Alert archive / North Carolina / Swain County
Weather alerts in Swain County, North Carolina, 2011
185 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 185
- Warnings
- 37
- Watches
- 33
- Advisories
- 55
- Busiest month
- June39 alerts
- Busiest day
- April 4, 201110 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, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 18 | 10% | 9 | 89% | 26 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 42 | 11 | 74% | 25 | 96% | 21 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 693 | 551 | 20% | 1,309 | 89% | 26 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 31 | 20 | 35% | 46 | 85% | 105 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 |
|---|---|---|---|
| Dec 31, 8:42 PM EST | Lake Wind Advisory | GSP | 20 hr |
| Dec 31, 8:42 PM EST | Wind Advisory | GSP | 20 hr |
| Jan 5, 12:03 PM EST | Winter Weather Advisory | GSP | 23 hr |
| Jan 6, 3:56 AM EST | Winter Weather Advisory | GSP | 59 hr |
| Jan 7, 4:37 AM EST | Winter Storm Warning | GSP | 37 hr |
| Jan 8, 4:20 AM EST | Winter Storm Watch | GSP | 35 hr |
| Jan 8, 6:24 PM EST | Wind Chill Advisory | GSP | 15 hr |
| Jan 9, 3:53 AM EST | Winter Storm Warning | GSP | 53 hr |
| Jan 11, 3:47 AM EST | Winter Storm Watch | GSP | 18 hr |
| Jan 11, 3:47 AM EST | Winter Weather Advisory | GSP | 56 hr |
| Jan 11, 2:13 PM EST | Winter Weather Advisory | GSP | 46 hr |
| Jan 11, 10:09 PM EST | Winter Storm Warning | GSP | 38 hr |
| Jan 20, 3:01 PM EST | Winter Weather Advisory | GSP | 13 hr |
| Jan 25, 3:47 AM EST | Winter Storm Watch | GSP | 12 hr |
| Jan 25, 3:27 PM EST | Winter Storm Warning | GSP | 29 hr |
| Jan 25, 3:27 PM EST | Winter Weather Advisory | GSP | 29 hr |
| Feb 1, 4:35 AM EST | Wind Advisory | GSP | 43 hr |
| Feb 7, 2:51 PM EST | Winter Weather Advisory | GSP | 15 hr |
| Feb 9, 10:58 AM EST | Winter Weather Advisory | GSP | 16 hr |
| Feb 13, 2:42 PM EST | Fire Weather Watch | GSP | 12 hr |
| Feb 14, 2:17 AM EST | Red Flag Warning | GSP | 19 hr |
| Feb 14, 3:40 AM EST | Wind Advisory | GSP | 20 hr |
| Feb 19, 4:24 AM EST | Red Flag Warning | GSP | 17 hr |
| Feb 24, 2:18 PM EST | Lake Wind Advisory | GSP | 28 hr |
| Feb 25, 2:11 AM EST | High Wind Warning | GSP | 4 hr |
| Feb 25, 2:11 AM EST | Lake Wind Advisory | GSP | 3 hr |
| Feb 25, 2:35 AM EST | Mesoscale Discussion | SPC | 55 min |
| Feb 25, 2:57 AM EST | Severe Thunderstorm Warning | GSP | 63 min |
| Feb 25, 4:41 AM EST | Wind Advisory | GSP | 13 hr |
| Feb 27, 8:21 PM EST | Lake Wind Advisory | GSP | 23 hr |
| Feb 28, 3:46 AM EST | Wind Advisory | GSP | 14 hr |
| Feb 28, 12:25 PM EST | Mesoscale Discussion | SPC | 95 min |
| Feb 28, 1:29 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 28, 3:14 PM EST | Severe Thunderstorm Warning | GSP | 61 min |
| Mar 5, 3:31 AM EST | Lake Wind Advisory | GSP | 37 hr |
| Mar 6, 5:28 AM EST | Areal Flood Advisory | GSP | 3 hr |
| Mar 6, 9:37 AM EST | Winter Weather Advisory | GSP | 7 hr |
| Mar 8, 2:57 AM EST | Flood Watch | GSP | 58 hr |
| Mar 9, 3:42 AM EST | Lake Wind Advisory | GSP | 14 hr |
| Mar 10, 3:40 AM EST | Winter Weather Advisory | GSP | 30 hr |
| Mar 10, 4:00 AM EST | Areal Flood Advisory | GSP | 6 hr |
| Mar 10, 4:07 AM EST | Lake Wind Advisory | GSP | 38 hr |
| Mar 22, 3:51 PM EDT | Fire Weather Watch | GSP | 11 hr |
| Mar 23, 2:45 AM EDT | Lake Wind Advisory | GSP | 24 hr |
| Mar 23, 2:54 AM EDT | Red Flag Warning | GSP | 17 hr |
| Mar 23, 3:45 PM EDT | Tornado Watch | SPC | 6 hr |
| Mar 23, 4:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Mar 23, 7:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Mar 23, 8:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Mar 23, 9:21 PM EDT | Mesoscale Discussion | SPC | 24 min |
| Mar 23, 9:41 PM EDT | Tornado Watch | SPC | 2 hr |
| Mar 23, 10:22 PM EDT | Severe Thunderstorm Warning | GSP | 42 min |
| Mar 24, 3:09 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 28, 2:51 PM EDT | Frost Advisory | GSP | 18 hr |
| Mar 31, 4:11 AM EDT | Freeze Warning | GSP | 29 hr |
| Apr 1, 2:51 PM EDT | Wind Advisory | GSP | 29 hr |
| Apr 2, 2:53 PM EDT | Freeze Warning | GSP | 18 hr |
| Apr 3, 2:44 PM EDT | Lake Wind Advisory | GSP | 51 hr |
| Apr 4, 10:41 AM EDT | Wind Advisory | GSP | 17 hr |
| Apr 4, 3:01 PM EDT | Freeze Watch | GSP | 13 hr |
| Apr 4, 4:04 PM EDT | Special Weather Statement | GSP | 41 min |
| Apr 4, 4:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 4, 4:53 PM EDT | Special Weather Statement | GSP | 37 min |
| Apr 4, 5:37 PM EDT | Special Weather Statement | GSP | 38 min |
| Apr 4, 6:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 4, 6:20 PM EDT | Special Weather Statement | GSP | 40 min |
| Apr 4, 7:03 PM EDT | Special Weather Statement | GSP | 42 min |
| Apr 4, 7:48 PM EDT | Special Weather Statement | GSP | 42 min |
| Apr 4, 9:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 4, 9:50 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Apr 4, 10:42 PM EDT | Severe Thunderstorm Warning | GSP | 63 min |
| Apr 5, 4:08 AM EDT | Freeze Warning | GSP | 29 hr |
| Apr 6, 4:44 AM EDT | Frost Advisory | GSP | 28 hr |
| Apr 9, 12:34 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 9, 2:00 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 9, 4:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 9, 6:16 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 9, 6:40 PM EDT | Severe Thunderstorm Warning | GSP | 65 min |
| Apr 11, 7:42 PM EDT | Mesoscale Discussion | SPC | 33 min |
| Apr 11, 8:08 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 11, 9:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 12, 1:21 AM EDT | Lake Wind Advisory | GSP | 19 hr |
| Apr 12, 2:39 AM EDT | Mesoscale Discussion | SPC | 36 min |
| Apr 13, 2:43 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 15, 4:10 AM EDT | Lake Wind Advisory | GSP | 36 hr |
| Apr 15, 3:30 PM EDT | Wind Advisory | GSP | 17 hr |
| Apr 16, 3:52 PM EDT | Lake Wind Advisory | GSP | 14 hr |
| Apr 16, 3:52 PM EDT | Wind Advisory | GSP | 4 hr |
| Apr 27, 3:27 AM EDT | Lake Wind Advisory | GSP | 28 hr |
| Apr 27, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 27, 6:52 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 28, 12:09 AM EDT | Mesoscale Discussion | SPC | 36 min |
| Apr 28, 12:56 AM EDT | Tornado Watch | SPC | 4 hr |
| May 4, 4:17 AM EDT | Frost Advisory | GSP | 29 hr |
| May 4, 4:17 AM EDT | Freeze Warning | GSP | 29 hr |
| May 13, 12:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 13, 1:10 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 13, 3:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 22, 1:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 22, 4:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 22, 5:40 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 7:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 10:15 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 26, 3:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 26, 3:46 PM EDT | Severe Thunderstorm Warning | GSP | 59 min |
| May 26, 4:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 26, 4:43 PM EDT | Severe Thunderstorm Warning | GSP | 62 min |
| May 26, 5:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 4:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 3, 5:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 6:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 8, 2:05 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Jun 8, 3:07 PM EDT | Severe Thunderstorm Warning | GSP | 53 min |
| Jun 9, 12:42 PM EDT | Special Weather Statement | GSP | 48 min |
| Jun 9, 1:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 11, 1:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 11, 7:17 PM EDT | Special Weather Statement | GSP | 28 min |
| Jun 15, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 15, 4:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 15, 5:03 PM EDT | Severe Thunderstorm Warning | GSP | 57 min |
| Jun 18, 9:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 18, 11:05 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 18, 1:17 PM EDT | Severe Thunderstorm Warning | GSP | 73 min |
| Jun 18, 2:29 PM EDT | Severe Thunderstorm Warning | GSP | 48 min |
| Jun 19, 8:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 19, 9:15 AM EDT | Special Weather Statement | GSP | 45 min |
| Jun 19, 11:02 AM EDT | Flash Flood Watch | GSP | 19 hr |
| Jun 19, 12:42 PM EDT | Special Weather Statement | GSP | 33 min |
| Jun 19, 1:18 PM EDT | Special Weather Statement | GSP | 27 min |
| Jun 19, 1:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 19, 2:22 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 19, 9:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 19, 9:41 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 19, 10:47 PM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| Jun 19, 11:14 PM EDT | Severe Thunderstorm Warning | GSP | 46 min |
| Jun 21, 2:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 21, 6:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 22, 5:38 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 22, 5:59 PM EDT | Special Weather Statement | GSP | 46 min |
| Jun 22, 6:10 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Jun 24, 2:22 AM EDT | Special Weather Statement | GSP | 23 min |
| Jun 24, 2:59 PM EDT | Severe Thunderstorm Warning | GSP | 46 min |
| Jun 24, 3:45 PM EDT | Areal Flood Advisory | GSP | 105 min |
| Jun 26, 10:17 AM EDT | Special Weather Statement | GSP | 43 min |
| Jun 26, 6:29 PM EDT | Mesoscale Discussion | SPC | 46 min |
| Jun 27, 4:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 28, 2:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 3, 2:58 PM EDT | Special Weather Statement | GSP | 32 min |
| Jul 4, 12:50 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 4:31 AM EDT | Special Weather Statement | GSP | 44 min |
| Jul 12, 5:13 AM EDT | Special Weather Statement | GSP | 47 min |
| Jul 14, 10:53 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Jul 14, 11:14 PM EDT | Flash Flood Warning | GSP | 104 min |
| Aug 4, 12:00 AM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Aug 4, 12:35 AM EDT | Severe Thunderstorm Warning | GSP | 27 min |
| Aug 8, 2:34 PM EDT | Severe Thunderstorm Warning | GSP | 56 min |
| Aug 12, 1:46 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 1:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 14, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 18, 2:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:07 AM EDT | Special Weather Statement | GSP | 53 min |
| Aug 22, 3:54 AM EDT | Special Weather Statement | GSP | 51 min |
| Sep 2, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Sep 4, 12:33 PM EDT | Flash Flood Watch | GSP | 51 hr |
| Sep 5, 11:19 AM EDT | River Flood Warning | GSP | 21 hr |
| Sep 30, 3:22 PM EDT | Lake Wind Advisory | GSP | 36 hr |
| Oct 2, 1:52 PM EDT | Frost Advisory | GSP | 20 hr |
| Oct 3, 3:45 AM EDT | Frost Advisory | GSP | 29 hr |
| Oct 13, 2:47 PM EDT | Lake Wind Advisory | GSP | 28 hr |
| Oct 15, 3:33 AM EDT | Frost Advisory | GSP | 29 hr |
| Oct 19, 3:40 AM EDT | Lake Wind Advisory | GSP | 39 hr |
| Oct 20, 4:03 AM EDT | Freeze Warning | GSP | 29 hr |
| Oct 20, 2:49 PM EDT | Freeze Watch | GSP | 24 hr |
| Oct 21, 2:30 PM EDT | Freeze Warning | GSP | 20 hr |
| Nov 4, 4:21 AM EDT | Lake Wind Advisory | GSP | 15 hr |
| Nov 23, 3:33 AM EST | Lake Wind Advisory | GSP | 18 hr |
| Nov 27, 2:50 PM EST | Flood Watch | GSP | 20 hr |
| Nov 27, 10:23 PM EST | Lake Wind Advisory | GSP | 24 hr |
| Nov 28, 10:55 AM EST | Flood Watch | GSP | 16 hr |
| Nov 28, 9:59 PM EST | Winter Weather Advisory | GSP | 32 hr |
| Dec 6, 9:47 PM EST | Winter Weather Advisory | GSP | 28 hr |
| Dec 21, 9:26 AM EST | Special Weather Statement | GSP | 49 min |
| Dec 21, 9:24 PM EST | Dense Fog Advisory | GSP | 13 hr |
| Dec 27, 3:29 AM EST | Wind Advisory | GSP | 27 hr |
| Dec 28, 12:48 AM EST | Winter Weather 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 | 20 |
| Severe Thunderstorm Watch | 13 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 40 |
| Special Weather Statement | 20 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 13 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 2 |
| Frost Advisory | 7 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Lake Wind Advisory | 19 |
| Wind Advisory | 10 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.