Alert archive / Iowa / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Iowa, March 2026
46 severe thunderstorm warnings in March 2026. 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 March 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 46
- Busiest day
- March 31, 202614 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 |
|---|---|---|---|---|
| Mar 6, 5:42 PM CST | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Pottawattamie | 37 min |
| Mar 6, 6:10 PM CST | Severe Thunderstorm Warning | DMX | Cass | 34 min |
| Mar 6, 6:21 PM CST | Severe Thunderstorm Warning | OAX | Montgomery | 24 min |
| Mar 6, 7:23 PM CST | Severe Thunderstorm Warning | DMX | Boone, Dallas, Polk | 29 min |
| Mar 6, 8:32 PM CST | Severe Thunderstorm Warning | OAX | Harrison, Monona | 28 min |
| Mar 6, 9:29 PM CST | Severe Thunderstorm Warning | DVN | Benton, Buchanan | 61 min |
| Mar 6, 9:35 PM CST | Severe Thunderstorm Warning | OAX | Pottawattamie | 25 min |
| Mar 10, 5:54 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 51 min |
| Mar 10, 6:01 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 44 min |
| Mar 10, 6:06 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 39 min |
| Mar 10, 6:11 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Van Buren | 64 min |
| Mar 10, 6:40 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jones | 50 min |
| Mar 10, 6:42 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 33 min |
| Mar 10, 6:45 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa | 44 min |
| Mar 10, 6:57 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Muscatine, Scott, Washington | 48 min |
| Mar 10, 6:58 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Washington | 45 min |
| Mar 10, 6:59 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Jones, Linn | 26 min |
| Mar 10, 7:18 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 42 min |
| Mar 10, 7:22 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 38 min |
| Mar 10, 7:23 PM CDT | Severe Thunderstorm Warning | DVN | Louisa | 52 min |
| Mar 10, 7:26 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson, Jones, Linn | 39 min |
| Mar 10, 7:43 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 33 min |
| Mar 10, 7:49 PM CDT | Severe Thunderstorm Warning | DVN | Louisa | 56 min |
| Mar 10, 7:55 PM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 65 min |
| Mar 10, 7:55 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jones | 32 min |
| Mar 10, 8:20 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 27 min |
| Mar 10, 8:59 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 46 min |
| Mar 10, 9:36 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 30 min |
| Mar 15, 9:19 AM CDT | Severe Thunderstorm Warning | DVN | Johnson, Louisa, Washington | 26 min |
| Mar 15, 9:39 AM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine | 33 min |
| Mar 26, 8:56 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee, Van Buren | 49 min |
| Mar 30, 6:03 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk, Story | 27 min |
| Mar 30, 8:44 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 46 min |
| Mar 30, 8:59 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 49 min |
| Mar 30, 9:11 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie, Polk | 49 min |
| Mar 30, 9:53 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Jasper, Marshall, Polk, Story | 67 min |
| Mar 30, 10:36 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 39 min |
| Mar 30, 10:48 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Poweshiek, Story, Tama | 42 min |
| Mar 30, 10:55 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Guthrie | 30 min |
| Mar 31, 12:36 AM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Linn | 22 min |
| Mar 31, 7:15 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Louisa, Washington | 27 min |
| Mar 31, 8:11 AM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine, Washington | 49 min |
| Mar 31, 9:30 AM CDT | Severe Thunderstorm Warning | DVN | Johnson, Louisa, Washington | 45 min |
| Mar 31, 9:34 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Louisa | 30 min |
| Mar 31, 10:10 AM CDT | Severe Thunderstorm Warning | DVN | Louisa, Washington | 35 min |
| Mar 31, 10:23 AM CDT | Severe Thunderstorm Warning | DVN | Louisa, Muscatine | 29 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Louisa County11
- Washington County7
- Dallas County6
- Polk County6
- Des Moines County5
- Johnson County5
- Dubuque County4
- Jones County4
- Clinton County4
- Scott County4
- Cedar County4
- Muscatine County4
- Jackson County4
- Boone County3
- Van Buren County3
- Delaware County3
- Henry County3
- Linn County3
- Story County3
- Guthrie County3
- Montgomery County2
- Pottawattamie County2
- Cass County2
- Davis County2
- Lee County2
- Jasper County2
- Marshall County2
- Fremont County1
- Mills County1
- Harrison County1
- Monona County1
- Benton County1
- Buchanan County1
- Wapello County1
- Jefferson County1
- Adair County1
- Audubon County1
- Greene County1
- Poweshiek County1
- Tama County1
1 more counties
Nearby
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.