Alert archive / South Dakota / Davison County
Weather alerts in Davison County, South Dakota, 2023
119 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Davison County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 119
- Warnings
- 30
- Watches
- 16
- Advisories
- 44
- Busiest month
- July34 alerts
- Busiest day
- July 26, 20239 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Davison County in 2023 had a tornado report inside them.
Davison County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 9 | 47% | 12 | 100% | 21 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 Sioux Falls, SD: tornado warnings | 23 | 6 | 74% | 16 | 50% | 13 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 228 | 126 | 45% | 282 | 82% | 18 min |
| NWS Sioux Falls, SD: flash flood warnings | 9 | 3 | 67% | 12 | 75% | 47 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 1, 2:10 PM CST | Winter Storm Warning | FSD | 61 hr |
| Jan 3, 12:06 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 3, 3:04 AM CST | Winter Weather Advisory | FSD | 45 hr |
| Jan 3, 6:09 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 5, 9:55 PM CST | Dense Fog Advisory | FSD | 14 hr |
| Jan 6, 10:05 PM CST | Dense Fog Advisory | FSD | 14 hr |
| Jan 8, 5:04 AM CST | Dense Fog Advisory | FSD | 4 hr |
| Jan 11, 3:18 AM CST | Dense Fog Advisory | FSD | 11 hr |
| Jan 12, 6:49 PM CST | Dense Fog Advisory | FSD | 17 hr |
| Jan 17, 3:11 PM CST | Winter Weather Advisory | FSD | 42 hr |
| Jan 20, 10:08 PM CST | Dense Fog Advisory | FSD | 5 hr |
| Jan 21, 5:56 PM CST | Dense Fog Advisory | FSD | 18 hr |
| Jan 26, 3:40 AM CST | Wind Advisory | FSD | 29 hr |
| Jan 27, 3:12 AM CST | Winter Weather Advisory | FSD | 39 hr |
| Jan 28, 1:41 PM CST | Wind Chill Advisory | FSD | 20 hr |
| Jan 29, 1:48 PM CST | Wind Chill Advisory | FSD | 22 hr |
| Jan 30, 2:28 PM CST | Wind Chill Advisory | FSD | 20 hr |
| Feb 9, 2:50 AM CST | Wind Advisory | FSD | 14 hr |
| Feb 14, 2:51 AM CST | Winter Weather Advisory | FSD | 30 hr |
| Feb 18, 11:40 PM CST | Dense Fog Advisory | FSD | 6 hr |
| Feb 19, 2:50 PM CST | Winter Storm Watch | FSD | 36 hr |
| Feb 19, 11:55 PM CST | Dense Fog Advisory | FSD | 6 hr |
| Feb 20, 3:01 PM CST | Winter Weather Advisory | FSD | 38 hr |
| Feb 21, 2:52 AM CST | Blizzard Warning | FSD | 57 hr |
| Feb 22, 11:45 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 23, 2:25 PM CST | Wind Chill Advisory | FSD | 20 hr |
| Feb 27, 2:19 AM CST | Dense Fog Advisory | FSD | 10 hr |
| Feb 28, 3:00 PM CST | Wind Advisory | FSD | 21 hr |
| Mar 8, 3:30 AM CST | Winter Weather Advisory | FSD | 45 hr |
| Mar 11, 2:41 PM CST | Wind Advisory | FSD | 18 hr |
| Mar 15, 3:29 AM CDT | Winter Storm Watch | FSD | 12 hr |
| Mar 15, 3:26 PM CDT | Winter Weather Advisory | FSD | 40 hr |
| Mar 29, 2:39 PM CDT | Winter Storm Watch | FSD | 24 hr |
| Mar 30, 3:01 PM CDT | Blizzard Warning | FSD | 38 hr |
| Mar 30, 3:01 PM CDT | Winter Weather Advisory | FSD | 38 hr |
| Mar 31, 9:06 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 2, 3:03 AM CDT | Winter Storm Watch | FSD | 36 hr |
| Apr 3, 2:42 PM CDT | Winter Weather Advisory | FSD | 45 hr |
| Apr 10, 3:30 AM CDT | Fire Weather Watch | FSD | 10 hr |
| Apr 10, 1:44 PM CDT | Red Flag Warning | FSD | 31 hr |
| Apr 12, 3:16 PM CDT | Red Flag Warning | FSD | 29 hr |
| Apr 14, 10:42 PM CDT | River Flood Warning | FSD | 63 days |
| Apr 15, 2:27 PM CDT | Wind Advisory | FSD | 29 hr |
| Apr 18, 1:09 PM CDT | Fire Weather Watch | FSD | 4 min |
| Apr 18, 1:13 PM CDT | Red Flag Warning | FSD | 8 hr |
| May 6, 5:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 12, 12:17 PM CDT | Mesoscale Discussion | SPC | 118 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, 2:35 AM CDT | Severe Thunderstorm Warning | FSD | 40 min |
| Jun 24, 3:17 AM CDT | Severe Thunderstorm Warning | FSD | 28 min |
| Jun 24, 3:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 27, 7:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 3:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 3, 11:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 4, 1:25 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 11, 11:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 12, 12:10 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 2:17 AM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 12, 2:36 AM CDT | Severe Thunderstorm Warning | FSD | 24 min |
| Jul 12, 2:39 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 12, 2:54 AM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Jul 13, 1:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 14, 5:29 PM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Jul 14, 5:55 PM CDT | Severe Thunderstorm Warning | FSD | 50 min |
| Jul 18, 8:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 18, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 19, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 1:28 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 2:08 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 2:35 AM CDT | Severe Thunderstorm Warning | FSD | 40 min |
| Jul 24, 2:58 AM CDT | Severe Thunderstorm Warning | FSD | 17 min |
| Jul 25, 6:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 25, 7:14 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 9:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 9:28 PM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| Jul 25, 10:01 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Jul 25, 10:11 PM CDT | Tornado Warning | FSD | 17 min |
| Jul 25, 10:13 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Jul 25, 10:39 PM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Jul 26, 4:14 AM CDT | Heat Advisory | FSD | 16 hr |
| Jul 26, 2:50 PM CDT | Heat Advisory | FSD | 29 hr |
| Jul 27, 8:55 AM CDT | Excessive Heat Warning | FSD | 11 hr |
| Jul 30, 11:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 12:06 PM CDT | Severe Thunderstorm Warning | FSD | 24 min |
| Jul 30, 12:27 PM CDT | Severe Thunderstorm Warning | FSD | 33 min |
| Aug 5, 2:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 5, 3:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Aug 10, 3:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 10, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 6:25 PM CDT | Severe Thunderstorm Warning | FSD | 35 min |
| Aug 10, 6:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 6:52 PM CDT | Severe Thunderstorm Warning | FSD | 38 min |
| Aug 18, 2:40 PM CDT | Heat Advisory | FSD | 30 hr |
| Aug 19, 2:45 PM CDT | Excessive Heat Watch | FSD | 24 hr |
| Aug 20, 2:41 PM CDT | Excessive Heat Warning | FSD | 4 days |
| Sep 1, 2:09 PM CDT | Heat Advisory | FSD | 53 hr |
| Sep 27, 4:19 AM CDT | Dense Fog Advisory | FSD | 7 hr |
| Sep 30, 4:27 AM CDT | Dense Fog Advisory | FSD | 5 hr |
| Oct 5, 3:08 AM CDT | Freeze Watch | FSD | 24 hr |
| Oct 5, 2:26 PM CDT | Wind Advisory | FSD | 23 hr |
| Oct 6, 2:48 AM CDT | Freeze Warning | FSD | 30 hr |
| Oct 9, 3:04 PM CDT | Frost Advisory | FSD | 18 hr |
| Oct 11, 3:38 PM CDT | Wind Advisory | FSD | 47 hr |
| Oct 17, 8:25 PM CDT | Wind Advisory | FSD | 20 hr |
| Oct 30, 2:37 PM CDT | Wind Advisory | FSD | 19 hr |
| Nov 13, 2:28 PM CST | Red Flag Warning | FSD | 4 hr |
| Nov 25, 1:22 PM CST | Wind Advisory | FSD | 24 hr |
| Dec 3, 7:06 PM CST | Dense Fog Advisory | FSD | 16 hr |
| Dec 8, 1:57 PM CST | Wind Advisory | FSD | 28 hr |
| Dec 21, 6:21 PM CST | Dense Fog Advisory | FSD | 18 hr |
| Dec 23, 2:51 PM CST | Winter Storm Watch | FSD | 13 hr |
| Dec 24, 3:27 AM CST | Blizzard Warning | FSD | 47 hr |
| Dec 24, 2:22 PM CST | Winter Weather Advisory | FSD | 46 hr |
| Dec 25, 7:00 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 25, 3:31 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 25, 7:56 PM CST | Mesoscale Discussion | SPC | 5 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 | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 29 |
| Flooding | |
| River Flood Warning | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 10 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 11 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 2 |
| 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 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.