Alert archive / Iowa / Severe Thunderstorm Warnings / 2018
Severe Thunderstorm Warnings in Iowa, August 2018
95 severe thunderstorm warnings in August 2018. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2018. Tap one for its archive.
- Severe Thunderstorm Warnings
- 95
- Busiest day
- August 28, 201836 severe thunderstorm warnings
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, 4:29 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Wright | 46 min |
| Aug 1, 5:03 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Wright | 27 min |
| Aug 1, 5:26 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 49 min |
| Aug 1, 6:09 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Winneshiek | 51 min |
| Aug 1, 6:19 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster | 41 min |
| Aug 1, 6:40 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 50 min |
| Aug 1, 6:53 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Story, Webster | 52 min |
| Aug 1, 6:59 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin | 46 min |
| Aug 1, 7:40 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Greene, Guthrie | 50 min |
| Aug 1, 8:16 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Jasper, Polk, Story | 44 min |
| Aug 5, 1:54 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 51 min |
| Aug 5, 2:25 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 50 min |
| Aug 5, 2:41 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 49 min |
| Aug 5, 3:06 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Osceola, Plymouth | 39 min |
| Aug 5, 3:20 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 25 min |
| Aug 5, 3:33 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay, Ida | 57 min |
| Aug 5, 3:36 AM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 54 min |
| Aug 5, 3:53 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Palo Alto, Pocahontas, Sac | 67 min |
| Aug 5, 4:24 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Hamilton, Hancock, Humboldt, Kossuth, Webster and 1 more | 66 min |
| Aug 5, 9:36 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Grundy, Hamilton, Hardin, Wright | 39 min |
| Aug 5, 5:07 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Jones, Linn | 38 min |
| Aug 5, 5:42 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Poweshiek, Tama | 48 min |
| Aug 5, 6:10 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson, Jones | 50 min |
| Aug 5, 6:45 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 45 min |
| Aug 5, 9:17 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Pocahontas, Webster | 43 min |
| Aug 5, 9:48 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 57 min |
| Aug 5, 10:20 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson, Jones | 55 min |
| Aug 5, 10:40 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin, Wright | 53 min |
| Aug 5, 11:33 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Sac | 42 min |
| Aug 6, 6:10 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 35 min |
| Aug 6, 6:40 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 50 min |
| Aug 6, 10:11 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson | 37 min |
| Aug 7, 3:45 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene | 45 min |
| Aug 7, 2:43 PM CDT | Severe Thunderstorm Warning | ARX | Howard | 47 min |
| Aug 7, 3:53 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 33 min |
| Aug 24, 4:48 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Winnebago | 42 min |
| Aug 24, 5:20 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 40 min |
| Aug 24, 6:11 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 49 min |
| Aug 24, 6:58 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin | 47 min |
| Aug 24, 7:02 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 58 min |
| Aug 26, 10:19 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida | 41 min |
| Aug 26, 9:44 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Pocahontas, Webster | 31 min |
| Aug 26, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 26 min |
| Aug 26, 10:40 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Humboldt, Webster, Wright | 35 min |
| Aug 27, 2:24 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 36 min |
| Aug 27, 2:51 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth, Sioux | 39 min |
| Aug 27, 3:27 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien | 33 min |
| Aug 27, 3:30 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Plymouth, Sioux | 30 min |
| Aug 27, 3:51 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 24 min |
| Aug 27, 3:57 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 18 min |
| Aug 27, 4:09 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 20 min |
| Aug 27, 4:30 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 45 min |
| Aug 27, 5:14 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago, Worth | 46 min |
| Aug 28, 3:48 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 42 min |
| Aug 28, 4:35 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 40 min |
| Aug 28, 5:11 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Sioux | 49 min |
| Aug 28, 5:50 AM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 40 min |
| Aug 28, 6:19 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay | 41 min |
| Aug 28, 6:21 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 54 min |
| Aug 28, 7:08 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas, Wright | 45 min |
| Aug 28, 7:44 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin, Hancock, Humboldt, Kossuth, Winnebago and 2 more | 46 min |
| Aug 28, 8:07 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin, Worth | 38 min |
| Aug 28, 8:27 AM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 48 min |
| Aug 28, 8:44 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 16 min |
| Aug 28, 8:50 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd, Howard, Mitchell | 40 min |
| Aug 28, 9:19 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 26 min |
| Aug 28, 9:34 AM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 41 min |
| Aug 28, 10:08 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 33 min |
| Aug 28, 10:16 AM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 14 min |
| Aug 28, 11:34 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Hamilton, Story | 41 min |
| Aug 28, 12:15 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth, Webster, Wright | 30 min |
| Aug 28, 12:39 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 36 min |
| Aug 28, 12:47 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin, Hancock, Wright | 43 min |
| Aug 28, 1:03 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 42 min |
| Aug 28, 1:38 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Franklin, Hamilton, Hardin, Story, Webster and 1 more | 52 min |
| Aug 28, 4:34 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion | 41 min |
| Aug 28, 4:38 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 52 min |
| Aug 28, 4:50 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe, Warren, Wayne | 40 min |
| Aug 28, 5:03 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Poweshiek | 42 min |
| Aug 28, 5:14 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 61 min |
| Aug 28, 5:17 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Monroe, Wapello | 43 min |
| Aug 28, 5:30 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 45 min |
| Aug 28, 5:47 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Monroe, Wapello | 58 min |
| Aug 28, 5:51 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Keokuk, Van Buren, Washington | 39 min |
| Aug 28, 5:59 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Louisa, Muscatine, Washington | 61 min |
| Aug 28, 6:18 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Louisa, Washington | 42 min |
| Aug 28, 6:37 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Johnson, Jones, Linn | 38 min |
| Aug 28, 6:41 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Muscatine, Scott | 64 min |
| Aug 28, 6:43 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 47 min |
| Aug 28, 7:00 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 60 min |
| Aug 28, 8:20 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee, Van Buren | 40 min |
| Aug 28, 8:26 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa | 49 min |
| Aug 31, 3:48 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 42 min |
| Aug 31, 4:25 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 50 min |
| Aug 31, 4:55 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 39 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Wright County12
- Hancock County10
- Hamilton County10
- Webster County9
- Sioux County8
- O'Brien County8
- Calhoun County8
- Kossuth County8
- Franklin County8
- Pocahontas County7
- Humboldt County7
- Plymouth County6
- Clay County6
- Winnebago County6
- Cerro Gordo County6
- Cherokee County5
- Jackson County5
- Henry County5
- Floyd County4
- Howard County4
- Winneshiek County4
- Boone County4
- Story County4
- Hardin County4
- Dallas County4
- Lyon County4
- Osceola County4
- Sac County4
- Butler County4
- Jones County4
- Dickinson County4
- Mahaska County4
- Monroe County4
- Washington County4
- Chickasaw County3
- Mitchell County3
- Carroll County3
- Greene County3
- Guthrie County3
- Jasper County3
43 more counties
- Buena Vista County3
- Palo Alto County3
- Dubuque County3
- Worth County3
- Wayne County3
- Johnson County3
- Wapello County3
- Cedar County3
- Louisa County3
- Clinton County3
- Ida County2
- Linn County2
- Poweshiek County2
- Fremont County2
- Jefferson County2
- Fayette County2
- Marion County2
- Lucas County2
- Keokuk County2
- Appanoose County2
- Davis County2
- Van Buren County2
- Muscatine County2
- Des Moines County2
- Taylor County2
- Polk County1
- Woodbury County1
- Grundy County1
- Benton County1
- Buchanan County1
- Delaware County1
- Tama County1
- Crawford County1
- Page County1
- Allamakee County1
- Clayton County1
- Decatur County1
- Warren County1
- Iowa County1
- Scott County1
- Lee County1
- Adair County1
- Madison County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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. Warning verification from the Mesonet's Cow. Rebuilt daily.