Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 2009
51 severe thunderstorm watches in 2009. 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 2009. Tap one for its archive.
- Severe Thunderstorm Watches
- 51
- Busiest month
- June22 severe thunderstorm watches
- Busiest day
- August 9, 20095 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 24, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Audubon, Black Hawk, Boone and 34 more | 6 hr |
| Apr 25, 4:30 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Davis, Decatur, Monroe, Wapello, Wayne | 6 hr |
| Apr 25, 10:09 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Page | 6 hr |
| Apr 26, 9:34 AM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 29 more | 6 hr |
| May 8, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 44 more | 6 hr |
| May 8, 6:10 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clayton, Clinton, Delaware, Des Moines and 15 more | 4 hr |
| May 15, 7:42 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 5 hr |
| Jun 1, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | Scott | 7 hr |
| Jun 1, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Cedar, Clarke and 31 more | 8 hr |
| Jun 6, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 6 hr |
| Jun 6, 11:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more | 6 hr |
| Jun 7, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Louisa, Van Buren | 6 hr |
| Jun 15, 8:14 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Cass, Fremont, Mills, Montgomery, Page and 3 more | 6 hr |
| Jun 17, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 29 more | 7 hr |
| Jun 17, 11:53 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allamakee, Appanoose, Audubon, Benton, Black Hawk and 68 more | 6 hr |
| Jun 18, 4:20 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 4 hr |
| Jun 18, 7:04 AM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Chickasaw and 20 more | 4 hr |
| Jun 18, 10:11 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 11 more | 6 hr |
| Jun 19, 2:13 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 40 more | 8 hr |
| Jun 19, 7:14 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 7 hr |
| Jun 19, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Clarke, Dallas and 20 more | 4 hr |
| Jun 19, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Dubuque, Henry and 13 more | 8 hr |
| Jun 23, 8:01 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 6 hr |
| Jun 23, 12:01 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Boone, Bremer, Butler, Calhoun, Carroll and 27 more | 6 hr |
| Jun 23, 3:28 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Buchanan and 40 more | 7 hr |
| Jun 23, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Louisa, Van Buren | 4 hr |
| Jun 24, 11:53 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Harrison, Lyon, Monona, O'Brien, Plymouth and 2 more | 5 hr |
| Jun 25, 12:48 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more | 6 hr |
| Jun 27, 2:41 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 16 more | 7 hr |
| Jul 7, 2:13 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 8 hr |
| Jul 7, 6:56 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Boone, Calhoun, Carroll, Crawford, Dallas and 17 more | 6 hr |
| Jul 7, 9:44 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Fremont, Harrison, Ida, Mills and 8 more | 5 hr |
| Jul 9, 3:41 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 6 hr |
| Jul 9, 9:32 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Cass, Crawford, Fremont and 9 more | 4 hr |
| Jul 9, 7:02 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 21 more | 7 hr |
| Jul 14, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 6 hr |
| Jul 14, 8:13 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 33 more | 5 hr |
| Jul 24, 10:32 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 35 more | 6 hr |
| Jul 24, 9:51 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Van Buren | 4 hr |
| Jul 27, 2:41 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Howard, Mitchell, Winneshiek | 6 hr |
| Aug 2, 8:41 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 6 hr |
| Aug 2, 11:37 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Audubon, Black Hawk, Boone, Bremer, Butler and 35 more | 6 hr |
| Aug 4, 1:10 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Page | 6 hr |
| Aug 4, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Davis, Decatur, Lee, Ringgold, Taylor and 2 more | 5 hr |
| Aug 7, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 27 more | 6 hr |
| Aug 9, 5:16 AM CDT | Severe Thunderstorm Watch | SPC | Harrison, Monona, Pottawattamie, Shelby | 6 hr |
| Aug 9, 6:54 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 36 more | 7 hr |
| Aug 9, 10:21 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 9 more | 8 hr |
| Aug 9, 3:44 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 32 more | 6 hr |
| Aug 9, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 8 hr |
| Aug 19, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 43 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Audubon County16
- Calhoun County16
- Fremont County16
- Greene County16
- Page County16
- Webster County16
- Boone County15
- Carroll County15
- Guthrie County15
- Story County15
- Cass County14
- Dallas County14
- Hamilton County14
- Hardin County14
- Humboldt County14
- Mills County14
- Montgomery County14
- Crawford County14
- Pocahontas County14
- Adair County13
- Marshall County13
- Polk County13
- Wright County13
- Buena Vista County13
- Cherokee County13
- Palo Alto County13
- Sac County13
- Woodbury County13
- Black Hawk County12
- Grundy County12
- Hancock County12
- Madison County12
- Pottawattamie County12
- Emmet County12
- Ida County12
- Kossuth County12
- Plymouth County12
- Sioux County12
- Jasper County12
- Poweshiek County12
59 more counties
- Tama County12
- Des Moines County12
- Henry County12
- Iowa County12
- Lee County12
- Van Buren County12
- Adams County11
- Franklin County11
- Clay County11
- Dickinson County11
- O'Brien County11
- Shelby County11
- Winnebago County11
- Ringgold County11
- Taylor County11
- Benton County11
- Cedar County11
- Dubuque County11
- Jackson County11
- Jefferson County11
- Johnson County11
- Jones County11
- Linn County11
- Louisa County11
- Bremer County10
- Butler County10
- Cerro Gordo County10
- Worth County10
- Appanoose County10
- Davis County10
- Decatur County10
- Wayne County10
- Harrison County10
- Monona County10
- Osceola County10
- Warren County10
- Clinton County10
- Delaware County10
- Muscatine County10
- Scott County10
- Washington County10
- Lyon County10
- Mitchell County9
- Monroe County9
- Wapello County9
- Clarke County9
- Mahaska County9
- Marion County9
- Union County9
- Keokuk County9
- Buchanan County9
- Chickasaw County8
- Clayton County8
- Fayette County8
- Floyd County8
- Howard County8
- Winneshiek County8
- Lucas County8
- Allamakee County6
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.