Alert archive / Iowa / Mesoscale Discussions / 2009
Mesoscale Discussions in Iowa, May 2009
18 mesoscale discussions in May 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in May 2009. Tap one for its archive.
- Mesoscale Discussions
- 18
- Busiest day
- May 7, 20094 mesoscale discussions
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 |
|---|---|---|---|---|
| May 6, 1:55 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Crawford, Dickinson, Ida and 8 more | 65 min |
| May 7, 1:12 PM CDT | Mesoscale Discussion | SPC | Decatur, Fremont, Mills, Montgomery, Page, Ringgold and 1 more | 93 min |
| May 7, 3:55 PM CDT | Mesoscale Discussion | SPC | Appanoose, Decatur, Fremont, Montgomery, Page, Ringgold and 2 more | 65 min |
| May 7, 5:42 PM CDT | Mesoscale Discussion | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 8 more | 2 hr |
| May 7, 5:56 PM CDT | Mesoscale Discussion | SPC | Lee | 64 min |
| May 8, 1:05 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 54 more | 85 min |
| May 8, 5:47 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clayton and 29 more | 58 min |
| May 8, 8:35 PM CDT | Mesoscale Discussion | SPC | Des Moines | 85 min |
| May 12, 1:22 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Decatur, Fremont and 10 more | 53 min |
| May 12, 8:42 PM CDT | Mesoscale Discussion | SPC | Lyon | 93 min |
| May 13, 1:52 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Lee, Monroe, Van Buren, Wayne | 23 min |
| May 13, 5:47 PM CDT | Mesoscale Discussion | SPC | Appanoose, Cedar, Clinton, Davis, Des Moines, Henry and 16 more | 88 min |
| May 13, 7:05 PM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Des Moines, Henry, Jefferson, Keokuk and 6 more | 85 min |
| May 13, 8:35 PM CDT | Mesoscale Discussion | SPC | Lee | 85 min |
| May 15, 2:03 AM CDT | Mesoscale Discussion | SPC | Fremont, Page, Ringgold, Taylor | 87 min |
| May 15, 7:14 AM CDT | Mesoscale Discussion | SPC | Adams, Fremont, Mills, Montgomery, Page, Ringgold and 1 more | 91 min |
| May 15, 11:48 AM CDT | Mesoscale Discussion | SPC | Fremont, Page | 57 min |
| May 15, 1:17 PM CDT | Mesoscale Discussion | SPC | Lyon, Osceola | 58 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fremont County7
- Page County7
- Ringgold County6
- Taylor County6
- Appanoose County6
- Montgomery County5
- Monroe County5
- Lee County5
- Decatur County4
- Wayne County4
- Adams County4
- Davis County4
- Jefferson County4
- Keokuk County4
- Washington County4
- Des Moines County4
- Van Buren County4
- Lyon County3
- Mills County3
- Lucas County3
- Union County3
- Iowa County3
- Johnson County3
- Linn County3
- Mahaska County3
- Wapello County3
- Cedar County3
- Clinton County3
- Henry County3
- Louisa County3
- Muscatine County3
- Scott County3
- Buena Vista County2
- Crawford County2
- Ida County2
- Monona County2
- Osceola County2
- Sac County2
- Clarke County2
- Adair County2
50 more counties
- Audubon County2
- Benton County2
- Black Hawk County2
- Buchanan County2
- Cass County2
- Clayton County2
- Delaware County2
- Grundy County2
- Guthrie County2
- Harrison County2
- Jasper County2
- Marion County2
- Marshall County2
- Pottawattamie County2
- Poweshiek County2
- Shelby County2
- Tama County2
- Jackson County2
- Jones County2
- Cherokee County1
- Clay County1
- Dickinson County1
- O'Brien County1
- Plymouth County1
- Sioux County1
- Woodbury County1
- Boone County1
- Bremer County1
- Butler County1
- Calhoun County1
- Carroll County1
- Cerro Gordo County1
- Chickasaw County1
- Dallas County1
- Fayette County1
- Floyd County1
- Franklin County1
- Greene County1
- Hamilton County1
- Hancock County1
- Hardin County1
- Humboldt County1
- Madison County1
- Pocahontas County1
- Polk County1
- Story County1
- Warren County1
- Webster County1
- Wright County1
- Dubuque County1
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.