Alert archive / Iowa / Severe Thunderstorm Warnings / 2023
Severe Thunderstorm Warnings in Iowa, September 2023
14 severe thunderstorm warnings in September 2023. 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 warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in September 2023. Tap one for its archive.
- Severe Thunderstorm Warnings
- 14
- Busiest day
- September 19, 20234 severe thunderstorm warnings
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 |
|---|---|---|---|---|
| Sep 15, 6:03 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 42 min |
| Sep 15, 6:23 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Sioux | 37 min |
| Sep 19, 1:19 AM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 26 min |
| Sep 19, 12:09 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 32 min |
| Sep 19, 2:26 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 49 min |
| Sep 19, 3:26 PM CDT | Severe Thunderstorm Warning | DMX | Greene, Guthrie | 21 min |
| Sep 20, 2:00 AM CDT | Severe Thunderstorm Warning | OAX | Mills | 30 min |
| Sep 20, 3:28 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 32 min |
| Sep 20, 3:57 AM CDT | Severe Thunderstorm Warning | OAX | Fremont | 11 min |
| Sep 23, 10:24 AM CDT | Severe Thunderstorm Warning | OAX | Harrison | 28 min |
| Sep 23, 11:17 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 11 min |
| Sep 23, 12:23 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Greene, Pocahontas, Sac and 1 more | 67 min |
| Sep 23, 1:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Calhoun, Carroll, Greene, Hamilton, Hancock and 4 more | 66 min |
| Sep 29, 6:20 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 25 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Sioux County3
- Greene County3
- Harrison County2
- Shelby County2
- Mills County2
- Fremont County2
- Calhoun County2
- Carroll County2
- Pocahontas County2
- Webster County2
- Lyon County1
- O'Brien County1
- Ida County1
- Woodbury County1
- Guthrie County1
- Monona County1
- Crawford County1
- Sac County1
- Boone County1
- Hamilton County1
- Hancock County1
- Humboldt County1
- Wright County1
- Plymouth County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20222024
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.