Flash Flood Watches in South Dakota
151 flash flood watches since 1986. 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 watches reaches back to 2005.
Flash Flood Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Flash Flood Watches
- 151
- Busiest year
- 201026 flash flood watches
- Average year
- 9over 16 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Union County47
- Clay County42
- Lincoln County39
- Meade County36
- Yankton County36
- Lawrence County35
- Pennington County35
- Minnehaha County35
- Turner County35
- Hutchinson County32
- Custer County32
- Bon Homme County31
- Spink County31
- Davison County30
- Hanson County30
- McCook County30
- Butte County28
- Douglas County27
- Hand County27
- Fall River County27
- Charles Mix County26
- Lake County25
- Miner County25
- Sanborn County25
- Aurora County25
- Brown County25
- Clark County25
- Oglala Lakota County25
- Buffalo County24
- Codington County24
- Moody County24
- Brule County23
- Day County23
- Deuel County23
- Hamlin County23
- Hyde County23
- Brookings County22
- Jerauld County22
- Kingsbury County22
- Edmunds County22
26 more counties
- Faulk County22
- Gregory County22
- Marshall County22
- Grant County21
- Jackson County21
- McPherson County21
- Hughes County20
- Roberts County20
- Beadle County19
- Lyman County19
- Potter County19
- Sully County19
- Bennett County18
- Haakon County18
- Harding County18
- Perkins County17
- Jones County15
- Campbell County14
- Walworth County14
- Stanley County13
- Ziebach County13
- Corson County12
- Dewey County11
- Mellette County10
- Todd County10
- Tripp County10
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.