Alert archive / Iowa / Mesoscale Discussions / 2025
Mesoscale Discussions in Iowa, May 2025
6 mesoscale discussions in May 2025. 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 2025. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- May 15, 20254 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 15, 1:08 AM CDT | Mesoscale Discussion | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux and 1 more | 97 min |
| May 15, 4:04 AM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 1 more | 86 min |
| May 15, 7:23 AM CDT | Mesoscale Discussion | SPC | Lyon, Osceola, Sioux | 97 min |
| May 15, 2:14 PM CDT | Mesoscale Discussion | SPC | Dubuque, Jackson | 2 hr |
| May 19, 3:31 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Cass and 23 more | 89 min |
| May 19, 6:08 PM CDT | Mesoscale Discussion | SPC | Cass, Fremont, Harrison, Mills, Montgomery, Page and 2 more | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lyon County3
- Osceola County3
- Sioux County3
- O'Brien County2
- Cass County2
- Cherokee County1
- Plymouth County1
- Woodbury County1
- Clay County1
- Dickinson County1
- Emmet County1
- Dubuque County1
- Jackson County1
- Adair County1
- Adams County1
- Appanoose County1
- Audubon County1
- Boone County1
- Clarke County1
- Dallas County1
- Davis County1
- Decatur County1
- Greene County1
- Guthrie County1
- Jasper County1
- Jefferson County1
- Keokuk County1
- Lee County1
- Lucas County1
- Madison County1
- Mahaska County1
- Marion County1
- Monroe County1
- Polk County1
- Poweshiek County1
- Story County1
- Union County1
- Van Buren County1
- Wapello County1
- Warren County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.