Alert archive / North Carolina / Union County
Weather alerts in Union County, North Carolina, 2017
156 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 156
- Warnings
- 37
- Watches
- 18
- Advisories
- 25
- Busiest month
- July35 alerts
- Busiest day
- April 24, 20177 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 2017 had a tornado report inside them.
Union County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 15 | 21% | 21 | 52% | 22 min |
| Flash flood warnings | 4 | 3 | 25% | 6 | 33% | 44 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 35 | 12 | 66% | 46 | 93% | 19 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 286 | 227 | 21% | 736 | 76% | 20 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 23 | 14 | 39% | 50 | 64% | 48 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 5, 3:58 AM EST | Winter Storm Watch | GSP | 11 hr |
| Jan 5, 3:15 PM EST | Winter Storm Warning | GSP | 46 hr |
| Jan 7, 3:04 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 15, 12:49 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Jan 17, 4:04 AM EST | Dense Fog Advisory | GSP | 6 hr |
| Jan 21, 3:31 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Feb 8, 7:53 PM EST | Special Weather Statement | GSP | 52 min |
| Mar 1, 3:02 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 1, 6:21 PM EST | Mesoscale Discussion | SPC | 114 min |
| Mar 1, 7:12 PM EST | Severe Thunderstorm Warning | GSP | 48 min |
| Mar 1, 7:45 PM EST | Severe Thunderstorm Warning | GSP | 75 min |
| Mar 2, 3:13 PM EST | Freeze Watch | GSP | 13 hr |
| Mar 3, 4:22 AM EST | Freeze Warning | GSP | 29 hr |
| Mar 3, 2:57 PM EST | Freeze Watch | GSP | 18 hr |
| Mar 4, 9:10 AM EST | Freeze Warning | GSP | 24 hr |
| Mar 10, 3:33 PM EST | Winter Weather Advisory | GSP | 42 hr |
| Mar 11, 3:20 PM EST | Freeze Watch | GSP | 12 hr |
| Mar 12, 4:06 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 13, 3:53 AM EDT | Freeze Watch | GSP | 24 hr |
| Mar 14, 3:25 AM EDT | Freeze Watch | GSP | 25 hr |
| Mar 14, 3:25 AM EDT | Freeze Warning | GSP | 32 hr |
| Mar 15, 3:55 AM EDT | Freeze Warning | GSP | 31 hr |
| Mar 15, 9:59 PM EDT | Freeze Watch | GSP | 6 hr |
| Mar 16, 3:31 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 18, 3:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 19, 4:10 AM EDT | Frost Advisory | GSP | 29 hr |
| Mar 21, 8:21 PM EDT | Special Weather Statement | GSP | 24 min |
| Mar 21, 8:52 PM EDT | Special Weather Statement | GSP | 23 min |
| Apr 3, 2:07 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 3, 4:05 PM EDT | Severe Thunderstorm Warning | GSP | 25 min |
| Apr 3, 4:24 PM EDT | Severe Thunderstorm Warning | GSP | 51 min |
| Apr 5, 3:31 PM EDT | Wind Advisory | GSP | 52 hr |
| Apr 5, 11:50 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 6, 2:54 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 6, 4:30 AM EDT | Special Weather Statement | GSP | 30 min |
| Apr 8, 2:37 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 20, 3:39 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Apr 22, 2:57 PM EDT | Flood Watch | GSP | 61 hr |
| Apr 23, 10:34 PM EDT | Special Weather Statement | GSP | 41 min |
| Apr 24, 1:54 AM EDT | Special Weather Statement | GSP | 21 min |
| Apr 24, 3:35 AM EDT | Areal Flood Advisory | GSP | 3 hr |
| Apr 24, 4:44 AM EDT | Areal Flood Warning | GSP | 12 hr |
| Apr 24, 7:09 AM EDT | Areal Flood Advisory | GSP | 12 hr |
| Apr 24, 11:41 AM EDT | Areal Flood Warning | GSP | 12 hr |
| Apr 24, 4:49 PM EDT | Areal Flood Warning | GSP | 6 hr |
| Apr 24, 10:34 PM EDT | Areal Flood Warning | GSP | 6 hr |
| May 1, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 1, 6:18 PM EDT | Special Weather Statement | GSP | 27 min |
| May 5, 1:50 AM EDT | Tornado Warning | GSP | 25 min |
| May 5, 2:18 AM EDT | Areal Flood Advisory | GSP | 3 hr |
| May 22, 1:54 PM EDT | Flash Flood Watch | GSP | 36 hr |
| May 23, 1:21 PM EDT | Special Weather Statement | GSP | 24 min |
| May 23, 1:43 PM EDT | Special Weather Statement | GSP | 47 min |
| May 24, 4:23 AM EDT | Flash Flood Watch | GSP | 18 hr |
| May 24, 10:04 AM EDT | Tornado Watch | SPC | 11 hr |
| May 24, 3:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 24, 4:16 PM EDT | Tornado Warning | GSP | 29 min |
| May 25, 1:08 AM EDT | Special Weather Statement | GSP | 52 min |
| May 28, 12:13 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 29, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 4:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 7:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 31, 5:42 PM EDT | Severe Thunderstorm Warning | GSP | 51 min |
| May 31, 6:45 PM EDT | Special Weather Statement | GSP | 30 min |
| May 31, 7:35 PM EDT | Areal Flood Advisory | GSP | 115 min |
| Jun 4, 5:37 AM EDT | Special Weather Statement | GSP | 23 min |
| Jun 4, 4:50 PM EDT | Special Weather Statement | GSP | 25 min |
| Jun 4, 6:18 PM EDT | Special Weather Statement | GSP | 42 min |
| Jun 13, 6:17 PM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| Jun 13, 7:00 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Jun 13, 7:04 PM EDT | Special Weather Statement | GSP | 41 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 10:32 PM EDT | Special Weather Statement | GSP | 28 min |
| Jun 19, 12:25 AM EDT | Special Weather Statement | GSP | 35 min |
| Jun 19, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 6:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 9:50 PM EDT | Special Weather Statement | GSP | 40 min |
| Jun 19, 9:58 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Jun 19, 10:31 PM EDT | Special Weather Statement | GSP | 44 min |
| Jun 19, 11:32 PM EDT | Special Weather Statement | GSP | 43 min |
| Jun 20, 12:22 AM EDT | Flash Flood Warning | GSP | 4 hr |
| Jun 24, 1:14 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 2:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 5:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Jul 1, 5:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Jul 1, 6:07 PM EDT | Special Weather Statement | CAE | 38 min |
| Jul 1, 6:18 PM EDT | Special Weather Statement | GSP | 27 min |
| Jul 1, 6:46 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Jul 4, 5:01 PM EDT | Special Weather Statement | CAE | 14 min |
| Jul 4, 5:01 PM EDT | Special Weather Statement | GSP | 29 min |
| Jul 5, 5:56 PM EDT | Severe Thunderstorm Warning | GSP | 49 min |
| Jul 5, 6:07 PM EDT | Special Weather Statement | CAE | 23 min |
| Jul 5, 6:33 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 5, 6:40 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Jul 5, 6:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 5, 7:01 PM EDT | Special Weather Statement | GSP | 14 min |
| Jul 6, 5:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 8, 4:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 8, 7:22 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 13, 8:08 PM EDT | Special Weather Statement | GSP | 37 min |
| Jul 15, 1:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 15, 3:43 PM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| Jul 18, 4:45 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 18, 5:22 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 18, 7:52 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 18, 8:07 PM EDT | Severe Thunderstorm Warning | GSP | 38 min |
| Jul 18, 8:55 PM EDT | Special Weather Statement | GSP | 35 min |
| Jul 20, 4:39 PM EDT | Special Weather Statement | GSP | 36 min |
| Jul 20, 5:16 PM EDT | Areal Flood Advisory | GSP | 119 min |
| Jul 23, 11:36 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 3:45 PM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Jul 23, 3:50 PM EDT | Special Weather Statement | GSP | 25 min |
| Jul 23, 4:20 PM EDT | Severe Thunderstorm Warning | GSP | 40 min |
| Jul 23, 4:31 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Jul 23, 4:44 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Jul 23, 5:09 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Jul 28, 4:22 PM EDT | Severe Thunderstorm Warning | GSP | 68 min |
| Jul 28, 5:30 PM EDT | Severe Thunderstorm Warning | GSP | 30 min |
| Aug 6, 6:46 PM EDT | Special Weather Statement | GSP | 29 min |
| Aug 6, 7:13 PM EDT | Special Weather Statement | GSP | 32 min |
| Aug 7, 10:34 PM EDT | Special Weather Statement | CAE | 26 min |
| Aug 7, 10:36 PM EDT | Special Weather Statement | GSP | 24 min |
| Aug 7, 11:03 PM EDT | Special Weather Statement | GSP | 27 min |
| Aug 7, 11:18 PM EDT | Special Weather Statement | GSP | 27 min |
| Aug 12, 12:56 AM EDT | Flash Flood Warning | GSP | 3 hr |
| Aug 14, 11:29 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Aug 15, 7:52 AM EDT | Dense Fog Advisory | GSP | 92 min |
| Aug 15, 6:30 PM EDT | Special Weather Statement | GSP | 45 min |
| Aug 18, 6:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Aug 22, 2:04 PM EDT | Special Weather Statement | GSP | 56 min |
| Aug 23, 1:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 3:42 PM EDT | Severe Thunderstorm Warning | GSP | 24 min |
| Aug 23, 4:03 PM EDT | Special Weather Statement | CAE | 27 min |
| Aug 23, 4:25 PM EDT | Special Weather Statement | GSP | 35 min |
| Aug 23, 5:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Sep 1, 1:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 1, 1:49 PM EDT | Tornado Watch | SPC | 8 hr |
| Sep 1, 2:25 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Sep 1, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 1, 7:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 2, 5:05 AM EDT | Dense Fog Advisory | GSP | 4 hr |
| Sep 10, 3:34 PM EDT | Wind Advisory | GSP | 36 hr |
| Oct 12, 7:06 PM EDT | Special Weather Statement | GSP | 54 min |
| Oct 15, 5:08 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| Oct 23, 1:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Oct 23, 2:00 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 23, 4:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Oct 23, 5:26 PM EDT | Severe Thunderstorm Warning | GSP | 49 min |
| Oct 23, 6:18 PM EDT | Special Weather Statement | GSP | 42 min |
| Oct 23, 6:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Oct 29, 4:29 AM EDT | Freeze Warning | GSP | 30 hr |
| Nov 6, 3:41 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Nov 13, 5:15 AM EST | Dense Fog Advisory | GSP | 6 hr |
| Nov 22, 3:50 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Dec 7, 4:42 PM EST | Winter Weather Advisory | GSP | 43 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 | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 25 |
| Special Weather Statement | 51 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 6 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.