Alert archive / South Dakota / Corson County
Weather alerts in Corson County, South Dakota, 2012
119 weather alerts in 2012, 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 2012. Tap one for its archive.
- Alerts
- 119
- Warnings
- 38
- Watches
- 15
- Advisories
- 44
- Busiest month
- June23 alerts
- Busiest day
- July 22, 20126 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, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 28 | 17 | 39% | 19 | 68% | 21 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 25 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 13 | 5 | 62% | 9 | 56% | 16 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 189 | 124 | 34% | 274 | 84% | 22 min |
| NWS Aberdeen, SD: flash flood warnings | 5 | 4 | 20% | 8 | 100% | 60 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 3, 1:48 AM MST | Wind Advisory | ABR | 15 hr |
| Jan 10, 1:20 PM MST | Wind Advisory | ABR | 28 hr |
| Jan 18, 2:18 AM MST | Extreme Cold Warning | ABR | 33 hr |
| Jan 20, 2:24 PM MST | Winter Storm Watch | ABR | 12 hr |
| Jan 21, 2:21 AM MST | Winter Weather Advisory | ABR | 45 hr |
| Feb 2, 4:45 PM MST | Dense Fog Advisory | ABR | 42 hr |
| Feb 22, 2:52 PM MST | Winter Weather Advisory | ABR | 6 hr |
| Feb 22, 8:53 PM MST | Winter Storm Warning | ABR | 17 hr |
| Feb 25, 1:24 PM MST | Winter Weather Advisory | ABR | 25 hr |
| Feb 26, 2:21 AM MST | Winter Storm Watch | ABR | 12 hr |
| Feb 26, 2:20 PM MST | Blizzard Watch | ABR | 23 hr |
| Feb 27, 1:19 PM MST | Blizzard Warning | ABR | 47 hr |
| Feb 28, 1:43 PM MST | Mesoscale Discussion | SPC | 5 hr |
| Mar 2, 2:40 AM MST | Wind Advisory | ABR | 17 hr |
| Mar 3, 2:18 PM MST | Wind Advisory | ABR | 24 hr |
| Mar 12, 11:58 AM MDT | Wind Advisory | ABR | 6 hr |
| Mar 19, 2:39 AM MDT | Wind Advisory | ABR | 12 hr |
| Mar 23, 12:19 AM MDT | Dense Fog Advisory | ABR | 10 hr |
| Mar 25, 2:19 PM MDT | High Wind Watch | ABR | 20 hr |
| Mar 26, 2:20 AM MDT | Wind Advisory | ABR | 16 hr |
| Mar 26, 10:45 AM MDT | High Wind Warning | ABR | 28 hr |
| Mar 26, 5:28 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 26, 6:14 PM MDT | Wind Advisory | ABR | 24 hr |
| Mar 26, 7:37 PM MDT | Severe Thunderstorm Warning | ABR | 38 min |
| Mar 26, 8:14 PM MDT | Severe Thunderstorm Warning | ABR | 46 min |
| Mar 26, 8:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Apr 1, 9:57 PM MDT | Wind Advisory | ABR | 21 hr |
| Apr 5, 2:10 PM MDT | Wind Advisory | ABR | 29 hr |
| Apr 7, 2:32 AM MDT | Wind Advisory | ABR | 16 hr |
| Apr 14, 2:28 PM MDT | Wind Advisory | ABR | 31 hr |
| Apr 21, 2:26 AM MDT | Wind Advisory | ABR | 16 hr |
| Apr 24, 4:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Apr 27, 2:59 AM MDT | Wind Advisory | ABR | 6 hr |
| May 2, 6:20 PM MDT | Mesoscale Discussion | SPC | 55 min |
| May 7, 8:52 AM MDT | Wind Advisory | ABR | 8 hr |
| May 10, 3:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| May 10, 4:06 PM MDT | Wind Advisory | ABR | 10 hr |
| May 11, 1:49 PM MDT | Frost Advisory | ABR | 16 hr |
| May 16, 10:14 AM MDT | Wind Advisory | ABR | 7 hr |
| May 22, 1:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| May 26, 11:28 PM MDT | Severe Thunderstorm Warning | ABR | 29 min |
| May 28, 3:57 AM MDT | Wind Advisory | ABR | 15 hr |
| May 30, 1:08 PM MDT | Frost Advisory | ABR | 17 hr |
| Jun 5, 5:48 AM MDT | Wind Advisory | ABR | 12 hr |
| Jun 6, 2:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 5:45 PM MDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jun 7, 6:25 PM MDT | Severe Thunderstorm Warning | ABR | 36 min |
| Jun 7, 6:50 PM MDT | Severe Thunderstorm Warning | ABR | 21 min |
| Jun 7, 8:05 PM MDT | Flash Flood Warning | ABR | 2 hr |
| Jun 11, 1:49 AM MDT | Wind Advisory | ABR | 13 hr |
| Jun 13, 1:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 13, 2:26 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 8:34 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 13, 8:39 PM MDT | Severe Thunderstorm Warning | ABR | 51 min |
| Jun 13, 9:08 PM MDT | Severe Thunderstorm Warning | ABR | 29 min |
| Jun 13, 9:53 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 4:14 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 2:29 PM MDT | Heat Advisory | ABR | 29 hr |
| Jun 25, 7:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 26, 2:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 29, 7:13 AM MDT | Severe Thunderstorm Warning | ABR | 34 min |
| Jun 30, 2:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 30, 2:57 PM MDT | Severe Thunderstorm Warning | ABR | 48 min |
| Jun 30, 3:02 PM MDT | Severe Thunderstorm Warning | ABR | 43 min |
| Jun 30, 3:33 PM MDT | Severe Thunderstorm Warning | ABR | 42 min |
| Jun 30, 3:57 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 30, 6:19 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 1, 1:44 PM MDT | Heat Advisory | ABR | 3 days |
| Jul 14, 2:00 PM MDT | Heat Advisory | ABR | 53 hr |
| Jul 16, 2:07 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 16, 2:53 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 5:53 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 16, 6:24 PM MDT | Severe Thunderstorm Warning | ABR | 66 min |
| Jul 16, 8:40 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jul 16, 8:56 PM MDT | Severe Thunderstorm Warning | ABR | 64 min |
| Jul 18, 2:39 PM MDT | Heat Advisory | ABR | 54 hr |
| Jul 21, 8:27 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 22, 2:35 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jul 22, 3:28 PM MDT | Severe Thunderstorm Warning | ABR | 32 min |
| Jul 22, 3:55 PM MDT | Severe Thunderstorm Warning | ABR | 50 min |
| Jul 22, 4:45 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 22, 5:25 PM MDT | Severe Thunderstorm Warning | ABR | 50 min |
| Jul 22, 6:39 PM MDT | Severe Thunderstorm Warning | ABR | 38 min |
| Jul 22, 7:13 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 24, 4:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jul 24, 7:01 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 2:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 29, 3:58 PM MDT | Severe Thunderstorm Warning | ABR | 31 min |
| Aug 3, 1:01 PM MDT | Severe Thunderstorm Warning | ABR | 44 min |
| Aug 3, 1:41 PM MDT | Severe Thunderstorm Warning | ABR | 64 min |
| Aug 3, 2:05 PM MDT | Severe Thunderstorm Warning | ABR | 55 min |
| Aug 24, 5:20 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Aug 24, 5:57 PM MDT | Severe Thunderstorm Warning | ABR | 31 min |
| Aug 24, 6:00 PM MDT | Severe Thunderstorm Warning | ABR | 29 min |
| Aug 24, 6:49 PM MDT | Severe Thunderstorm Warning | ABR | 18 min |
| Aug 24, 6:50 PM MDT | Severe Thunderstorm Warning | ABR | 40 min |
| Aug 29, 1:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Sep 12, 2:00 PM MDT | Frost Advisory | ABR | 17 hr |
| Sep 19, 2:15 AM MDT | Wind Advisory | ABR | 17 hr |
| Sep 21, 2:40 AM MDT | Freeze Watch | ABR | 12 hr |
| Sep 21, 2:10 PM MDT | Freeze Warning | ABR | 18 hr |
| Sep 22, 2:04 AM MDT | Freeze Warning | ABR | 30 hr |
| Oct 2, 2:27 PM MDT | Wind Advisory | ABR | 52 hr |
| Oct 12, 10:29 AM MDT | Wind Advisory | ABR | 8 hr |
| Oct 15, 9:28 AM MDT | High Wind Watch | ABR | 26 hr |
| Oct 16, 11:04 AM MDT | High Wind Warning | ABR | 58 hr |
| Oct 16, 11:04 AM MDT | Wind Advisory | ABR | 66 hr |
| Nov 9, 9:22 AM MST | Winter Weather Advisory | ABR | 5 hr |
| Nov 9, 6:00 PM MST | Winter Weather Advisory | ABR | 5 hr |
| Nov 10, 3:05 AM MST | Winter Weather Advisory | ABR | 24 hr |
| Nov 10, 11:11 AM MST | Mesoscale Discussion | SPC | 4 hr |
| Nov 18, 6:14 AM MST | Dense Fog Advisory | ABR | 4 hr |
| Nov 21, 3:05 AM MST | Wind Advisory | ABR | 41 hr |
| Nov 30, 4:08 AM MST | Dense Fog Advisory | ABR | 4 hr |
| Dec 7, 3:08 AM MST | Winter Storm Watch | ABR | 24 hr |
| Dec 8, 3:02 AM MST | Blizzard Warning | ABR | 38 hr |
| Dec 8, 3:02 AM MST | Winter Weather Advisory | ABR | 38 hr |
| Dec 9, 2:40 AM MST | Blizzard Warning | ABR | 8 hr |
| Dec 13, 6:48 PM MST | Dense Fog Advisory | ABR | 13 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 | 28 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 22 |
| Flooding | |
| Flash Flood Warning | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 1 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 25 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.