Alert archive / Iowa / Frost Advisories / 2026
Frost Advisories in Iowa, May 2026
15 frost advisories in May 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 frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count in May 2026. Tap one for its archive.
- Frost Advisories
- 15
- Busiest day
- May 1, 20264 frost advisories
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 1, 2:16 AM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 13 more | 30 hr |
| May 1, 2:25 AM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 11 hr |
| May 1, 2:34 AM CDT | Frost Advisory | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more | 29 hr |
| May 1, 12:36 PM CDT | Frost Advisory | OAX | Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more | 19 hr |
| May 5, 1:08 PM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 19 hr |
| May 5, 1:19 PM CDT | Frost Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more | 18 hr |
| May 5, 1:31 PM CDT | Frost Advisory | DMX | Bremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock and 7 more | 18 hr |
| May 6, 1:09 PM CDT | Frost Advisory | ARX | Allamakee, Clayton, Fayette, Winneshiek | 19 hr |
| May 6, 1:17 PM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more | 19 hr |
| May 10, 11:57 AM CDT | Frost Advisory | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 8 more | 20 hr |
| May 10, 11:57 AM CDT | Frost Advisory | DVN | Buchanan, Delaware, Dubuque | 19 hr |
| May 10, 12:00 PM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 20 hr |
| May 10, 1:08 PM CDT | Frost Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 2 more | 19 hr |
| May 19, 2:43 AM CDT | Frost Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 29 hr |
| May 19, 11:31 AM CDT | Frost Advisory | OAX | Monona | 20 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allamakee County4
- Clayton County4
- Fayette County4
- Winneshiek County4
- Buchanan County3
- Delaware County3
- Dubuque County3
- Chickasaw County3
- Floyd County3
- Howard County3
- Mitchell County3
- Bremer County3
- Butler County3
- Cerro Gordo County3
- Emmet County3
- Franklin County3
- Hancock County3
- Humboldt County3
- Kossuth County3
- Palo Alto County3
- Pocahontas County3
- Winnebago County3
- Worth County3
- Wright County3
- Buena Vista County3
- Cherokee County3
- Clay County3
- Dickinson County3
- Lyon County3
- O'Brien County3
- Osceola County3
- Sioux County3
- Benton County2
- Cedar County2
- Clinton County2
- Iowa County2
- Jackson County2
- Johnson County2
- Jones County2
- Linn County2
57 more counties
- Muscatine County2
- Scott County2
- Black Hawk County2
- Plymouth County2
- Henry County1
- Jefferson County1
- Keokuk County1
- Louisa County1
- Van Buren County1
- Washington County1
- Adair County1
- Adams County1
- Appanoose County1
- Audubon County1
- Boone County1
- Calhoun County1
- Carroll County1
- Cass County1
- Clarke County1
- Crawford County1
- Dallas County1
- Davis County1
- Decatur County1
- Greene County1
- Grundy County1
- Guthrie County1
- Hamilton County1
- Hardin County1
- Jasper County1
- Lucas County1
- Madison County1
- Mahaska County1
- Marion County1
- Marshall County1
- Monroe County1
- Polk County1
- Poweshiek County1
- Ringgold County1
- Sac County1
- Story County1
- Tama County1
- Taylor County1
- Union County1
- Wapello County1
- Warren County1
- Wayne County1
- Webster County1
- Fremont County1
- Harrison County1
- Mills County1
- Montgomery County1
- Page County1
- Pottawattamie County1
- Shelby County1
- Ida County1
- Woodbury County1
- Monona County1
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.