Alert archive / South Dakota / Harding County
Weather alerts in Harding County, South Dakota, 2020
160 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Harding County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 160
- Warnings
- 50
- Watches
- 27
- Advisories
- 37
- Busiest month
- July42 alerts
- Busiest day
- July 5, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Harding County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 39 | 30 | 23% | 47 | 83% | 29 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 11 | 2 | 82% | 11 | 27% | 18 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 415 | 336 | 19% | 828 | 89% | 27 min |
| NWS Rapid City, SD: flash flood warnings | 10 | 7 | 30% | 11 | 91% | 88 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, 12:55 PM MST | Wind Advisory | UNR | 40 hr |
| Jan 6, 2:19 AM MST | Wind Advisory | UNR | 15 hr |
| Jan 15, 2:20 AM MST | Wind Chill Advisory | UNR | 10 hr |
| Jan 16, 2:50 AM MST | High Wind Watch | UNR | 24 hr |
| Jan 17, 2:22 AM MST | High Wind Warning | UNR | 24 hr |
| Jan 17, 12:57 PM MST | Wind Chill Advisory | UNR | 21 hr |
| Jan 30, 1:46 AM MST | Wind Advisory | UNR | 18 hr |
| Jan 30, 9:30 AM MST | High Wind Warning | UNR | 12 hr |
| Feb 1, 1:48 AM MST | Wind Advisory | UNR | 22 hr |
| Feb 7, 2:15 PM MST | Winter Weather Advisory | UNR | 38 hr |
| Feb 12, 1:38 AM MST | Wind Chill Advisory | UNR | 31 hr |
| Feb 24, 2:28 AM MST | Winter Weather Advisory | UNR | 36 hr |
| Mar 1, 8:28 AM MST | Wind Advisory | UNR | 7 hr |
| Mar 3, 1:50 AM MST | High Wind Warning | UNR | 15 hr |
| Mar 4, 1:19 PM MST | Wind Advisory | UNR | 9 hr |
| Mar 4, 3:25 PM MST | Severe Thunderstorm Warning | UNR | 65 min |
| Mar 18, 2:10 AM MDT | Winter Weather Advisory | UNR | 40 hr |
| Mar 31, 2:05 PM MDT | Winter Weather Advisory | UNR | 58 hr |
| Apr 8, 2:36 AM MDT | Wind Advisory | UNR | 16 hr |
| Apr 10, 2:35 PM MDT | Winter Weather Advisory | UNR | 39 hr |
| Apr 20, 2:38 AM MDT | Wind Advisory | UNR | 15 hr |
| Apr 27, 1:44 PM MDT | High Wind Watch | UNR | 13 hr |
| Apr 28, 2:42 AM MDT | High Wind Warning | UNR | 17 hr |
| May 3, 2:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 6:29 PM MDT | Severe Thunderstorm Warning | UNR | 76 min |
| May 8, 1:44 PM MDT | High Wind Watch | UNR | 6 hr |
| May 8, 1:44 PM MDT | Wind Advisory | UNR | 30 hr |
| May 9, 9:05 AM MDT | High Wind Warning | UNR | 6 hr |
| May 18, 8:22 AM MDT | Wind Advisory | UNR | 11 hr |
| May 20, 8:46 AM MDT | Wind Advisory | UNR | 11 hr |
| May 23, 11:24 AM MDT | Flash Flood Watch | UNR | 10 hr |
| May 23, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 2:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 23, 5:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| May 31, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 31, 7:09 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| May 31, 7:38 PM MDT | Mesoscale Discussion | SPC | 97 min |
| May 31, 7:57 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| May 31, 8:55 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jun 2, 3:56 AM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 3, 12:35 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 3, 1:05 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 4, 1:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 2:16 PM MDT | Special Weather Statement | UNR | 29 min |
| Jun 4, 2:27 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 2:42 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jun 6, 2:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 6, 4:49 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 6, 6:40 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jun 6, 7:19 PM MDT | Severe Thunderstorm Warning | UNR | 26 min |
| Jun 6, 7:43 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jun 7, 2:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 2:35 AM MDT | Wind Advisory | UNR | 18 hr |
| Jun 14, 1:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 14, 2:20 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 14, 2:43 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jun 14, 3:44 PM MDT | Severe Thunderstorm Warning | UNR | 31 min |
| Jun 21, 1:05 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 28, 4:52 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jun 28, 5:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 28, 5:55 PM MDT | Special Weather Statement | UNR | 35 min |
| Jun 28, 6:07 PM MDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jun 29, 2:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 3:56 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 29, 6:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 4:41 PM MDT | Special Weather Statement | UNR | 64 min |
| Jul 2, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 2, 3:12 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jul 3, 2:47 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 3, 5:30 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 3, 7:23 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jul 3, 8:29 PM MDT | Special Weather Statement | UNR | 31 min |
| Jul 3, 8:54 PM MDT | Special Weather Statement | UNR | 36 min |
| Jul 3, 11:59 PM MDT | Special Weather Statement | UNR | 31 min |
| Jul 4, 9:02 PM MDT | Special Weather Statement | UNR | 58 min |
| Jul 4, 9:13 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 4, 10:06 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 4, 10:14 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jul 5, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 5:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jul 5, 5:40 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jul 5, 6:24 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jul 5, 6:27 PM MDT | Severe Thunderstorm Warning | UNR | 37 min |
| Jul 5, 6:39 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jul 6, 12:49 AM MDT | Special Weather Statement | UNR | 56 min |
| Jul 6, 1:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 6, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 5:14 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 7, 6:13 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 7, 8:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 7, 9:06 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 7, 9:41 PM MDT | Special Weather Statement | UNR | 34 min |
| Jul 7, 10:12 PM MDT | Special Weather Statement | UNR | 48 min |
| Jul 10, 12:26 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 1:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 2:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 6:06 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 23, 1:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:27 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 2:52 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 23, 3:18 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jul 23, 3:49 PM MDT | Severe Thunderstorm Warning | UNR | 26 min |
| Jul 23, 4:09 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jul 23, 5:12 PM MDT | Severe Thunderstorm Warning | UNR | 36 min |
| Jul 31, 2:10 PM MDT | Special Weather Statement | UNR | 50 min |
| Jul 31, 2:47 PM MDT | Special Weather Statement | UNR | 28 min |
| Jul 31, 3:15 PM MDT | Special Weather Statement | UNR | 45 min |
| Aug 6, 7:31 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 6, 8:08 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| Aug 11, 5:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 6:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 6:53 PM MDT | Severe Thunderstorm Warning | UNR | 52 min |
| Aug 11, 7:45 PM MDT | Special Weather Statement | UNR | 45 min |
| Aug 11, 7:57 PM MDT | Special Weather Statement | UNR | 63 min |
| Aug 11, 8:09 PM MDT | Severe Thunderstorm Warning | UNR | 29 min |
| Aug 11, 8:22 PM MDT | Severe Thunderstorm Warning | UNR | 68 min |
| Aug 11, 9:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 13, 11:35 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Aug 14, 12:35 AM MDT | Special Weather Statement | UNR | 40 min |
| Aug 14, 1:00 AM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Aug 14, 2:19 AM MDT | Special Weather Statement | UNR | 41 min |
| Aug 27, 10:27 AM MDT | Special Weather Statement | UNR | 63 min |
| Aug 27, 4:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 27, 5:02 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Aug 27, 5:31 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 27, 5:49 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Aug 27, 6:35 PM MDT | Severe Thunderstorm Warning | UNR | 36 min |
| Aug 27, 7:34 PM MDT | Severe Thunderstorm Warning | UNR | 25 min |
| Aug 27, 8:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Aug 30, 2:23 AM MDT | Wind Advisory | UNR | 17 hr |
| Sep 1, 1:51 PM MDT | Wind Advisory | UNR | 33 hr |
| Sep 8, 1:51 PM MDT | Freeze Warning | UNR | 18 hr |
| Sep 24, 6:45 PM MDT | Wind Advisory | UNR | 7 hr |
| Sep 25, 2:00 PM MDT | Wind Advisory | UNR | 30 hr |
| Sep 26, 7:32 PM MDT | Wind Advisory | UNR | 23 hr |
| Sep 29, 1:34 PM MDT | Wind Advisory | UNR | 29 hr |
| Oct 11, 8:40 AM MDT | Wind Advisory | UNR | 8 hr |
| Oct 12, 3:35 AM MDT | Wind Advisory | UNR | 17 hr |
| Oct 13, 2:45 AM MDT | High Wind Watch | UNR | 11 hr |
| Oct 13, 1:50 PM MDT | High Wind Warning | UNR | 28 hr |
| Oct 20, 1:57 PM MDT | Winter Storm Watch | UNR | 25 hr |
| Oct 21, 2:29 PM MDT | Winter Weather Advisory | UNR | 24 hr |
| Oct 22, 2:42 PM MDT | Winter Storm Watch | UNR | 23 hr |
| Oct 23, 2:05 PM MDT | Winter Weather Advisory | UNR | 47 hr |
| Oct 30, 2:30 AM MDT | High Wind Watch | UNR | 18 hr |
| Oct 30, 8:04 PM MDT | High Wind Warning | UNR | 22 hr |
| Nov 7, 3:32 AM MST | Dense Fog Advisory | UNR | 5 hr |
| Nov 7, 1:39 PM MST | Wind Advisory | UNR | 28 hr |
| Nov 13, 2:26 AM MST | High Wind Watch | UNR | 12 hr |
| Nov 13, 2:14 PM MST | High Wind Warning | UNR | 24 hr |
| Nov 13, 2:14 PM MST | Wind Advisory | UNR | 32 hr |
| Nov 26, 2:05 AM MST | Wind Advisory | UNR | 16 hr |
| Nov 30, 2:30 PM MST | Wind Advisory | UNR | 27 hr |
| Dec 11, 7:19 PM MST | Dense Fog Advisory | UNR | 14 hr |
| Dec 20, 1:57 AM MST | Wind Advisory | UNR | 17 hr |
| Dec 20, 3:26 PM MST | High Wind Warning | UNR | 4 hr |
| Dec 21, 1:45 PM MST | High Wind Watch | UNR | 13 hr |
| Dec 22, 3:13 AM MST | High Wind Warning | UNR | 34 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 | 39 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 18 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 10 |
| High Wind Watch | 7 |
| Wind Advisory | 25 |
| 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 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.