Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 2018
27 severe thunderstorm watches in 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Severe Thunderstorm Watches
- 27
- Busiest month
- May7 severe thunderstorm watches
- Busiest day
- May 29, 20182 severe thunderstorm watches
Over time
By month
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 13, 3:22 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Black Hawk, Boone, Calhoun, Carroll, Dallas and 13 more | 6 hr |
| May 1, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allamakee, Audubon, Benton, Black Hawk, Boone and 44 more | 6 hr |
| May 2, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more | 9 hr |
| May 3, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 24 more | 6 hr |
| May 14, 2:54 PM CDT | Severe Thunderstorm Watch | SPC | Scott | 6 hr |
| May 25, 2:02 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 8 hr |
| May 29, 1:43 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 26 more | 6 hr |
| May 29, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 7 hr |
| Jun 1, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Harrison, Ida, Mills, Monona and 5 more | 5 hr |
| Jun 6, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 41 more | 9 hr |
| Jun 9, 7:43 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 17 more | 6 hr |
| Jun 18, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 35 more | 6 hr |
| Jun 28, 8:12 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 28 more | 6 hr |
| Jun 28, 1:04 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Keokuk, Lee, Van Buren | 7 hr |
| Jun 30, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Audubon, Boone, Bremer and 46 more | 7 hr |
| Jul 12, 5:04 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Osceola, Sioux | 7 hr |
| Jul 13, 3:54 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Buchanan, Chickasaw, Clayton, Delaware, Dubuque and 3 more | 6 hr |
| Jul 19, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Page | 5 hr |
| Jul 25, 4:05 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 17 more | 7 hr |
| Aug 5, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 4 hr |
| Aug 5, 4:10 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Calhoun, Carroll, Cerro Gordo, Crawford, Emmet and 15 more | 3 hr |
| Aug 27, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 14 more | 7 hr |
| Aug 28, 1:14 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 18 more | 8 hr |
| Aug 28, 5:06 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Cedar, Clinton, Davis, Des Moines and 20 more | 6 hr |
| Sep 1, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Boone and 44 more | 5 hr |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 38 more | 8 hr |
| Sep 25, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Dubuque, Henry, Jackson and 5 more | 8 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Audubon County10
- Boone County10
- Carroll County10
- Greene County10
- Guthrie County10
- Hardin County10
- Dallas County9
- Hamilton County9
- Marshall County9
- Polk County9
- Story County9
- Adair County9
- Cass County9
- Franklin County9
- Humboldt County9
- Mills County9
- Calhoun County8
- Grundy County8
- Sac County8
- Tama County8
- Webster County8
- Cerro Gordo County8
- Crawford County8
- Madison County8
- Pocahontas County8
- Worth County8
- Wright County8
- Fremont County8
- Montgomery County8
- Page County8
- Pottawattamie County8
- Poweshiek County7
- Clayton County7
- Emmet County7
- Fayette County7
- Hancock County7
- Howard County7
- Kossuth County7
- Mahaska County7
- Palo Alto County7
59 more counties
- Warren County7
- Winnebago County7
- Shelby County7
- Black Hawk County6
- Jasper County6
- Allamakee County6
- Bremer County6
- Butler County6
- Chickasaw County6
- Marion County6
- Mitchell County6
- Winneshiek County6
- Adams County6
- Taylor County6
- Buena Vista County6
- Harrison County6
- Monona County6
- Floyd County5
- Cedar County5
- Des Moines County5
- Henry County5
- Jones County5
- Muscatine County5
- Scott County5
- Appanoose County5
- Davis County5
- Lucas County5
- Monroe County5
- Ringgold County5
- Union County5
- Wapello County5
- Wayne County5
- Cherokee County5
- Ida County5
- Plymouth County5
- Woodbury County5
- Benton County4
- Buchanan County4
- Delaware County4
- Clinton County4
- Iowa County4
- Jackson County4
- Jefferson County4
- Johnson County4
- Keokuk County4
- Lee County4
- Louisa County4
- Van Buren County4
- Clarke County4
- Decatur County4
- Clay County4
- Dickinson County4
- Dubuque County4
- Osceola County4
- Washington County3
- Linn County3
- Lyon County3
- Sioux County3
- O'Brien County3
The busiest days
Days with the most alerts issued, by UTC date.
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.