Alert archive / North Carolina / Swain County
Weather alerts in Swain County, North Carolina, 2018
129 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Swain County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 129
- Warnings
- 23
- Watches
- 14
- Advisories
- 53
- Busiest month
- June27 alerts
- Busiest day
- June 25, 20186 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Swain County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 8 | 33% | 2 | 100% | 26 min |
| Flash flood warnings | 1 | 1 | 0% | 3 | 67% | 51 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 1, 2:31 AM EST | Wind Chill Advisory | GSP | 31 hr |
| Jan 3, 3:47 AM EST | Wind Chill Advisory | GSP | 48 hr |
| Jan 4, 3:29 AM EST | Wind Chill Advisory | GSP | 33 hr |
| Jan 5, 3:57 AM EST | Wind Chill Advisory | GSP | 31 hr |
| Jan 7, 2:51 PM EST | Winter Weather Advisory | GSP | 24 hr |
| Jan 15, 3:32 PM EST | Winter Weather Advisory | GSP | 4 days |
| Jan 17, 4:27 AM EST | Wind Chill Advisory | GSP | 30 hr |
| Jan 17, 2:53 PM EST | Winter Weather Advisory | GSP | 45 hr |
| Jan 22, 2:52 AM EST | Wind Advisory | GSP | 25 hr |
| Jan 28, 3:23 PM EST | Winter Weather Advisory | GSP | 43 hr |
| Feb 1, 4:08 AM EST | Winter Weather Advisory | GSP | 29 hr |
| Feb 3, 3:28 AM EST | Winter Weather Advisory | GSP | 33 hr |
| Feb 9, 3:46 AM EST | Flood Watch | GSP | 3 days |
| Feb 11, 9:14 AM EST | River Flood Advisory | GSP | 12 hr |
| Feb 11, 10:25 AM EST | River Flood Advisory | GSP | 12 hr |
| Feb 11, 12:22 PM EST | River Flood Warning | GSP | 16 hr |
| Feb 11, 12:46 PM EST | Areal Flood Advisory | GSP | 6 hr |
| Feb 11, 7:05 PM EST | Areal Flood Advisory | GSP | 13 hr |
| Feb 25, 5:42 AM EST | Special Weather Statement | GSP | 63 min |
| Feb 25, 6:42 AM EST | Special Weather Statement | GSP | 63 min |
| Feb 28, 3:35 AM EST | Flash Flood Watch | GSP | 36 hr |
| Feb 28, 2:55 PM EST | High Wind Watch | GSP | 13 hr |
| Mar 1, 4:10 AM EST | High Wind Warning | GSP | 48 hr |
| Mar 1, 2:53 PM EST | Wind Advisory | GSP | 29 hr |
| Mar 11, 4:02 AM EDT | Winter Storm Warning | GSP | 40 hr |
| Mar 11, 4:02 AM EDT | Winter Weather Advisory | GSP | 54 hr |
| Mar 13, 3:27 AM EDT | Winter Weather Advisory | GSP | 33 hr |
| Mar 14, 3:01 PM EDT | Wind Advisory | GSP | 29 hr |
| Mar 17, 9:57 PM EDT | Special Weather Statement | GSP | 33 min |
| Mar 19, 3:55 PM EDT | Winter Storm Watch | GSP | 13 hr |
| Mar 20, 4:31 AM EDT | Winter Storm Warning | GSP | 45 hr |
| Mar 20, 5:32 AM EDT | Dense Fog Advisory | GSP | 4 hr |
| Mar 24, 7:21 PM EDT | Special Weather Statement | MRX | 39 min |
| Mar 24, 7:24 PM EDT | Special Weather Statement | GSP | 36 min |
| Apr 4, 2:00 AM EDT | Mesoscale Discussion | SPC | 105 min |
| Apr 4, 2:19 AM EDT | Special Weather Statement | GSP | 41 min |
| Apr 4, 2:55 AM EDT | Special Weather Statement | GSP | 50 min |
| Apr 10, 2:51 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 14, 7:08 PM EDT | Wind Advisory | GSP | 17 hr |
| Apr 15, 3:38 AM EDT | Freeze Watch | GSP | 11 hr |
| Apr 15, 2:58 PM EDT | Freeze Warning | GSP | 42 hr |
| Apr 17, 12:28 AM EDT | Wind Advisory | GSP | 20 hr |
| Apr 18, 2:50 PM EDT | Freeze Watch | GSP | 13 hr |
| Apr 19, 4:12 AM EDT | Freeze Warning | GSP | 29 hr |
| Apr 20, 7:59 PM EDT | Frost Advisory | GSP | 13 hr |
| Apr 23, 3:36 AM EDT | Wind Advisory | GSP | 22 hr |
| Apr 28, 4:11 AM EDT | Frost Advisory | GSP | 28 hr |
| Apr 29, 3:35 AM EDT | Frost Advisory | GSP | 29 hr |
| May 7, 8:19 PM EDT | Special Weather Statement | GSP | 26 min |
| May 10, 3:33 PM EDT | Special Weather Statement | GSP | 42 min |
| May 17, 6:44 PM EDT | Special Weather Statement | GSP | 46 min |
| May 17, 11:51 PM EDT | Special Weather Statement | GSP | 84 min |
| May 24, 7:39 PM EDT | Special Weather Statement | GSP | 36 min |
| May 24, 8:21 PM EDT | Areal Flood Advisory | GSP | 114 min |
| May 26, 7:02 PM EDT | Areal Flood Advisory | GSP | 118 min |
| May 26, 7:34 PM EDT | Flash Flood Warning | GSP | 116 min |
| May 27, 4:44 AM EDT | Flash Flood Watch | GSP | 5 days |
| May 27, 9:17 PM EDT | Areal Flood Advisory | GSP | 118 min |
| May 30, 7:32 AM EDT | Areal Flood Advisory | GSP | 17 hr |
| May 31, 1:25 AM EDT | Areal Flood Advisory | GSP | 23 hr |
| May 31, 8:12 PM EDT | Special Weather Statement | GSP | 48 min |
| Jun 3, 3:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 3, 4:57 PM EDT | Severe Thunderstorm Warning | GSP | 63 min |
| Jun 8, 1:07 PM EDT | Special Weather Statement | GSP | 38 min |
| Jun 8, 1:45 PM EDT | Special Weather Statement | GSP | 60 min |
| Jun 11, 6:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Jun 12, 1:23 PM EDT | Special Weather Statement | GSP | 37 min |
| Jun 23, 3:14 PM EDT | Severe Thunderstorm Warning | GSP | 61 min |
| Jun 23, 4:06 PM EDT | Special Weather Statement | GSP | 54 min |
| Jun 24, 2:48 PM EDT | Special Weather Statement | GSP | 27 min |
| Jun 24, 3:08 PM EDT | Special Weather Statement | GSP | 37 min |
| Jun 24, 3:33 PM EDT | Severe Thunderstorm Warning | GSP | 42 min |
| Jun 24, 5:53 PM EDT | Mesoscale Discussion | SPC | 97 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, 2:17 PM EDT | Special Weather Statement | GSP | 28 min |
| Jun 25, 3:04 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| Jun 25, 3:45 PM EDT | Severe Thunderstorm Warning | GSP | 60 min |
| Jun 25, 4:19 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| Jun 26, 5:59 PM EDT | Severe Thunderstorm Warning | GSP | 46 min |
| Jun 26, 6:46 PM EDT | Severe Thunderstorm Warning | GSP | 44 min |
| Jun 27, 2:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 28, 6:30 AM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Jun 28, 7:02 AM EDT | Special Weather Statement | MRX | 28 min |
| Jun 28, 7:10 AM EDT | Special Weather Statement | GSP | 35 min |
| Jun 28, 8:04 AM EDT | Areal Flood Advisory | GSP | 4 hr |
| Jun 30, 5:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Jul 5, 7:37 PM EDT | Special Weather Statement | GSP | 23 min |
| Jul 6, 3:43 PM EDT | Special Weather Statement | MRX | 32 min |
| Jul 6, 5:29 PM EDT | Severe Thunderstorm Warning | GSP | 23 min |
| Jul 20, 10:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 21, 3:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 3:58 AM EDT | Flash Flood Watch | GSP | 4 days |
| Jul 31, 12:04 PM EDT | Special Weather Statement | GSP | 26 min |
| Aug 1, 4:01 PM EDT | Areal Flood Advisory | GSP | 6 hr |
| Aug 3, 5:30 AM EDT | Special Weather Statement | GSP | 45 min |
| Aug 8, 3:35 PM EDT | Special Weather Statement | GSP | 40 min |
| Aug 8, 4:17 PM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| Sep 9, 8:41 PM EDT | Special Weather Statement | GSP | 49 min |
| Sep 9, 11:12 PM EDT | Special Weather Statement | GSP | 63 min |
| Sep 14, 5:36 PM EDT | Wind Advisory | GSP | 48 hr |
| Sep 26, 2:50 PM EDT | Flash Flood Watch | GSP | 32 hr |
| Oct 11, 5:15 PM EDT | Wind Advisory | GSP | 11 hr |
| Oct 19, 3:13 PM EDT | Freeze Watch | GSP | 13 hr |
| Oct 20, 4:11 AM EDT | Freeze Warning | GSP | 30 hr |
| Oct 20, 4:11 AM EDT | Wind Advisory | GSP | 30 hr |
| Oct 21, 4:14 AM EDT | Freeze Warning | GSP | 30 hr |
| Oct 28, 10:42 AM EDT | Wind Advisory | GSP | 24 hr |
| Nov 1, 4:17 AM EDT | Wind Advisory | GSP | 22 hr |
| Nov 6, 2:40 AM EST | Mesoscale Discussion | SPC | 65 min |
| Nov 6, 3:15 AM EST | Tornado Watch | SPC | 5 hr |
| Nov 6, 5:26 AM EST | Severe Thunderstorm Warning | GSP | 49 min |
| Nov 9, 2:51 PM EST | Wind Advisory | GSP | 22 hr |
| Nov 27, 3:56 AM EST | Wind Chill Advisory | GSP | 30 hr |
| Dec 4, 2:50 PM EST | Winter Weather Advisory | GSP | 27 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 20, 3:43 PM EST | Winter Weather Advisory | GSP | 42 hr |
| Dec 26, 3:01 PM EST | Flood Watch | GSP | 52 hr |
| Dec 26, 3:05 PM EST | Wind Advisory | GSP | 42 hr |
| Dec 28, 2:41 AM EST | Areal Flood Advisory | GSP | 9 hr |
| Dec 28, 6:12 AM EST | River Flood Advisory | GSP | 18 hr |
| Dec 28, 6:12 AM EST | River Flood Advisory | GSP | 13 hr |
| Dec 28, 11:38 AM EST | Areal Flood Advisory | GSP | 18 hr |
| Dec 28, 12:51 PM EST | River Flood Warning | GSP | 11 hr |
| Dec 28, 9:14 PM EST | Dense Fog Advisory | GSP | 13 hr |
| Dec 29, 5:31 AM EST | Areal Flood Advisory | GSP | 4 hr |
| Dec 29, 10:21 AM EST | Areal Flood Advisory | GSP | 2 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.