Alert archive / North Carolina / Union County
Weather alerts in Union County, North Carolina, 2018
176 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 176
- Warnings
- 23
- Watches
- 16
- Advisories
- 29
- Busiest month
- September24 alerts
- Busiest day
- September 16, 201811 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 14 | 0% | 12 | 92% | 20 min |
| Flash flood warnings | 3 | 2 | 33% | 6 | 100% | 254 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 7 | 1 | 86% | 3 | 67% | 5 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 347 | 244 | 30% | 600 | 87% | 20 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 74 | 53 | 28% | 177 | 83% | 159 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 3, 9:38 AM EST | Winter Weather Advisory | GSP | 8 hr |
| Jan 12, 11:40 AM EST | Special Weather Statement | GSP | 50 min |
| Jan 12, 3:38 PM EST | Special Weather Statement | GSP | 37 min |
| Jan 12, 5:29 PM EST | Special Weather Statement | GSP | 46 min |
| Jan 15, 3:32 PM EST | Winter Weather Advisory | GSP | 4 days |
| Jan 16, 3:03 PM EST | Winter Storm Warning | GSP | 27 hr |
| Jan 17, 7:21 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 18, 1:42 PM EST | Winter Weather Advisory | GSP | 22 hr |
| Jan 23, 1:29 AM EST | Special Weather Statement | GSP | 46 min |
| Jan 23, 1:50 AM EST | Special Weather Statement | GSP | 25 min |
| Jan 23, 2:12 AM EST | Special Weather Statement | GSP | 33 min |
| Feb 4, 11:44 PM EST | Dense Fog Advisory | GSP | 9 hr |
| Feb 7, 12:49 PM EST | Special Weather Statement | GSP | 41 min |
| Feb 16, 5:11 PM EST | Special Weather Statement | GSP | 79 min |
| Feb 18, 3:52 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Feb 19, 10:44 PM EST | Dense Fog Advisory | GSP | 13 hr |
| Mar 1, 2:05 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 1, 2:53 PM EST | Wind Advisory | GSP | 29 hr |
| Mar 1, 2:56 PM EST | Special Weather Statement | GSP | 34 min |
| Mar 1, 3:31 PM EST | Special Weather Statement | GSP | 29 min |
| Mar 13, 3:27 AM EDT | Winter Weather Advisory | GSP | 33 hr |
| Mar 20, 5:32 AM EDT | Dense Fog Advisory | GSP | 4 hr |
| Mar 20, 7:58 PM EDT | Special Weather Statement | GSP | 32 min |
| Mar 20, 8:27 PM EDT | Special Weather Statement | GSP | 33 min |
| Apr 15, 3:43 AM EDT | Flash Flood Watch | GSP | 16 hr |
| Apr 15, 11:15 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 12:13 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 15, 3:15 PM EDT | Severe Thunderstorm Warning | GSP | 30 min |
| Apr 15, 3:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 15, 3:41 PM EDT | Severe Thunderstorm Warning | GSP | 34 min |
| Apr 15, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 16, 2:35 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 27, 3:57 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| May 10, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 10, 7:20 PM EDT | Special Weather Statement | GSP | 25 min |
| May 10, 7:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 10, 7:42 PM EDT | Special Weather Statement | GSP | 33 min |
| May 10, 7:49 PM EDT | Severe Thunderstorm Warning | GSP | 26 min |
| May 16, 5:19 PM EDT | Special Weather Statement | GSP | 56 min |
| May 16, 6:35 PM EDT | Special Weather Statement | GSP | 40 min |
| May 21, 6:51 PM EDT | Special Weather Statement | GSP | 39 min |
| May 21, 8:04 PM EDT | Special Weather Statement | GSP | 41 min |
| May 21, 8:53 PM EDT | Special Weather Statement | GSP | 52 min |
| May 21, 9:38 PM EDT | Special Weather Statement | GSP | 52 min |
| May 21, 10:17 PM EDT | Areal Flood Advisory | GSP | 118 min |
| May 23, 3:51 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 5:32 PM EDT | Special Weather Statement | GSP | 28 min |
| May 23, 6:15 PM EDT | Special Weather Statement | GSP | 30 min |
| May 23, 6:21 PM EDT | Special Weather Statement | GSP | 24 min |
| May 27, 4:44 AM EDT | Flash Flood Watch | GSP | 5 days |
| May 29, 2:58 PM EDT | Special Weather Statement | GSP | 47 min |
| May 30, 6:48 PM EDT | Special Weather Statement | GSP | 27 min |
| May 31, 6:15 PM EDT | Special Weather Statement | CAE | 45 min |
| May 31, 7:00 PM EDT | Special Weather Statement | GSP | 60 min |
| May 31, 7:04 PM EDT | Special Weather Statement | CAE | 41 min |
| Jun 1, 8:17 PM EDT | Severe Thunderstorm Warning | GSP | 58 min |
| Jun 1, 8:54 PM EDT | Severe Thunderstorm Warning | GSP | 33 min |
| Jun 1, 9:30 PM EDT | Special Weather Statement | GSP | 60 min |
| Jun 2, 2:54 PM EDT | Special Weather Statement | GSP | 36 min |
| Jun 2, 3:24 PM EDT | Special Weather Statement | CAE | 66 min |
| Jun 2, 3:28 PM EDT | Special Weather Statement | GSP | 32 min |
| Jun 2, 4:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Jun 3, 8:22 PM EDT | Special Weather Statement | CAE | 23 min |
| Jun 20, 5:59 PM EDT | Special Weather Statement | GSP | 46 min |
| Jun 20, 6:15 PM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Jun 20, 7:01 PM EDT | Special Weather Statement | GSP | 44 min |
| Jun 20, 7:12 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Jun 22, 10:24 PM EDT | Special Weather Statement | GSP | 66 min |
| Jun 24, 5:15 PM EDT | Special Weather Statement | GSP | 60 min |
| Jun 25, 12:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 25, 1:02 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 25, 6:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 7:21 PM EDT | Severe Thunderstorm Warning | GSP | 39 min |
| Jun 25, 7:59 PM EDT | Severe Thunderstorm Warning | GSP | 46 min |
| Jun 27, 2:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 4, 7:48 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 6, 3:55 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Jul 6, 4:41 PM EDT | Severe Thunderstorm Warning | GSP | 64 min |
| Jul 12, 1:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 12, 6:06 PM EDT | Special Weather Statement | GSP | 24 min |
| Jul 12, 6:35 PM EDT | Special Weather Statement | GSP | 25 min |
| Jul 22, 1:51 AM EDT | Special Weather Statement | GSP | 24 min |
| Jul 22, 2:15 AM EDT | Special Weather Statement | GSP | 30 min |
| Jul 22, 7:01 PM EDT | Special Weather Statement | GSP | 29 min |
| Jul 22, 7:42 PM EDT | Special Weather Statement | GSP | 33 min |
| Jul 22, 8:15 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 23, 1:24 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:03 PM EDT | Flash Flood Watch | GSP | 33 hr |
| Jul 23, 4:30 PM EDT | Areal Flood Advisory | GSP | 4 hr |
| Jul 25, 2:38 PM EDT | Special Weather Statement | GSP | 52 min |
| Jul 25, 3:18 PM EDT | Special Weather Statement | GSP | 27 min |
| Jul 25, 3:52 PM EDT | Special Weather Statement | GSP | 38 min |
| Jul 25, 4:05 PM EDT | Areal Flood Advisory | GSP | 56 min |
| Jul 29, 5:23 PM EDT | Special Weather Statement | GSP | 37 min |
| Jul 29, 6:15 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 29, 6:38 PM EDT | Special Weather Statement | GSP | 37 min |
| Jul 30, 2:26 PM EDT | Special Weather Statement | GSP | 49 min |
| Jul 31, 3:58 AM EDT | Flash Flood Watch | GSP | 4 days |
| Aug 1, 8:39 PM EDT | Special Weather Statement | GSP | 36 min |
| Aug 2, 4:09 PM EDT | Special Weather Statement | GSP | 51 min |
| Aug 2, 4:28 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Aug 5, 1:11 PM EDT | Special Weather Statement | GSP | 64 min |
| Aug 6, 6:11 PM EDT | Special Weather Statement | GSP | 34 min |
| Aug 6, 6:19 PM EDT | Areal Flood Advisory | GSP | 116 min |
| Aug 7, 9:53 PM EDT | Severe Thunderstorm Warning | GSP | 52 min |
| Aug 8, 5:48 PM EDT | Severe Thunderstorm Warning | GSP | 57 min |
| Aug 8, 7:14 PM EDT | Special Weather Statement | GSP | 31 min |
| Aug 12, 8:07 PM EDT | Special Weather Statement | GSP | 23 min |
| Aug 12, 8:32 PM EDT | Special Weather Statement | GSP | 28 min |
| Aug 12, 8:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Aug 12, 9:08 PM EDT | Areal Flood Advisory | GSP | 112 min |
| Aug 18, 2:45 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 21, 8:19 PM EDT | Special Weather Statement | GSP | 41 min |
| Aug 21, 8:40 PM EDT | Special Weather Statement | GSP | 50 min |
| Aug 30, 5:28 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Aug 31, 3:21 PM EDT | Special Weather Statement | GSP | 24 min |
| Sep 10, 3:24 PM EDT | Special Weather Statement | GSP | 51 min |
| Sep 11, 7:26 PM EDT | Special Weather Statement | CAE | 34 min |
| Sep 13, 3:09 PM EDT | Flash Flood Watch | GSP | 4 days |
| Sep 14, 5:36 PM EDT | Wind Advisory | GSP | 48 hr |
| Sep 14, 9:47 PM EDT | Special Weather Statement | GSP | 43 min |
| Sep 15, 2:56 PM EDT | Flash Flood Warning | GSP | 7 hr |
| Sep 15, 4:09 PM EDT | Special Weather Statement | GSP | 66 min |
| Sep 15, 5:25 PM EDT | Special Weather Statement | GSP | 95 min |
| Sep 15, 7:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Sep 15, 7:48 PM EDT | Special Weather Statement | GSP | 72 min |
| Sep 15, 9:01 PM EDT | Special Weather Statement | GSP | 59 min |
| Sep 15, 10:04 PM EDT | Special Weather Statement | GSP | 71 min |
| Sep 15, 11:19 PM EDT | Special Weather Statement | GSP | 56 min |
| Sep 16, 12:17 AM EDT | Special Weather Statement | GSP | 88 min |
| Sep 16, 1:54 AM EDT | Special Weather Statement | GSP | 81 min |
| Sep 16, 3:49 AM EDT | Special Weather Statement | GSP | 116 min |
| Sep 16, 6:56 AM EDT | Special Weather Statement | GSP | 94 min |
| Sep 16, 7:48 AM EDT | Flash Flood Warning | GSP | 5 hr |
| Sep 16, 1:16 PM EDT | Flash Flood Warning | GSP | 12 hr |
| Sep 16, 2:39 PM EDT | Special Weather Statement | GSP | 21 min |
| Sep 16, 5:20 PM EDT | Special Weather Statement | GSP | 55 min |
| Sep 17, 1:17 AM EDT | Areal Flood Warning | GSP | 17 hr |
| Sep 27, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 27, 9:27 PM EDT | Severe Thunderstorm Warning | GSP | 48 min |
| Oct 7, 5:30 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| Oct 9, 3:37 PM EDT | Flash Flood Watch | GSP | 52 hr |
| Oct 10, 5:19 AM EDT | Tropical Storm Watch | GSP | 6 hr |
| Oct 10, 5:19 AM EDT | Tropical Storm Warning | GSP | 36 hr |
| Oct 10, 4:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 4:52 PM EDT | Areal Flood Advisory | GSP | 5 hr |
| Oct 10, 11:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Oct 11, 4:34 AM EDT | Mesoscale Discussion | SPC | 56 min |
| Oct 16, 6:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 21, 4:14 AM EDT | Frost Advisory | GSP | 30 hr |
| Nov 2, 3:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Nov 5, 8:48 PM EST | Dense Fog Advisory | GSP | 10 hr |
| Nov 6, 11:22 AM EST | Special Weather Statement | GSP | 53 min |
| Nov 6, 12:14 PM EST | Special Weather Statement | GSP | 46 min |
| Nov 6, 1:00 PM EST | Special Weather Statement | GSP | 15 min |
| Nov 9, 3:38 AM EST | Freeze Watch | GSP | 24 hr |
| Nov 10, 3:34 AM EST | Freeze Warning | GSP | 29 hr |
| Nov 12, 9:41 PM EST | Special Weather Statement | GSP | 2 hr |
| Nov 12, 10:53 PM EST | Areal Flood Advisory | GSP | 4 hr |
| Nov 13, 2:38 AM EST | Areal Flood Advisory | GSP | 4 hr |
| Nov 13, 7:22 AM EST | Areal Flood Warning | GSP | 3 hr |
| Nov 13, 3:11 PM EST | Flood Watch | GSP | 52 hr |
| Nov 15, 8:44 AM EST | Areal Flood Advisory | GSP | 4 hr |
| Nov 24, 10:08 PM EST | Dense Fog Advisory | GSP | 12 hr |
| Dec 6, 4:05 PM EST | Winter Storm Watch | GSP | 24 hr |
| Dec 7, 4:20 AM EST | Winter Storm Warning | GSP | 3 days |
| Dec 8, 10:54 AM EST | Winter Weather Advisory | GSP | 3 days |
| Dec 9, 3:08 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 9, 8:18 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 13, 3:12 PM EST | Flood Watch | GSP | 48 hr |
| Dec 15, 6:36 PM EST | Dense Fog Advisory | GSP | 3 hr |
| Dec 26, 3:01 PM EST | Flood Watch | GSP | 52 hr |
| Dec 28, 1:24 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 28, 1:25 PM EST | Special Weather Statement | GSP | 35 min |
| Dec 28, 1:41 PM EST | Special Weather Statement | GSP | 49 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 | 14 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 86 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 6 |
| Flood Watch | 3 |
| Areal Flood Advisory | 11 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.