Weather alerts in South Dakota, 2025
2,381 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 2,381
- Warnings
- 1,077
- Watches
- 134
- Advisories
- 269
- Busiest month
- July724 alerts
- Busiest day
- June 29, 202582 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
13 of 49 tornado warnings covering South Dakota in 2025 had a tornado report inside them; 17 of 22 tornado reports fell inside a warning, on average 14 minutes after it went out.
South Dakota, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 49 | 13 | 73% | 22 | 77% | 14 min |
| Severe thunderstorm warnings | 785 | 452 | 42% | 1,090 | 78% | 25 min |
| Flash flood warnings | 26 | 11 | 58% | 18 | 72% | 77 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 12 | 2 | 83% | 4 | 75% | 0 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 382 | 214 | 44% | 538 | 78% | 26 min |
| NWS Rapid City, SD: flash flood warnings | 0 | 1 | 0% | |||
| NWS Aberdeen, SD: tornado warnings | 28 | 7 | 75% | 13 | 77% | 19 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 268 | 143 | 47% | 350 | 69% | 24 min |
| NWS Aberdeen, SD: flash flood warnings | 15 | 6 | 60% | 12 | 58% | 96 min |
| NWS Sioux Falls, SD: tornado warnings | 20 | 5 | 75% | 9 | 56% | 8 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 332 | 191 | 42% | 500 | 85% | 22 min |
| NWS Sioux Falls, SD: flash flood warnings | 25 | 9 | 64% | 19 | 74% | 80 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
2,381 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pennington County268
- Meade County239
- Lawrence County214
- Butte County207
- Custer County207
- Oglala Lakota County196
- Jackson County190
- Corson County183
- Bennett County181
- Deuel County181
- Todd County176
- Perkins County176
- Dewey County175
- Union County175
- Codington County174
- Lyman County173
- Charles Mix County171
- Harding County168
- Hamlin County168
- Clay County167
- Edmunds County166
- Tripp County164
- Brookings County163
- Turner County163
- Yankton County163
- Fall River County162
- Brown County162
- Roberts County161
- Hutchinson County159
- Stanley County158
- Lincoln County158
- Gregory County157
- Minnehaha County157
- Marshall County156
- Day County155
- Grant County154
- Haakon County153
- Bon Homme County153
- Hand County152
- Mellette County151
26 more counties
- Brule County151
- Hughes County150
- Hanson County150
- McCook County150
- Faulk County149
- Walworth County149
- McPherson County147
- Aurora County147
- Davison County147
- Moody County145
- Sully County144
- Hyde County144
- Spink County144
- Jones County143
- Beadle County142
- Douglas County142
- Miner County142
- Potter County141
- Ziebach County140
- Lake County140
- Kingsbury County137
- Sanborn County137
- Campbell County136
- Buffalo County132
- Jerauld County132
- Clark County128
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.