Alert archive / South Dakota / Perkins County
Weather alerts in Perkins County, South Dakota, 2016
171 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Perkins County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 171
- Warnings
- 55
- Watches
- 24
- Advisories
- 37
- Busiest month
- July48 alerts
- Busiest day
- July 3, 20167 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Perkins County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 45 | 38 | 16% | 48 | 94% | 21 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 11 | 3 | 73% | 10 | 50% | 4 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 391 | 279 | 29% | 553 | 87% | 24 min |
| NWS Rapid City, SD: flash flood warnings | 6 | 5 | 17% | 7 | 100% | 88 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 16, 3:25 AM MST | Wind Chill Advisory | UNR | 32 hr |
| Jan 19, 6:33 PM MST | Dense Fog Advisory | UNR | 8 hr |
| Feb 5, 2:48 AM MST | High Wind Watch | UNR | 23 hr |
| Feb 5, 1:52 PM MST | High Wind Warning | UNR | 54 hr |
| Feb 12, 3:10 PM MST | Winter Weather Advisory | UNR | 31 hr |
| Feb 17, 2:02 PM MST | High Wind Watch | UNR | 14 hr |
| Feb 17, 2:02 PM MST | High Wind Warning | UNR | 49 hr |
| Feb 23, 7:38 PM MST | Wind Advisory | UNR | 21 hr |
| Feb 27, 4:04 PM MST | Wind Advisory | UNR | 19 hr |
| Mar 15, 2:27 PM MDT | Wind Advisory | UNR | 28 hr |
| Mar 17, 11:01 AM MDT | Wind Advisory | UNR | 4 hr |
| Mar 24, 7:17 PM MDT | Winter Weather Advisory | UNR | 27 hr |
| Mar 30, 2:31 PM MDT | Wind Advisory | UNR | 29 hr |
| Apr 3, 5:39 AM MDT | Wind Advisory | UNR | 12 hr |
| Apr 4, 2:52 AM MDT | High Wind Watch | UNR | 25 hr |
| Apr 5, 3:40 AM MDT | High Wind Warning | UNR | 26 hr |
| Apr 6, 2:59 AM MDT | Wind Advisory | UNR | 16 hr |
| Apr 6, 2:45 PM MDT | Wind Advisory | UNR | 28 hr |
| Apr 13, 6:00 PM MDT | Special Weather Statement | UNR | 45 min |
| Apr 27, 10:19 AM MDT | Winter Weather Advisory | UNR | 16 hr |
| May 10, 3:25 AM MDT | Wind Advisory | UNR | 41 hr |
| May 13, 2:46 AM MDT | Freeze Warning | UNR | 29 hr |
| May 14, 2:40 PM MDT | Frost Advisory | UNR | 12 hr |
| May 21, 10:37 AM MDT | Wind Advisory | UNR | 10 hr |
| May 22, 2:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 28, 6:32 PM MDT | Special Weather Statement | UNR | 28 min |
| May 30, 1:30 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| May 30, 1:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 30, 2:16 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| May 30, 2:25 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| May 30, 3:03 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| May 30, 5:21 PM MDT | Special Weather Statement | UNR | 84 min |
| May 31, 1:52 AM MDT | Wind Advisory | UNR | 17 hr |
| Jun 2, 2:03 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 3:15 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 2, 4:04 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 2, 4:14 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jun 2, 5:01 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 3, 2:55 AM MDT | Wind Advisory | UNR | 15 hr |
| Jun 9, 4:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 6:38 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jun 9, 6:43 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 7:03 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jun 9, 8:04 PM MDT | Special Weather Statement | UNR | 56 min |
| Jun 9, 9:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 9, 10:30 PM MDT | Special Weather Statement | UNR | 60 min |
| Jun 11, 5:15 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 11, 5:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 11, 5:43 PM MDT | Severe Thunderstorm Warning | UNR | 47 min |
| Jun 11, 5:51 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 6:11 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jun 11, 7:11 PM MDT | Special Weather Statement | UNR | 34 min |
| Jun 11, 7:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 10:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 13, 12:45 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 13, 6:00 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 5:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 21, 3:46 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 6:21 PM MDT | Special Weather Statement | UNR | 24 min |
| Jun 21, 7:00 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 23, 11:49 PM MDT | Special Weather Statement | UNR | 41 min |
| Jun 23, 11:55 PM MDT | Severe Thunderstorm Warning | UNR | 32 min |
| Jun 24, 2:31 PM MDT | Wind Advisory | UNR | 27 hr |
| Jun 29, 12:13 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 29, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 29, 4:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 2:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 3:42 PM MDT | Special Weather Statement | UNR | 33 min |
| Jul 3, 4:18 PM MDT | Special Weather Statement | UNR | 27 min |
| Jul 3, 4:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jul 3, 5:00 PM MDT | Special Weather Statement | UNR | 45 min |
| Jul 3, 5:26 PM MDT | Severe Thunderstorm Warning | UNR | 34 min |
| Jul 3, 5:44 PM MDT | Severe Thunderstorm Warning | UNR | 31 min |
| Jul 4, 8:38 PM MDT | Special Weather Statement | UNR | 52 min |
| Jul 6, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 3:34 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 6, 5:47 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jul 6, 6:32 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jul 9, 5:11 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jul 9, 5:54 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jul 9, 5:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 9, 6:09 PM MDT | Special Weather Statement | UNR | 36 min |
| Jul 9, 6:25 PM MDT | Severe Thunderstorm Warning | UNR | 39 min |
| Jul 10, 1:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 6:20 PM MDT | Severe Thunderstorm Warning | UNR | 70 min |
| Jul 10, 6:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 10, 11:46 PM MDT | Severe Thunderstorm Warning | UNR | 44 min |
| Jul 11, 4:32 PM MDT | Wind Advisory | UNR | 4 hr |
| Jul 12, 2:48 AM MDT | Wind Advisory | UNR | 16 hr |
| Jul 14, 6:22 PM MDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jul 14, 6:56 PM MDT | Special Weather Statement | UNR | 49 min |
| Jul 14, 7:14 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| Jul 14, 7:38 PM MDT | Severe Thunderstorm Warning | UNR | 25 min |
| Jul 14, 7:52 PM MDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jul 14, 8:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 16, 2:18 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 16, 2:33 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 16, 6:39 PM MDT | Special Weather Statement | UNR | 21 min |
| Jul 16, 7:29 PM MDT | Severe Thunderstorm Warning | UNR | 41 min |
| Jul 19, 2:07 PM MDT | Heat Advisory | UNR | 29 hr |
| Jul 20, 3:16 PM MDT | Special Weather Statement | UNR | 29 min |
| Jul 20, 3:53 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jul 20, 4:35 PM MDT | Severe Thunderstorm Warning | UNR | 19 min |
| Jul 22, 4:42 AM MDT | Heat Advisory | UNR | 13 hr |
| Jul 22, 1:17 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 3:06 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 22, 4:03 PM MDT | Severe Thunderstorm Warning | UNR | 42 min |
| Jul 22, 4:20 PM MDT | Severe Thunderstorm Warning | UNR | 70 min |
| Jul 22, 4:41 PM MDT | Severe Thunderstorm Warning | UNR | 31 min |
| Jul 22, 5:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 27, 12:37 PM MDT | Special Weather Statement | UNR | 38 min |
| Jul 31, 1:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 2:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 4:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 7:34 PM MDT | Special Weather Statement | UNR | 56 min |
| Jul 31, 7:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 31, 8:02 PM MDT | Severe Thunderstorm Warning | UNR | 47 min |
| Jul 31, 8:44 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Aug 3, 1:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 8, 7:40 PM MDT | Severe Thunderstorm Warning | UNR | 95 min |
| Aug 9, 3:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 9, 4:16 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 6:30 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 8:17 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| Aug 9, 8:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 9, 9:05 PM MDT | Severe Thunderstorm Warning | UNR | 70 min |
| Aug 9, 9:39 PM MDT | Severe Thunderstorm Warning | UNR | 51 min |
| Aug 10, 4:18 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Aug 14, 2:24 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 3:19 PM MDT | Special Weather Statement | UNR | 26 min |
| Aug 14, 3:24 PM MDT | Special Weather Statement | UNR | 21 min |
| Aug 14, 3:29 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Aug 14, 4:28 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Aug 14, 5:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 5:28 PM MDT | Severe Thunderstorm Warning | UNR | 77 min |
| Aug 14, 8:04 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Sep 1, 3:10 AM MDT | Wind Advisory | UNR | 15 hr |
| Sep 5, 4:14 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Sep 23, 1:39 PM MDT | High Wind Watch | UNR | 14 hr |
| Sep 23, 1:39 PM MDT | Wind Advisory | UNR | 50 hr |
| Sep 23, 2:21 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 23, 5:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Sep 23, 8:51 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Sep 23, 8:54 PM MDT | Special Weather Statement | UNR | 51 min |
| Oct 3, 12:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Oct 3, 1:04 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Oct 3, 4:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 5, 3:29 AM MDT | Freeze Warning | UNR | 30 hr |
| Oct 5, 3:29 AM MDT | Wind Advisory | UNR | 15 hr |
| Oct 30, 2:58 AM MDT | High Wind Watch | UNR | 24 hr |
| Oct 31, 2:57 AM MDT | High Wind Warning | UNR | 15 hr |
| Oct 31, 2:57 AM MDT | Wind Advisory | UNR | 15 hr |
| Nov 16, 2:45 PM MST | Winter Weather Advisory | UNR | 41 hr |
| Nov 26, 9:14 PM MST | Winter Storm Watch | UNR | 29 hr |
| Nov 27, 2:30 PM MST | Wind Advisory | UNR | 52 hr |
| Nov 27, 8:50 PM MST | Winter Storm Warning | UNR | 54 hr |
| Nov 28, 2:14 AM MST | Winter Weather Advisory | UNR | 57 hr |
| Dec 5, 3:13 AM MST | Wind Advisory | UNR | 15 hr |
| Dec 5, 5:40 PM MST | Winter Weather Advisory | UNR | 25 hr |
| Dec 6, 2:54 PM MST | Wind Chill Advisory | UNR | 21 hr |
| Dec 7, 2:41 PM MST | Wind Chill Advisory | UNR | 20 hr |
| Dec 9, 2:28 AM MST | Wind Chill Advisory | UNR | 6 hr |
| Dec 13, 2:02 PM MST | Winter Storm Watch | UNR | 47 hr |
| Dec 15, 2:49 AM MST | Winter Storm Warning | UNR | 47 hr |
| Dec 17, 1:42 AM MST | Wind Chill Warning | UNR | 33 hr |
| Dec 20, 2:38 PM MST | Wind Advisory | UNR | 23 hr |
| Dec 21, 1:54 PM MST | Blizzard Watch | UNR | 62 hr |
| Dec 23, 1:57 PM MST | Blizzard Warning | UNR | 3 days |
| Dec 25, 11:56 AM MST | Mesoscale Discussion | SPC | 5 hr |
| Dec 25, 5:33 PM MST | Mesoscale Discussion | SPC | 6 hr |
| Dec 28, 3:15 AM MST | Winter Weather Advisory | UNR | 21 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 | 45 |
| Severe Thunderstorm Watch | 16 |
| Mesoscale Discussion | 34 |
| Special Weather Statement | 21 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 5 |
| Wind Advisory | 22 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.