Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 1999
37 severe thunderstorm watches in 1999. 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 1999. Tap one for its archive.
- Severe Thunderstorm Watches
- 37
- Busiest month
- May12 severe thunderstorm watches
- Busiest day
- May 16, 19996 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 |
|---|---|---|---|---|
| Feb 11, 11:15 AM CST | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 2 more | 7 hr |
| Apr 8, 6:30 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Page | 6 hr |
| May 3, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Plymouth, Sioux | 5 hr |
| May 10, 7:15 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Carroll, Cass, Crawford, Fremont, Harrison and 5 more | 6 hr |
| May 14, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Mills, Pottawattamie | 6 hr |
| May 15, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills | 6 hr |
| May 16, 6:00 AM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Crawford, Fremont, Harrison, Ida, Lyon and 11 more | 5 hr |
| May 16, 9:45 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 64 more | 5 hr |
| May 16, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Buchanan, Clayton, Clinton and 8 more | 6 hr |
| May 16, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Chickasaw and 10 more | 6 hr |
| May 16, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Cerro Gordo, Chickasaw, Clay, Emmet, Floyd, Hancock and 7 more | 6 hr |
| May 16, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Clinton, Jackson | 6 hr |
| May 16, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Lee | 5 hr |
| May 22, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Pottawattamie, Shelby | 4 hr |
| Jun 4, 2:30 AM CDT | Severe Thunderstorm Watch | SPC | Audubon, Carroll, Crawford, Guthrie, Harrison, Ida and 4 more | 7 hr |
| Jun 4, 4:00 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Appanoose, Audubon, Benton and 59 more | 6 hr |
| Jun 4, 10:00 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Appanoose, Benton, Boone, Cedar, Clarke and 34 more | 5 hr |
| Jun 4, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Lee, Van Buren | 5 hr |
| Jun 6, 12:45 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 21 more | 5 hr |
| Jun 8, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Allamakee, Benton, Black Hawk, Boone and 59 more | 6 hr |
| Jun 9, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Hancock and 11 more | 6 hr |
| Jun 10, 10:35 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 37 more | 5 hr |
| Jun 10, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | Clinton, Jackson, Scott | 5 hr |
| Jun 11, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Clinton, Jackson, Scott | 7 hr |
| Jun 27, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | Harrison, Mills, Pottawattamie, Shelby | 6 hr |
| Jun 27, 6:00 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Clarke, Decatur, Fremont, Lucas, Mills and 6 more | 5 hr |
| Jul 2, 9:45 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 44 more | 5 hr |
| Jul 3, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | Clay, Dickinson, Emmet, Kossuth, Lyon, Mitchell and 6 more | 5 hr |
| Jul 8, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Chickasaw and 24 more | 5 hr |
| Jul 13, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | Cerro Gordo, Clay, Dickinson, Emmet, Hancock, Kossuth and 5 more | 6 hr |
| Jul 15, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | Lyon, Osceola, Sioux | 5 hr |
| Jul 20, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 41 more | 5 hr |
| Jul 27, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 32 more | 5 hr |
| Jul 30, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 6 hr |
| Jul 30, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Floyd, Howard, Mitchell and 1 more | 5 hr |
| Aug 18, 12:15 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Taylor | 5 hr |
| Aug 23, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Jackson, Jefferson and 8 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mills County11
- Tama County11
- Jackson County11
- Benton County10
- Chickasaw County10
- Winneshiek County10
- Clinton County10
- Fremont County9
- Black Hawk County9
- Buchanan County9
- Cerro Gordo County9
- Fayette County9
- Hancock County9
- Howard County9
- Jasper County9
- Kossuth County9
- Linn County9
- Marshall County9
- Poweshiek County9
- Winnebago County9
- Jones County9
- Muscatine County8
- Washington County8
- Shelby County8
- Floyd County8
- Grundy County8
- Iowa County8
- Johnson County8
- Mitchell County8
- Palo Alto County8
- Story County8
- Worth County8
- Allamakee County8
- Scott County8
- Lee County7
- Van Buren County7
- Carroll County7
- Harrison County7
- Bremer County7
- Clarke County7
59 more counties
- Dallas County7
- Emmet County7
- Greene County7
- Hamilton County7
- Keokuk County7
- Lucas County7
- Mahaska County7
- Marion County7
- Polk County7
- Wright County7
- Clayton County7
- Delaware County7
- Dubuque County7
- Cedar County7
- Des Moines County6
- Henry County6
- Jefferson County6
- Louisa County6
- Page County6
- Lyon County6
- Montgomery County6
- Pottawattamie County6
- Boone County6
- Butler County6
- Clay County6
- Franklin County6
- Guthrie County6
- Hardin County6
- Humboldt County6
- Madison County6
- Monroe County6
- Ringgold County6
- Taylor County6
- Union County6
- Warren County6
- Wayne County6
- Webster County6
- Sioux County5
- Audubon County5
- Cass County5
- Crawford County5
- Monona County5
- Osceola County5
- Adair County5
- Adams County5
- Appanoose County5
- Calhoun County5
- Davis County5
- Decatur County5
- Pocahontas County5
- Wapello County5
- Plymouth County4
- Ida County4
- O'Brien County4
- Woodbury County4
- Dickinson County4
- Cherokee County3
- Buena Vista County3
- Sac County3
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.