Alert archive / Iowa / Severe Thunderstorm Warnings / 2016
Severe Thunderstorm Warnings in Iowa, September 2016
37 severe thunderstorm warnings in September 2016. 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 2016. Tap one for its archive.
- Severe Thunderstorm Warnings
- 37
- Busiest day
- September 21, 201610 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 5, 1:27 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Plymouth, Sioux | 48 min |
| Sep 5, 1:37 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 38 min |
| Sep 7, 7:56 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 28 min |
| Sep 9, 12:35 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 25 min |
| Sep 9, 12:57 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 33 min |
| Sep 9, 1:17 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 43 min |
| Sep 9, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Hamilton, Story, Webster | 42 min |
| Sep 9, 2:59 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 31 min |
| Sep 12, 10:32 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 19 min |
| Sep 15, 4:10 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 35 min |
| Sep 15, 4:49 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 41 min |
| Sep 15, 5:09 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 38 min |
| Sep 15, 5:28 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 17 min |
| Sep 15, 6:25 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 35 min |
| Sep 15, 6:44 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 46 min |
| Sep 15, 7:16 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Shelby | 44 min |
| Sep 16, 12:51 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 24 min |
| Sep 16, 1:15 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 30 min |
| Sep 16, 1:44 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 31 min |
| Sep 19, 2:24 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 21 min |
| Sep 19, 2:56 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 34 min |
| Sep 19, 4:35 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 40 min |
| Sep 19, 5:06 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Monroe | 39 min |
| Sep 19, 5:42 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 48 min |
| Sep 19, 6:20 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Wayne | 40 min |
| Sep 21, 3:32 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 43 min |
| Sep 21, 4:21 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 39 min |
| Sep 21, 4:23 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 37 min |
| Sep 21, 4:57 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 31 min |
| Sep 21, 5:03 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 57 min |
| Sep 21, 5:13 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 47 min |
| Sep 21, 5:45 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 45 min |
| Sep 21, 5:52 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 35 min |
| Sep 21, 6:01 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 44 min |
| Sep 21, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 46 min |
| Sep 21, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 55 min |
| Sep 21, 7:11 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 49 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Harrison County8
- Cerro Gordo County6
- Floyd County5
- Monona County4
- Fremont County3
- Mills County3
- Pottawattamie County2
- Montgomery County2
- Page County2
- Lucas County2
- Monroe County2
- Appanoose County2
- Wayne County2
- Cherokee County1
- O'Brien County1
- Plymouth County1
- Sioux County1
- Lyon County1
- Osceola County1
- Des Moines County1
- Crawford County1
- Boone County1
- Greene County1
- Hamilton County1
- Story County1
- Webster County1
- Adair County1
- Dallas County1
- Guthrie County1
- Madison County1
- Sac County1
- Shelby County1
- Allamakee County1
- Clayton County1
- Jasper County1
- Mahaska County1
- Marion County1
- Poweshiek County1
- Butler County1
- Franklin County1
2 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20152017
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.