Alert archive / South Carolina / Union County
Weather alerts in Union County, South Carolina, 2016
128 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Union County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 128
- Warnings
- 23
- Watches
- 14
- Advisories
- 20
- Busiest month
- July26 alerts
- Busiest day
- July 7, 20166 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 Union County in 2016 had a tornado report inside them.
Union County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 15 | 12 | 20% | 4 | 50% | 6 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 8 | 2 | 75% | 6 | 100% | 41 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 248 | 185 | 25% | 536 | 80% | 18 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 23 | 19 | 17% | 79 | 87% | 91 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 20, 3:52 PM EST | Winter Storm Watch | GSP | 13 hr |
| Jan 21, 4:34 AM EST | Winter Storm Warning | GSP | 65 hr |
| Jan 22, 6:38 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 2:07 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Feb 3, 4:11 AM EST | Flash Flood Watch | GSP | 11 hr |
| Feb 3, 10:52 AM EST | Areal Flood Advisory | GSP | 3 hr |
| Feb 3, 11:14 AM EST | Special Weather Statement | GSP | 46 min |
| Feb 3, 11:57 AM EST | Special Weather Statement | GSP | 48 min |
| Feb 14, 2:52 PM EST | Freezing Rain Advisory | GSP | 33 hr |
| Feb 16, 12:13 AM EST | Freezing Rain Advisory | GSP | 6 hr |
| Feb 23, 3:21 AM EST | Flash Flood Watch | GSP | 35 hr |
| Feb 23, 2:52 PM EST | High Wind Warning | GSP | 28 hr |
| Feb 23, 2:52 PM EST | Wind Advisory | GSP | 33 hr |
| Feb 24, 10:23 AM EST | Special Weather Statement | GSP | 52 min |
| Feb 24, 10:46 AM EST | Mesoscale Discussion | SPC | 119 min |
| Feb 24, 11:16 AM EST | Tornado Watch | SPC | 8 hr |
| Feb 24, 11:25 AM EST | Special Weather Statement | GSP | 65 min |
| Feb 24, 12:10 PM EST | Wind Advisory | GSP | 12 hr |
| Mar 14, 2:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Mar 14, 6:22 PM EDT | Severe Thunderstorm Warning | GSP | 38 min |
| Mar 14, 6:55 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Mar 14, 7:31 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Mar 14, 8:40 PM EDT | Severe Thunderstorm Warning | GSP | 65 min |
| Mar 20, 2:49 PM EDT | Freeze Watch | GSP | 24 hr |
| Mar 21, 3:42 AM EDT | Freeze Warning | GSP | 29 hr |
| Mar 26, 5:43 AM EDT | Dense Fog Advisory | GSP | 2 hr |
| Mar 31, 5:48 PM EDT | Special Weather Statement | GSP | 27 min |
| Apr 1, 1:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 7, 2:39 AM EDT | Special Weather Statement | GSP | 51 min |
| Apr 8, 3:59 AM EDT | Freeze Watch | GSP | 24 hr |
| Apr 9, 3:50 AM EDT | Freeze Warning | GSP | 30 hr |
| Apr 12, 6:29 PM EDT | Special Weather Statement | GSP | 31 min |
| May 1, 7:32 AM EDT | Special Weather Statement | GSP | 58 min |
| May 1, 8:31 AM EDT | Special Weather Statement | GSP | 59 min |
| May 1, 9:26 AM EDT | Areal Flood Advisory | GSP | 109 min |
| May 1, 11:09 AM EDT | Areal Flood Advisory | GSP | 111 min |
| May 1, 11:27 PM EDT | Special Weather Statement | GSP | 33 min |
| May 2, 12:04 AM EDT | Special Weather Statement | GSP | 26 min |
| May 2, 2:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 2, 2:49 PM EDT | Special Weather Statement | GSP | 26 min |
| May 3, 1:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 11, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 5:12 PM EDT | Special Weather Statement | GSP | 33 min |
| May 11, 5:34 PM EDT | Special Weather Statement | GSP | 26 min |
| May 21, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 5:11 PM EDT | Special Weather Statement | GSP | 49 min |
| Jun 3, 3:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 4:05 PM EDT | Special Weather Statement | GSP | 25 min |
| Jun 4, 7:10 PM EDT | Special Weather Statement | GSP | 35 min |
| Jun 4, 7:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Jun 5, 1:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 5, 3:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 6, 2:19 PM EDT | Flash Flood Watch | GSP | 8 hr |
| Jun 14, 1:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 14, 5:43 PM EDT | Special Weather Statement | GSP | 32 min |
| Jun 14, 6:16 PM EDT | Severe Thunderstorm Warning | GSP | 59 min |
| Jun 15, 1:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 17, 12:44 PM EDT | Severe Thunderstorm Warning | GSP | 31 min |
| Jun 17, 12:56 PM EDT | Special Weather Statement | GSP | 34 min |
| Jun 24, 1:01 AM EDT | Special Weather Statement | GSP | 44 min |
| Jun 24, 3:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 4:18 PM EDT | Special Weather Statement | GSP | 27 min |
| Jun 27, 4:58 PM EDT | Special Weather Statement | GSP | 32 min |
| Jun 30, 3:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 1:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 6, 3:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 7, 2:44 PM EDT | Special Weather Statement | GSP | 61 min |
| Jul 7, 3:03 PM EDT | Severe Thunderstorm Warning | GSP | 42 min |
| Jul 7, 6:06 PM EDT | Severe Thunderstorm Warning | GSP | 39 min |
| Jul 7, 6:43 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Jul 7, 7:10 PM EDT | Areal Flood Advisory | GSP | 110 min |
| Jul 7, 7:34 PM EDT | Special Weather Statement | GSP | 41 min |
| Jul 7, 8:25 PM EDT | Special Weather Statement | GSP | 35 min |
| Jul 7, 8:59 PM EDT | Severe Thunderstorm Warning | GSP | 46 min |
| Jul 8, 6:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 9:41 PM EDT | Special Weather Statement | GSP | 64 min |
| Jul 8, 10:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Jul 11, 1:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 11, 3:21 PM EDT | Special Weather Statement | GSP | 24 min |
| Jul 11, 3:48 PM EDT | Severe Thunderstorm Warning | GSP | 42 min |
| Jul 15, 5:29 PM EDT | Special Weather Statement | GSP | 16 min |
| Jul 15, 7:28 PM EDT | Special Weather Statement | GSP | 32 min |
| Jul 16, 4:13 PM EDT | Severe Thunderstorm Warning | GSP | 62 min |
| Jul 17, 6:22 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 23, 12:13 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:17 PM EDT | Special Weather Statement | GSP | 43 min |
| Jul 30, 2:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Jul 30, 6:38 PM EDT | Special Weather Statement | GSP | 52 min |
| Jul 30, 7:21 PM EDT | Special Weather Statement | GSP | 39 min |
| Aug 3, 3:19 PM EDT | Flash Flood Watch | GSP | 41 hr |
| Aug 7, 6:42 PM EDT | Special Weather Statement | GSP | 33 min |
| Aug 7, 7:15 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Aug 7, 8:11 PM EDT | Areal Flood Advisory | GSP | 109 min |
| Aug 7, 9:16 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Aug 10, 3:27 PM EDT | Special Weather Statement | GSP | 48 min |
| Aug 17, 1:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 18, 6:51 PM EDT | Special Weather Statement | GSP | 24 min |
| Aug 26, 5:36 PM EDT | Special Weather Statement | GSP | 24 min |
| Aug 27, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 27, 7:27 PM EDT | Special Weather Statement | GSP | 33 min |
| Sep 1, 12:23 PM EDT | Flash Flood Watch | GSP | 34 hr |
| Sep 2, 3:42 AM EDT | Wind Advisory | GSP | 19 hr |
| Sep 19, 6:28 PM EDT | Special Weather Statement | GSP | 32 min |
| Sep 19, 6:46 PM EDT | Special Weather Statement | GSP | 44 min |
| Sep 27, 4:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 27, 4:44 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Sep 27, 6:19 PM EDT | Special Weather Statement | GSP | 26 min |
| Sep 28, 7:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 28, 9:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Nov 2, 4:54 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Nov 11, 3:26 PM EST | Freeze Watch | GSP | 24 hr |
| Nov 12, 3:25 PM EST | Frost Advisory | GSP | 17 hr |
| Nov 18, 3:22 PM EST | Red Flag Warning | GSP | 33 hr |
| Nov 19, 3:40 AM EST | Freeze Warning | GSP | 29 hr |
| Nov 19, 3:40 AM EST | Wind Advisory | GSP | 51 hr |
| Nov 29, 11:31 AM EST | Special Weather Statement | GSP | 44 min |
| Nov 30, 2:55 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 30, 3:23 PM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Nov 30, 4:41 PM EST | Severe Thunderstorm Warning | GSP | 49 min |
| Nov 30, 5:26 PM EST | Severe Thunderstorm Warning | GSP | 49 min |
| Nov 30, 5:43 PM EST | Mesoscale Discussion | SPC | 92 min |
| Nov 30, 5:50 PM EST | Tornado Warning | GSP | 40 min |
| Dec 7, 2:44 AM EST | Dense Fog Advisory | GSP | 7 hr |
| Dec 13, 8:18 PM EST | Dense Fog Advisory | GSP | 15 hr |
| Dec 21, 3:39 AM EST | Freezing Fog Advisory | GSP | 5 hr |
| Dec 27, 2:22 AM EST | Dense Fog Advisory | GSP | 7 hr |
| Dec 29, 3:30 AM EST | Special Weather Statement | GSP | 45 min |
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 | 15 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 25 |
| Special Weather Statement | 46 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.