Alert archive / South Dakota / McCook County
Weather alerts in McCook County, South Dakota, 2019
149 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
McCook County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 149
- Warnings
- 48
- Watches
- 20
- Advisories
- 50
- Busiest month
- July35 alerts
- Busiest day
- September 11, 201914 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 3 tornado warnings covering McCook County in 2019 had a tornado report inside them.
McCook County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 18 | 5% | 8 | 100% | 18 min |
| Flash flood warnings | 4 | 3 | 25% | 1 | 100% | 53 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 37 | 10 | 73% | 26 | 50% | 7 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 172 | 107 | 38% | 251 | 88% | 18 min |
| NWS Sioux Falls, SD: flash flood warnings | 32 | 19 | 41% | 26 | 81% | 73 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 7, 2:44 PM CST | Wind Advisory | FSD | 30 hr |
| Jan 16, 3:00 PM CST | Winter Weather Advisory | FSD | 57 hr |
| Jan 17, 2:29 PM CST | Winter Storm Warning | FSD | 34 hr |
| Jan 18, 11:07 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Jan 18, 2:50 PM CST | Wind Chill Advisory | FSD | 19 hr |
| Jan 21, 3:26 AM CST | Winter Weather Advisory | FSD | 35 hr |
| Jan 23, 2:27 PM CST | Wind Chill Advisory | FSD | 43 hr |
| Jan 23, 2:27 PM CST | Winter Weather Advisory | FSD | 20 hr |
| Jan 26, 2:29 PM CST | Winter Weather Advisory | FSD | 46 hr |
| Jan 27, 3:34 AM CST | Wind Chill Watch | FSD | 24 hr |
| Jan 27, 3:48 AM CST | High Wind Warning | FSD | 26 hr |
| Jan 27, 3:48 AM CST | Wind Advisory | FSD | 32 hr |
| Jan 28, 3:34 AM CST | Wind Chill Warning | FSD | 3 days |
| Jan 28, 3:34 AM CST | Wind Chill Advisory | FSD | 35 hr |
| Jan 28, 3:34 AM CST | Wind Chill Advisory | FSD | 3 days |
| Feb 4, 3:22 AM CST | Wind Chill Advisory | FSD | 27 hr |
| Feb 5, 3:25 PM CST | Winter Weather Advisory | FSD | 57 hr |
| Feb 7, 3:19 AM CST | Wind Chill Advisory | FSD | 54 hr |
| Feb 12, 10:36 AM CST | Winter Weather Advisory | FSD | 10 hr |
| Feb 14, 3:40 AM CST | Wind Chill Advisory | FSD | 29 hr |
| Feb 15, 2:55 PM CST | Winter Weather Advisory | FSD | 51 hr |
| Feb 19, 4:07 AM CST | Winter Weather Advisory | FSD | 35 hr |
| Feb 21, 3:52 AM CST | Winter Weather Advisory | FSD | 3 days |
| Feb 24, 2:53 PM CST | Wind Chill Advisory | FSD | 17 hr |
| Mar 2, 3:59 AM CST | Wind Chill Advisory | FSD | 56 hr |
| Mar 7, 3:38 AM CST | Winter Storm Watch | FSD | 36 hr |
| Mar 8, 3:16 PM CST | Winter Weather Advisory | FSD | 38 hr |
| Mar 9, 5:05 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 11, 3:03 PM CDT | Winter Storm Watch | FSD | 49 hr |
| Mar 11, 3:13 PM CDT | Flood Watch | FSD | 72 hr |
| Mar 12, 5:41 PM CDT | Dense Fog Advisory | FSD | 19 hr |
| Mar 13, 12:55 PM CDT | Areal Flood Warning | FSD | 12 hr |
| Mar 13, 4:03 PM CDT | Winter Weather Advisory | FSD | 27 hr |
| Mar 13, 4:06 PM CDT | Wind Advisory | FSD | 36 hr |
| Mar 14, 2:18 AM CDT | Areal Flood Warning | FSD | 18 hr |
| Mar 14, 8:51 AM CDT | Blizzard Warning | FSD | 6 hr |
| Mar 14, 8:54 PM CDT | Areal Flood Warning | FSD | 12 hr |
| Apr 4, 10:24 PM CDT | Dense Fog Advisory | FSD | 12 hr |
| Apr 8, 3:46 AM CDT | Winter Storm Watch | FSD | 57 hr |
| Apr 9, 3:52 AM CDT | Blizzard Warning | FSD | 3 days |
| Apr 11, 2:34 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 11, 8:28 PM CDT | Winter Weather Advisory | FSD | 17 hr |
| Apr 26, 2:44 PM CDT | Winter Weather Advisory | FSD | 22 hr |
| Apr 27, 5:14 AM CDT | Mesoscale Discussion | SPC | 6 hr |
| May 4, 3:44 AM CDT | Dense Fog Advisory | FSD | 5 hr |
| May 9, 3:38 AM CDT | Frost Advisory | FSD | 28 hr |
| May 20, 2:58 PM CDT | Wind Advisory | FSD | 32 hr |
| May 31, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 3:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 27, 3:34 AM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Jun 27, 3:57 AM CDT | Severe Thunderstorm Warning | FSD | 48 min |
| Jun 27, 4:01 AM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 27, 4:36 AM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| Jun 27, 3:15 PM CDT | Heat Advisory | FSD | 29 hr |
| Jun 28, 2:02 PM CDT | Heat Advisory | FSD | 31 hr |
| Jun 29, 11:59 AM CDT | Excessive Heat Warning | FSD | 9 hr |
| Jun 29, 3:18 PM CDT | Heat Advisory | FSD | 30 hr |
| Jun 30, 4:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 30, 9:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 1, 1:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 1, 3:14 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 4:16 PM CDT | Flash Flood Watch | FSD | 9 hr |
| Jul 1, 5:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 10:48 AM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jul 3, 10:56 AM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Jul 3, 11:41 AM CDT | Severe Thunderstorm Warning | FSD | 23 min |
| Jul 3, 5:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 10:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 12, 10:43 AM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Jul 13, 2:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 7:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 14, 2:56 AM CDT | Heat Advisory | FSD | 18 hr |
| Jul 14, 3:33 PM CDT | Heat Advisory | FSD | 29 hr |
| Jul 15, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 16, 11:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 17, 4:07 AM CDT | Excessive Heat Warning | FSD | 66 hr |
| Jul 17, 4:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 17, 5:27 AM CDT | Severe Thunderstorm Warning | FSD | 63 min |
| Jul 17, 6:17 AM CDT | Severe Thunderstorm Warning | FSD | 58 min |
| Jul 17, 9:09 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 17, 5:19 PM CDT | Heat Advisory | FSD | 28 hr |
| Jul 18, 4:09 PM CDT | Heat Advisory | FSD | 28 hr |
| Jul 18, 4:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 20, 5:02 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 20, 5:51 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 20, 7:08 AM CDT | Severe Thunderstorm Warning | FSD | 37 min |
| Jul 20, 7:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 20, 7:41 AM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Jul 20, 7:48 AM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Jul 28, 7:27 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 28, 7:47 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 28, 8:05 PM CDT | Severe Thunderstorm Warning | FSD | 40 min |
| Jul 28, 8:21 PM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| Aug 9, 12:22 PM CDT | Flood Watch | FSD | 12 hr |
| Aug 9, 6:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 2:21 AM CDT | Dense Fog Advisory | FSD | 7 hr |
| Aug 15, 1:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 15, 3:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 15, 5:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 5:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 6:14 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 17, 8:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 17, 8:40 PM CDT | Severe Thunderstorm Warning | FSD | 50 min |
| Aug 17, 9:18 PM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Aug 19, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 10, 3:22 PM CDT | Flash Flood Watch | FSD | 16 hr |
| Sep 10, 8:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 10, 8:33 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 10, 9:56 PM CDT | Tornado Warning | FSD | 34 min |
| Sep 10, 10:22 PM CDT | Flash Flood Warning | FSD | 5 hr |
| Sep 10, 10:22 PM CDT | Severe Thunderstorm Warning | FSD | 53 min |
| Sep 10, 10:42 PM CDT | Tornado Warning | FSD | 33 min |
| Sep 10, 10:47 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Sep 10, 10:53 PM CDT | Tornado Warning | FSD | 24 min |
| Sep 10, 11:26 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Sep 10, 11:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Sep 11, 2:17 AM CDT | Flash Flood Warning | FSD | 4 hr |
| Sep 11, 3:31 AM CDT | Areal Flood Warning | FSD | 18 hr |
| Sep 11, 4:07 AM CDT | Flash Flood Watch | FSD | 26 hr |
| Sep 11, 5:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 8:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 11, 10:47 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Sep 11, 11:05 PM CDT | Areal Flood Warning | FSD | 12 hr |
| Sep 12, 1:50 AM CDT | Areal Flood Warning | FSD | 12 hr |
| Sep 12, 10:38 AM CDT | Areal Flood Warning | FSD | 24 hr |
| Sep 12, 1:24 PM CDT | Areal Flood Warning | FSD | 24 hr |
| Sep 13, 10:29 AM CDT | Areal Flood Warning | FSD | 24 hr |
| Sep 13, 1:13 PM CDT | Areal Flood Warning | FSD | 24 hr |
| Sep 14, 10:25 AM CDT | Areal Flood Warning | FSD | 48 hr |
| Sep 14, 1:13 PM CDT | Areal Flood Warning | FSD | 48 hr |
| Sep 15, 3:19 AM CDT | Dense Fog Advisory | FSD | 9 hr |
| Sep 21, 1:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Oct 3, 3:19 PM CDT | Frost Advisory | FSD | 18 hr |
| Oct 4, 3:31 PM CDT | Wind Advisory | FSD | 27 hr |
| Oct 12, 9:55 AM CDT | Wind Advisory | FSD | 9 hr |
| Oct 20, 9:20 PM CDT | Wind Advisory | FSD | 43 hr |
| Oct 21, 4:03 AM CDT | High Wind Warning | FSD | 24 hr |
| Oct 21, 11:40 AM CDT | Wind Advisory | FSD | 28 hr |
| Nov 5, 1:03 PM CST | Winter Weather Advisory | FSD | 17 hr |
| Nov 24, 2:01 PM CST | Winter Storm Watch | FSD | 25 hr |
| Nov 25, 4:05 AM CST | Winter Storm Warning | FSD | 56 hr |
| Nov 26, 5:23 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 27, 5:56 PM CST | Winter Weather Advisory | FSD | 4 days |
| Dec 8, 12:21 PM CST | Dense Fog Advisory | FSD | 15 hr |
| Dec 13, 9:07 AM CST | Dense Fog Advisory | FSD | 7 hr |
| Dec 24, 2:24 PM CST | Dense Fog Advisory | FSD | 34 hr |
| Dec 26, 3:10 PM CST | Winter Storm Watch | FSD | 24 hr |
| Dec 27, 3:18 PM CST | Winter Storm Warning | FSD | 63 hr |
| Dec 27, 3:18 PM CST | Winter Weather Advisory | FSD | 3 days |
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 | 19 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 9 |
| Mesoscale Discussion | 31 |
| Flooding | |
| Areal Flood Warning | 12 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 16 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 7 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 9 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 8 |
| 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 archive20182020
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.