Alert archive / Iowa / Severe Thunderstorm Warnings / 2017
Severe Thunderstorm Warnings in Iowa, July 2017
65 severe thunderstorm warnings in July 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 July 2017. Tap one for its archive.
- Severe Thunderstorm Warnings
- 65
- Busiest day
- July 21, 201723 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 |
|---|---|---|---|---|
| Jul 3, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 34 min |
| Jul 4, 8:03 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Osceola | 27 min |
| Jul 5, 7:34 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 22 min |
| Jul 5, 9:01 PM CDT | Severe Thunderstorm Warning | DVN | Jones | 44 min |
| Jul 5, 9:41 PM CDT | Severe Thunderstorm Warning | DVN | Linn | 37 min |
| Jul 9, 11:25 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago, Worth | 50 min |
| Jul 10, 12:46 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 44 min |
| Jul 10, 12:50 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 40 min |
| Jul 10, 1:28 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin, Hancock, Winnebago, Wright | 47 min |
| Jul 10, 2:09 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Grundy, Hardin, Wright | 36 min |
| Jul 10, 2:42 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Dubuque, Jackson, Jones | 50 min |
| Jul 10, 2:44 AM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Tama | 46 min |
| Jul 10, 4:48 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 42 min |
| Jul 10, 5:15 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Louisa, Washington | 27 min |
| Jul 10, 6:38 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 67 min |
| Jul 11, 5:40 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Iowa, Jefferson, Johnson, Keokuk, Washington | 50 min |
| Jul 11, 9:44 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 61 min |
| Jul 11, 10:17 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 58 min |
| Jul 11, 11:52 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 53 min |
| Jul 12, 12:37 AM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 52 min |
| Jul 12, 12:57 AM CDT | Severe Thunderstorm Warning | DVN | Jackson | 63 min |
| Jul 12, 9:18 AM CDT | Severe Thunderstorm Warning | ARX | Clayton | 42 min |
| Jul 12, 9:44 AM CDT | Severe Thunderstorm Warning | ARX | Clayton | 22 min |
| Jul 12, 3:40 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 27 min |
| Jul 12, 5:20 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 25 min |
| Jul 12, 5:25 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer | 30 min |
| Jul 12, 5:46 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 26 min |
| Jul 12, 7:27 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Muscatine | 48 min |
| Jul 12, 8:06 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Jones | 39 min |
| Jul 19, 3:46 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Kossuth | 44 min |
| Jul 19, 4:00 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 45 min |
| Jul 19, 4:19 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 56 min |
| Jul 19, 4:25 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 65 min |
| Jul 19, 4:57 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard, Winneshiek | 63 min |
| Jul 19, 5:22 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler | 38 min |
| Jul 19, 5:25 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton, Fayette, Winneshiek | 80 min |
| Jul 19, 5:59 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware, Dubuque | 61 min |
| Jul 19, 6:42 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 78 min |
| Jul 19, 7:03 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson, Jones, Linn | 57 min |
| Jul 20, 7:05 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry | 40 min |
| Jul 20, 7:12 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 26 min |
| Jul 20, 7:19 PM CDT | Severe Thunderstorm Warning | DMX | Greene, Guthrie | 41 min |
| Jul 20, 7:37 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson | 53 min |
| Jul 20, 7:58 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 21 min |
| Jul 20, 8:27 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson | 46 min |
| Jul 20, 8:45 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 31 min |
| Jul 20, 8:57 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie | 48 min |
| Jul 20, 9:19 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Polk, Story | 56 min |
| Jul 20, 9:44 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine, Scott | 46 min |
| Jul 20, 9:46 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Washington | 30 min |
| Jul 20, 10:04 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Jasper, Marshall, Story | 56 min |
| Jul 20, 10:13 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 45 min |
| Jul 20, 10:39 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 35 min |
| Jul 20, 11:29 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek | 31 min |
| Jul 20, 11:39 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa, Keokuk | 27 min |
| Jul 21, 3:51 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Washington | 54 min |
| Jul 21, 4:39 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson | 66 min |
| Jul 21, 5:01 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Jones, Linn | 59 min |
| Jul 21, 5:08 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 35 min |
| Jul 21, 5:24 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 37 min |
| Jul 21, 5:57 PM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 48 min |
| Jul 21, 6:20 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 25 min |
| Jul 21, 11:10 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Clinton, Delaware, Dubuque, Jackson, Jones | 65 min |
| Jul 22, 1:21 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard, Winneshiek | 39 min |
| Jul 22, 3:26 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 26 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Dubuque County9
- Jackson County7
- Jones County6
- Winnebago County6
- Clayton County6
- Hancock County5
- Clinton County5
- Henry County5
- Jefferson County5
- Des Moines County4
- Washington County4
- Iowa County4
- Johnson County4
- Delaware County4
- Fayette County4
- Linn County3
- Worth County3
- Kossuth County3
- Cerro Gordo County3
- Grundy County3
- Hardin County3
- Louisa County3
- Keokuk County3
- Guthrie County3
- Story County3
- Cedar County3
- Muscatine County3
- Winneshiek County3
- Greene County3
- Scott County3
- Plymouth County2
- Lee County2
- Franklin County2
- Wright County2
- Butler County2
- Dallas County2
- Marshall County2
- Bremer County2
- Chickasaw County2
- Howard County2
20 more counties
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. Warning verification from the Mesonet's Cow. Rebuilt daily.