Alert archive / South Carolina / Florence County
Weather alerts in Florence County, South Carolina, 2017
139 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Florence County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 139
- Warnings
- 39
- Watches
- 10
- Advisories
- 35
- Busiest month
- July25 alerts
- Busiest day
- April 3, 20176 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 warnings covering Florence County in 2017 had a tornado report inside them.
Florence County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 21 | 15 | 29% | 11 | 55% | 19 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, NC: tornado warnings | 19 | 1 | 95% | 6 | 17% | 7 min |
| NWS Wilmington, NC: severe thunderstorm warnings | 87 | 49 | 44% | 121 | 65% | 18 min |
| NWS Wilmington, NC: flash flood warnings | 9 | 3 | 67% | 8 | 88% | 49 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 2, 8:38 AM EST | Areal Flood Advisory | ILM | 52 min |
| Jan 3, 10:18 AM EST | River Flood Warning | ILM | 35 hr |
| Jan 3, 10:18 AM EST | River Flood Warning | ILM | 4 days |
| Jan 6, 11:30 AM EST | River Flood Warning | ILM | 5 days |
| Jan 6, 2:48 PM EST | Winter Weather Advisory | ILM | 25 hr |
| Jan 17, 5:06 AM EST | Dense Fog Advisory | ILM | 5 hr |
| Jan 21, 4:46 AM EST | Dense Fog Advisory | ILM | 5 hr |
| Jan 24, 8:58 AM EST | River Flood Warning | ILM | 6 days |
| Feb 9, 2:25 AM EST | Severe Thunderstorm Warning | ILM | 29 min |
| Feb 9, 3:12 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 9, 5:14 AM EST | Special Weather Statement | ILM | 76 min |
| Feb 9, 5:45 AM EST | Special Weather Statement | ILM | 60 min |
| Mar 1, 10:16 PM EST | Special Weather Statement | ILM | 59 min |
| Mar 1, 10:59 PM EST | Special Weather Statement | ILM | 61 min |
| Mar 3, 3:29 AM EST | Freeze Warning | ILM | 30 hr |
| Mar 4, 9:06 AM EST | Freeze Warning | ILM | 23 hr |
| Mar 12, 5:05 PM EDT | Freeze Warning | ILM | 16 hr |
| Mar 13, 9:22 AM EDT | Freeze Watch | ILM | 18 hr |
| Mar 14, 3:31 AM EDT | Freeze Warning | ILM | 31 hr |
| Mar 15, 11:17 AM EDT | Freeze Warning | ILM | 23 hr |
| Mar 16, 10:04 AM EDT | Freeze Warning | ILM | 24 hr |
| Mar 21, 7:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Mar 21, 11:11 PM EDT | Severe Thunderstorm Warning | ILM | 66 min |
| Mar 21, 11:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Mar 31, 12:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 4:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 3, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 3, 5:15 PM EDT | Severe Thunderstorm Warning | ILM | 60 min |
| Apr 3, 6:00 PM EDT | Severe Thunderstorm Warning | ILM | 60 min |
| Apr 3, 6:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 3, 6:50 PM EDT | Severe Thunderstorm Warning | ILM | 55 min |
| Apr 5, 2:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Apr 5, 2:45 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 5, 2:59 PM EDT | Wind Advisory | ILM | 31 hr |
| Apr 5, 3:50 PM EDT | Severe Thunderstorm Warning | ILM | 59 min |
| Apr 5, 4:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 5, 4:52 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| Apr 5, 10:08 PM EDT | River Flood Warning | ILM | 3 days |
| Apr 13, 6:27 PM EDT | Special Weather Statement | ILM | 63 min |
| Apr 18, 6:02 PM EDT | Special Weather Statement | ILM | 58 min |
| Apr 20, 6:07 AM EDT | Dense Fog Advisory | ILM | 3 hr |
| Apr 23, 4:02 AM EDT | Flash Flood Watch | ILM | 48 hr |
| Apr 24, 7:53 AM EDT | Areal Flood Advisory | ILM | 112 min |
| Apr 24, 10:31 AM EDT | Flash Flood Warning | ILM | 3 hr |
| Apr 24, 10:58 AM EDT | River Flood Warning | ILM | 16 days |
| Apr 24, 10:58 AM EDT | River Flood Warning | ILM | 5 days |
| May 4, 8:49 PM EDT | Tornado Watch | SPC | 6 hr |
| May 4, 10:36 PM EDT | Tornado Warning | ILM | 39 min |
| May 4, 11:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 5, 2:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 5, 3:09 AM EDT | Tornado Watch | SPC | 6 hr |
| May 12, 6:33 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 8:02 PM EDT | Special Weather Statement | ILM | 58 min |
| May 22, 6:49 PM EDT | Areal Flood Advisory | ILM | 116 min |
| May 23, 3:19 AM EDT | Flash Flood Watch | ILM | 38 hr |
| May 24, 3:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 3:24 PM EDT | Special Weather Statement | ILM | 66 min |
| May 25, 9:25 AM EDT | River Flood Warning | ILM | 8 days |
| May 25, 1:19 PM EDT | Special Weather Statement | ILM | 41 min |
| May 28, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 7:06 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 28, 7:41 PM EDT | Special Weather Statement | ILM | 64 min |
| May 28, 7:47 PM EDT | Severe Thunderstorm Warning | ILM | 43 min |
| May 28, 8:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 28, 8:46 PM EDT | Severe Thunderstorm Warning | ILM | 44 min |
| May 29, 8:54 PM EDT | Severe Thunderstorm Warning | ILM | 66 min |
| May 29, 9:59 PM EDT | Severe Thunderstorm Warning | ILM | 61 min |
| May 29, 10:28 PM EDT | Severe Thunderstorm Warning | ILM | 32 min |
| Jun 3, 4:28 PM EDT | Severe Thunderstorm Warning | ILM | 11 min |
| Jun 3, 4:38 PM EDT | Severe Thunderstorm Warning | ILM | 38 min |
| Jun 5, 6:33 PM EDT | Areal Flood Advisory | ILM | 57 min |
| Jun 5, 7:48 PM EDT | Areal Flood Advisory | ILM | 117 min |
| Jun 5, 7:58 PM EDT | Areal Flood Advisory | ILM | 2 hr |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 4:59 PM EDT | Special Weather Statement | ILM | 31 min |
| Jun 15, 7:14 PM EDT | Severe Thunderstorm Warning | ILM | 46 min |
| Jun 15, 7:56 PM EDT | Severe Thunderstorm Warning | ILM | 14 min |
| Jun 16, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 17, 2:47 PM EDT | Special Weather Statement | ILM | 28 min |
| Jun 19, 5:10 PM EDT | Severe Thunderstorm Warning | ILM | 25 min |
| Jun 22, 11:15 AM EDT | River Flood Warning | ILM | 5 days |
| Jul 1, 9:16 PM EDT | Special Weather Statement | ILM | 59 min |
| Jul 1, 10:12 PM EDT | Special Weather Statement | ILM | 63 min |
| Jul 1, 10:41 PM EDT | Special Weather Statement | ILM | 34 min |
| Jul 5, 4:42 PM EDT | Severe Thunderstorm Warning | ILM | 63 min |
| Jul 5, 6:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 6, 8:45 PM EDT | Special Weather Statement | ILM | 45 min |
| Jul 7, 9:43 PM EDT | Special Weather Statement | ILM | 32 min |
| Jul 9, 4:30 PM EDT | Areal Flood Advisory | ILM | 2 hr |
| Jul 10, 5:48 PM EDT | Special Weather Statement | ILM | 57 min |
| Jul 15, 11:40 AM EDT | Heat Advisory | ILM | 7 hr |
| Jul 15, 5:29 PM EDT | Special Weather Statement | ILM | 61 min |
| Jul 16, 2:50 PM EDT | Special Weather Statement | ILM | 40 min |
| Jul 16, 2:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 3:25 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| Jul 18, 6:11 AM EDT | Areal Flood Advisory | ILM | 64 min |
| Jul 18, 7:11 AM EDT | Areal Flood Advisory | ILM | 2 hr |
| Jul 18, 8:25 AM EDT | Areal Flood Advisory | ILM | 5 days |
| Jul 19, 3:21 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 3:46 AM EDT | Heat Advisory | ILM | 15 hr |
| Jul 22, 3:00 PM EDT | Heat Advisory | ILM | 28 hr |
| Jul 23, 5:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 23, 6:53 PM EDT | Areal Flood Advisory | ILM | 3 hr |
| Jul 23, 7:06 PM EDT | Severe Thunderstorm Warning | ILM | 22 min |
| Jul 23, 7:39 PM EDT | Areal Flood Advisory | ILM | 66 min |
| Jul 24, 5:46 PM EDT | Areal Flood Advisory | ILM | 89 min |
| Aug 4, 9:19 PM EDT | Special Weather Statement | ILM | 41 min |
| Aug 6, 7:47 PM EDT | Special Weather Statement | ILM | 43 min |
| Aug 6, 8:30 PM EDT | Severe Thunderstorm Warning | ILM | 15 min |
| Aug 13, 3:30 PM EDT | Special Weather Statement | ILM | 60 min |
| Aug 16, 10:07 AM EDT | Heat Advisory | ILM | 7 hr |
| Aug 17, 3:21 AM EDT | Heat Advisory | ILM | 14 hr |
| Aug 17, 3:33 PM EDT | Special Weather Statement | ILM | 42 min |
| Aug 18, 3:21 AM EDT | Heat Advisory | ILM | 15 hr |
| Aug 23, 1:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 9:58 PM EDT | Special Weather Statement | ILM | 32 min |
| Aug 23, 10:05 PM EDT | Severe Thunderstorm Warning | ILM | 25 min |
| Aug 23, 10:33 PM EDT | Special Weather Statement | ILM | 42 min |
| Aug 23, 11:14 PM EDT | Special Weather Statement | ILM | 46 min |
| Aug 23, 11:59 PM EDT | Areal Flood Advisory | ILM | 2 hr |
| Aug 28, 3:19 AM EDT | Flash Flood Watch | ILM | 24 hr |
| Sep 1, 3:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 6, 4:48 PM EDT | Special Weather Statement | ILM | 42 min |
| Sep 6, 4:56 PM EDT | Severe Thunderstorm Warning | ILM | 42 min |
| Sep 10, 3:44 AM EDT | Wind Advisory | ILM | 46 hr |
| Sep 20, 5:43 PM EDT | Special Weather Statement | ILM | 32 min |
| Oct 15, 3:11 AM EDT | Dense Fog Advisory | ILM | 8 hr |
| Oct 23, 6:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Oct 23, 8:11 PM EDT | Special Weather Statement | ILM | 49 min |
| Oct 23, 9:05 PM EDT | Special Weather Statement | ILM | 40 min |
| Nov 5, 11:13 PM EST | Dense Fog Advisory | ILM | 11 hr |
| Nov 9, 3:11 PM EST | Freeze Watch | ILM | 12 hr |
| Nov 10, 3:10 AM EST | Freeze Warning | ILM | 29 hr |
| Nov 11, 8:27 PM EST | Frost Advisory | ILM | 11 hr |
| Nov 17, 11:21 PM EST | Frost Advisory | ILM | 9 hr |
| Nov 19, 3:12 PM EST | Frost Advisory | ILM | 18 hr |
| Dec 5, 9:02 AM EST | Dense Fog Advisory | ILM | 101 min |
| Dec 31, 5:50 PM EST | Winter Weather Advisory | ILM | 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 | 21 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 31 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 9 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 16 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 2 |
| 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.