Alert archive / Iowa / Severe Thunderstorm Warnings / 2017
Severe Thunderstorm Warnings in Iowa, August 2017
37 severe thunderstorm warnings in August 2017. 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 August 2017. Tap one for its archive.
- Severe Thunderstorm Warnings
- 37
- Busiest day
- August 21, 20179 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 |
|---|---|---|---|---|
| Aug 1, 3:59 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 31 min |
| Aug 1, 4:16 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 29 min |
| Aug 1, 4:30 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 30 min |
| Aug 1, 4:44 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 31 min |
| Aug 1, 5:30 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 14 min |
| Aug 1, 6:09 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 25 min |
| Aug 10, 2:18 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Jones | 42 min |
| Aug 10, 2:57 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 48 min |
| Aug 10, 3:28 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Louisa, Washington | 62 min |
| Aug 10, 3:44 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 31 min |
| Aug 10, 4:19 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 39 min |
| Aug 10, 4:21 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 39 min |
| Aug 10, 4:46 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 44 min |
| Aug 10, 5:33 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 57 min |
| Aug 13, 9:13 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 17 min |
| Aug 15, 2:07 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe | 38 min |
| Aug 18, 6:33 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 42 min |
| Aug 18, 7:45 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 30 min |
| Aug 18, 9:27 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 48 min |
| Aug 18, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 56 min |
| Aug 18, 9:53 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida | 37 min |
| Aug 18, 10:03 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth, Palo Alto, Pocahontas, Webster | 42 min |
| Aug 18, 10:27 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 48 min |
| Aug 18, 11:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Calhoun, Greene, Webster | 36 min |
| Aug 19, 9:30 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 29 min |
| Aug 19, 9:54 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 36 min |
| Aug 20, 11:05 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 40 min |
| Aug 20, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 23 min |
| Aug 21, 1:54 AM CDT | Severe Thunderstorm Warning | FSD | Clay | 24 min |
| Aug 21, 1:55 AM CDT | Severe Thunderstorm Warning | DMX | Emmet, Palo Alto | 35 min |
| Aug 21, 2:07 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Audubon, Cass, Guthrie | 53 min |
| Aug 21, 2:46 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Guthrie, Madison, Union | 44 min |
| Aug 21, 3:30 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Ringgold, Taylor, Union | 32 min |
| Aug 21, 2:02 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Kossuth, Palo Alto | 29 min |
| Aug 21, 2:11 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Plymouth, Sioux | 49 min |
| Aug 26, 1:14 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 31 min |
| Aug 27, 6:27 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene, Webster | 22 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lyon County4
- Osceola County4
- Palo Alto County4
- Webster County4
- Clinton County3
- Calhoun County3
- Adair County3
- Adams County3
- Jackson County2
- Louisa County2
- Des Moines County2
- Sac County2
- Ida County2
- Kossuth County2
- Pocahontas County2
- Greene County2
- Plymouth County2
- Sioux County2
- Carroll County2
- Emmet County2
- Cass County2
- Guthrie County2
- Union County2
- Dickinson County1
- Cedar County1
- Jones County1
- Iowa County1
- Johnson County1
- Washington County1
- Poweshiek County1
- Lucas County1
- Mahaska County1
- Marion County1
- Monroe County1
- Lee County1
- Buena Vista County1
- Cherokee County1
- Humboldt County1
- Boone County1
- Crawford County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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. Rebuilt daily.