Alert archive / South Dakota / Sully County
Weather alerts in Sully County, South Dakota, 2023
99 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 99
- Warnings
- 17
- Watches
- 9
- Advisories
- 50
- Busiest month
- July21 alerts
- Busiest day
- June 24, 20234 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, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 8 | 20% | 3 | 67% | 9 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 6 | 3 | 50% | 7 | 57% | 18 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 126 | 71 | 44% | 157 | 73% | 23 min |
| NWS Aberdeen, SD: flash flood warnings | 1 | 0 | 100% | 0 |
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 1, 1:58 PM CST | Winter Weather Advisory | ABR | 64 hr |
| Jan 6, 3:43 AM CST | Dense Fog Advisory | ABR | 32 hr |
| Jan 12, 6:01 PM CST | Dense Fog Advisory | ABR | 15 hr |
| Jan 15, 2:24 PM CST | Winter Weather Advisory | ABR | 36 hr |
| Jan 19, 8:24 PM CST | Dense Fog Advisory | ABR | 10 hr |
| Jan 20, 7:06 PM CST | Dense Fog Advisory | ABR | 15 hr |
| Jan 21, 2:08 PM CST | Dense Fog Advisory | ABR | 22 hr |
| Jan 26, 2:49 AM CST | Wind Advisory | ABR | 30 hr |
| Jan 29, 2:03 PM CST | Wind Chill Advisory | ABR | 44 hr |
| Feb 2, 3:03 PM CST | Wind Chill Advisory | ABR | 21 hr |
| Feb 14, 3:00 AM CST | Winter Weather Advisory | ABR | 27 hr |
| Feb 19, 2:06 PM CST | Winter Storm Watch | ABR | 37 hr |
| Feb 20, 2:45 PM CST | Winter Weather Advisory | ABR | 39 hr |
| Feb 21, 2:41 AM CST | Blizzard Warning | ABR | 57 hr |
| Feb 21, 2:41 AM CST | Winter Storm Warning | ABR | 57 hr |
| Feb 23, 2:39 PM CST | Wind Chill Advisory | ABR | 19 hr |
| Feb 27, 2:24 AM CST | Dense Fog Advisory | ABR | 10 hr |
| Feb 28, 6:06 PM CST | Wind Advisory | ABR | 14 hr |
| Mar 6, 2:51 PM CST | Winter Weather Advisory | ABR | 31 hr |
| Mar 8, 2:59 AM CST | Winter Weather Advisory | ABR | 45 hr |
| Mar 10, 2:50 AM CST | Winter Weather Advisory | ABR | 34 hr |
| Mar 11, 2:16 PM CST | Winter Weather Advisory | ABR | 22 hr |
| Mar 24, 11:13 PM CDT | Dense Fog Advisory | ABR | 13 hr |
| Mar 29, 2:22 PM CDT | Winter Storm Watch | ABR | 24 hr |
| Mar 30, 2:43 PM CDT | Blizzard Warning | ABR | 36 hr |
| Mar 31, 2:53 AM CDT | Winter Weather Advisory | ABR | 9 hr |
| Mar 31, 9:06 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 2, 2:29 AM CDT | Winter Storm Watch | ABR | 35 hr |
| Apr 3, 3:32 AM CDT | Blizzard Warning | ABR | 69 hr |
| Apr 3, 1:47 PM CDT | Winter Weather Advisory | ABR | 65 hr |
| Apr 20, 2:51 AM CDT | Wind Advisory | ABR | 40 hr |
| Apr 27, 3:22 AM CDT | Wind Advisory | ABR | 23 hr |
| May 17, 6:09 PM CDT | Special Weather Statement | ABR | 21 min |
| Jun 15, 6:31 PM CDT | Special Weather Statement | ABR | 29 min |
| Jun 15, 7:06 PM CDT | Severe Thunderstorm Warning | ABR | 23 min |
| Jun 20, 3:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 4:34 PM CDT | Severe Thunderstorm Warning | ABR | 26 min |
| Jun 23, 9:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 23, 9:24 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 23, 11:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 24, 1:15 AM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jun 27, 7:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 11:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 4, 1:25 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 6, 11:19 PM CDT | Special Weather Statement | ABR | 26 min |
| Jul 7, 12:32 AM CDT | Special Weather Statement | ABR | 28 min |
| Jul 7, 2:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 11:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 13, 1:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 3:51 PM CDT | Special Weather Statement | ABR | 24 min |
| Jul 13, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 18, 5:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 6:08 PM CDT | Severe Thunderstorm Warning | ABR | 67 min |
| Jul 18, 6:20 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 6:29 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Jul 25, 3:16 AM CDT | Heat Advisory | ABR | 17 hr |
| Jul 26, 4:02 AM CDT | Heat Advisory | ABR | 16 hr |
| Jul 26, 4:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 26, 5:28 PM CDT | Severe Thunderstorm Warning | ABR | 47 min |
| Jul 26, 6:13 PM CDT | Severe Thunderstorm Warning | ABR | 47 min |
| Jul 30, 11:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 11:35 AM CDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 30, 12:02 PM CDT | Severe Thunderstorm Warning | ABR | 43 min |
| Aug 1, 5:30 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Aug 3, 7:32 PM CDT | Special Weather Statement | ABR | 28 min |
| Aug 17, 2:46 PM CDT | Heat Advisory | ABR | 29 hr |
| Aug 21, 2:21 PM CDT | Heat Advisory | ABR | 30 hr |
| Aug 22, 3:22 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Aug 22, 8:20 PM CDT | Heat Advisory | ABR | 24 hr |
| Aug 23, 2:34 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Aug 24, 2:19 AM CDT | Dense Fog Advisory | ABR | 8 hr |
| Aug 25, 6:15 AM CDT | Dense Fog Advisory | ABR | 4 hr |
| Sep 1, 1:44 PM CDT | Heat Advisory | ABR | 30 hr |
| Sep 4, 9:22 PM CDT | Special Weather Statement | ABR | 38 min |
| Sep 5, 11:11 AM CDT | Wind Advisory | ABR | 7 hr |
| Sep 26, 5:50 AM CDT | Dense Fog Advisory | ABR | 4 hr |
| Sep 27, 5:17 AM CDT | Dense Fog Advisory | ABR | 6 hr |
| Sep 29, 4:42 AM CDT | Special Weather Statement | ABR | 18 min |
| Sep 29, 4:43 AM CDT | Special Weather Statement | ABR | 17 min |
| Sep 30, 4:19 AM CDT | Dense Fog Advisory | ABR | 8 hr |
| Oct 5, 1:38 AM CDT | Freeze Watch | ABR | 24 hr |
| Oct 5, 8:49 PM CDT | Wind Advisory | ABR | 13 hr |
| Oct 6, 2:01 AM CDT | Freeze Warning | ABR | 31 hr |
| Oct 11, 2:54 PM CDT | Wind Advisory | ABR | 48 hr |
| Oct 17, 8:22 PM CDT | Wind Advisory | ABR | 4 hr |
| Oct 18, 3:15 AM CDT | Wind Advisory | ABR | 13 hr |
| Oct 30, 2:43 AM CDT | Wind Advisory | ABR | 21 hr |
| Nov 7, 2:17 AM CST | Dense Fog Advisory | ABR | 10 hr |
| Nov 8, 2:10 AM CST | Wind Advisory | ABR | 15 hr |
| Nov 15, 1:15 PM CST | Wind Advisory | ABR | 29 hr |
| Nov 25, 1:39 PM CST | Wind Advisory | ABR | 24 hr |
| Dec 3, 1:29 PM CST | Wind Advisory | ABR | 28 hr |
| Dec 7, 3:01 AM CST | Wind Advisory | ABR | 60 hr |
| Dec 23, 3:00 PM CST | Winter Storm Watch | ABR | 23 hr |
| Dec 24, 2:12 PM CST | Blizzard Warning | ABR | 52 hr |
| Dec 25, 2:36 PM CST | Winter Storm Warning | ABR | 20 hr |
| Dec 25, 3:31 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 25, 7:56 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 26, 2:56 AM CST | Winter Weather Advisory | ABR | 24 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 | 10 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 9 |
| Winter | |
| Blizzard Warning | 4 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 15 |
| Fog and smoke | |
| Dense Fog Advisory | 15 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.