Alert archive / Iowa / Severe Thunderstorm Warnings / 2020
Severe Thunderstorm Warnings in Iowa, May 2020
38 severe thunderstorm warnings in May 2020. 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 2020. Tap one for its archive.
- Severe Thunderstorm Warnings
- 38
- Busiest day
- May 14, 202010 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 14, 3:35 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Dallas, Guthrie, Madison | 40 min |
| May 14, 4:08 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Warren | 52 min |
| May 14, 5:01 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Warren | 29 min |
| May 14, 5:14 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Marion, Monroe, Warren | 46 min |
| May 14, 5:29 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Marion, Warren | 31 min |
| May 14, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Union, Warren | 31 min |
| May 14, 5:57 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Marion, Monroe | 48 min |
| May 14, 6:20 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Monroe, Wapello | 40 min |
| May 14, 6:33 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk | 57 min |
| May 14, 6:56 PM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Monroe, Wapello | 49 min |
| May 14, 7:24 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Washington | 51 min |
| May 14, 7:39 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Louisa, Washington | 36 min |
| May 14, 8:11 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa, Washington | 49 min |
| May 14, 8:12 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 18 min |
| May 14, 8:36 PM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 39 min |
| May 14, 9:12 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine, Scott | 33 min |
| May 14, 9:27 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee | 33 min |
| May 14, 10:42 PM CDT | Severe Thunderstorm Warning | DVN | Lee, Van Buren | 33 min |
| May 16, 5:47 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 43 min |
| May 16, 10:35 PM CDT | Severe Thunderstorm Warning | DMX | Greene, Guthrie | 25 min |
| May 23, 6:29 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk, Washington | 31 min |
| May 24, 3:50 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 55 min |
| May 24, 4:26 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Pottawattamie | 49 min |
| May 24, 5:12 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Pottawattamie, Shelby | 33 min |
| May 24, 5:38 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 52 min |
| May 24, 5:47 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 43 min |
| May 24, 6:26 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 49 min |
| May 24, 3:48 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 57 min |
| May 24, 3:52 PM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 53 min |
| May 25, 5:24 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall | 37 min |
| May 25, 5:31 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Wayne | 44 min |
| May 25, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin, Wright | 31 min |
| May 26, 1:44 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Keokuk, Washington | 31 min |
| May 26, 2:01 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa, Johnson | 32 min |
| May 26, 2:17 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 13 min |
| May 26, 3:37 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine | 38 min |
| May 26, 4:35 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson | 25 min |
| May 26, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 30 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clarke County5
- Warren County5
- Washington County5
- Lucas County4
- Monroe County4
- Jefferson County4
- Keokuk County4
- Henry County4
- Marion County3
- Mahaska County3
- Wapello County3
- Louisa County3
- Muscatine County3
- Mills County3
- Harrison County3
- Pottawattamie County3
- Guthrie County2
- Madison County2
- Des Moines County2
- Davis County2
- Lee County2
- Van Buren County2
- Monona County2
- Shelby County2
- Fremont County2
- Montgomery County2
- Page County2
- Johnson County2
- Cedar County2
- Adair County1
- Dallas County1
- Union County1
- Scott County1
- Greene County1
- Plymouth County1
- Woodbury County1
- Jasper County1
- Marshall County1
- Decatur County1
- Wayne County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.