Alert archive / South Dakota / Tornado Warnings / 1999
Tornado Warnings in South Dakota, May 1999
16 tornado warnings in May 1999. 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in May 1999. Tap one for its archive.
- Tornado Warnings
- 16
- Busiest day
- May 10, 19998 tornado 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 3, 9:49 PM CDT | Tornado Warning | FSD | Yankton | 31 min |
| May 3, 10:27 PM CDT | Tornado Warning | FSD | Clay | 33 min |
| May 3, 10:46 PM CDT | Tornado Warning | FSD | Clay | 34 min |
| May 9, 7:32 PM CDT | Tornado Warning | UNR | Tripp | 33 min |
| May 9, 7:39 PM CDT | Tornado Warning | UNR | Mellette | 31 min |
| May 9, 7:40 PM CDT | Tornado Warning | ABR | Lyman | 65 min |
| May 9, 7:55 PM CDT | Tornado Warning | UNR | Mellette, Todd | 50 min |
| May 9, 8:19 PM CDT | Tornado Warning | UNR | Mellette | 61 min |
| May 9, 8:49 PM CDT | Tornado Warning | UNR | Todd | 46 min |
| May 9, 9:26 PM CDT | Tornado Warning | ABR | Lyman | 49 min |
| May 9, 9:31 PM CDT | Tornado Warning | UNR | Todd | 34 min |
| May 15, 5:46 PM CDT | Tornado Warning | UNR | Butte | 49 min |
| May 21, 5:12 PM CDT | Tornado Warning | UNR | Meade, Pennington | 28 min |
| May 21, 6:34 PM CDT | Tornado Warning | UNR | Pennington | 36 min |
| May 21, 6:51 PM CDT | Tornado Warning | UNR | Fall River | 34 min |
| May 22, 5:07 PM CDT | Tornado Warning | FSD | Union | 38 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.