Alert archive / South Dakota / Turner County
Weather alerts in Turner County, South Dakota, 2011
92 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Turner County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 92
- Warnings
- 32
- Watches
- 13
- Advisories
- 33
- Busiest month
- May19 alerts
- Busiest day
- May 30, 20117 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Turner County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 19 | 7 | 63% | 0 | ||
| Flash flood warnings | 2 | 2 | 0% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Sioux Falls, SD: tornado warnings | 38 | 10 | 74% | 15 | 73% | 12 min |
| NWS Sioux Falls, SD: severe thunderstorm warnings | 274 | 187 | 32% | 337 | 89% | 19 min |
| NWS Sioux Falls, SD: flash flood warnings | 36 | 26 | 28% | 54 | 91% | 61 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 7, 10:00 AM CST | Wind Advisory | FSD | 6 hr |
| Jan 8, 2:24 PM CST | Winter Weather Advisory | FSD | 64 hr |
| Jan 11, 3:14 PM CST | Wind Chill Advisory | FSD | 19 hr |
| Jan 16, 9:45 PM CST | Winter Weather Advisory | FSD | 6 hr |
| Jan 28, 9:09 AM CST | Dense Fog Advisory | FSD | 3 hr |
| Jan 29, 3:39 PM CST | Winter Weather Advisory | FSD | 3 days |
| Jan 31, 3:17 PM CST | Wind Chill Warning | FSD | 45 hr |
| Feb 2, 2:58 PM CST | Wind Chill Advisory | FSD | 15 hr |
| Feb 5, 10:26 AM CST | Freezing Rain Advisory | FSD | 106 min |
| Feb 7, 3:48 AM CST | Wind Chill Advisory | FSD | 32 hr |
| Feb 8, 2:37 PM CST | Wind Chill Advisory | FSD | 21 hr |
| Feb 12, 2:41 PM CST | Wind Advisory | FSD | 36 hr |
| Feb 16, 5:55 PM CST | Dense Fog Advisory | FSD | 16 hr |
| Feb 18, 4:18 AM CST | Winter Storm Watch | FSD | 35 hr |
| Feb 19, 4:07 AM CST | Winter Storm Warning | FSD | 41 hr |
| Feb 19, 11:25 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 20, 3:25 PM CST | Winter Weather Advisory | FSD | 12 hr |
| Mar 10, 3:56 AM CST | Dense Fog Advisory | FSD | 7 hr |
| Mar 11, 4:00 AM CST | Wind Advisory | FSD | 32 hr |
| Mar 15, 1:17 PM CDT | River Flood Watch | FSD | 6 days |
| Mar 16, 11:32 AM CDT | River Flood Warning | FSD | 12 days |
| Mar 16, 2:14 PM CDT | River Flood Warning | FSD | 4 days |
| Mar 18, 9:48 PM CDT | River Flood Warning | FSD | 13 hr |
| Mar 21, 10:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 3, 4:17 AM CDT | Wind Advisory | FSD | 36 hr |
| Apr 9, 5:48 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 16, 12:20 PM CDT | River Flood Warning | FSD | 9 days |
| Apr 29, 3:12 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 29, 9:11 PM CDT | Wind Advisory | FSD | 28 hr |
| May 1, 3:55 AM CDT | Wind Advisory | FSD | 13 hr |
| May 11, 5:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 11, 6:29 PM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| May 11, 6:49 PM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| May 15, 3:18 PM CDT | Frost Advisory | FSD | 17 hr |
| May 21, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 21, 7:05 PM CDT | Severe Thunderstorm Warning | FSD | 25 min |
| May 21, 7:28 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| May 24, 3:30 PM CDT | Wind Advisory | FSD | 27 hr |
| May 29, 3:54 PM CDT | Wind Advisory | FSD | 27 hr |
| May 29, 10:58 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 11:30 PM CDT | Severe Thunderstorm Warning | FSD | 45 min |
| May 29, 11:39 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| May 30, 12:14 AM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| May 30, 1:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 30, 2:08 PM CDT | Tornado Watch | SPC | 7 hr |
| May 30, 6:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 30, 8:43 PM CDT | Tornado Watch | SPC | 5 hr |
| May 31, 10:41 AM CDT | River Flood Warning | FSD | 24 hr |
| Jun 19, 3:40 AM CDT | Flash Flood Watch | FSD | 55 hr |
| Jun 20, 6:53 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 20, 8:07 PM CDT | Severe Thunderstorm Warning | FSD | 38 min |
| Jun 20, 8:33 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jun 20, 8:58 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Jun 20, 9:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 20, 9:39 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Jun 21, 11:40 AM CDT | River Flood Warning | FSD | 24 hr |
| Jun 26, 6:16 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 26, 6:55 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Jun 26, 8:58 PM CDT | High Wind Warning | FSD | 4 hr |
| Jun 29, 3:18 PM CDT | Heat Advisory | FSD | 28 hr |
| Jul 1, 12:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 1, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 1, 2:18 PM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 10, 1:03 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 10, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 15, 3:42 AM CDT | Excessive Heat Warning | FSD | 6 days |
| Jul 22, 3:01 PM CDT | Heat Advisory | FSD | 29 hr |
| Jul 25, 10:29 PM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| Jul 25, 10:54 PM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Jul 26, 8:17 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 30, 3:33 PM CDT | Heat Advisory | FSD | 52 hr |
| Aug 11, 6:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 11, 7:19 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 11, 8:01 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Aug 11, 9:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 23, 3:43 AM CDT | Heat Advisory | FSD | 11 hr |
| Aug 28, 5:16 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 6:58 AM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| Aug 28, 7:54 AM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Aug 28, 7:57 AM CDT | Severe Thunderstorm Warning | FSD | 33 min |
| Aug 28, 8:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 28, 8:24 AM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Sep 13, 3:12 PM CDT | Freeze Warning | FSD | 41 hr |
| Sep 19, 3:28 PM CDT | Wind Advisory | FSD | 34 hr |
| Oct 4, 3:13 PM CDT | Wind Advisory | FSD | 3 days |
| Oct 11, 9:58 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Nov 4, 3:37 AM CDT | Wind Advisory | FSD | 47 hr |
| Nov 15, 3:26 AM CST | Wind Advisory | FSD | 14 hr |
| Nov 19, 3:43 AM CST | Winter Weather Advisory | FSD | 14 hr |
| Nov 25, 4:30 AM CST | Wind Advisory | FSD | 41 hr |
| Dec 30, 3:15 PM CST | Wind Advisory | FSD | 57 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 | 19 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 14 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 6 |
| Flash Flood Watch | 1 |
| River Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 15 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.