Alert archive / South Dakota / Beadle County
Weather alerts in Beadle County, South Dakota, 2020
117 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Beadle County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 117
- Warnings
- 33
- Watches
- 16
- Advisories
- 39
- Busiest month
- June33 alerts
- Busiest day
- August 9, 20206 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 2 tornado warnings covering Beadle County in 2020 had a tornado report inside them.
Beadle County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 15 | 10 | 33% | 15 | 73% | 24 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 18 | 2 | 89% | 4 | 50% | 17 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 202 | 151 | 25% | 298 | 88% | 21 min |
| NWS Sioux Falls, SD: flash flood warnings | 13 | 9 | 31% | 17 | 71% | 67 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 4, 2:10 PM CST | Wind Advisory | FSD | 25 hr |
| Jan 10, 2:51 PM CST | Wind Chill Advisory | FSD | 18 hr |
| Jan 15, 2:44 PM CST | Wind Chill Advisory | FSD | 18 hr |
| Jan 15, 2:44 PM CST | Winter Storm Watch | FSD | 37 hr |
| Jan 16, 3:46 AM CST | Winter Weather Advisory | FSD | 8 hr |
| Jan 16, 11:34 AM CST | Winter Storm Warning | FSD | 36 hr |
| Jan 17, 3:57 AM CST | Blizzard Warning | FSD | 38 hr |
| Jan 17, 6:32 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 18, 3:43 AM CST | Wind Chill Advisory | FSD | 32 hr |
| Jan 18, 11:38 AM CST | Winter Weather Advisory | FSD | 6 hr |
| Jan 26, 2:01 PM CST | Winter Weather Advisory | FSD | 19 hr |
| Jan 29, 5:56 PM CST | Dense Fog Advisory | FSD | 42 hr |
| Feb 7, 3:08 AM CST | Winter Storm Watch | FSD | 24 hr |
| Feb 8, 3:37 AM CST | Winter Storm Warning | FSD | 30 hr |
| Feb 8, 3:37 AM CST | Winter Weather Advisory | FSD | 32 hr |
| Feb 8, 7:46 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 11, 3:32 PM CST | Blizzard Warning | FSD | 26 hr |
| Feb 11, 3:32 PM CST | Winter Weather Advisory | FSD | 26 hr |
| Feb 11, 8:35 PM CST | Wind Chill Warning | FSD | 36 hr |
| Feb 11, 8:35 PM CST | Wind Chill Advisory | FSD | 36 hr |
| Feb 13, 2:55 PM CST | Wind Chill Advisory | FSD | 16 hr |
| Mar 4, 8:48 AM CST | River Flood Warning | FSD | 152 days |
| Mar 4, 2:33 PM CST | Wind Advisory | FSD | 27 hr |
| Mar 19, 3:23 AM CDT | Wind Advisory | FSD | 19 hr |
| Mar 27, 3:41 PM CDT | Wind Advisory | FSD | 36 hr |
| Apr 1, 4:42 AM CDT | Winter Weather Advisory | FSD | 53 hr |
| Apr 8, 3:20 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 9, 10:01 AM CDT | Snow Squall Warning | FSD | 59 min |
| Apr 11, 3:08 AM CDT | Winter Weather Advisory | FSD | 43 hr |
| Apr 20, 3:44 AM CDT | Wind Advisory | FSD | 15 hr |
| May 7, 3:49 AM CDT | Freeze Warning | FSD | 29 hr |
| May 9, 3:38 AM CDT | Freeze Warning | FSD | 29 hr |
| May 9, 3:54 AM CDT | Wind Advisory | FSD | 17 hr |
| May 10, 4:20 AM CDT | Freeze Warning | FSD | 28 hr |
| Jun 4, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | 52 min |
| Jun 4, 9:01 PM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| Jun 6, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 6, 9:11 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 6, 11:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 7, 2:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 7, 3:31 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 8, 3:16 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 5:56 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 8, 6:08 PM CDT | Flash Flood Watch | FSD | 13 hr |
| Jun 8, 9:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 12:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 3:50 AM CDT | Wind Advisory | FSD | 27 hr |
| Jun 16, 3:31 AM CDT | Wind Advisory | FSD | 17 hr |
| Jun 17, 5:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 6:29 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 8:56 PM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Jun 17, 9:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 11:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 20, 1:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 20, 3:20 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 20, 7:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 25, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 25, 11:21 PM CDT | Flash Flood Warning | FSD | 6 hr |
| Jun 26, 2:31 AM CDT | Flash Flood Warning | FSD | 2 hr |
| Jun 26, 4:59 AM CDT | Areal Flood Warning | FSD | 9 hr |
| Jun 26, 2:02 PM CDT | Areal Flood Warning | FSD | 12 hr |
| Jun 27, 1:02 AM CDT | Areal Flood Warning | FSD | 36 hr |
| Jun 28, 3:22 PM CDT | Heat Advisory | FSD | 26 hr |
| Jun 30, 1:42 PM CDT | Flash Flood Watch | FSD | 11 hr |
| Jun 30, 5:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 9:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 12:30 AM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| Jul 5, 1:05 PM CDT | Severe Thunderstorm Warning | FSD | 23 min |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 5, 8:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 8, 5:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 9:47 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 8, 10:02 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 8, 10:32 PM CDT | Severe Thunderstorm Warning | FSD | 28 min |
| Jul 8, 10:46 PM CDT | Severe Thunderstorm Warning | FSD | 59 min |
| Jul 16, 2:34 PM CDT | Heat Advisory | FSD | 29 hr |
| Jul 17, 10:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 12:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 20, 1:13 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 3:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 20, 6:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 23, 3:03 AM CDT | Heat Advisory | FSD | 66 hr |
| Aug 8, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 8, 11:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 9, 12:31 AM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Aug 9, 12:56 AM CDT | Severe Thunderstorm Warning | FSD | 49 min |
| Aug 9, 1:32 AM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Aug 9, 1:46 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Aug 24, 3:54 AM CDT | Heat Advisory | FSD | 17 hr |
| Aug 25, 3:25 AM CDT | Heat Advisory | FSD | 17 hr |
| Aug 26, 3:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 27, 11:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 12:27 AM CDT | Severe Thunderstorm Warning | FSD | 63 min |
| Aug 28, 1:02 AM CDT | Severe Thunderstorm Warning | FSD | 28 min |
| Aug 30, 3:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 30, 4:55 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 30, 6:32 PM CDT | Severe Thunderstorm Warning | FSD | 58 min |
| Aug 30, 7:06 PM CDT | Tornado Warning | FSD | 24 min |
| Aug 30, 7:23 PM CDT | Tornado Warning | FSD | 17 min |
| Aug 30, 8:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 9, 3:36 AM CDT | Frost Advisory | FSD | 29 hr |
| Sep 29, 2:36 PM CDT | Wind Advisory | FSD | 29 hr |
| Oct 1, 3:12 AM CDT | Frost Advisory | FSD | 29 hr |
| Oct 3, 3:24 PM CDT | Frost Advisory | FSD | 18 hr |
| Oct 13, 2:40 PM CDT | Wind Advisory | FSD | 31 hr |
| Oct 21, 2:52 PM CDT | Winter Weather Advisory | FSD | 28 hr |
| Oct 23, 3:10 PM CDT | Winter Weather Advisory | FSD | 58 hr |
| Oct 30, 3:06 PM CDT | Wind Advisory | FSD | 29 hr |
| Nov 7, 2:33 PM CST | Wind Advisory | FSD | 27 hr |
| Nov 10, 9:42 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 21, 3:16 AM CST | Wind Advisory | FSD | 13 hr |
| Dec 22, 11:50 AM CST | Winter Weather Advisory | FSD | 15 hr |
| Dec 22, 2:38 PM CST | Blizzard Warning | FSD | 36 hr |
| Dec 28, 3:01 AM CST | Winter Weather Advisory | FSD | 42 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 | 15 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 12 |
| Mesoscale Discussion | 29 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 2 |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 3 |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 14 |
| 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 archive20192021
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.