Alert archive / Iowa / Severe Thunderstorm Warnings / 1987
Severe Thunderstorm Warnings in Iowa, July 1987
63 severe thunderstorm warnings in July 1987. 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 1987. Tap one for its archive.
- Severe Thunderstorm Warnings
- 63
- Busiest day
- July 6, 198711 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 5, 5:05 PM CDT | Severe Thunderstorm Warning | FSD | Monona, Woodbury | 55 min |
| Jul 5, 6:11 PM CDT | Severe Thunderstorm Warning | FSD | Monona, Woodbury | 64 min |
| Jul 6, 12:35 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jones | 55 min |
| Jul 6, 12:55 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 65 min |
| Jul 6, 2:31 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 59 min |
| Jul 6, 3:22 PM CDT | Severe Thunderstorm Warning | DMX | Benton, Linn | 38 min |
| Jul 6, 3:25 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 50 min |
| Jul 6, 3:58 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 47 min |
| Jul 6, 4:30 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 45 min |
| Jul 6, 4:35 PM CDT | Severe Thunderstorm Warning | DVN | Jones | 55 min |
| Jul 6, 5:16 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 44 min |
| Jul 6, 6:06 PM CDT | Severe Thunderstorm Warning | DVN | Cedar | 39 min |
| Jul 6, 6:09 PM CDT | Severe Thunderstorm Warning | DMX | Johnson | 41 min |
| Jul 6, 7:27 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 33 min |
| Jul 7, 12:33 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 57 min |
| Jul 7, 1:00 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola, Sioux | 60 min |
| Jul 7, 1:07 AM CDT | Severe Thunderstorm Warning | FSD | Monona, Woodbury | 53 min |
| Jul 7, 1:07 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 53 min |
| Jul 7, 1:27 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 63 min |
| Jul 7, 1:46 AM CDT | Severe Thunderstorm Warning | FSD | Ida | 59 min |
| Jul 7, 2:06 AM CDT | Severe Thunderstorm Warning | DMX | Buena Vista, Clay | 84 min |
| Jul 7, 2:08 AM CDT | Severe Thunderstorm Warning | FSD | Monona | 37 min |
| Jul 8, 2:17 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 43 min |
| Jul 8, 6:03 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 27 min |
| Jul 8, 6:06 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy | 54 min |
| Jul 8, 7:06 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 39 min |
| Jul 8, 7:27 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 38 min |
| Jul 8, 8:05 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 30 min |
| Jul 9, 1:32 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 58 min |
| Jul 11, 4:06 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 54 min |
| Jul 11, 5:50 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 40 min |
| Jul 11, 3:43 PM CDT | Severe Thunderstorm Warning | DMX | Dickinson, Emmet | 32 min |
| Jul 11, 3:58 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 62 min |
| Jul 11, 4:09 PM CDT | Severe Thunderstorm Warning | DMX | Dickinson | 31 min |
| Jul 11, 4:20 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 40 min |
| Jul 11, 5:00 PM CDT | Severe Thunderstorm Warning | FSD | Osceola, Sioux | 30 min |
| Jul 11, 7:56 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 64 min |
| Jul 11, 8:54 PM CDT | Severe Thunderstorm Warning | DMX | Buena Vista, Pocahontas | 36 min |
| Jul 11, 10:22 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 68 min |
| Jul 11, 10:54 PM CDT | Severe Thunderstorm Warning | FSD | Osceola | 66 min |
| Jul 11, 11:30 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 40 min |
| Jul 11, 11:33 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 57 min |
| Jul 11, 11:50 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy | 55 min |
| Jul 14, 4:08 PM CDT | Severe Thunderstorm Warning | DMX | Mitchell, Worth | 67 min |
| Jul 14, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 38 min |
| Jul 14, 7:25 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 35 min |
| Jul 14, 7:42 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 63 min |
| Jul 14, 10:15 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 35 min |
| Jul 20, 11:33 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 57 min |
| Jul 21, 5:12 PM CDT | Severe Thunderstorm Warning | DVN | Clinton | 48 min |
| Jul 21, 6:03 PM CDT | Severe Thunderstorm Warning | DVN | Scott | 57 min |
| Jul 24, 5:59 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 61 min |
| Jul 24, 6:00 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene | 60 min |
| Jul 24, 6:40 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 30 min |
| Jul 24, 7:11 PM CDT | Severe Thunderstorm Warning | DMX | Story | 64 min |
| Jul 24, 7:49 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 41 min |
| Jul 24, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 30 min |
| Jul 24, 8:25 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 35 min |
| Jul 24, 9:06 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene | 39 min |
| Jul 24, 10:30 PM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 30 min |
| Jul 26, 1:26 PM CDT | Severe Thunderstorm Warning | DMX | Winneshiek | 49 min |
| Jul 29, 6:16 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 14 min |
| Jul 29, 7:27 PM CDT | Severe Thunderstorm Warning | DMX | Allamakee | 48 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Linn County6
- Lyon County5
- Sioux County5
- Monona County4
- Woodbury County4
- Black Hawk County3
- Osceola County3
- Jones County2
- Benton County2
- Johnson County2
- Buena Vista County2
- Grundy County2
- Kossuth County2
- Dickinson County2
- Emmet County2
- Story County2
- Clinton County2
- Scott County2
- Greene County2
- Boone County2
- Polk County2
- Dubuque County1
- Jackson County1
- Buchanan County1
- Cedar County1
- Mahaska County1
- Plymouth County1
- Cherokee County1
- O'Brien County1
- Ida County1
- Clay County1
- Guthrie County1
- Louisa County1
- Muscatine County1
- Pottawattamie County1
- Chickasaw County1
- Pocahontas County1
- Marshall County1
- Harrison County1
- Mitchell County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive19861988
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.