Alert archive / South Dakota / Corson County
Weather alerts in Corson County, South Dakota, 2016
145 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Corson County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 145
- Warnings
- 53
- Watches
- 22
- Advisories
- 25
- Busiest month
- July51 alerts
- Busiest day
- July 11, 201613 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Corson County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 42 | 27 | 36% | 28 | 68% | 27 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 16 | 4 | 75% | 14 | 36% | 8 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 291 | 186 | 36% | 362 | 83% | 22 min |
| NWS Aberdeen, SD: flash flood warnings | 7 | 3 | 57% | 7 | 57% | 36 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, 1:55 AM MST | Wind Chill Advisory | ABR | 48 hr |
| Jan 19, 6:41 PM MST | Dense Fog Advisory | ABR | 14 hr |
| Feb 5, 2:56 AM MST | High Wind Watch | ABR | 24 hr |
| Feb 6, 2:36 AM MST | High Wind Warning | ABR | 44 hr |
| Feb 12, 2:14 PM MST | Winter Weather Advisory | ABR | 42 hr |
| Feb 18, 2:38 AM MST | High Wind Watch | ABR | 10 hr |
| Feb 18, 1:02 PM MST | High Wind Warning | ABR | 25 hr |
| Mar 4, 4:34 AM MST | Freezing Rain Advisory | ABR | 4 hr |
| Mar 16, 2:30 AM MDT | Wind Advisory | ABR | 15 hr |
| Mar 30, 1:28 PM MDT | Wind Advisory | ABR | 29 hr |
| Apr 5, 2:15 AM MDT | Wind Advisory | ABR | 31 hr |
| Apr 6, 2:19 PM MDT | Wind Advisory | ABR | 28 hr |
| Apr 9, 1:42 AM MDT | Wind Advisory | ABR | 15 hr |
| Apr 24, 5:04 PM MDT | Special Weather Statement | ABR | 41 min |
| May 13, 2:04 AM MDT | Freeze Warning | ABR | 30 hr |
| May 14, 10:33 AM MDT | Frost Advisory | ABR | 21 hr |
| May 22, 2:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 22, 4:21 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 22, 5:05 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| May 22, 8:06 PM MDT | Mesoscale Discussion | SPC | 114 min |
| May 25, 4:16 PM MDT | Severe Thunderstorm Warning | ABR | 29 min |
| May 30, 1:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 30, 1:55 PM MDT | Severe Thunderstorm Warning | ABR | 50 min |
| May 30, 2:35 PM MDT | Severe Thunderstorm Warning | ABR | 25 min |
| May 30, 2:48 PM MDT | Severe Thunderstorm Warning | ABR | 57 min |
| May 30, 4:26 PM MDT | Severe Thunderstorm Warning | ABR | 36 min |
| Jun 2, 2:03 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 4:04 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 9:51 PM MDT | Special Weather Statement | ABR | 39 min |
| Jun 11, 5:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 11, 5:51 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 7:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 12, 3:13 AM MDT | Special Weather Statement | ABR | 47 min |
| Jun 12, 4:16 AM MDT | Severe Thunderstorm Warning | ABR | 8 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, 7:35 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 9:24 PM MDT | Severe Thunderstorm Warning | ABR | 34 min |
| Jun 29, 12:13 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 29, 2:55 PM MDT | Special Weather Statement | ABR | 50 min |
| Jul 3, 2:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 5:36 PM MDT | Severe Thunderstorm Warning | ABR | 39 min |
| Jul 6, 6:38 PM MDT | Severe Thunderstorm Warning | ABR | 37 min |
| Jul 6, 7:19 PM MDT | Special Weather Statement | ABR | 41 min |
| Jul 9, 2:04 PM MDT | Heat Advisory | ABR | 28 hr |
| Jul 9, 5:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 9, 6:45 PM MDT | Special Weather Statement | ABR | 60 min |
| Jul 9, 6:54 PM MDT | Severe Thunderstorm Warning | ABR | 28 min |
| Jul 9, 7:32 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 9, 7:47 PM MDT | Special Weather Statement | ABR | 43 min |
| Jul 9, 8:15 PM MDT | Severe Thunderstorm Warning | ABR | 60 min |
| Jul 10, 6:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 10, 6:36 PM MDT | Severe Thunderstorm Warning | ABR | 54 min |
| Jul 10, 7:31 PM MDT | Severe Thunderstorm Warning | ABR | 37 min |
| Jul 10, 8:35 PM MDT | Special Weather Statement | ABR | 55 min |
| Jul 10, 8:42 PM MDT | Severe Thunderstorm Warning | ABR | 48 min |
| Jul 10, 9:38 PM MDT | Severe Thunderstorm Warning | ABR | 67 min |
| Jul 10, 9:40 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 12:32 AM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 11, 2:32 PM MDT | Special Weather Statement | ABR | 43 min |
| Jul 11, 3:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 11, 3:17 PM MDT | Special Weather Statement | ABR | 43 min |
| Jul 11, 3:58 PM MDT | Special Weather Statement | ABR | 47 min |
| Jul 11, 4:25 PM MDT | Severe Thunderstorm Warning | ABR | 50 min |
| Jul 16, 11:27 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 12:09 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 2:18 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 16, 3:11 PM MDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 16, 4:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 16, 5:57 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 7:25 PM MDT | Severe Thunderstorm Warning | ABR | 50 min |
| Jul 16, 7:50 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 16, 8:50 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 18, 2:45 AM MDT | Excessive Heat Watch | ABR | 24 hr |
| Jul 19, 2:35 AM MDT | Excessive Heat Warning | ABR | 4 days |
| 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, 3:48 PM MDT | Severe Thunderstorm Warning | ABR | 42 min |
| Jul 22, 4:20 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 22, 4:28 PM MDT | Severe Thunderstorm Warning | ABR | 62 min |
| Jul 22, 4:33 PM MDT | Severe Thunderstorm Warning | ABR | 57 min |
| Jul 22, 4:52 PM MDT | Severe Thunderstorm Warning | ABR | 68 min |
| Jul 22, 5:28 PM MDT | Severe Thunderstorm Warning | ABR | 47 min |
| Jul 22, 5:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 22, 5:59 PM MDT | Flash Flood Warning | ABR | 6 hr |
| Jul 22, 6:13 PM MDT | Severe Thunderstorm Warning | ABR | 47 min |
| Jul 23, 4:00 AM MDT | Severe Thunderstorm Warning | ABR | 23 min |
| Jul 26, 7:09 PM MDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 30, 5:46 PM MDT | Severe Thunderstorm Warning | ABR | 59 min |
| Jul 31, 1:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 4:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 7:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 31, 8:55 PM MDT | Special Weather Statement | ABR | 65 min |
| Jul 31, 10:01 PM MDT | Special Weather Statement | ABR | 59 min |
| Aug 1, 2:19 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 1, 5:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 1:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 3, 2:39 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| 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, 8:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 9, 9:09 PM MDT | Severe Thunderstorm Warning | ABR | 51 min |
| Aug 9, 9:45 PM MDT | Severe Thunderstorm Warning | ABR | 60 min |
| Aug 9, 10:43 PM MDT | Severe Thunderstorm Warning | ABR | 47 min |
| Aug 9, 11:00 PM MDT | Severe Thunderstorm Warning | ABR | 45 min |
| Aug 9, 11:17 PM MDT | Severe Thunderstorm Warning | ABR | 43 min |
| Aug 10, 12:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 10, 6:03 PM MDT | Severe Thunderstorm Warning | ABR | 42 min |
| Aug 10, 6:26 PM MDT | Severe Thunderstorm Warning | ABR | 34 min |
| Aug 10, 6:41 PM MDT | Severe Thunderstorm Warning | ABR | 26 min |
| Aug 10, 7:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 4:05 PM MDT | Special Weather Statement | ABR | 40 min |
| Aug 14, 4:22 PM MDT | Severe Thunderstorm Warning | ABR | 38 min |
| Aug 14, 5:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 8:04 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 15, 6:14 PM MDT | Special Weather Statement | ABR | 61 min |
| Aug 15, 6:55 PM MDT | Severe Thunderstorm Warning | ABR | 65 min |
| Aug 15, 7:50 PM MDT | Severe Thunderstorm Warning | ABR | 55 min |
| Sep 1, 8:10 PM MDT | Wind Advisory | ABR | 22 hr |
| Sep 24, 1:58 PM MDT | Wind Advisory | ABR | 28 hr |
| Oct 3, 2:19 AM MDT | Wind Advisory | ABR | 16 hr |
| Oct 3, 4:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 3, 5:06 PM MDT | Special Weather Statement | ABR | 54 min |
| Oct 3, 6:53 PM MDT | Special Weather Statement | ABR | 67 min |
| Oct 5, 1:37 AM MDT | Wind Advisory | ABR | 16 hr |
| Oct 5, 2:16 PM MDT | Frost Advisory | ABR | 19 hr |
| Oct 5, 7:10 PM MDT | Freeze Warning | ABR | 14 hr |
| Oct 6, 2:06 PM MDT | Freeze Warning | ABR | 19 hr |
| Oct 30, 1:55 PM MDT | Wind Advisory | ABR | 28 hr |
| Nov 16, 2:39 AM MST | Winter Storm Watch | ABR | 24 hr |
| Nov 17, 2:53 AM MST | Winter Weather Advisory | ABR | 32 hr |
| Nov 28, 2:38 AM MST | Winter Weather Advisory | ABR | 56 hr |
| Dec 5, 3:08 AM MST | Winter Weather Advisory | ABR | 50 hr |
| Dec 5, 2:48 PM MST | Blizzard Warning | ABR | 3 hr |
| Dec 7, 1:23 PM MST | Wind Chill Advisory | ABR | 22 hr |
| Dec 12, 2:50 PM MST | Wind Chill Advisory | ABR | 18 hr |
| Dec 14, 1:43 AM MST | Wind Chill Advisory | ABR | 30 hr |
| Dec 15, 1:49 PM MST | Winter Weather Advisory | ABR | 42 hr |
| Dec 16, 2:37 AM MST | Wind Chill Warning | ABR | 56 hr |
| Dec 20, 2:22 PM MST | Wind Advisory | ABR | 26 hr |
| Dec 22, 3:53 AM MST | Blizzard Watch | ABR | 34 hr |
| Dec 23, 2:06 PM MST | Blizzard Warning | ABR | 72 hr |
| Dec 25, 11:56 AM MST | Mesoscale Discussion | SPC | 5 hr |
| Dec 25, 5:33 PM MST | Mesoscale Discussion | SPC | 6 hr |
| Dec 26, 11:05 AM MST | Blizzard Warning | ABR | 3 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 | 42 |
| Severe Thunderstorm Watch | 17 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 17 |
| Flooding | |
| Flash Flood Warning | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 11 |
| 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.