Alert archive / North Carolina / Polk County
Weather alerts in Polk County, North Carolina, 2017
159 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Polk County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 159
- Warnings
- 29
- Watches
- 21
- Advisories
- 38
- Busiest month
- July30 alerts
- Busiest day
- October 23, 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 1 tornado reports fell inside a warning.
Polk County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 16 | 14 | 13% | 4 | 50% | 17 min |
| Flash flood warnings | 0 | 0 |
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, 3:18 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 7, 3:42 AM EST | Wind Chill Advisory | GSP | 32 hr |
| Jan 7, 3:04 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 8, 2:55 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 9, 2:48 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 21, 3:31 AM EST | Dense Fog Advisory | GSP | 8 hr |
| Jan 23, 3:48 AM EST | Wind Advisory | GSP | 32 hr |
| Feb 8, 3:46 AM EST | Wind Advisory | GSP | 39 hr |
| Feb 8, 4:11 AM EST | Dense Fog Advisory | GSP | 6 hr |
| Feb 8, 6:54 PM EST | Special Weather Statement | GSP | 36 min |
| Feb 11, 2:54 PM EST | High Wind Watch | GSP | 13 hr |
| Feb 12, 3:51 AM EST | High Wind Warning | GSP | 33 hr |
| Feb 12, 3:51 AM EST | Wind Advisory | GSP | 33 hr |
| Mar 1, 2:07 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 1, 2:35 PM EST | Wind Advisory | GSP | 21 hr |
| Mar 1, 3:02 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 1, 5:03 PM EST | Severe Thunderstorm Warning | GSP | 42 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, 3:53 AM EST | Wind Advisory | GSP | 17 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 19, 4:10 AM EDT | Frost Advisory | GSP | 29 hr |
| Mar 21, 6:30 PM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Mar 21, 9:40 PM EDT | Special Weather Statement | GSP | 65 min |
| Apr 5, 3:50 AM EDT | High Wind Watch | GSP | 12 hr |
| Apr 5, 3:31 PM EDT | High Wind Warning | GSP | 43 hr |
| Apr 5, 3:31 PM EDT | Wind Advisory | GSP | 52 hr |
| Apr 6, 12:13 AM EDT | Special Weather Statement | GSP | 47 min |
| Apr 8, 2:37 PM EDT | Frost Advisory | GSP | 18 hr |
| Apr 21, 1:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Apr 21, 2:16 PM EDT | Special Weather Statement | GSP | 29 min |
| Apr 21, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 22, 5:55 AM EDT | Dense Fog Advisory | GSP | 3 hr |
| Apr 22, 2:57 PM EDT | Flood Watch | GSP | 61 hr |
| Apr 23, 8:11 PM EDT | Special Weather Statement | GSP | 2 hr |
| Apr 23, 8:24 PM EDT | Special Weather Statement | GSP | 111 min |
| Apr 23, 10:23 PM EDT | Special Weather Statement | GSP | 52 min |
| Apr 24, 12:13 PM EDT | Areal Flood Advisory | GSP | 6 hr |
| Apr 27, 3:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 28, 6:37 AM EDT | Dense Fog Advisory | GSP | 3 hr |
| May 1, 1:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 1, 2:48 PM EDT | Wind Advisory | GSP | 24 hr |
| May 3, 3:26 AM EDT | Wind Advisory | GSP | 43 hr |
| May 4, 8:16 PM EDT | Special Weather Statement | GSP | 29 min |
| May 5, 2:00 AM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| May 6, 3:34 PM EDT | Special Weather Statement | GSP | 26 min |
| May 12, 2:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 1:42 PM EDT | Severe Thunderstorm Warning | GSP | 28 min |
| May 19, 2:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 3:09 PM EDT | Severe Thunderstorm Warning | GSP | 51 min |
| May 21, 4:24 AM EDT | Flash Flood Watch | GSP | 18 hr |
| May 22, 1:54 PM EDT | Flash Flood Watch | GSP | 36 hr |
| May 22, 3:32 PM EDT | Special Weather Statement | GSP | 28 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, 2:47 PM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| May 24, 3:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 24, 5:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 24, 6:46 PM EDT | Special Weather Statement | GSP | 44 min |
| May 27, 6:55 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 27, 10:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 28, 12:18 AM EDT | Severe Thunderstorm Warning | GSP | 57 min |
| May 29, 4:47 PM EDT | Special Weather Statement | GSP | 28 min |
| May 29, 5:11 PM EDT | Special Weather Statement | GSP | 34 min |
| Jun 13, 6:25 PM EDT | Special Weather Statement | GSP | 35 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 1:52 PM EDT | Special Weather Statement | GSP | 23 min |
| Jun 14, 2:24 PM EDT | Special Weather Statement | GSP | 36 min |
| Jun 14, 3:06 PM EDT | Special Weather Statement | GSP | 24 min |
| Jun 15, 2:26 PM EDT | Special Weather Statement | GSP | 34 min |
| Jun 16, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 16, 7:33 PM EDT | Special Weather Statement | GSP | 27 min |
| Jun 17, 9:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Jul 1, 4:41 PM EDT | Special Weather Statement | GSP | 34 min |
| Jul 1, 4:51 PM EDT | Severe Thunderstorm Warning | GSP | 39 min |
| Jul 1, 7:14 PM EDT | Special Weather Statement | GSP | 31 min |
| Jul 1, 7:44 PM EDT | Special Weather Statement | GSP | 31 min |
| Jul 2, 2:41 PM EDT | Special Weather Statement | GSP | 49 min |
| Jul 5, 3:01 PM EDT | Special Weather Statement | GSP | 44 min |
| Jul 5, 4:34 PM EDT | Special Weather Statement | GSP | 41 min |
| Jul 5, 5:18 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 5, 6:20 PM EDT | Special Weather Statement | GSP | 40 min |
| Jul 6, 2:10 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Jul 6, 4:31 PM EDT | Special Weather Statement | GSP | 44 min |
| Jul 6, 5:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 7, 2:42 PM EDT | Special Weather Statement | GSP | 48 min |
| Jul 7, 3:23 PM EDT | Special Weather Statement | GSP | 52 min |
| Jul 8, 3:32 PM EDT | Special Weather Statement | GSP | 28 min |
| Jul 8, 4:05 PM EDT | Severe Thunderstorm Warning | GSP | 40 min |
| Jul 8, 4:15 PM EDT | Severe Thunderstorm Warning | GSP | 24 min |
| Jul 10, 8:49 PM EDT | Special Weather Statement | GSP | 26 min |
| Jul 10, 10:20 PM EDT | Special Weather Statement | GSP | 40 min |
| Jul 14, 6:38 PM EDT | Special Weather Statement | GSP | 37 min |
| Jul 15, 1:04 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| Jul 15, 1:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 16, 11:31 PM EDT | Special Weather Statement | GSP | 29 min |
| Jul 17, 6:48 PM EDT | Special Weather Statement | GSP | 27 min |
| Jul 17, 7:09 PM EDT | Severe Thunderstorm Warning | GSP | 36 min |
| Jul 17, 7:16 PM EDT | Special Weather Statement | GSP | 29 min |
| Jul 23, 11:36 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:20 PM EDT | Severe Thunderstorm Warning | GSP | 40 min |
| Jul 27, 4:20 PM EDT | Special Weather Statement | GSP | 25 min |
| Jul 28, 1:48 PM EDT | Special Weather Statement | GSP | 42 min |
| Aug 7, 5:18 PM EDT | Severe Thunderstorm Warning | GSP | 42 min |
| Aug 7, 5:56 PM EDT | Special Weather Statement | GSP | 34 min |
| Aug 13, 11:21 PM EDT | Special Weather Statement | GSP | 54 min |
| Aug 14, 12:10 AM EDT | Special Weather Statement | GSP | 65 min |
| Aug 16, 5:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Aug 17, 4:56 PM EDT | Special Weather Statement | GSP | 34 min |
| Sep 1, 2:28 PM EDT | Special Weather Statement | GSP | 47 min |
| Sep 1, 3:10 PM EDT | Special Weather Statement | GSP | 50 min |
| Sep 5, 3:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Sep 5, 6:00 PM EDT | Special Weather Statement | GSP | 30 min |
| Sep 10, 4:36 AM EDT | Flash Flood Watch | GSP | 47 hr |
| Sep 10, 5:30 AM EDT | High Wind Watch | GSP | 10 hr |
| Sep 10, 3:34 PM EDT | High Wind Warning | GSP | 31 hr |
| Sep 10, 3:34 PM EDT | Wind Advisory | GSP | 36 hr |
| Sep 12, 2:12 AM EDT | Areal Flood Advisory | GSP | 6 hr |
| Oct 7, 2:57 PM EDT | Flash Flood Watch | GSP | 37 hr |
| Oct 7, 3:03 PM EDT | Wind Advisory | GSP | 37 hr |
| Oct 8, 1:36 PM EDT | Special Weather Statement | GSP | 54 min |
| Oct 8, 2:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 8, 5:49 PM EDT | Severe Thunderstorm Warning | GSP | 41 min |
| Oct 8, 6:12 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Oct 15, 5:08 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| Oct 23, 12:27 PM EDT | Special Weather Statement | GSP | 33 min |
| Oct 23, 1:00 PM EDT | Special Weather Statement | GSP | 45 min |
| Oct 23, 1:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Oct 23, 2:00 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 23, 2:25 PM EDT | Special Weather Statement | GSP | 35 min |
| Oct 23, 3:04 PM EDT | Areal Flood Advisory | GSP | 6 hr |
| Oct 23, 7:20 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Oct 25, 3:13 AM EDT | Frost Advisory | GSP | 30 hr |
| Oct 26, 2:54 PM EDT | Frost Advisory | GSP | 18 hr |
| Oct 28, 8:28 PM EDT | Areal Flood Advisory | GSP | 2 hr |
| Oct 28, 10:29 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Oct 28, 10:39 PM EDT | Areal Flood Advisory | GSP | 3 hr |
| Oct 29, 4:29 AM EDT | Freeze Warning | GSP | 30 hr |
| Nov 9, 2:55 PM EST | Freeze Watch | GSP | 12 hr |
| Nov 10, 2:57 AM EST | Freeze Warning | GSP | 31 hr |
| Nov 13, 5:15 AM EST | Dense Fog Advisory | GSP | 6 hr |
| Nov 18, 3:53 AM EST | Wind Advisory | GSP | 32 hr |
| Dec 7, 4:42 PM EST | Winter Weather Advisory | GSP | 43 hr |
| Dec 7, 9:47 PM EST | Winter Storm Warning | GSP | 38 hr |
| Dec 9, 2:45 PM EST | Winter Weather Advisory | GSP | 19 hr |
| Dec 24, 4:00 AM EST | Wind Advisory | GSP | 31 hr |
| Dec 31, 3:41 PM EST | Winter Weather Advisory | GSP | 18 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 | 16 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 53 |
| Flooding | |
| Flash Flood Watch | 5 |
| Flood Watch | 1 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Cold | |
| Freeze Warning | 8 |
| Freeze Watch | 7 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 3 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
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.