Alert archive / South Dakota / Sully County
Weather alerts in Sully County, South Dakota, 2024
130 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 130
- Warnings
- 36
- Watches
- 21
- Advisories
- 46
- Busiest month
- July24 alerts
- Busiest day
- June 28, 20249 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, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 18 | 13 | 28% | 6 | 83% | 17 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 14 | 3 | 79% | 7 | 100% | 14 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 179 | 95 | 47% | 252 | 74% | 24 min |
| NWS Aberdeen, SD: flash flood warnings | 14 | 7 | 50% | 9 | 78% | 33 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 |
|---|---|---|---|
| Dec 31, 8:34 PM CST | Dense Fog Advisory | ABR | 13 hr |
| Jan 2, 7:02 PM CST | Dense Fog Advisory | ABR | 17 hr |
| Jan 11, 2:39 AM CST | Wind Chill Warning | ABR | 5 days |
| Jan 11, 2:39 AM CST | Wind Chill Advisory | ABR | 51 hr |
| Jan 12, 4:09 AM CST | Winter Weather Advisory | ABR | 44 hr |
| Jan 15, 2:20 AM CST | Wind Chill Advisory | ABR | 34 hr |
| Jan 17, 1:40 PM CST | Winter Weather Advisory | ABR | 36 hr |
| Jan 18, 1:58 PM CST | Wind Chill Advisory | ABR | 21 hr |
| Jan 19, 2:06 PM CST | Wind Chill Advisory | ABR | 22 hr |
| Jan 22, 10:36 PM CST | Dense Fog Advisory | ABR | 4 days |
| Jan 31, 9:48 PM CST | Dense Fog Advisory | ABR | 16 hr |
| Feb 1, 6:06 PM CST | Dense Fog Advisory | ABR | 4 days |
| Feb 6, 5:28 AM CST | Dense Fog Advisory | ABR | 31 hr |
| Feb 7, 7:10 PM CST | Dense Fog Advisory | ABR | 7 hr |
| Feb 13, 1:42 PM CST | Winter Weather Advisory | ABR | 31 hr |
| Feb 26, 2:45 AM CST | Wind Advisory | ABR | 41 hr |
| Mar 2, 2:57 PM CST | Fire Weather Watch | ABR | 11 hr |
| Mar 2, 3:02 PM CST | Wind Advisory | ABR | 27 hr |
| Mar 3, 1:30 AM CST | Dense Fog Advisory | ABR | 8 hr |
| Mar 3, 1:36 AM CST | Red Flag Warning | ABR | 16 hr |
| Mar 15, 2:54 AM CDT | Red Flag Warning | ABR | 17 hr |
| Mar 16, 2:47 AM CDT | Red Flag Warning | ABR | 17 hr |
| Mar 22, 4:20 AM CDT | Winter Storm Watch | ABR | 33 hr |
| Mar 23, 1:08 PM CDT | Winter Storm Warning | ABR | 60 hr |
| Mar 25, 2:55 AM CDT | Winter Weather Advisory | ABR | 28 hr |
| Apr 5, 3:08 AM CDT | Wind Advisory | ABR | 18 hr |
| Apr 5, 1:58 PM CDT | Wind Advisory | ABR | 33 hr |
| Apr 10, 2:57 AM CDT | Fire Weather Watch | ABR | 23 hr |
| Apr 14, 1:39 PM CDT | Fire Weather Watch | ABR | 13 hr |
| Apr 15, 2:13 AM CDT | Red Flag Warning | ABR | 18 hr |
| Apr 21, 2:36 PM CDT | Fire Weather Watch | ABR | 13 hr |
| Apr 22, 3:14 AM CDT | Red Flag Warning | ABR | 17 hr |
| May 4, 2:39 PM CDT | Wind Advisory | ABR | 57 hr |
| May 6, 12:18 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 6, 3:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 7, 9:30 AM CDT | Wind Advisory | ABR | 10 hr |
| May 19, 1:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 19, 5:50 PM CDT | Severe Thunderstorm Warning | ABR | 55 min |
| May 19, 6:33 PM CDT | Severe Thunderstorm Warning | ABR | 42 min |
| May 19, 6:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 19, 7:34 PM CDT | Special Weather Statement | ABR | 26 min |
| May 23, 7:26 PM CDT | Severe Thunderstorm Warning | ABR | 35 min |
| May 23, 7:50 PM CDT | Severe Thunderstorm Warning | ABR | 23 min |
| May 24, 2:55 AM CDT | Wind Advisory | ABR | 16 hr |
| Jun 2, 4:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 2, 4:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 7:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 4, 1:39 PM CDT | Wind Advisory | ABR | 30 hr |
| Jun 10, 6:41 PM CDT | Special Weather Statement | ABR | 49 min |
| Jun 17, 9:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 17, 10:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 6:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 27, 7:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 8:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 27, 9:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 27, 10:08 PM CDT | Severe Thunderstorm Warning | ABR | 67 min |
| Jun 27, 10:15 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jun 27, 10:43 PM CDT | Severe Thunderstorm Warning | ABR | 62 min |
| Jun 27, 10:59 PM CDT | Severe Thunderstorm Warning | ABR | 61 min |
| Jun 27, 11:07 PM CDT | Severe Thunderstorm Warning | ABR | 53 min |
| Jun 28, 12:02 AM CDT | Severe Thunderstorm Warning | ABR | 41 min |
| Jul 1, 2:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 1, 2:36 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 4:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 1, 5:05 PM CDT | Special Weather Statement | ABR | 25 min |
| Jul 12, 2:15 PM CDT | Heat Advisory | ABR | 30 hr |
| Jul 13, 10:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 11:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 12:32 AM CDT | Severe Thunderstorm Warning | ABR | 58 min |
| Jul 14, 1:27 AM CDT | Severe Thunderstorm Warning | ABR | 63 min |
| Jul 14, 1:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:20 AM CDT | Severe Thunderstorm Warning | ABR | 55 min |
| Jul 19, 5:25 AM CDT | Special Weather Statement | ABR | 35 min |
| Jul 19, 5:56 AM CDT | Special Weather Statement | ABR | 34 min |
| Jul 19, 7:06 AM CDT | Severe Thunderstorm Warning | ABR | 24 min |
| Jul 25, 3:18 AM CDT | Heat Advisory | ABR | 17 hr |
| Jul 26, 1:20 PM CDT | Heat Advisory | ABR | 7 hr |
| Jul 27, 8:41 PM CDT | Severe Thunderstorm Warning | ABR | 34 min |
| Jul 28, 2:31 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 29, 2:12 PM CDT | Heat Advisory | ABR | 30 hr |
| Jul 29, 3:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 29, 4:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 29, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 31, 2:07 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 31, 12:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 3:04 AM CDT | Heat Advisory | ABR | 17 hr |
| Aug 14, 3:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 5:16 PM CDT | Severe Thunderstorm Warning | ABR | 27 min |
| Aug 28, 3:51 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 4:41 PM CDT | Tornado Watch | SPC | 6 hr |
| Sep 11, 2:03 PM CDT | Wind Advisory | ABR | 31 hr |
| Sep 12, 3:37 AM CDT | Red Flag Warning | ABR | 18 hr |
| Sep 14, 4:24 AM CDT | Dense Fog Advisory | ABR | 6 hr |
| Sep 14, 1:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 14, 3:29 PM CDT | Special Weather Statement | ABR | 31 min |
| Sep 14, 3:58 PM CDT | Special Weather Statement | ABR | 47 min |
| Sep 14, 9:31 PM CDT | Special Weather Statement | ABR | 29 min |
| Sep 14, 9:36 PM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| Sep 14, 10:23 PM CDT | Severe Thunderstorm Warning | ABR | 20 min |
| Sep 26, 2:08 AM CDT | Red Flag Warning | ABR | 18 hr |
| Sep 28, 3:16 AM CDT | Fire Weather Watch | ABR | 10 hr |
| Sep 28, 1:43 PM CDT | Red Flag Warning | ABR | 54 hr |
| Sep 29, 3:35 AM CDT | Fire Weather Watch | ABR | 11 hr |
| Sep 29, 2:59 PM CDT | Wind Advisory | ABR | 25 hr |
| Sep 30, 1:19 PM CDT | Fire Weather Watch | ABR | 14 hr |
| Oct 1, 3:10 AM CDT | Red Flag Warning | ABR | 40 hr |
| Oct 3, 2:45 PM CDT | Fire Weather Watch | ABR | 21 hr |
| Oct 4, 3:38 AM CDT | Red Flag Warning | ABR | 40 hr |
| Oct 5, 1:58 AM CDT | Wind Advisory | ABR | 16 hr |
| Oct 13, 3:32 AM CDT | Frost Advisory | ABR | 7 hr |
| Oct 13, 10:17 AM CDT | Freeze Warning | ABR | 23 hr |
| Oct 14, 11:11 AM CDT | Freeze Warning | ABR | 23 hr |
| Oct 15, 3:21 AM CDT | Fire Weather Watch | ABR | 11 hr |
| Oct 15, 2:00 PM CDT | Fire Weather Watch | ABR | 23 hr |
| Oct 15, 2:00 PM CDT | Red Flag Warning | ABR | 29 hr |
| Oct 16, 12:44 PM CDT | Red Flag Warning | ABR | 30 hr |
| Nov 2, 4:04 AM CDT | Dense Fog Advisory | ABR | 9 hr |
| Nov 5, 1:39 AM CST | Dense Fog Advisory | ABR | 10 hr |
| Nov 5, 11:58 PM CST | Dense Fog Advisory | ABR | 12 hr |
| Nov 12, 2:06 AM CST | Wind Advisory | ABR | 14 hr |
| Nov 18, 2:04 PM CST | Wind Advisory | ABR | 52 hr |
| Nov 19, 11:37 AM CST | High Wind Warning | ABR | 30 hr |
| Dec 3, 12:58 PM CST | Wind Advisory | ABR | 29 hr |
| Dec 8, 8:27 PM CST | Wind Advisory | ABR | 19 hr |
| Dec 17, 2:55 AM CST | Winter Weather Advisory | ABR | 14 hr |
| Dec 18, 2:05 PM CST | High Wind Warning | ABR | 25 hr |
| Dec 18, 2:05 PM CST | Wind Advisory | ABR | 28 hr |
| Dec 23, 9:24 AM CST | Dense Fog Advisory | ABR | 27 hr |
| Dec 24, 2:54 PM CST | Dense Fog Advisory | ABR | 21 hr |
| Dec 29, 2:28 PM CST | Winter Weather Advisory | ABR | 31 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 | 18 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 8 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 6 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 16 |
| Fire | |
| Red Flag Warning | 12 |
| Fire Weather Watch | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.