Alert archive / South Dakota / Potter County
Weather alerts in Potter County, South Dakota, 2021
105 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Potter County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 105
- Warnings
- 34
- Watches
- 17
- Advisories
- 35
- Busiest month
- August23 alerts
- Busiest day
- August 24, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Potter County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 10 | 33% | 4 | 50% | 27 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 21 | 5 | 76% | 17 | 35% | 19 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 170 | 101 | 41% | 220 | 76% | 20 min |
| NWS Aberdeen, SD: flash flood warnings | 4 | 1 | 75% | 1 | 100% | 104 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 6, 8:46 PM CST | Dense Fog Advisory | ABR | 13 hr |
| Jan 8, 9:43 PM CST | Dense Fog Advisory | ABR | 14 hr |
| Jan 12, 11:23 AM CST | High Wind Watch | ABR | 27 hr |
| Jan 13, 2:37 PM CST | High Wind Warning | ABR | 45 hr |
| Jan 29, 2:39 PM CST | Winter Weather Advisory | ABR | 30 hr |
| Jan 29, 9:33 PM CST | Dense Fog Advisory | ABR | 13 hr |
| Jan 31, 8:55 PM CST | Dense Fog Advisory | ABR | 68 hr |
| Feb 5, 2:59 AM CST | Wind Chill Advisory | ABR | 57 hr |
| Feb 8, 2:40 AM CST | Wind Chill Advisory | ABR | 32 hr |
| Feb 9, 2:41 PM CST | Wind Chill Advisory | ABR | 20 hr |
| Feb 10, 1:29 PM CST | Wind Chill Advisory | ABR | 3 days |
| Feb 12, 2:27 PM CST | Wind Chill Warning | ABR | 69 hr |
| Feb 15, 11:30 AM CST | Wind Chill Warning | ABR | 22 hr |
| Feb 21, 1:25 PM CST | Wind Advisory | ABR | 29 hr |
| Feb 23, 3:22 AM CST | Wind Advisory | ABR | 14 hr |
| Mar 5, 2:30 AM CST | Dense Fog Advisory | ABR | 10 hr |
| Mar 6, 2:07 AM CST | Dense Fog Advisory | ABR | 8 hr |
| Mar 9, 4:07 AM CST | Winter Weather Advisory | ABR | 44 hr |
| Mar 14, 6:20 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 26, 2:41 PM CDT | Fire Weather Watch | ABR | 48 hr |
| Mar 28, 3:53 AM CDT | Red Flag Warning | ABR | 16 hr |
| Mar 28, 2:31 PM CDT | High Wind Warning | ABR | 28 hr |
| Mar 28, 2:31 PM CDT | Wind Advisory | ABR | 32 hr |
| Mar 28, 2:36 PM CDT | Red Flag Warning | ABR | 31 hr |
| Mar 29, 9:04 PM CDT | High Wind Warning | ABR | 10 hr |
| Mar 29, 9:04 PM CDT | Wind Advisory | ABR | 21 hr |
| Mar 30, 6:11 PM CDT | Wind Advisory | ABR | 3 hr |
| Mar 31, 3:02 AM CDT | Fire Weather Watch | ABR | 12 hr |
| Mar 31, 2:48 PM CDT | Red Flag Warning | ABR | 31 hr |
| Apr 3, 3:15 AM CDT | Red Flag Warning | ABR | 17 hr |
| Apr 5, 3:32 AM CDT | Red Flag Warning | ABR | 16 hr |
| Apr 8, 3:17 PM CDT | Wind Advisory | ABR | 27 hr |
| Apr 10, 2:43 PM CDT | Wind Advisory | ABR | 52 hr |
| May 1, 2:50 AM CDT | Red Flag Warning | ABR | 17 hr |
| May 5, 2:52 PM CDT | Fire Weather Watch | ABR | 13 hr |
| May 23, 8:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 23, 10:14 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| May 23, 10:46 PM CDT | Severe Thunderstorm Warning | ABR | 44 min |
| May 30, 2:05 AM CDT | Dense Fog Advisory | ABR | 6 hr |
| Jun 7, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 10, 3:53 AM CDT | Heat Advisory | ABR | 16 hr |
| Jun 10, 9:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 12:52 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 11, 2:37 AM CDT | Severe Thunderstorm Warning | ABR | 38 min |
| Jun 11, 2:54 AM CDT | Severe Thunderstorm Warning | ABR | 36 min |
| Jun 11, 3:16 AM CDT | Severe Thunderstorm Warning | ABR | 44 min |
| Jun 13, 1:15 PM CDT | Special Weather Statement | ABR | 30 min |
| Jul 1, 2:17 PM CDT | Fire Weather Watch | ABR | 16 hr |
| Jul 2, 6:06 AM CDT | Red Flag Warning | ABR | 15 hr |
| Jul 3, 2:57 AM CDT | Red Flag Warning | ABR | 15 hr |
| Jul 3, 6:35 PM CDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 8, 8:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 2:41 AM CDT | Mesoscale Discussion | SPC | 34 min |
| Jul 23, 5:04 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 7:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 10:40 PM CDT | Special Weather Statement | ABR | 50 min |
| Jul 23, 10:54 PM CDT | Severe Thunderstorm Warning | ABR | 51 min |
| Jul 25, 3:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 3:41 AM CDT | Heat Advisory | ABR | 15 hr |
| Jul 26, 3:41 AM CDT | Heat Advisory | ABR | 41 hr |
| Jul 27, 3:42 AM CDT | Heat Advisory | ABR | 39 hr |
| Aug 9, 2:43 PM CDT | Fire Weather Watch | ABR | 13 hr |
| Aug 10, 3:28 AM CDT | Red Flag Warning | ABR | 17 hr |
| Aug 14, 7:29 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Aug 14, 8:15 PM CDT | Severe Thunderstorm Warning | ABR | 60 min |
| Aug 16, 2:21 PM CDT | Fire Weather Watch | ABR | 12 hr |
| Aug 17, 2:39 AM CDT | Red Flag Warning | ABR | 17 hr |
| Aug 22, 2:21 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 22, 4:19 PM CDT | Severe Thunderstorm Warning | ABR | 41 min |
| Aug 23, 7:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 9:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 23, 10:11 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 23, 10:17 PM CDT | Severe Thunderstorm Warning | ABR | 43 min |
| Aug 23, 10:56 PM CDT | Severe Thunderstorm Warning | ABR | 64 min |
| Aug 23, 11:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 23, 11:51 PM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| Aug 26, 2:35 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 1:44 AM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Aug 28, 2:32 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 28, 5:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 6:08 AM CDT | Severe Thunderstorm Warning | ABR | 37 min |
| Aug 28, 6:40 AM CDT | Special Weather Statement | ABR | 35 min |
| Aug 30, 4:03 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 1, 5:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 14, 2:26 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Oct 12, 3:55 PM CDT | Wind Advisory | ABR | 30 hr |
| Oct 13, 2:03 PM CDT | Special Weather Statement | ABR | 27 min |
| Oct 15, 11:38 AM CDT | Frost Advisory | ABR | 22 hr |
| Nov 10, 9:49 AM CST | High Wind Watch | ABR | 5 hr |
| Nov 10, 2:45 PM CST | High Wind Warning | ABR | 39 hr |
| Nov 12, 3:02 AM CST | Wind Advisory | ABR | 9 hr |
| Nov 13, 3:26 AM CST | High Wind Warning | ABR | 20 hr |
| Nov 13, 9:57 AM CST | Winter Weather Advisory | ABR | 3 hr |
| Nov 13, 2:14 PM CST | Wind Advisory | ABR | 3 hr |
| Nov 15, 3:40 AM CST | High Wind Watch | ABR | 11 hr |
| Nov 15, 2:47 PM CST | Wind Advisory | ABR | 51 hr |
| Dec 4, 3:11 AM CST | High Wind Watch | ABR | 12 hr |
| Dec 4, 3:01 PM CST | High Wind Warning | ABR | 27 hr |
| Dec 14, 3:37 AM CST | High Wind Watch | ABR | 11 hr |
| Dec 14, 3:54 AM CST | Winter Weather Advisory | ABR | 50 hr |
| Dec 14, 2:20 PM CST | High Wind Warning | ABR | 36 hr |
| Dec 26, 2:12 AM CST | Winter Weather Advisory | ABR | 37 hr |
| Dec 28, 3:04 PM CST | Wind Chill Advisory | ABR | 21 hr |
| Dec 30, 2:36 PM CST | Wind Chill Advisory | ABR | 27 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 | 15 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 4 |
| Winter | |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Wind Chill Warning | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| High Wind Warning | 7 |
| High Wind Watch | 5 |
| Wind Advisory | 11 |
| Fire | |
| Red Flag Warning | 10 |
| Fire Weather Watch | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.