Alert archive / South Dakota / Flash Flood Warnings
Flash Flood Warnings in South Dakota, 2026
21 flash flood warnings in 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Flash Flood Warnings
- 21
- Busiest month
- July10 flash flood warnings
- Busiest day
- July 30, 20264 flash flood warnings
Over time
By month
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 17, 1:10 AM CDT | Flash Flood Warning | FSD | Union | 4 hr |
| May 24, 11:29 PM CDT | Flash Flood Warning | FSD | Minnehaha | 72 min |
| May 31, 5:51 PM CDT | Flash Flood Warning | FSD | Hanson, Hutchinson, McCook | 3 hr |
| May 31, 7:10 PM CDT | Flash Flood Warning | ABR | McPherson | 3 hr |
| Jun 2, 3:58 PM CDT | Flash Flood Warning | UNR | Fall River, Oglala Lakota | 6 hr |
| Jun 2, 4:26 PM CDT | Flash Flood Warning | UNR | Jackson | 4 hr |
| Jun 2, 6:39 PM CDT | Flash Flood Warning | UNR | Custer, Oglala Lakota | 3 hr |
| Jul 3, 1:00 AM CDT | Flash Flood Warning | FSD | Bon Homme, Clay, Union, Yankton | 3 hr |
| Jul 3, 2:14 AM CDT | Flash Flood Warning | FSD | Union | 3 hr |
| Jul 8, 1:43 AM CDT | Flash Flood Warning | ABR | Brown | 6 hr |
| Jul 18, 3:01 PM CDT | Flash Flood Warning | UNR | Lawrence | 72 min |
| Jul 30, 4:09 PM CDT | Flash Flood Warning | ABR | Lyman | 6 hr |
| Jul 30, 4:17 PM CDT | Flash Flood Warning | ABR | Day | 6 hr |
| Jul 30, 4:51 PM CDT | Flash Flood Warning | ABR | Brown, Day | 6 hr |
| Jul 30, 6:25 PM CDT | Flash Flood Warning | ABR | Day, Marshall, Roberts | 6 hr |
| Jul 30, 9:50 PM CDT | Flash Flood Warning | ABR | Hughes, Stanley | 3 hr |
| Jul 30, 11:34 PM CDT | Flash Flood Warning | FSD | Kingsbury | 3 hr |
| Aug 20, 8:14 PM CDT | Flash Flood Warning | FSD | Lincoln, Turner | 96 min |
| Sep 5, 4:38 AM CDT | Flash Flood Warning | FSD | Davison, Hanson, Hutchinson | 3 hr |
| Sep 6, 2:07 PM CDT | Flash Flood Warning | FSD | Brookings, Minnehaha, Moody | 4 hr |
| Sep 7, 8:07 PM CDT | Flash Flood Warning | FSD | Charles Mix | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Union County3
- Day County3
- Minnehaha County2
- Hanson County2
- Hutchinson County2
- Oglala Lakota County2
- Brown County2
- McCook County1
- McPherson County1
- Fall River County1
- Jackson County1
- Custer County1
- Bon Homme County1
- Clay County1
- Yankton County1
- Lawrence County1
- Lyman County1
- Marshall County1
- Roberts County1
- Hughes County1
- Stanley County1
- Kingsbury County1
- Lincoln County1
- Turner County1
- Davison County1
- Brookings County1
- Moody County1
- Charles Mix County1
The busiest days
Days with the most alerts issued, by UTC date.
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.