Alert archive / South Dakota / Sully County
Weather alerts in Sully County, South Dakota, 2010
142 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sully County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 142
- Warnings
- 31
- Watches
- 27
- Advisories
- 48
- Busiest month
- May31 alerts
- Busiest day
- May 24, 201010 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 1 tornado warnings covering Sully County in 2010 had a tornado report inside them.
Sully County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 14 | 26% | 2 | 100% | 36 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 18 | 9 | 50% | 24 | 79% | 19 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 214 | 143 | 33% | 296 | 80% | 20 min |
| NWS Aberdeen, SD: flash flood warnings | 18 | 10 | 44% | 16 | 81% | 111 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 1, 3:04 PM CST | Wind Chill Advisory | ABR | 20 hr |
| Jan 5, 3:36 AM CST | Winter Weather Advisory | ABR | 31 hr |
| Jan 6, 10:35 AM CST | Blizzard Warning | ABR | 20 hr |
| Jan 6, 3:11 PM CST | Wind Chill Warning | ABR | 45 hr |
| Jan 17, 11:44 PM CST | Dense Fog Advisory | ABR | 12 hr |
| Jan 20, 4:04 AM CST | Winter Weather Advisory | ABR | 17 hr |
| Jan 20, 3:09 PM CST | Winter Storm Watch | ABR | 37 hr |
| Jan 20, 6:33 PM CST | Dense Fog Advisory | ABR | 17 hr |
| Jan 21, 5:27 PM CST | Dense Fog Advisory | ABR | 10 hr |
| Jan 22, 4:15 AM CST | Winter Storm Warning | ABR | 26 hr |
| Jan 23, 3:30 AM CST | Winter Weather Advisory | ABR | 9 hr |
| Jan 24, 3:06 AM CST | Wind Advisory | ABR | 36 hr |
| Jan 24, 11:31 AM CST | Winter Weather Advisory | ABR | 34 hr |
| Feb 3, 2:52 PM CST | Winter Weather Advisory | ABR | 48 hr |
| Feb 7, 3:58 AM CST | Winter Weather Advisory | ABR | 48 hr |
| Feb 12, 3:08 PM CST | Winter Weather Advisory | ABR | 45 hr |
| Feb 26, 10:59 PM CST | Dense Fog Advisory | ABR | 11 hr |
| Feb 27, 9:30 PM CST | Dense Fog Advisory | ABR | 15 hr |
| Mar 2, 7:16 PM CST | Dense Fog Advisory | ABR | 40 hr |
| Mar 4, 7:13 PM CST | Dense Fog Advisory | ABR | 20 hr |
| Mar 5, 7:41 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 5, 8:06 PM CST | Freezing Rain Advisory | ABR | 16 hr |
| Mar 8, 8:36 PM CST | Dense Fog Advisory | ABR | 7 hr |
| Mar 9, 2:44 PM CST | Winter Weather Advisory | ABR | 42 hr |
| Mar 11, 4:20 AM CST | Winter Weather Advisory | ABR | 16 hr |
| Mar 13, 12:34 PM CST | Dense Fog Advisory | ABR | 21 hr |
| Apr 12, 7:46 PM CDT | Wind Advisory | ABR | 26 hr |
| Apr 13, 12:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 13, 3:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 13, 5:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 27, 3:15 PM CDT | Wind Advisory | ABR | 28 hr |
| Apr 28, 3:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 1, 2:52 AM CDT | Wind Advisory | ABR | 16 hr |
| May 3, 4:20 AM CDT | High Wind Watch | ABR | 15 hr |
| May 3, 7:21 PM CDT | High Wind Warning | ABR | 29 hr |
| May 3, 7:30 PM CDT | Wind Advisory | ABR | 44 hr |
| May 7, 3:42 AM CDT | Freeze Watch | ABR | 12 hr |
| May 7, 3:26 PM CDT | Freeze Warning | ABR | 17 hr |
| May 22, 1:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 22, 5:10 PM CDT | Tornado Watch | SPC | 8 hr |
| May 22, 7:32 PM CDT | Severe Thunderstorm Warning | ABR | 58 min |
| May 22, 7:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 22, 7:54 PM CDT | Tornado Warning | ABR | 51 min |
| May 22, 8:48 PM CDT | Severe Thunderstorm Warning | ABR | 27 min |
| May 23, 2:50 PM CDT | Flash Flood Watch | ABR | 30 hr |
| May 23, 2:55 PM CDT | Wind Advisory | ABR | 30 hr |
| May 23, 10:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 23, 11:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 24, 1:18 AM CDT | Severe Thunderstorm Warning | ABR | 42 min |
| May 24, 6:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| May 24, 11:55 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 24, 12:21 PM CDT | Tornado Watch | SPC | 9 hr |
| May 24, 3:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 24, 4:52 PM CDT | Severe Thunderstorm Warning | ABR | 38 min |
| May 24, 6:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 24, 6:45 PM CDT | Severe Thunderstorm Warning | ABR | 60 min |
| May 24, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 24, 7:39 PM CDT | Severe Thunderstorm Warning | ABR | 66 min |
| May 27, 3:29 AM CDT | Wind Advisory | ABR | 16 hr |
| May 29, 3:43 AM CDT | Flash Flood Watch | ABR | 24 hr |
| May 29, 3:56 AM CDT | Wind Advisory | ABR | 8 hr |
| May 29, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 29, 7:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 3, 3:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 7:21 PM CDT | Mesoscale Discussion | SPC | 24 min |
| Jun 10, 7:27 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 10, 7:46 PM CDT | Severe Thunderstorm Warning | ABR | 44 min |
| Jun 10, 7:52 PM CDT | Severe Thunderstorm Warning | ABR | 23 min |
| Jun 16, 3:43 PM CDT | Wind Advisory | ABR | 29 hr |
| Jun 16, 10:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 16, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 2:05 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 20, 7:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 1:36 AM CDT | Mesoscale Discussion | SPC | 24 min |
| Jun 22, 2:13 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 22, 7:56 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 22, 9:29 PM CDT | Severe Thunderstorm Warning | ABR | 28 min |
| Jun 22, 10:35 PM CDT | Flash Flood Warning | ABR | 6 hr |
| Jun 26, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 5:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 26, 8:50 PM CDT | Flash Flood Warning | ABR | 75 min |
| Jun 26, 8:56 PM CDT | Severe Thunderstorm Warning | ABR | 49 min |
| Jul 3, 5:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 3, 6:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 5:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 6, 6:01 PM CDT | Flash Flood Watch | ABR | 10 hr |
| Jul 6, 8:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 10, 1:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 10, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 5:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 19, 7:12 PM CDT | Severe Thunderstorm Warning | ABR | 33 min |
| Jul 21, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 21, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 4:23 PM CDT | Severe Thunderstorm Warning | ABR | 37 min |
| Jul 21, 5:01 PM CDT | Severe Thunderstorm Warning | ABR | 29 min |
| Jul 23, 12:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 23, 3:43 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 31, 4:13 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 31, 5:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 6:46 PM CDT | Severe Thunderstorm Warning | ABR | 59 min |
| Jul 31, 7:44 PM CDT | Severe Thunderstorm Warning | ABR | 61 min |
| Jul 31, 10:29 PM CDT | Mesoscale Discussion | SPC | 31 min |
| Aug 1, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 3, 3:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 3, 5:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 10:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 30, 2:45 PM CDT | Mesoscale Discussion | SPC | 30 min |
| Sep 1, 6:25 PM CDT | Severe Thunderstorm Warning | ABR | 27 min |
| Sep 2, 2:01 AM CDT | Wind Advisory | ABR | 17 hr |
| Sep 5, 2:44 PM CDT | Wind Advisory | ABR | 40 hr |
| Sep 14, 9:54 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 14, 10:19 PM CDT | Severe Thunderstorm Warning | ABR | 41 min |
| Sep 14, 11:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Sep 15, 4:00 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Sep 15, 8:21 AM CDT | Severe Thunderstorm Warning | ABR | 21 min |
| Oct 1, 3:05 PM CDT | Frost Advisory | ABR | 18 hr |
| Oct 8, 8:51 PM CDT | Severe Thunderstorm Warning | ABR | 24 min |
| Oct 9, 2:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 24, 3:45 PM CDT | High Wind Watch | ABR | 23 hr |
| Oct 25, 2:30 PM CDT | High Wind Warning | ABR | 52 hr |
| Oct 25, 2:30 PM CDT | Wind Advisory | ABR | 17 hr |
| Oct 26, 3:46 PM CDT | Winter Weather Advisory | ABR | 27 hr |
| Oct 27, 6:52 PM CDT | Wind Advisory | ABR | 5 hr |
| Nov 3, 3:25 AM CDT | Wind Advisory | ABR | 16 hr |
| Nov 21, 2:41 PM CST | Winter Weather Advisory | ABR | 22 hr |
| Nov 22, 1:56 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Nov 23, 2:29 PM CST | Winter Weather Advisory | ABR | 31 hr |
| Nov 24, 2:47 PM CST | Wind Chill Advisory | ABR | 21 hr |
| Nov 28, 3:43 PM CST | Winter Weather Advisory | ABR | 28 hr |
| Dec 6, 4:01 AM CST | Dense Fog Advisory | ABR | 5 hr |
| Dec 7, 3:14 AM CST | Dense Fog Advisory | ABR | 7 hr |
| Dec 10, 2:04 PM CST | Wind Advisory | ABR | 13 hr |
| Dec 19, 3:17 PM CST | Winter Weather Advisory | ABR | 21 hr |
| Dec 20, 11:59 AM CST | Winter Weather Advisory | ABR | 4 hr |
| Dec 22, 2:19 PM CST | Winter Weather Advisory | ABR | 38 hr |
| Dec 29, 4:11 AM CST | Winter Storm Watch | ABR | 11 hr |
| Dec 29, 3:06 PM CST | Winter Storm Warning | ABR | 36 hr |
| Dec 29, 3:06 PM CST | Winter Weather Advisory | ABR | 21 hr |
| Dec 30, 12:31 PM CST | Blizzard Warning | ABR | 15 hr |
| Dec 30, 9:58 PM CST | Winter Weather Advisory | ABR | 11 hr |
| Dec 31, 3:06 AM CST | Blizzard Warning | ABR | 33 hr |
| Dec 31, 11:22 AM CST | Mesoscale Discussion | SPC | 5 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 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 36 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 3 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 18 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill 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 | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.