Alert archive / Iowa / Severe Thunderstorm Warnings / 2015
Severe Thunderstorm Warnings in Iowa, September 2015
40 severe thunderstorm warnings in September 2015. 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 2015. Tap one for its archive.
- Severe Thunderstorm Warnings
- 40
- Busiest day
- September 18, 201513 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 6, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Pocahontas | 40 min |
| Sep 6, 6:13 PM CDT | Severe Thunderstorm Warning | DMX | Hancock | 47 min |
| Sep 6, 6:25 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 35 min |
| Sep 6, 6:30 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 45 min |
| Sep 6, 6:52 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene | 53 min |
| Sep 6, 7:19 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 26 min |
| Sep 6, 7:54 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Hamilton, Webster | 30 min |
| Sep 6, 9:12 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Polk | 28 min |
| Sep 6, 9:18 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 27 min |
| Sep 6, 10:05 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 40 min |
| Sep 7, 1:51 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Mahaska, Monroe, Wapello | 54 min |
| Sep 8, 3:06 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 24 min |
| Sep 8, 3:23 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth, Woodbury | 36 min |
| Sep 9, 4:41 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 34 min |
| Sep 9, 5:03 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 42 min |
| Sep 9, 5:48 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 42 min |
| Sep 10, 12:36 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 20 min |
| Sep 10, 7:30 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock | 15 min |
| Sep 10, 8:30 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 30 min |
| Sep 17, 11:47 AM CDT | Severe Thunderstorm Warning | DVN | Johnson, Keokuk, Louisa, Washington | 28 min |
| Sep 17, 7:24 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 36 min |
| Sep 17, 7:50 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 25 min |
| Sep 17, 8:06 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Van Buren | 24 min |
| Sep 17, 8:50 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine, Washington | 25 min |
| Sep 17, 9:14 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 31 min |
| Sep 17, 9:59 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 46 min |
| Sep 18, 12:51 AM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 24 min |
| Sep 18, 9:36 AM CDT | Severe Thunderstorm Warning | OAX | Fremont | 24 min |
| Sep 18, 9:53 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Page | 37 min |
| Sep 18, 10:51 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Marion, Warren | 39 min |
| Sep 18, 11:23 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 26 min |
| Sep 18, 3:37 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 23 min |
| Sep 18, 3:39 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Washington | 41 min |
| Sep 22, 12:12 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 48 min |
| Sep 22, 12:54 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 36 min |
| Sep 22, 1:07 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 38 min |
| Sep 22, 1:39 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 27 min |
| Sep 22, 3:20 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 25 min |
| Sep 22, 3:24 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 36 min |
| Sep 23, 4:46 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 29 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fremont County4
- Calhoun County3
- Hancock County3
- Cerro Gordo County3
- Appanoose County3
- Davis County3
- Osceola County3
- Louisa County3
- Washington County3
- Monona County3
- Harrison County3
- Shelby County2
- Greene County2
- Boone County2
- Wapello County2
- Page County2
- Lyon County2
- Keokuk County2
- Jefferson County2
- Van Buren County2
- Muscatine County2
- Mills County2
- Pottawattamie County2
- Humboldt County1
- Pocahontas County1
- Carroll County1
- Hamilton County1
- Webster County1
- Polk County1
- Dallas County1
- Guthrie County1
- Mahaska County1
- Monroe County1
- Cherokee County1
- Plymouth County1
- Woodbury County1
- O'Brien County1
- Sioux County1
- Winnebago County1
- Worth County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
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.