Alert archive / South Dakota / Hamlin County
Weather alerts in Hamlin County, South Dakota, 2012
104 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hamlin County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 104
- Warnings
- 23
- Watches
- 17
- Advisories
- 39
- Busiest month
- May17 alerts
- Busiest day
- May 6, 20128 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering Hamlin County in 2012 had a tornado report inside them.
Hamlin County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 13 | 12 | 8% | 3 | 100% | 17 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 13 | 5 | 62% | 9 | 56% | 16 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 189 | 124 | 34% | 274 | 84% | 22 min |
| NWS Aberdeen, SD: flash flood warnings | 5 | 4 | 20% | 8 | 100% | 60 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 10, 2:20 PM CST | Wind Advisory | ABR | 28 hr |
| Jan 18, 3:18 AM CST | Extreme Cold Warning | ABR | 33 hr |
| Jan 20, 3:24 PM CST | Winter Storm Watch | ABR | 12 hr |
| Jan 21, 3:21 AM CST | Winter Weather Advisory | ABR | 45 hr |
| Jan 25, 9:01 AM CST | Dense Fog Advisory | ABR | 3 hr |
| Feb 2, 5:45 PM CST | Dense Fog Advisory | ABR | 42 hr |
| Feb 19, 2:37 PM CST | Winter Weather Advisory | ABR | 33 hr |
| Feb 22, 11:03 AM CST | Winter Storm Watch | ABR | 5 hr |
| Feb 22, 3:52 PM CST | Winter Storm Warning | ABR | 6 hr |
| Feb 25, 2:24 PM CST | Winter Weather Advisory | ABR | 25 hr |
| Feb 26, 3:21 AM CST | Winter Storm Watch | ABR | 12 hr |
| Feb 26, 3:20 PM CST | Blizzard Watch | ABR | 23 hr |
| Feb 27, 2:19 PM CST | Winter Storm Warning | ABR | 47 hr |
| Feb 28, 11:43 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 1, 3:17 AM CST | Dense Fog Advisory | ABR | 8 hr |
| Mar 4, 8:22 AM CST | Winter Weather Advisory | ABR | 4 hr |
| Mar 5, 12:23 AM CST | Dense Fog Advisory | ABR | 6 hr |
| Mar 19, 1:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 23, 1:19 AM CDT | Dense Fog Advisory | ABR | 10 hr |
| Mar 25, 3:19 PM CDT | High Wind Watch | ABR | 20 hr |
| Mar 26, 3:20 AM CDT | Wind Advisory | ABR | 16 hr |
| Mar 26, 11:45 AM CDT | High Wind Warning | ABR | 28 hr |
| Mar 26, 7:14 PM CDT | Wind Advisory | ABR | 24 hr |
| Mar 30, 12:02 AM CDT | Dense Fog Advisory | ABR | 11 hr |
| Apr 1, 3:58 AM CDT | Dense Fog Advisory | ABR | 6 hr |
| Apr 5, 3:10 PM CDT | Wind Advisory | ABR | 29 hr |
| Apr 7, 3:32 AM CDT | Wind Advisory | ABR | 16 hr |
| Apr 14, 3:28 PM CDT | Wind Advisory | ABR | 31 hr |
| Apr 15, 12:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 15, 5:32 PM CDT | High Wind Warning | ABR | 10 hr |
| Apr 16, 3:22 AM CDT | Wind Advisory | ABR | 4 hr |
| May 1, 2:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 5, 9:50 AM CDT | Mesoscale Discussion | SPC | 55 min |
| May 5, 2:57 PM CDT | Flash Flood Watch | ABR | 8 hr |
| May 5, 7:48 PM CDT | Severe Thunderstorm Warning | ABR | 57 min |
| May 5, 7:59 PM CDT | Severe Thunderstorm Warning | ABR | 61 min |
| May 5, 8:18 PM CDT | Severe Thunderstorm Warning | ABR | 57 min |
| May 5, 8:18 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 5, 8:36 PM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| May 5, 8:43 PM CDT | Severe Thunderstorm Warning | ABR | 47 min |
| May 5, 8:43 PM CDT | Severe Thunderstorm Warning | ABR | 60 min |
| May 5, 9:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 7, 9:52 AM CDT | Wind Advisory | ABR | 8 hr |
| May 10, 5:06 PM CDT | Wind Advisory | ABR | 10 hr |
| May 17, 2:42 PM CDT | Wind Advisory | ABR | 5 hr |
| May 21, 3:02 PM CDT | Wind Advisory | ABR | 23 hr |
| May 23, 2:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 26, 5:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 1, 7:57 PM CDT | Severe Thunderstorm Warning | ABR | 48 min |
| Jun 1, 8:50 PM CDT | Tornado Warning | ABR | 25 min |
| Jun 17, 2:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 3:45 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 17, 7:24 PM CDT | Severe Thunderstorm Warning | ABR | 51 min |
| Jun 17, 8:05 PM CDT | Severe Thunderstorm Warning | ABR | 40 min |
| Jun 17, 8:11 PM CDT | Tornado Warning | ABR | 34 min |
| Jun 18, 9:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 18, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 18, 11:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 19, 2:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 19, 4:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 19, 6:08 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 9:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 19, 11:20 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 20, 4:00 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 29, 7:59 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 1, 2:44 PM CDT | Heat Advisory | ABR | 3 days |
| Jul 12, 2:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 14, 3:00 PM CDT | Heat Advisory | ABR | 53 hr |
| Jul 21, 10:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 29, 5:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 1, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 1, 4:53 PM CDT | Severe Thunderstorm Warning | ABR | 41 min |
| Aug 1, 7:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 3, 2:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 6:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 3, 6:35 PM CDT | Severe Thunderstorm Warning | ABR | 25 min |
| Aug 3, 6:53 PM CDT | Severe Thunderstorm Warning | ABR | 67 min |
| Aug 3, 7:59 PM CDT | Severe Thunderstorm Warning | ABR | 31 min |
| Aug 15, 2:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 15, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 26, 6:40 AM CDT | Dense Fog Advisory | ABR | 3 hr |
| Sep 2, 3:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Sep 17, 1:51 PM CDT | Frost Advisory | ABR | 19 hr |
| Sep 21, 3:10 PM CDT | Freeze Watch | ABR | 12 hr |
| Sep 22, 3:04 AM CDT | Freeze Warning | ABR | 30 hr |
| Oct 3, 3:25 PM CDT | Wind Advisory | ABR | 28 hr |
| Oct 12, 11:29 AM CDT | Wind Advisory | ABR | 8 hr |
| Oct 16, 12:04 PM CDT | High Wind Watch | ABR | 27 hr |
| Oct 16, 12:04 PM CDT | Wind Advisory | ABR | 66 hr |
| Oct 23, 9:49 AM CDT | Dense Fog Advisory | ABR | 3 hr |
| Nov 10, 4:05 AM CST | Winter Weather Advisory | ABR | 24 hr |
| Nov 10, 5:10 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Nov 21, 4:05 AM CST | Wind Advisory | ABR | 41 hr |
| Nov 28, 4:54 AM CST | Dense Fog Advisory | ABR | 4 hr |
| Dec 2, 12:23 AM CST | Dense Fog Advisory | ABR | 8 hr |
| Dec 6, 2:35 PM CST | Winter Weather Advisory | ABR | 27 hr |
| Dec 7, 4:08 AM CST | Winter Storm Watch | ABR | 24 hr |
| Dec 8, 4:02 AM CST | Blizzard Warning | ABR | 38 hr |
| Dec 8, 4:02 AM CST | Winter Storm Warning | ABR | 23 hr |
| Dec 8, 1:43 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 9, 9:01 PM CST | Wind Chill Advisory | ABR | 12 hr |
| Dec 13, 7:48 PM CST | Dense Fog Advisory | ABR | 13 hr |
| Dec 14, 3:39 AM CST | Winter Weather Advisory | ABR | 38 hr |
| Dec 24, 3:31 AM CST | Wind Chill Advisory | ABR | 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 | 13 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 25 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 15 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.