Alert archive / North Carolina / Union County
Weather alerts in Union County, North Carolina, 2023
124 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 124
- Warnings
- 21
- Watches
- 14
- Advisories
- 23
- Busiest month
- July28 alerts
- Busiest day
- July 23, 20238 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Union County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 8 | 27% | 9 | 89% | 21 min |
| Flash flood warnings | 3 | 1 | 67% | 2 | 50% | 41 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 14 | 3 | 79% | 11 | 27% | 2 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 392 | 296 | 24% | 895 | 86% | 21 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 20 | 10 | 50% | 28 | 93% | 93 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 1, 9:38 PM EST | Dense Fog Advisory | GSP | 12 hr |
| Jan 4, 9:35 AM EST | Special Weather Statement | GSP | 25 min |
| Jan 9, 3:32 AM EST | Dense Fog Advisory | GSP | 6 hr |
| Jan 12, 4:16 PM EST | Mesoscale Discussion | SPC | 59 min |
| Jan 12, 4:41 PM EST | Tornado Watch | SPC | 3 hr |
| Jan 12, 5:54 PM EST | Mesoscale Discussion | SPC | 96 min |
| Jan 12, 6:59 PM EST | Severe Thunderstorm Warning | GSP | 61 min |
| Jan 25, 11:23 AM EST | Special Weather Statement | GSP | 37 min |
| Jan 31, 12:58 AM EST | Dense Fog Advisory | GSP | 9 hr |
| Feb 27, 1:24 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Mar 2, 2:52 PM EST | Wind Advisory | GSP | 43 hr |
| Mar 3, 8:45 PM EST | Special Weather Statement | GSP | 45 min |
| Mar 12, 3:24 PM EDT | Freeze Watch | GSP | 12 hr |
| Mar 13, 3:04 AM EDT | Freeze Watch | GSP | 24 hr |
| Mar 13, 3:04 AM EDT | Freeze Warning | GSP | 32 hr |
| Mar 14, 3:25 AM EDT | Freeze Warning | GSP | 31 hr |
| Mar 14, 2:31 PM EDT | Freeze Watch | GSP | 12 hr |
| Mar 15, 2:59 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 18, 3:30 AM EDT | Freeze Watch | GSP | 11 hr |
| Mar 18, 3:30 AM EDT | Freeze Warning | GSP | 32 hr |
| Mar 18, 2:33 PM EDT | Freeze Warning | GSP | 43 hr |
| Mar 19, 3:30 AM EDT | Freeze Watch | GSP | 35 hr |
| Mar 20, 10:04 AM EDT | Freeze Warning | GSP | 24 hr |
| Mar 23, 3:51 AM EDT | Dense Fog Advisory | GSP | 7 hr |
| Mar 27, 12:48 AM EDT | Special Weather Statement | GSP | 27 min |
| Mar 27, 2:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 12:05 PM EDT | Wind Advisory | GSP | 36 hr |
| Apr 6, 3:40 PM EDT | Severe Thunderstorm Warning | GSP | 35 min |
| Apr 9, 2:32 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 10, 9:54 AM EDT | Frost Advisory | GSP | 23 hr |
| May 2, 3:19 AM EDT | Wind Advisory | GSP | 24 hr |
| May 16, 10:44 PM EDT | Special Weather Statement | GSP | 31 min |
| May 16, 11:21 PM EDT | Special Weather Statement | GSP | 24 min |
| May 16, 11:57 PM EDT | Special Weather Statement | GSP | 33 min |
| Jun 12, 1:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 12, 3:52 PM EDT | Special Weather Statement | GSP | 23 min |
| Jun 19, 2:49 PM EDT | Flood Watch | GSP | 3 days |
| Jun 22, 9:12 PM EDT | Areal Flood Advisory | GSP | 108 min |
| Jun 26, 12:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 4:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 7:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 9:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 2:42 PM EDT | Heat Advisory | GSP | 29 hr |
| Jul 1, 7:48 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 1, 8:20 PM EDT | Special Weather Statement | GSP | 40 min |
| Jul 2, 2:36 PM EDT | Heat Advisory | GSP | 29 hr |
| Jul 2, 5:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 3, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 5, 7:28 PM EDT | Special Weather Statement | GSP | 32 min |
| Jul 7, 5:00 PM EDT | Special Weather Statement | GSP | 45 min |
| Jul 7, 5:15 PM EDT | Special Weather Statement | CAE | 30 min |
| Jul 8, 2:03 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 8, 2:40 PM EDT | Special Weather Statement | GSP | 35 min |
| Jul 8, 3:15 PM EDT | Special Weather Statement | GSP | 15 min |
| Jul 9, 11:23 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 9, 12:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 9, 1:26 PM EDT | Special Weather Statement | GSP | 49 min |
| Jul 14, 1:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 14, 4:52 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 23, 12:21 PM EDT | Special Weather Statement | GSP | 24 min |
| Jul 23, 12:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 12:47 PM EDT | Special Weather Statement | GSP | 28 min |
| Jul 23, 1:02 PM EDT | Severe Thunderstorm Warning | GSP | 48 min |
| Jul 23, 2:48 PM EDT | Special Weather Statement | GSP | 27 min |
| Jul 23, 2:53 PM EDT | Special Weather Statement | CAE | 37 min |
| Jul 23, 3:15 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 23, 3:45 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 29, 9:00 PM EDT | Special Weather Statement | GSP | 45 min |
| Jul 30, 4:02 PM EDT | Special Weather Statement | GSP | 28 min |
| Jul 30, 4:31 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Aug 6, 3:17 PM EDT | Heat Advisory | GSP | 27 hr |
| Aug 7, 1:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 7, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 7, 5:38 PM EDT | Severe Thunderstorm Warning | GSP | 52 min |
| Aug 7, 5:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 7, 6:16 PM EDT | Severe Thunderstorm Warning | GSP | 38 min |
| Aug 10, 9:24 AM EDT | Special Weather Statement | GSP | 21 min |
| Aug 13, 3:51 AM EDT | Heat Advisory | GSP | 16 hr |
| Aug 13, 2:51 PM EDT | Heat Advisory | GSP | 29 hr |
| Aug 14, 4:33 PM EDT | Heat Advisory | GSP | 25 hr |
| Aug 15, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 15, 3:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 15, 4:50 PM EDT | Special Weather Statement | GSP | 25 min |
| Aug 15, 5:03 PM EDT | Severe Thunderstorm Warning | GSP | 27 min |
| Aug 24, 10:01 PM EDT | Special Weather Statement | GSP | 29 min |
| Aug 24, 10:31 PM EDT | Special Weather Statement | GSP | 29 min |
| Aug 26, 3:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 3:29 PM EDT | Special Weather Statement | GSP | 31 min |
| Aug 26, 10:53 PM EDT | Special Weather Statement | GSP | 22 min |
| Aug 26, 10:55 PM EDT | Special Weather Statement | CAE | 35 min |
| Aug 26, 11:18 PM EDT | Special Weather Statement | GSP | 12 min |
| Aug 26, 11:46 PM EDT | Special Weather Statement | GSP | 29 min |
| Aug 27, 6:11 PM EDT | Severe Thunderstorm Warning | GSP | 49 min |
| Aug 27, 6:16 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Aug 27, 8:34 PM EDT | Areal Flood Advisory | GSP | 5 hr |
| Aug 27, 9:09 PM EDT | Areal Flood Advisory | GSP | 4 hr |
| Aug 29, 3:03 PM EDT | Flood Watch | GSP | 30 hr |
| Sep 7, 2:25 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 7, 6:47 PM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| Sep 7, 7:28 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Sep 7, 7:46 PM EDT | Flash Flood Warning | GSP | 2 hr |
| Sep 7, 8:15 PM EDT | Special Weather Statement | GSP | 30 min |
| Sep 9, 3:22 AM EDT | Flood Watch | GSP | 23 hr |
| Sep 9, 8:37 PM EDT | Special Weather Statement | GSP | 23 min |
| Sep 9, 8:48 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Sep 9, 9:04 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Sep 9, 9:38 PM EDT | Areal Flood Advisory | GSP | 113 min |
| Sep 9, 10:15 PM EDT | Flash Flood Warning | GSP | 5 hr |
| Sep 10, 3:12 AM EDT | Areal Flood Advisory | GSP | 3 hr |
| Sep 12, 2:20 PM EDT | Special Weather Statement | CAE | 25 min |
| Sep 12, 2:23 PM EDT | Special Weather Statement | GSP | 22 min |
| Sep 12, 2:48 PM EDT | Special Weather Statement | GSP | 27 min |
| Sep 12, 2:50 PM EDT | Special Weather Statement | CAE | 25 min |
| Sep 12, 2:55 PM EDT | Special Weather Statement | GSP | 35 min |
| Sep 12, 3:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 3:53 PM EDT | Special Weather Statement | GSP | 37 min |
| Oct 20, 2:45 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 20, 4:16 PM EDT | Special Weather Statement | CAE | 44 min |
| Oct 20, 4:37 PM EDT | Special Weather Statement | GSP | 53 min |
| Oct 31, 3:50 AM EDT | Freeze Watch | GSP | 26 hr |
| Nov 1, 5:45 AM EDT | Freeze Warning | GSP | 28 hr |
| Nov 21, 9:23 PM EST | Special Weather Statement | CAE | 37 min |
| Nov 21, 9:25 PM EST | Special Weather Statement | CAE | 35 min |
| Dec 26, 6:39 PM EST | Areal Flood Advisory | GSP | 8 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 | 11 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 47 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 3 |
| Areal Flood Advisory | 7 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 6 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| 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 archive20222024
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.