41 min |
| Aug 9, 1:28 PM CDT | Special Weather Statement | DVN | Delaware | 47 min |
| Aug 9, 1:30 PM CDT | Mesoscale Discussion | SPC | Delaware, Dubuque | 2 hr |
| Aug 9, 10:59 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Buena Vista, Butler, Calhoun, Carroll and 32 more | 3 hr |
| Aug 10, 3:19 AM CDT | Mesoscale Discussion | SPC | Lyon, O'Brien, Osceola, Plymouth, Sioux, Woodbury | 116 min |
| Aug 10, 5:51 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 39 min |
| Aug 10, 6:06 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 5 hr |
| Aug 10, 7:46 AM CDT | Mesoscale Discussion | SPC | Ida, Monona, Plymouth, Woodbury | 89 min |
| Aug 10, 8:30 AM CDT | Special Weather Statement | OAX | Monona | 45 min |
| Aug 10, 8:40 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 39 more | 65 min |
| Aug 10, 8:42 AM CDT | Special Weather Statement | OAX | Harrison | 33 min |
| Aug 10, 8:46 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Shelby | 29 min |
| Aug 10, 8:49 AM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 41 min |
| Aug 10, 8:53 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 52 min |
| Aug 10, 8:53 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Pottawattamie | 37 min |
| Aug 10, 8:56 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 30 more | 5 hr |
| Aug 10, 9:09 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 51 min |
| Aug 10, 9:15 AM CDT | Special Weather Statement | OAX | Fremont, Mills | 45 min |
| Aug 10, 9:25 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 50 min |
| Aug 10, 9:26 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Ida | 34 min |
| Aug 10, 9:29 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford, Greene, Guthrie | 46 min |
| Aug 10, 9:39 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 51 min |
| Aug 10, 9:45 AM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Calhoun, Carroll, Cass and 17 more | 90 min |
| Aug 10, 9:46 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 44 min |
| Aug 10, 9:58 AM CDT | Special Weather Statement | ARX | Chickasaw, Floyd, Howard | 47 min |
| Aug 10, 10:06 AM CDT | Special Weather Statement | OAX | Page | 24 min |
| Aug 10, 10:11 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Carroll, Dallas, Greene, Guthrie, Polk | 49 min |
| Aug 10, 10:17 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Clarke, Madison, Union | 43 min |
| Aug 10, 10:32 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard, Winneshiek | 23 min |
| Aug 10, 10:35 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Hamilton, Webster | 40 min |
| Aug 10, 10:39 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Jasper, Marion, Marshall, Polk, Story and 1 more | 51 min |
| Aug 10, 10:42 AM CDT | Mesoscale Discussion | SPC | Allamakee, Buchanan, Cedar, Chickasaw, Clayton, Clinton and 18 more | 93 min |
| Aug 10, 10:51 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Madison, Marion, Union, Warren | 39 min |
| Aug 10, 10:58 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Madison, Polk | 17 min |
| Aug 10, 10:59 AM CDT | Special Weather Statement | ARX | Chickasaw, Fayette, Floyd, Winneshiek | 46 min |
| Aug 10, 11:00 AM CDT | Mesoscale Discussion | SPC | Boone, Dallas, Jasper, Mahaska, Marion, Marshall and 5 more | 60 min |
| Aug 10, 11:10 AM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hamilton, Hardin | 50 min |
| Aug 10, 11:19 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Marshall, Polk, Poweshiek and 3 more | 41 min |
| Aug 10, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more | 7 hr |
| Aug 10, 11:28 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Decatur, Lucas, Mahaska, Marion, Monroe and 3 more | 47 min |
| Aug 10, 11:44 AM CDT | Special Weather Statement | ARX | Clayton, Fayette | 46 min |
| Aug 10, 11:47 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Hardin, Tama | 58 min |
| Aug 10, 11:48 AM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa, Johnson, Keokuk, Linn, Washington | 57 min |
| Aug 10, 11:52 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Marshall, Poweshiek, Tama | 38 min |
| Aug 10, 11:58 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Mahaska, Monroe, Wapello | 47 min |
| Aug 10, 12:04 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 41 min |
| Aug 10, 12:05 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Van Buren, Washington | 55 min |
| Aug 10, 12:13 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Tama | 50 min |
| Aug 10, 12:14 PM CDT | Mesoscale Discussion | SPC | Benton, Cedar, Clinton, Iowa, Jackson, Johnson and 10 more | 91 min |
| Aug 10, 12:17 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Linn | 58 min |
| Aug 10, 12:28 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek, Tama | 32 min |
| Aug 10, 12:34 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Johnson, Jones, Linn and 2 more | 56 min |
| Aug 10, 12:38 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson, Jones, Linn | 37 min |
| Aug 10, 12:42 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Jefferson, Johnson, Lee, Louisa and 3 more | 48 min |
| Aug 10, 12:47 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 28 min |
| Aug 10, 1:15 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Jones, Muscatine, Scott | 60 min |
| Aug 10, 1:20 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson, Jones | 55 min |
| Aug 10, 1:23 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 52 min |
| Aug 10, 1:36 PM CDT | Mesoscale Discussion | SPC | Clinton, Jackson, Scott | 114 min |
| Aug 10, 2:15 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 30 min |
| Aug 14, 1:57 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 19 more | 2 hr |
| Aug 14, 2:17 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Harrison, Ida and 8 more | 6 hr |
| Aug 14, 2:47 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 43 min |
| Aug 14, 3:27 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 48 min |
| Aug 14, 4:55 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 35 min |
| Aug 14, 5:35 PM CDT | Mesoscale Discussion | SPC | Cherokee, Dickinson, Lyon, Monona, O'Brien, Osceola and 3 more | 85 min |
| Aug 14, 10:21 PM CDT | Mesoscale Discussion | SPC | Howard, Mitchell | 54 min |
| Aug 15, 1:50 AM CDT | Special Weather Statement | DMX | Clarke | 25 min |
| Aug 15, 2:21 AM CDT | Special Weather Statement | DMX | Lucas | 39 min |
| Aug 15, 2:58 AM CDT | Special Weather Statement | DMX | Wayne | 47 min |
| Aug 15, 3:31 AM CDT | Special Weather Statement | DMX | Wayne | 29 min |
| Aug 17, 4:05 PM CDT | Special Weather Statement | DVN | Lee, Van Buren | 40 min |
| Aug 22, 6:57 PM CDT | Mesoscale Discussion | SPC | Boone, Calhoun, Carroll, Dallas, Greene, Guthrie and 10 more | 93 min |
| Aug 22, 7:24 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas | 36 min |
| Aug 23, 12:05 AM CDT | Special Weather Statement | DVN | Dubuque | 55 min |
| Aug 23, 1:12 AM CDT | Special Weather Statement | DVN | Jackson | 63 min |
| Aug 23, 3:13 AM CDT | Special Weather Statement | DVN | Clinton, Jackson | 62 min |
| Aug 23, 4:16 AM CDT | Special Weather Statement | DVN | Jackson | 59 min |
| Aug 23, 5:16 AM CDT | Special Weather Statement | DVN | Muscatine | 59 min |
| Aug 23, 6:32 AM CDT | Special Weather Statement | DVN | Clinton | 28 min |
| Aug 24, 3:21 AM CDT | Heat Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 16 hr |
| Aug 24, 3:54 AM CDT | Heat Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 17 hr |
| Aug 24, 12:18 PM CDT | Heat Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 7 hr |
| Aug 24, 1:30 PM CDT | Heat Advisory | DMX | Black Hawk, Boone, Bremer, Butler, Calhoun, Cerro Gordo and 26 more | 6 hr |
| Aug 24, 4:00 PM CDT | Mesoscale Discussion | SPC | Allamakee | 90 min |
| Aug 25, 2:48 AM CDT | Heat Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 16 hr |
| Aug 25, 3:07 AM CDT | Heat Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 16 hr |
| Aug 25, 3:25 AM CDT | Heat Advisory | FSD | Lyon, Osceola | 17 hr |
| Aug 26, 2:53 AM CDT | Heat Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 16 hr |
| Aug 28, 1:28 AM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola, Winnebago | 92 min |
| Aug 28, 6:59 AM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Chickasaw, Floyd, Hancock, Howard and 5 more | 91 min |
| Aug 28, 7:35 AM CDT | Special Weather Statement | ARX | Allamakee, Howard, Winneshiek | 70 min |
| Aug 28, 8:33 AM CDT | Special Weather Statement | ARX | Allamakee, Chickasaw, Winneshiek | 72 min |
| Aug 28, 2:46 PM CDT | Special Weather Statement | DMX | Marshall, Story, Tama | 59 min |
| Aug 28, 2:55 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 50 min |
| Aug 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Audubon, Benton and 53 more | 64 min |
| Aug 28, 3:09 PM CDT | Special Weather Statement | ARX | Fayette | 51 min |
| Aug 28, 3:13 PM CDT | Special Weather Statement | DVN | Buchanan | 32 min |
| Aug 28, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 19 more | 4 hr |
| Aug 28, 3:21 PM CDT | Special Weather Statement | DVN | Delaware | 24 min |
| Aug 28, 3:33 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Tama | 42 min |
| Aug 28, 3:48 PM CDT | Special Weather Statement | DVN | Buchanan | 42 min |
| Aug 28, 3:50 PM CDT | Special Weather Statement | DVN | Delaware | 40 min |
| Aug 28, 3:59 PM CDT | Severe Thunderstorm Warning | DVN | Benton | 46 min |
| Aug 28, 4:09 PM CDT | Special Weather Statement | DVN | Delaware | 36 min |
| Aug 28, 4:27 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson, Jones | 33 min |
| Aug 28, 4:31 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion | 44 min |
| Aug 28, 4:34 PM CDT | Special Weather Statement | DVN | Linn | 26 min |
| Aug 28, 4:57 PM CDT | Special Weather Statement | DVN | Buchanan | 33 min |
| Aug 28, 5:02 PM CDT | Special Weather Statement | DVN | Jones | 28 min |
| Aug 28, 5:26 PM CDT | Special Weather Statement | DVN | Clinton | 34 min |
| Aug 28, 5:29 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clinton, Davis, Des Moines, Henry, Jefferson and 8 more | 91 min |
| Aug 28, 5:47 PM CDT | Special Weather Statement | DVN | Scott | 43 min |
| Aug 28, 5:56 PM CDT | Special Weather Statement | DVN | Dubuque | 34 min |
| Aug 31, 4:02 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 28 min |
| Aug 31, 4:28 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 21 min |
| Aug 31, 5:11 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 34 min |
| Aug 31, 5:52 AM CDT | Special Weather Statement | OAX | Page | 23 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 | 54 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 59 |
| Heat | |
| Heat Advisory | 9 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Jackson County17
- Clinton County16
- Delaware County16
- Mahaska County14
- Marshall County14
- Tama County14
- Polk County13
- Story County13
- Lyon County13
- Osceola County13
- Dubuque County13
- Marion County13
- Jones County13
- Linn County13
- Boone County12
- Buchanan County12
- Fayette County12
- Plymouth County12
- Dallas County11
- Allamakee County11
- Jasper County11
- Poweshiek County11
- Muscatine County11
- Scott County11
- Washington County11
- Guthrie County10
- Carroll County10
- Greene County10
- Howard County10
- Sioux County10
- Clayton County10
- Calhoun County10
- Chickasaw County10
- Winneshiek County10
- Woodbury County10
- Johnson County10
- Benton County10
- Monona County9
- Warren County9
- Cedar County9
59 more counties
- Van Buren County9
- Keokuk County9
- Madison County8
- O'Brien County8
- Harrison County8
- Pocahontas County8
- Sac County8
- Floyd County8
- Hamilton County8
- Ida County8
- Webster County8
- Hardin County8
- Grundy County8
- Des Moines County8
- Jefferson County8
- Lee County8
- Louisa County8
- Page County7
- Black Hawk County7
- Dickinson County7
- Monroe County7
- Henry County7
- Iowa County7
- Mills County6
- Winnebago County6
- Buena Vista County6
- Cherokee County6
- Crawford County6
- Humboldt County6
- Mitchell County6
- Adair County6
- Audubon County6
- Clarke County6
- Lucas County6
- Wapello County6
- Pottawattamie County5
- Fremont County5
- Hancock County5
- Kossuth County5
- Bremer County5
- Clay County5
- Wright County5
- Appanoose County5
- Cass County5
- Shelby County5
- Wayne County5
- Montgomery County4
- Cerro Gordo County4
- Emmet County4
- Franklin County4
- Union County4
- Davis County4
- Taylor County3
- Butler County3
- Palo Alto County3
- Worth County3
- Decatur County3
- Adams County2
- Ringgold County2
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.