Alert archive / South Dakota / Haakon County
Weather alerts in Haakon County, South Dakota, 2021
142 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Haakon County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 142
- Warnings
- 49
- Watches
- 23
- Advisories
- 26
- Busiest month
- August25 alerts
- Busiest day
- June 11, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Haakon County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 25 | 19 | 24% | 11 | 73% | 34 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 5 | 3 | 40% | 7 | 86% | 22 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 212 | 171 | 19% | 380 | 79% | 26 min |
| NWS Rapid City, SD: flash flood warnings | 2 | 0 | 100% | 0 |
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 11, 1:23 PM MST | High Wind Watch | UNR | 37 hr |
| Jan 13, 2:14 AM MST | High Wind Warning | UNR | 58 hr |
| Jan 29, 8:49 PM MST | Dense Fog Advisory | UNR | 14 hr |
| Feb 1, 8:02 PM MST | Dense Fog Advisory | UNR | 15 hr |
| Feb 2, 5:55 PM MST | Dense Fog Advisory | UNR | 16 hr |
| Feb 7, 8:10 PM MST | Wind Chill Advisory | UNR | 39 hr |
| Feb 9, 1:32 PM MST | Wind Chill Advisory | UNR | 4 days |
| Feb 11, 1:50 PM MST | Wind Chill Warning | UNR | 5 days |
| Feb 21, 1:41 PM MST | Wind Advisory | UNR | 27 hr |
| Feb 22, 2:23 PM MST | Wind Advisory | UNR | 27 hr |
| Feb 26, 2:00 PM MST | Winter Weather Advisory | UNR | 39 hr |
| Feb 27, 6:02 AM MST | Winter Storm Warning | UNR | 23 hr |
| Mar 5, 12:59 PM MST | Red Flag Warning | UNR | 30 hr |
| Mar 6, 5:17 AM MST | Dense Fog Advisory | UNR | 5 hr |
| Mar 9, 2:08 AM MST | Winter Weather Advisory | UNR | 41 hr |
| Mar 10, 12:12 AM MST | Mesoscale Discussion | SPC | 6 hr |
| Mar 12, 1:44 PM MST | Winter Storm Warning | UNR | 66 hr |
| Mar 13, 2:26 AM MST | Winter Weather Advisory | UNR | 47 hr |
| Mar 14, 5:20 PM MDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 26, 2:00 PM MDT | Fire Weather Watch | UNR | 37 hr |
| Mar 27, 2:24 AM MDT | High Wind Watch | UNR | 36 hr |
| Mar 27, 1:56 PM MDT | Red Flag Warning | UNR | 3 days |
| Mar 28, 2:23 AM MDT | High Wind Warning | UNR | 46 hr |
| Mar 28, 1:59 PM MDT | Red Flag Warning | UNR | 54 hr |
| Mar 29, 2:45 PM MDT | Wind Advisory | UNR | 29 hr |
| Mar 31, 3:01 AM MDT | Fire Weather Watch | UNR | 11 hr |
| Mar 31, 1:37 PM MDT | Red Flag Warning | UNR | 53 hr |
| Apr 1, 2:16 PM MDT | Red Flag Warning | UNR | 29 hr |
| Apr 3, 2:34 AM MDT | Red Flag Warning | UNR | 16 hr |
| Apr 5, 3:13 AM MDT | Red Flag Warning | UNR | 16 hr |
| Apr 8, 2:31 PM MDT | Wind Advisory | UNR | 25 hr |
| Apr 10, 2:27 PM MDT | Wind Advisory | UNR | 3 days |
| May 20, 10:58 PM MDT | Severe Thunderstorm Warning | UNR | 47 min |
| May 20, 11:41 PM MDT | Severe Thunderstorm Warning | UNR | 49 min |
| May 21, 12:27 AM MDT | Severe Thunderstorm Warning | UNR | 41 min |
| May 21, 8:26 PM MDT | Special Weather Statement | UNR | 49 min |
| May 21, 8:42 PM MDT | Severe Thunderstorm Warning | UNR | 31 min |
| May 21, 9:04 PM MDT | Mesoscale Discussion | SPC | 86 min |
| May 21, 9:43 PM MDT | Special Weather Statement | UNR | 47 min |
| May 21, 11:36 PM MDT | Special Weather Statement | UNR | 54 min |
| May 23, 12:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 1:50 PM MDT | Tornado Watch | SPC | 7 hr |
| May 23, 5:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| May 23, 5:53 PM MDT | Severe Thunderstorm Warning | UNR | 67 min |
| May 23, 6:45 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jun 7, 2:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 8, 2:17 PM MDT | Special Weather Statement | UNR | 28 min |
| Jun 8, 2:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jun 8, 2:24 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jun 8, 10:17 PM MDT | Special Weather Statement | UNR | 58 min |
| Jun 8, 10:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 8, 10:50 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jun 8, 10:58 PM MDT | Special Weather Statement | UNR | 62 min |
| Jun 9, 12:06 AM MDT | Special Weather Statement | UNR | 54 min |
| Jun 10, 3:35 AM MDT | Heat Advisory | UNR | 15 hr |
| Jun 10, 2:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 10, 7:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 10, 8:08 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 10, 10:07 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 10, 10:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 10, 11:05 PM MDT | Severe Thunderstorm Warning | UNR | 70 min |
| Jun 10, 11:12 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jun 11, 12:18 AM MDT | Severe Thunderstorm Warning | UNR | 22 min |
| Jun 13, 10:50 AM MDT | Special Weather Statement | UNR | 25 min |
| Jun 16, 2:22 AM MDT | Wind Advisory | UNR | 13 hr |
| Jun 19, 8:20 AM MDT | Special Weather Statement | UNR | 25 min |
| Jun 20, 12:23 AM MDT | Special Weather Statement | UNR | 37 min |
| Jul 3, 3:33 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 4:58 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 3, 5:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 3, 7:55 PM MDT | Special Weather Statement | UNR | 35 min |
| Jul 3, 8:33 PM MDT | Special Weather Statement | UNR | 27 min |
| Jul 5, 12:34 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 5, 7:17 PM MDT | Special Weather Statement | UNR | 28 min |
| Jul 8, 3:49 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 6:08 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 8, 8:32 PM MDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jul 8, 9:28 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 8, 9:30 PM MDT | Severe Thunderstorm Warning | UNR | 24 min |
| Jul 8, 10:25 PM MDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jul 16, 3:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 6:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 16, 7:18 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jul 25, 2:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 2:03 AM MDT | Heat Advisory | UNR | 66 hr |
| Jul 31, 4:23 AM MDT | Dense Fog Advisory | UNR | 5 hr |
| Aug 6, 7:06 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Aug 6, 7:50 PM MDT | Special Weather Statement | UNR | 55 min |
| Aug 6, 8:54 PM MDT | Special Weather Statement | UNR | 36 min |
| Aug 9, 3:36 AM MDT | Fire Weather Watch | UNR | 24 hr |
| Aug 10, 3:10 AM MDT | Red Flag Warning | UNR | 18 hr |
| Aug 14, 3:28 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 4:40 PM MDT | Severe Thunderstorm Warning | UNR | 31 min |
| Aug 16, 1:41 PM MDT | Fire Weather Watch | UNR | 13 hr |
| Aug 16, 1:41 PM MDT | Red Flag Warning | UNR | 30 hr |
| Aug 19, 4:22 PM MDT | Special Weather Statement | UNR | 23 min |
| Aug 22, 5:21 AM MDT | Special Weather Statement | UNR | 84 min |
| Aug 23, 5:15 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Aug 23, 6:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 6:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 7:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 26, 9:33 PM MDT | Special Weather Statement | UNR | 42 min |
| Aug 26, 10:17 PM MDT | Special Weather Statement | UNR | 58 min |
| Aug 26, 10:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Aug 27, 1:23 AM MDT | Special Weather Statement | UNR | 52 min |
| Aug 30, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 30, 6:25 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 30, 7:41 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Aug 30, 8:46 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Aug 30, 8:57 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 30, 9:26 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Sep 1, 4:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 1, 5:26 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 1, 8:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Sep 1, 10:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Sep 4, 1:39 PM MDT | Fire Weather Watch | UNR | 24 hr |
| Sep 5, 1:44 PM MDT | Red Flag Warning | UNR | 29 hr |
| Sep 13, 5:24 AM MDT | Special Weather Statement | UNR | 51 min |
| Sep 17, 2:44 AM MDT | Fire Weather Watch | UNR | 11 hr |
| Sep 17, 1:17 PM MDT | Red Flag Warning | UNR | 32 hr |
| Sep 19, 2:36 AM MDT | Wind Advisory | UNR | 23 hr |
| Sep 23, 1:58 PM MDT | Fire Weather Watch | UNR | 12 hr |
| Oct 6, 2:36 AM MDT | Red Flag Warning | UNR | 16 hr |
| Oct 9, 4:50 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Oct 12, 2:03 PM MDT | High Wind Warning | UNR | 29 hr |
| Oct 13, 2:45 PM MDT | Freeze Warning | UNR | 18 hr |
| Oct 28, 8:55 AM MDT | Wind Advisory | UNR | 7 hr |
| Nov 10, 8:03 AM MST | High Wind Watch | UNR | 5 hr |
| Nov 10, 8:03 AM MST | High Wind Warning | UNR | 39 hr |
| Nov 11, 8:57 PM MST | Wind Advisory | UNR | 16 hr |
| Nov 12, 1:20 PM MST | High Wind Watch | UNR | 13 hr |
| Nov 13, 2:05 AM MST | High Wind Warning | UNR | 18 hr |
| Nov 13, 2:05 AM MST | Wind Advisory | UNR | 18 hr |
| Nov 15, 1:46 AM MST | Fire Weather Watch | UNR | 13 hr |
| Nov 15, 2:28 PM MST | Red Flag Warning | UNR | 27 hr |
| Nov 16, 1:56 AM MST | Wind Advisory | UNR | 17 hr |
| Nov 16, 2:41 PM MST | Wind Advisory | UNR | 26 hr |
| Dec 4, 2:00 AM MST | High Wind Watch | UNR | 12 hr |
| Dec 4, 2:04 PM MST | High Wind Warning | UNR | 27 hr |
| Dec 9, 2:10 AM MST | Winter Weather Advisory | UNR | 36 hr |
| Dec 14, 2:33 AM MST | High Wind Warning | UNR | 42 hr |
| Dec 14, 1:45 PM MST | Winter Weather Advisory | UNR | 30 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 | 25 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 21 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 7 |
| High Wind Watch | 5 |
| Wind Advisory | 12 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.