Alert archive / South Dakota / Sully County
Weather alerts in Sully County, South Dakota, 2025
144 weather alerts in 2025, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sully County and its neighbors
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Alerts
- 144
- Warnings
- 40
- Watches
- 23
- Advisories
- 53
- Busiest month
- July30 alerts
- Busiest day
- July 23, 20256 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sully County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 17 | 26% | 7 | 57% | 25 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| 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 |
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
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 | Lasted |
|---|---|---|---|
| Jan 3, 3:25 AM CST | Winter Weather Advisory | ABR | 51 hr |
| Jan 16, 12:57 PM CST | Wind Advisory | ABR | 30 hr |
| Jan 17, 2:01 PM CST | Cold Weather Advisory | ABR | 46 hr |
| Jan 18, 1:36 PM CST | Cold Weather Advisory | ABR | 70 hr |
| Jan 18, 1:36 PM CST | Extreme Cold Warning | ABR | 70 hr |
| Feb 10, 2:21 AM CST | Cold Weather Advisory | ABR | 34 hr |
| Feb 12, 3:14 AM CST | Cold Weather Advisory | ABR | 30 hr |
| Feb 16, 1:23 AM CST | Extreme Cold Warning | ABR | 3 days |
| Feb 19, 2:07 AM CST | Cold Weather Advisory | ABR | 32 hr |
| Feb 24, 2:02 AM CST | Wind Advisory | ABR | 16 hr |
| Feb 27, 1:13 PM CST | Wind Advisory | ABR | 29 hr |
| Feb 28, 3:12 AM CST | Red Flag Warning | ABR | 15 hr |
| Mar 3, 2:11 PM CST | Winter Weather Advisory | ABR | 36 hr |
| Mar 4, 1:51 PM CST | Wind Advisory | ABR | 7 hr |
| Mar 8, 2:30 AM CST | Fire Weather Watch | ABR | 24 hr |
| Mar 9, 3:11 AM CDT | Red Flag Warning | ABR | 16 hr |
| Mar 9, 3:11 AM CDT | Red Flag Warning | ABR | 41 hr |
| Mar 12, 2:59 AM CDT | Fire Weather Watch | ABR | 12 hr |
| Mar 12, 2:50 PM CDT | Red Flag Warning | ABR | 29 hr |
| Mar 13, 3:17 PM CDT | Wind Advisory | ABR | 47 hr |
| Mar 14, 1:08 PM CDT | High Wind Warning | ABR | 13 hr |
| Mar 22, 2:34 PM CDT | Wind Advisory | ABR | 28 hr |
| Mar 29, 2:39 AM CDT | Winter Weather Advisory | ABR | 25 hr |
| Apr 8, 11:46 AM CDT | Fire Weather Watch | ABR | 14 hr |
| Apr 9, 2:00 AM CDT | Red Flag Warning | ABR | 18 hr |
| Apr 10, 2:02 AM CDT | Red Flag Warning | ABR | 18 hr |
| Apr 11, 1:11 PM CDT | Red Flag Warning | ABR | 7 hr |
| Apr 12, 3:10 AM CDT | High Wind Watch | ABR | 23 hr |
| Apr 12, 2:30 PM CDT | Fire Weather Watch | ABR | 12 hr |
| Apr 13, 2:21 AM CDT | High Wind Warning | ABR | 23 hr |
| Apr 13, 2:21 AM CDT | Wind Advisory | ABR | 25 hr |
| Apr 13, 2:27 AM CDT | Red Flag Warning | ABR | 18 hr |
| Apr 14, 3:24 AM CDT | Wind Advisory | ABR | 16 hr |
| Apr 21, 6:10 PM CDT | Special Weather Statement | ABR | 50 min |
| May 8, 2:52 PM CDT | Fire Weather Watch | ABR | 48 hr |
| May 9, 1:26 PM CDT | Fire Weather Watch | ABR | 13 hr |
| May 10, 2:14 AM CDT | Red Flag Warning | ABR | 67 hr |
| May 10, 2:31 PM CDT | Fire Weather Watch | ABR | 24 hr |
| May 14, 1:34 PM CDT | Wind Advisory | ABR | 53 hr |
| May 14, 2:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 3:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 14, 7:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 15, 3:21 AM CDT | High Wind Warning | ABR | 40 hr |
| May 15, 7:05 PM CDT | Wind Advisory | ABR | 24 hr |
| May 19, 2:19 AM CDT | Wind Advisory | ABR | 23 hr |
| Jun 7, 5:12 PM CDT | Special Weather Statement | ABR | 63 min |
| Jun 8, 11:24 AM CDT | Wind Advisory | ABR | 9 hr |
| Jun 15, 7:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 15, 7:51 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 16, 4:07 AM CDT | Special Weather Statement | ABR | 68 min |
| Jun 18, 2:26 PM CDT | Extreme Heat Watch | ABR | 23 hr |
| Jun 19, 1:27 PM CDT | Heat Advisory | ABR | 32 hr |
| Jun 27, 5:02 AM CDT | Dense Fog Advisory | ABR | 5 hr |
| Jun 27, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 27, 9:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 27, 9:19 PM CDT | Severe Thunderstorm Warning | ABR | 56 min |
| Jun 27, 9:39 PM CDT | Severe Thunderstorm Warning | ABR | 51 min |
| Jun 27, 10:15 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jun 29, 3:55 AM CDT | Special Weather Statement | ABR | 35 min |
| Jun 29, 4:37 AM CDT | Special Weather Statement | ABR | 38 min |
| Jun 29, 5:20 AM CDT | Severe Thunderstorm Warning | ABR | 55 min |
| Jul 9, 1:46 PM CDT | Heat Advisory | ABR | 6 hr |
| Jul 9, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 6:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 9, 7:23 PM CDT | Severe Thunderstorm Warning | ABR | 52 min |
| Jul 9, 8:00 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jul 9, 8:10 PM CDT | Severe Thunderstorm Warning | ABR | 65 min |
| Jul 14, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 6:32 PM CDT | Special Weather Statement | ABR | 28 min |
| Jul 14, 6:53 PM CDT | Severe Thunderstorm Warning | ABR | 52 min |
| Jul 14, 8:56 PM CDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 20, 2:31 PM CDT | Heat Advisory | ABR | 29 hr |
| Jul 22, 1:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 22, 2:40 AM CDT | Heat Advisory | ABR | 16 hr |
| Jul 22, 3:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 22, 3:39 PM CDT | Special Weather Statement | ABR | 36 min |
| Jul 23, 5:24 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 5:58 AM CDT | Severe Thunderstorm Warning | ABR | 47 min |
| Jul 23, 6:44 AM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Jul 23, 7:27 AM CDT | Severe Thunderstorm Warning | ABR | 48 min |
| Jul 23, 8:26 AM CDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 23, 9:06 AM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| Jul 25, 2:31 AM CDT | Heat Advisory | ABR | 41 hr |
| Jul 26, 2:14 AM CDT | Heat Advisory | ABR | 42 hr |
| Jul 26, 3:50 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 7:52 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 8:11 PM CDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 26, 8:44 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Jul 26, 9:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 3:46 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 4:08 PM CDT | Severe Thunderstorm Warning | ABR | 67 min |
| Aug 1, 2:13 PM CDT | Flood Watch | ABR | 10 hr |
| Aug 5, 4:03 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 5, 8:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 10:41 PM CDT | Severe Thunderstorm Warning | ABR | 35 min |
| Aug 7, 1:55 AM CDT | Heat Advisory | ABR | 18 hr |
| Aug 7, 7:02 AM CDT | Dense Fog Advisory | ABR | 3 hr |
| Aug 7, 5:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 3:29 AM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Aug 8, 4:01 AM CDT | Severe Thunderstorm Warning | ABR | 28 min |
| Aug 13, 7:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 13, 7:45 PM CDT | Severe Thunderstorm Warning | ABR | 60 min |
| Aug 14, 1:48 AM CDT | Heat Advisory | ABR | 17 hr |
| Aug 15, 3:32 AM CDT | Special Weather Statement | ABR | 28 min |
| Aug 15, 8:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 15, 11:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 16, 10:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 10:59 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 17, 2:47 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 17, 3:59 AM CDT | Special Weather Statement | ABR | 61 min |
| Aug 18, 3:08 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Aug 18, 4:46 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 18, 7:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 2:31 AM CDT | Heat Advisory | ABR | 17 hr |
| Aug 21, 11:57 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 22, 12:05 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 6:22 AM CDT | Dense Fog Advisory | ABR | 5 hr |
| Sep 3, 2:45 PM CDT | Wind Advisory | ABR | 30 hr |
| Sep 5, 2:03 PM CDT | Frost Advisory | ABR | 19 hr |
| Sep 6, 2:22 PM CDT | Frost Advisory | ABR | 19 hr |
| Sep 10, 2:45 AM CDT | Dense Fog Advisory | ABR | 8 hr |
| Sep 13, 3:55 AM CDT | Severe Thunderstorm Warning | ABR | 50 min |
| Sep 13, 4:33 AM CDT | Severe Thunderstorm Warning | ABR | 30 min |
| Sep 14, 8:35 AM CDT | Dense Fog Advisory | ABR | 2 hr |
| Oct 12, 2:03 PM CDT | Frost Advisory | ABR | 20 hr |
| Oct 15, 1:06 AM CDT | Dense Fog Advisory | ABR | 9 hr |
| Oct 19, 2:14 PM CDT | Wind Advisory | ABR | 41 hr |
| Oct 25, 4:51 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Oct 25, 2:00 PM CDT | Wind Advisory | ABR | 27 hr |
| Nov 21, 3:54 AM CST | Dense Fog Advisory | ABR | 7 hr |
| Nov 24, 1:33 PM CST | Wind Advisory | ABR | 30 hr |
| Nov 27, 1:52 PM CST | Winter Storm Warning | ABR | 46 hr |
| Nov 27, 1:52 PM CST | Winter Weather Advisory | ABR | 52 hr |
| Dec 2, 11:08 AM CST | Winter Weather Advisory | ABR | 3 hr |
| Dec 7, 1:20 PM CST | High Wind Watch | ABR | 25 hr |
| Dec 8, 5:34 AM CST | Dense Fog Advisory | ABR | 4 hr |
| Dec 8, 2:01 PM CST | High Wind Warning | ABR | 40 hr |
| Dec 9, 1:17 PM CST | Winter Weather Advisory | ABR | 53 hr |
| Dec 12, 1:51 AM CST | Winter Weather Advisory | ABR | 31 hr |
| Dec 16, 2:01 PM CST | High Wind Watch | ABR | 12 hr |
| Dec 17, 2:22 AM CST | High Wind Warning | ABR | 40 hr |
| Dec 24, 8:45 PM CST | Dense Fog Advisory | ABR | 45 hr |
| Dec 27, 4:27 AM CST | Wind Advisory | ABR | 47 hr |
| Dec 27, 6:52 PM CST | Winter Weather Advisory | ABR | 32 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 23 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 9 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Extreme Heat Watch | 1 |
| Heat Advisory | 9 |
| Cold | |
| Extreme Cold Warning | 2 |
| Cold Weather Advisory | 5 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 3 |
| Wind Advisory | 17 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.