Alert archive / Iowa / Severe Thunderstorm Warnings / 1987
Severe Thunderstorm Warnings in Iowa, May 1987
46 severe thunderstorm warnings in May 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 May 1987. Tap one for its archive.
- Severe Thunderstorm Warnings
- 46
- Busiest day
- May 20, 198712 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 |
|---|---|---|---|---|
| May 2, 4:10 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 50 min |
| May 2, 5:23 PM CDT | Severe Thunderstorm Warning | DMX | Jasper | 27 min |
| May 13, 9:17 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Palo Alto | 23 min |
| May 13, 9:57 PM CDT | Severe Thunderstorm Warning | DMX | Emmet, Kossuth | 25 min |
| May 18, 1:48 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Union | 37 min |
| May 18, 5:23 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 67 min |
| May 18, 6:22 PM CDT | Severe Thunderstorm Warning | DMX | Wayne | 50 min |
| May 18, 6:31 PM CDT | Severe Thunderstorm Warning | DMX | Iowa | 29 min |
| May 19, 8:05 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 35 min |
| May 19, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 66 min |
| May 19, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 46 min |
| May 20, 3:27 PM CDT | Severe Thunderstorm Warning | DMX | Union | 33 min |
| May 20, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 30 min |
| May 20, 4:37 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 41 min |
| May 20, 5:10 PM CDT | Severe Thunderstorm Warning | DVN | Scott | 50 min |
| May 20, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 41 min |
| May 20, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 20 min |
| May 20, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 40 min |
| May 20, 6:20 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 60 min |
| May 20, 6:31 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 19 min |
| May 20, 7:00 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 20 min |
| May 21, 5:50 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Van Buren | 40 min |
| May 21, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 31 min |
| May 26, 3:45 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine | 25 min |
| May 26, 5:56 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 49 min |
| May 26, 6:17 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 48 min |
| May 26, 6:17 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 28 min |
| May 26, 6:35 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 50 min |
| May 26, 6:47 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Story | 53 min |
| May 26, 6:49 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 41 min |
| May 26, 6:51 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 49 min |
| May 26, 7:34 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 36 min |
| May 27, 5:38 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 37 min |
| May 27, 9:48 PM CDT | Severe Thunderstorm Warning | DVN | Jones | 57 min |
| May 30, 5:00 PM CDT | Severe Thunderstorm Warning | DMX | Iowa, Keokuk | 25 min |
| May 30, 9:04 PM CDT | Severe Thunderstorm Warning | FSD | Monona | 56 min |
| May 30, 9:34 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 41 min |
| May 31, 3:13 PM CDT | Severe Thunderstorm Warning | DMX | Union | 34 min |
| May 31, 3:13 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 17 min |
| May 31, 4:22 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 38 min |
| May 31, 4:31 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 24 min |
| May 31, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 59 min |
| May 31, 5:19 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Ringgold, Union | 41 min |
| May 31, 5:37 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 38 min |
| May 31, 6:13 PM CDT | Severe Thunderstorm Warning | DMX | Lucas | 47 min |
| May 31, 6:25 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 50 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Union County4
- Clarke County3
- Decatur County3
- Guthrie County3
- Ringgold County3
- Dallas County3
- Polk County2
- Iowa County2
- Bremer County2
- Davis County2
- Van Buren County2
- Appanoose County2
- Lucas County2
- Jasper County1
- Clay County1
- Palo Alto County1
- Emmet County1
- Kossuth County1
- Wayne County1
- Linn County1
- Scott County1
- Mahaska County1
- Black Hawk County1
- Tama County1
- Butler County1
- Cedar County1
- Muscatine County1
- Webster County1
- Boone County1
- Hamilton County1
- Story County1
- Warren County1
- Taylor County1
- Jones County1
- Keokuk County1
- Monona County1
- Mills County1
- Pottawattamie County1
- Adams County1
- Monroe 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.