Alert archive / North Carolina / Union County
Weather alerts in Union County, North Carolina, 2024
151 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 151
- Warnings
- 25
- Watches
- 18
- Advisories
- 35
- Busiest month
- July37 alerts
- Busiest day
- May 15, 202410 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 2 tornado warnings covering Union County in 2024 had a tornado report inside them.
Union County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 18 | 12 | 33% | 11 | 91% | 29 min |
| Flash flood warnings | 3 | 2 | 33% | 2 | 50% | 457 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 17 | 7 | 59% | 18 | 50% | 9 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 289 | 209 | 28% | 588 | 82% | 24 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 116 | 54 | 53% | 144 | 90% | 138 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 8, 3:57 AM EST | Wind Advisory | GSP | 57 hr |
| Jan 8, 4:57 AM EST | Flood Watch | GSP | 37 hr |
| Jan 9, 11:41 AM EST | Tornado Watch | SPC | 6 hr |
| Jan 9, 12:56 PM EST | Mesoscale Discussion | SPC | 94 min |
| Jan 9, 1:32 PM EST | Severe Thunderstorm Warning | GSP | 73 min |
| Jan 9, 2:24 PM EST | Tornado Warning | GSP | 18 min |
| Jan 9, 2:45 PM EST | Severe Thunderstorm Warning | GSP | 64 min |
| Jan 9, 2:51 PM EST | Flash Flood Warning | GSP | 4 hr |
| Jan 9, 3:08 PM EST | Tornado Warning | GSP | 37 min |
| Jan 9, 6:46 PM EST | Areal Flood Advisory | GSP | 5 hr |
| Jan 11, 3:39 AM EST | Wind Advisory | GSP | 57 hr |
| Jan 27, 6:57 PM EST | Special Weather Statement | GSP | 18 min |
| Jan 27, 7:44 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 11, 10:53 AM EST | Flood Watch | GSP | 33 hr |
| Feb 12, 4:24 AM EST | Wind Advisory | GSP | 32 hr |
| Feb 28, 4:52 PM EST | Severe Thunderstorm Warning | GSP | 38 min |
| Mar 3, 3:31 AM EST | Dense Fog Advisory | GSP | 7 hr |
| Mar 7, 3:34 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Mar 17, 3:19 AM EDT | Freeze Watch | GSP | 24 hr |
| Mar 18, 3:21 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 24, 3:15 AM EDT | Frost Advisory | GSP | 30 hr |
| Apr 5, 3:25 AM EDT | Frost Advisory | GSP | 29 hr |
| Apr 6, 3:30 AM EDT | Frost Advisory | GSP | 30 hr |
| Apr 11, 2:50 PM EDT | Wind Advisory | GSP | 48 hr |
| Apr 11, 6:43 PM EDT | Tornado Watch | SPC | 4 hr |
| Apr 11, 7:42 PM EDT | Special Weather Statement | GSP | 33 min |
| Apr 19, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 20, 2:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 4:43 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Apr 20, 4:59 PM EDT | Special Weather Statement | GSP | 31 min |
| May 4, 9:37 AM EDT | Areal Flood Advisory | GSP | 3 hr |
| May 7, 5:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 8, 1:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 8, 3:07 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 8, 3:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 8, 4:16 PM EDT | Severe Thunderstorm Warning | GSP | 59 min |
| May 8, 4:43 PM EDT | Severe Thunderstorm Warning | GSP | 62 min |
| May 9, 2:35 AM EDT | Special Weather Statement | GSP | 25 min |
| May 10, 1:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 10, 2:00 PM EDT | Special Weather Statement | GSP | 30 min |
| May 10, 2:04 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| May 10, 5:53 PM EDT | Special Weather Statement | GSP | 37 min |
| May 10, 6:28 PM EDT | Special Weather Statement | GSP | 17 min |
| May 15, 12:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 15, 2:14 PM EDT | Special Weather Statement | GSP | 31 min |
| May 15, 2:44 PM EDT | Special Weather Statement | GSP | 46 min |
| May 15, 3:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 4:01 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| May 15, 4:18 PM EDT | Special Weather Statement | CAE | 42 min |
| May 15, 4:47 PM EDT | Severe Thunderstorm Warning | GSP | 58 min |
| May 15, 5:14 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| May 15, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 16, 3:18 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| May 18, 4:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 23, 9:45 PM EDT | Special Weather Statement | GSP | 45 min |
| May 26, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 26, 8:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 27, 6:13 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 3:54 PM EDT | Special Weather Statement | GSP | 36 min |
| Jun 4, 6:54 PM EDT | Special Weather Statement | GSP | 36 min |
| Jun 4, 7:23 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Jun 5, 4:13 PM EDT | Special Weather Statement | GSP | 32 min |
| Jun 5, 4:44 PM EDT | Special Weather Statement | GSP | 16 min |
| Jun 6, 4:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 9, 7:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 29, 2:18 PM EDT | Heat Advisory | GSP | 28 hr |
| Jun 30, 2:05 PM EDT | Special Weather Statement | GSP | 25 min |
| Jun 30, 5:04 PM EDT | Special Weather Statement | GSP | 26 min |
| Jun 30, 5:27 PM EDT | Severe Thunderstorm Warning | GSP | 38 min |
| Jul 4, 1:52 PM EDT | Heat Advisory | GSP | 30 hr |
| Jul 6, 2:46 AM EDT | Heat Advisory | GSP | 15 hr |
| Jul 6, 2:30 PM EDT | Special Weather Statement | GSP | 45 min |
| Jul 6, 3:20 PM EDT | Special Weather Statement | GSP | 40 min |
| Jul 6, 4:19 PM EDT | Special Weather Statement | GSP | 26 min |
| Jul 6, 4:44 PM EDT | Special Weather Statement | GSP | 46 min |
| Jul 6, 4:53 PM EDT | Severe Thunderstorm Warning | GSP | 37 min |
| Jul 6, 5:29 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Jul 6, 6:21 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Jul 9, 2:40 AM EDT | Heat Advisory | GSP | 17 hr |
| Jul 12, 4:46 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Jul 14, 3:49 PM EDT | Special Weather Statement | GSP | 41 min |
| Jul 15, 3:35 AM EDT | Heat Advisory | GSP | 16 hr |
| Jul 15, 2:30 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 15, 2:53 PM EDT | Special Weather Statement | GSP | 37 min |
| Jul 15, 3:19 PM EDT | Special Weather Statement | GSP | 26 min |
| Jul 15, 3:25 PM EDT | Severe Thunderstorm Warning | GSP | 25 min |
| Jul 15, 9:33 PM EDT | Special Weather Statement | CAE | 42 min |
| Jul 16, 2:47 AM EDT | Heat Advisory | GSP | 17 hr |
| Jul 18, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 4:54 PM EDT | Special Weather Statement | GSP | 36 min |
| Jul 18, 5:15 PM EDT | Severe Thunderstorm Warning | GSP | 60 min |
| Jul 18, 5:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 18, 5:36 PM EDT | Special Weather Statement | GSP | 24 min |
| Jul 21, 8:39 PM EDT | Special Weather Statement | CAE | 36 min |
| Jul 21, 9:12 PM EDT | Special Weather Statement | GSP | 33 min |
| Jul 23, 3:10 PM EDT | Severe Thunderstorm Warning | GSP | 35 min |
| Jul 23, 3:41 PM EDT | Special Weather Statement | GSP | 34 min |
| Jul 23, 3:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 4:05 PM EDT | Special Weather Statement | GSP | 25 min |
| Jul 23, 4:33 PM EDT | Special Weather Statement | GSP | 27 min |
| Jul 26, 10:15 AM EDT | Areal Flood Advisory | GSP | 3 hr |
| Jul 29, 3:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 4:36 PM EDT | Special Weather Statement | GSP | 39 min |
| Jul 30, 8:49 PM EDT | Severe Thunderstorm Warning | GSP | 56 min |
| Jul 30, 9:02 PM EDT | Special Weather Statement | CAE | 43 min |
| Jul 30, 9:41 PM EDT | Special Weather Statement | GSP | 49 min |
| Aug 1, 2:53 AM EDT | Heat Advisory | GSP | 16 hr |
| Aug 2, 3:35 AM EDT | Heat Advisory | GSP | 15 hr |
| Aug 3, 1:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 3, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 3, 2:50 PM EDT | Special Weather Statement | GSP | 25 min |
| Aug 3, 5:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 6, 3:38 PM EDT | Flood Watch | GSP | 59 hr |
| Aug 8, 3:41 AM EDT | Special Weather Statement | GSP | 64 min |
| Aug 8, 3:47 AM EDT | Special Weather Statement | CAE | 43 min |
| Aug 8, 4:23 AM EDT | Flash Flood Warning | GSP | 12 hr |
| Aug 8, 6:11 AM EDT | Wind Advisory | GSP | 9 hr |
| Aug 8, 8:21 AM EDT | Special Weather Statement | CAE | 39 min |
| Aug 8, 4:01 PM EDT | Areal Flood Advisory | GSP | 6 hr |
| Aug 10, 9:40 PM EDT | Special Weather Statement | GSP | 35 min |
| Aug 11, 3:57 PM EDT | Special Weather Statement | GSP | 33 min |
| Aug 11, 4:01 PM EDT | Severe Thunderstorm Warning | GSP | 59 min |
| Aug 11, 5:49 PM EDT | Special Weather Statement | CAE | 41 min |
| Aug 12, 3:15 AM EDT | Special Weather Statement | GSP | 30 min |
| Aug 18, 2:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 3:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 19, 6:37 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| Aug 30, 7:57 PM EDT | Special Weather Statement | GSP | 48 min |
| Aug 30, 8:42 PM EDT | Special Weather Statement | GSP | 48 min |
| Sep 1, 6:48 PM EDT | Special Weather Statement | GSP | 57 min |
| Sep 16, 9:37 AM EDT | Wind Advisory | GSP | 16 hr |
| Sep 16, 11:25 AM EDT | Flood Watch | GSP | 21 hr |
| Sep 16, 8:26 PM EDT | Areal Flood Advisory | GSP | 12 hr |
| Sep 24, 3:22 PM EDT | Flood Watch | GSP | 71 hr |
| Sep 25, 5:06 PM EDT | Tropical Storm Warning | GSP | 45 hr |
| Sep 26, 11:32 AM EDT | Wind Advisory | GSP | 40 hr |
| Sep 26, 8:56 PM EDT | Tornado Watch | SPC | 11 hr |
| Sep 27, 5:17 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 27, 5:57 AM EDT | Flash Flood Warning | GSP | 8 hr |
| Sep 27, 8:02 AM EDT | Tornado Watch | SPC | 12 hr |
| Oct 16, 3:23 AM EDT | Frost Advisory | GSP | 31 hr |
| Oct 17, 1:58 PM EDT | Frost Advisory | GSP | 19 hr |
| Nov 8, 1:16 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Dec 11, 5:48 AM EST | Special Weather Statement | GSP | 27 min |
| Dec 11, 8:17 AM EST | Special Weather Statement | GSP | 43 min |
| Dec 18, 3:12 AM EST | Dense Fog Advisory | GSP | 7 hr |
| Dec 29, 6:02 AM EST | Tornado Watch | SPC | 7 hr |
| Dec 29, 8:32 AM EST | Mesoscale Discussion | SPC | 88 min |
| Dec 29, 8:59 AM EST | Severe Thunderstorm Warning | GSP | 76 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 | 18 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 49 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 5 |
| Areal Flood Advisory | 10 |
| Heat | |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.