Alert archive / South Dakota / Brule County
Weather alerts in Brule County, South Dakota, 2018
101 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Brule County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 101
- Warnings
- 32
- Watches
- 17
- Advisories
- 27
- Busiest month
- June23 alerts
- Busiest day
- June 27, 201812 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Brule County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 6 | 70% | 6 | 83% | 18 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 112 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 12 | 3 | 75% | 10 | 40% | 9 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 165 | 77 | 53% | 157 | 81% | 19 min |
| NWS Sioux Falls, SD: flash flood warnings | 43 | 31 | 28% | 66 | 82% | 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 1, 12:01 PM CST | Wind Chill Advisory | FSD | 22 hr |
| Jan 9, 3:46 AM CST | Winter Storm Watch | FSD | 35 hr |
| Jan 10, 3:07 AM CST | Winter Weather Advisory | FSD | 38 hr |
| Jan 14, 3:20 AM CST | Wind Chill Advisory | FSD | 56 hr |
| Jan 19, 4:20 AM CST | Winter Storm Watch | FSD | 47 hr |
| Jan 21, 3:41 AM CST | Winter Weather Advisory | FSD | 38 hr |
| Feb 7, 3:41 PM CST | Winter Weather Advisory | FSD | 35 hr |
| Feb 9, 3:07 PM CST | Wind Chill Advisory | FSD | 19 hr |
| Feb 18, 3:39 PM CST | Winter Weather Advisory | FSD | 42 hr |
| Feb 20, 2:06 PM CST | Wind Chill Advisory | FSD | 20 hr |
| Feb 21, 2:59 PM CST | Winter Weather Advisory | FSD | 33 hr |
| Feb 23, 3:00 PM CST | Winter Weather Advisory | FSD | 27 hr |
| Mar 3, 4:20 AM CST | Winter Storm Watch | FSD | 34 hr |
| Mar 4, 4:09 AM CST | Blizzard Warning | FSD | 59 hr |
| Mar 15, 3:48 AM CDT | Winter Storm Watch | FSD | 12 hr |
| Mar 15, 3:28 PM CDT | Winter Storm Warning | FSD | 31 hr |
| Mar 16, 4:04 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 30, 3:05 PM CDT | Wind Advisory | FSD | 22 hr |
| Apr 2, 2:20 PM CDT | Winter Weather Advisory | FSD | 31 hr |
| Apr 11, 3:37 PM CDT | Winter Storm Watch | FSD | 24 hr |
| Apr 12, 3:45 PM CDT | Blizzard Warning | FSD | 60 hr |
| Apr 17, 3:33 AM CDT | Winter Weather Advisory | FSD | 38 hr |
| Apr 29, 3:41 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 30, 3:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 30, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 17, 10:50 PM CDT | Severe Thunderstorm Warning | FSD | 25 min |
| May 23, 2:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 24, 2:36 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 6:26 PM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Jun 1, 6:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 1, 6:47 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jun 6, 1:00 AM CDT | High Wind Warning | FSD | 3 hr |
| Jun 8, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 8, 8:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 8, 9:18 PM CDT | Severe Thunderstorm Warning | FSD | 57 min |
| Jun 8, 10:09 PM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Jun 8, 10:35 PM CDT | Severe Thunderstorm Warning | FSD | 55 min |
| Jun 16, 3:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 26, 11:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 27, 4:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 27, 4:34 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 27, 5:10 AM CDT | Severe Thunderstorm Warning | FSD | 35 min |
| Jun 27, 5:45 AM CDT | Severe Thunderstorm Warning | FSD | 45 min |
| Jun 27, 6:25 AM CDT | Severe Thunderstorm Warning | FSD | 35 min |
| Jun 27, 6:46 AM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Jun 27, 7:25 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 27, 7:29 AM CDT | Severe Thunderstorm Warning | FSD | 24 min |
| Jun 27, 8:06 AM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| Jun 27, 8:42 AM CDT | Severe Thunderstorm Warning | FSD | 48 min |
| Jun 27, 9:22 AM CDT | Severe Thunderstorm Warning | FSD | 38 min |
| Jul 3, 3:43 AM CDT | Heat Advisory | FSD | 16 hr |
| Jul 7, 3:01 PM CDT | Heat Advisory | FSD | 29 hr |
| Jul 10, 2:39 PM CDT | Heat Advisory | FSD | 53 hr |
| Jul 12, 3:24 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 7:21 PM CDT | Special Weather Statement | ABR | 24 min |
| Jul 18, 1:05 PM CDT | Severe Thunderstorm Warning | FSD | 40 min |
| Jul 18, 1:38 PM CDT | Flash Flood Warning | FSD | 4 hr |
| Jul 18, 1:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 2:46 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Jul 18, 3:43 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 18, 5:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 18, 5:58 PM CDT | Areal Flood Warning | FSD | 24 hr |
| Jul 18, 7:48 PM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Jul 18, 8:28 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Jul 22, 6:22 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 8:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 25, 1:54 AM CDT | Flash Flood Warning | FSD | 5 hr |
| Aug 3, 4:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 4, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 4, 11:29 PM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| Aug 4, 11:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 7:49 PM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Aug 23, 4:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 23, 6:25 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 23, 6:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 6:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 6:42 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 27, 9:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 27, 9:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 18, 2:48 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 2:40 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 19, 3:11 AM CDT | Special Weather Statement | ABR | 19 min |
| Sep 19, 10:31 AM CDT | Flash Flood Watch | FSD | 26 hr |
| Oct 3, 10:18 AM CDT | Wind Advisory | FSD | 11 hr |
| Oct 3, 3:30 PM CDT | Freeze Warning | FSD | 18 hr |
| Oct 5, 1:41 PM CDT | Frost Advisory | FSD | 19 hr |
| Oct 9, 11:55 AM CDT | Winter Weather Advisory | FSD | 25 hr |
| Oct 10, 3:18 PM CDT | Freeze Warning | FSD | 18 hr |
| Oct 11, 3:35 AM CDT | Freeze Warning | FSD | 29 hr |
| Oct 18, 10:14 AM CDT | Wind Advisory | FSD | 9 hr |
| Nov 16, 3:26 AM CST | Winter Weather Advisory | FSD | 25 hr |
| Nov 22, 4:24 AM CST | Dense Fog Advisory | FSD | 7 hr |
| Nov 28, 4:05 AM CST | Winter Weather Advisory | FSD | 17 hr |
| Nov 28, 2:25 PM CST | Winter Storm Watch | FSD | 48 hr |
| Nov 29, 2:45 PM CST | Winter Storm Warning | FSD | 69 hr |
| Nov 29, 9:09 PM CST | Dense Fog Advisory | FSD | 15 hr |
| Dec 25, 3:17 AM CST | Winter Storm Watch | FSD | 24 hr |
| Dec 25, 3:17 PM CST | Winter Storm Warning | FSD | 69 hr |
| Dec 26, 3:25 AM CST | Winter Weather Advisory | FSD | 57 hr |
| Dec 30, 3:33 PM CST | Winter Weather Advisory | FSD | 29 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 | 20 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 2 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.