Alert archive / South Dakota / Bennett County
Weather alerts in Bennett County, South Dakota, 2018
130 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bennett County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 130
- Warnings
- 25
- Watches
- 20
- Advisories
- 22
- Busiest month
- June35 alerts
- Busiest day
- July 29, 20186 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 1 tornado warnings covering Bennett County in 2018 had a tornado report inside them.
Bennett County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 16 | 10 | 38% | 4 | 100% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 18 | 6 | 67% | 14 | 64% | 18 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 376 | 273 | 27% | 586 | 84% | 24 min |
| NWS Rapid City, SD: flash flood warnings | 13 | 8 | 38% | 16 | 69% | 42 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 1, 1:31 PM MST | Wind Chill Advisory | UNR | 19 hr |
| Jan 9, 2:23 AM MST | Winter Weather Advisory | UNR | 47 hr |
| Jan 14, 2:47 AM MST | Wind Chill Advisory | UNR | 55 hr |
| Jan 19, 2:57 AM MST | Winter Storm Watch | UNR | 24 hr |
| Jan 20, 2:53 AM MST | Winter Storm Warning | UNR | 48 hr |
| Feb 7, 2:42 PM MST | Winter Weather Advisory | UNR | 49 hr |
| Feb 9, 3:04 PM MST | Wind Chill Advisory | UNR | 18 hr |
| Feb 16, 2:11 PM MST | Winter Storm Watch | UNR | 48 hr |
| Feb 17, 1:55 PM MST | Winter Storm Warning | UNR | 64 hr |
| Feb 20, 1:45 PM MST | Wind Chill Advisory | UNR | 19 hr |
| Mar 2, 3:19 AM MST | Winter Storm Watch | UNR | 48 hr |
| Mar 3, 1:18 PM MST | Dense Fog Advisory | UNR | 22 hr |
| Mar 4, 3:22 AM MST | High Wind Warning | UNR | 41 hr |
| Mar 5, 8:11 PM MST | Wind Advisory | UNR | 15 hr |
| Mar 14, 1:52 AM MDT | Winter Storm Watch | UNR | 37 hr |
| Mar 15, 3:21 AM MDT | Winter Storm Warning | UNR | 39 hr |
| Mar 16, 3:04 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 30, 2:24 PM MDT | Wind Advisory | UNR | 14 hr |
| Apr 5, 2:49 AM MDT | Winter Weather Advisory | UNR | 33 hr |
| Apr 10, 2:45 PM MDT | Winter Storm Watch | UNR | 44 hr |
| Apr 12, 3:16 AM MDT | Blizzard Warning | UNR | 57 hr |
| Apr 13, 3:52 AM MDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 29, 12:49 AM MDT | Wind Advisory | UNR | 18 hr |
| Apr 29, 9:54 PM MDT | Special Weather Statement | UNR | 36 min |
| Apr 29, 10:26 PM MDT | Special Weather Statement | UNR | 34 min |
| May 17, 12:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 17, 1:23 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 17, 6:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| May 17, 7:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| May 17, 7:38 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| May 17, 8:38 PM MDT | Severe Thunderstorm Warning | UNR | 82 min |
| May 17, 9:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 22, 6:10 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| May 22, 7:05 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| May 23, 1:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 7:06 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| May 23, 7:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 23, 7:56 PM MDT | Severe Thunderstorm Warning | UNR | 49 min |
| May 27, 5:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| May 27, 5:27 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 5:59 PM MDT | Special Weather Statement | LBF | 31 min |
| May 27, 6:26 PM MDT | Special Weather Statement | UNR | 34 min |
| May 27, 7:01 PM MDT | Special Weather Statement | UNR | 29 min |
| May 27, 7:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 6, 10:50 PM MDT | Special Weather Statement | LBF | 40 min |
| Jun 8, 1:01 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 8, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 8, 4:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 8, 5:34 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jun 8, 6:04 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jun 8, 6:26 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jun 8, 6:54 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 8, 7:02 PM MDT | Special Weather Statement | LBF | 43 min |
| Jun 8, 7:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 13, 8:59 AM MDT | Special Weather Statement | UNR | 46 min |
| Jun 13, 9:17 AM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jun 13, 10:14 AM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 14, 1:58 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 14, 6:17 PM MDT | Special Weather Statement | UNR | 43 min |
| Jun 16, 2:15 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 2:37 PM MDT | Flash Flood Watch | UNR | 15 hr |
| Jun 16, 2:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 16, 5:14 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jun 16, 6:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jun 16, 8:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 18, 1:46 PM MDT | Flash Flood Watch | UNR | 51 hr |
| Jun 22, 2:12 PM MDT | Flood Watch | UNR | 54 hr |
| Jun 22, 4:31 PM MDT | Special Weather Statement | UNR | 44 min |
| Jun 22, 5:23 PM MDT | Special Weather Statement | UNR | 37 min |
| Jun 22, 6:03 PM MDT | Special Weather Statement | UNR | 42 min |
| Jun 22, 6:13 PM MDT | Severe Thunderstorm Warning | UNR | 47 min |
| Jun 22, 6:40 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| Jun 23, 4:30 PM MDT | Special Weather Statement | UNR | 30 min |
| Jun 23, 4:44 PM MDT | Special Weather Statement | LBF | 46 min |
| Jun 28, 5:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jun 29, 5:19 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 9:16 PM MDT | Special Weather Statement | LBF | 29 min |
| Jun 29, 9:23 PM MDT | Special Weather Statement | UNR | 52 min |
| Jul 3, 4:42 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 8:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 2:00 PM MDT | Heat Advisory | UNR | 53 hr |
| Jul 16, 2:52 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 16, 6:11 PM MDT | Special Weather Statement | UNR | 49 min |
| Jul 17, 10:04 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 18, 2:43 PM MDT | Tornado Watch | SPC | 7 hr |
| Jul 18, 4:16 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 21, 11:47 PM MDT | Special Weather Statement | UNR | 43 min |
| Jul 22, 12:54 AM MDT | Special Weather Statement | LBF | 51 min |
| Jul 24, 11:06 PM MDT | Special Weather Statement | UNR | 24 min |
| Jul 25, 12:23 AM MDT | Special Weather Statement | UNR | 52 min |
| Jul 25, 12:52 AM MDT | Special Weather Statement | LBF | 53 min |
| Jul 27, 4:55 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 1:34 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 1:38 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jul 29, 2:07 PM MDT | Tornado Warning | UNR | 38 min |
| Jul 29, 2:46 PM MDT | Severe Thunderstorm Warning | UNR | 27 min |
| Jul 29, 3:10 PM MDT | Special Weather Statement | LBF | 50 min |
| Jul 29, 4:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 4, 11:26 PM MDT | Special Weather Statement | LBF | 49 min |
| Aug 5, 12:16 AM MDT | Special Weather Statement | UNR | 44 min |
| Aug 6, 5:22 PM MDT | Special Weather Statement | UNR | 38 min |
| Aug 15, 7:19 AM MDT | Special Weather Statement | UNR | 41 min |
| Aug 15, 7:25 AM MDT | Severe Thunderstorm Warning | UNR | 34 min |
| Aug 15, 8:03 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 8:04 AM MDT | Special Weather Statement | UNR | 26 min |
| Aug 15, 10:14 AM MDT | Special Weather Statement | LBF | 46 min |
| Aug 18, 1:45 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 5:25 PM MDT | Special Weather Statement | UNR | 20 min |
| Aug 25, 5:36 PM MDT | Special Weather Statement | UNR | 39 min |
| Aug 25, 6:17 PM MDT | Special Weather Statement | UNR | 43 min |
| Aug 27, 2:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Sep 1, 6:18 PM MDT | Special Weather Statement | UNR | 42 min |
| Sep 25, 1:32 PM MDT | Frost Advisory | UNR | 18 hr |
| Oct 3, 3:29 AM MDT | Freeze Watch | UNR | 11 hr |
| Oct 3, 3:29 AM MDT | Wind Advisory | UNR | 15 hr |
| Oct 3, 2:18 PM MDT | Freeze Warning | UNR | 18 hr |
| Oct 9, 4:02 AM MDT | Winter Weather Advisory | UNR | 31 hr |
| Oct 18, 9:06 AM MDT | Wind Advisory | UNR | 9 hr |
| Nov 16, 8:40 PM MST | Winter Weather Advisory | UNR | 8 hr |
| Nov 23, 2:25 PM MST | Winter Weather Advisory | UNR | 36 hr |
| Nov 28, 1:36 PM MST | Winter Storm Watch | UNR | 38 hr |
| Nov 29, 2:01 PM MST | Winter Storm Warning | UNR | 66 hr |
| Nov 30, 3:24 AM MST | Winter Weather Advisory | UNR | 48 hr |
| Dec 1, 1:17 AM MST | Mesoscale Discussion | SPC | 6 hr |
| Dec 18, 2:18 PM MST | Wind Advisory | UNR | 27 hr |
| Dec 24, 1:58 PM MST | Winter Storm Watch | UNR | 24 hr |
| Dec 25, 2:50 AM MST | Winter Weather Advisory | UNR | 3 days |
| Dec 25, 2:03 PM MST | Winter Storm Warning | UNR | 39 hr |
| Dec 29, 2:19 PM MST | Winter Weather Advisory | UNR | 51 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 | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 33 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 6 |
| 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 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.