Alert archive / Georgia / Clayton County
Weather alerts in Clayton County, Georgia, 2015
145 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clayton County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 145
- Warnings
- 33
- Watches
- 15
- Advisories
- 26
- Busiest month
- July26 alerts
- Busiest day
- December 24, 20159 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clayton County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 3 | 100% | 17 min |
| Flash flood warnings | 4 | 2 | 50% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Atlanta, GA: tornado warnings | 16 | 5 | 69% | 17 | 41% | 9 min |
| NWS Atlanta, GA: severe thunderstorm warnings | 374 | 223 | 40% | 483 | 74% | 16 min |
| NWS Atlanta, GA: flash flood warnings | 58 | 18 | 69% | 44 | 82% | 106 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 4, 5:40 AM EST | Special Weather Statement | FFC | 35 min |
| Jan 6, 5:17 PM EST | Wind Advisory | FFC | 32 hr |
| Jan 7, 3:28 AM EST | Wind Chill Advisory | FFC | 31 hr |
| Jan 12, 12:50 PM EST | Dense Fog Advisory | FFC | 11 hr |
| Jan 24, 9:11 AM EST | Wind Advisory | FFC | 9 hr |
| Jan 26, 3:41 AM EST | Wind Advisory | FFC | 16 hr |
| Feb 2, 3:27 AM EST | Wind Advisory | FFC | 15 hr |
| Feb 11, 10:06 PM EST | Wind Advisory | FFC | 20 hr |
| Feb 14, 3:52 PM EST | Winter Storm Watch | FFC | 24 hr |
| Feb 18, 2:31 AM EST | Wind Chill Advisory | FFC | 35 hr |
| Feb 18, 2:35 AM EST | Wind Advisory | FFC | 16 hr |
| Feb 23, 2:30 AM EST | Dense Fog Advisory | FFC | 4 hr |
| Feb 24, 3:19 AM EST | Winter Storm Watch | FFC | 12 hr |
| Feb 24, 3:33 PM EST | Winter Storm Warning | FFC | 42 hr |
| Feb 25, 1:59 AM EST | Freezing Fog Advisory | FFC | 7 hr |
| Mar 2, 4:17 AM EST | Dense Fog Advisory | FFC | 5 hr |
| Mar 3, 8:49 PM EST | Dense Fog Advisory | FFC | 13 hr |
| Mar 11, 7:21 AM EDT | Dense Fog Advisory | FFC | 3 hr |
| Mar 12, 12:31 AM EDT | Dense Fog Advisory | FFC | 9 hr |
| Mar 14, 9:47 AM EDT | Dense Fog Advisory | FFC | 3 hr |
| Mar 27, 5:24 AM EDT | Freeze Watch | FFC | 23 hr |
| Mar 27, 5:24 AM EDT | Freeze Warning | FFC | 29 hr |
| Mar 28, 3:58 AM EDT | Freeze Warning | FFC | 30 hr |
| Mar 31, 1:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Mar 31, 4:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Mar 31, 6:09 PM EDT | Severe Thunderstorm Warning | FFC | 51 min |
| Mar 31, 6:30 PM EDT | Severe Thunderstorm Warning | FFC | 30 min |
| Apr 7, 7:56 AM EDT | Dense Fog Advisory | FFC | 2 hr |
| Apr 10, 7:39 PM EDT | Special Weather Statement | FFC | 21 min |
| Apr 10, 7:41 PM EDT | Special Weather Statement | FFC | 19 min |
| Apr 19, 7:57 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 19, 8:01 AM EDT | Flash Flood Watch | FFC | 10 hr |
| Apr 20, 1:23 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 25, 5:38 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 18, 12:57 PM EDT | Special Weather Statement | FFC | 33 min |
| May 18, 5:40 PM EDT | Special Weather Statement | FFC | 35 min |
| May 18, 6:13 PM EDT | Special Weather Statement | FFC | 32 min |
| May 26, 4:16 PM EDT | Special Weather Statement | FFC | 29 min |
| May 26, 4:25 PM EDT | Severe Thunderstorm Warning | FFC | 50 min |
| May 27, 11:46 PM EDT | Special Weather Statement | FFC | 29 min |
| May 28, 1:05 AM EDT | Special Weather Statement | FFC | 25 min |
| May 31, 8:05 PM EDT | Special Weather Statement | FFC | 25 min |
| Jun 9, 3:10 PM EDT | Severe Thunderstorm Warning | FFC | 50 min |
| Jun 9, 3:52 PM EDT | Severe Thunderstorm Warning | FFC | 53 min |
| Jun 9, 5:16 PM EDT | Special Weather Statement | FFC | 29 min |
| Jun 9, 10:42 PM EDT | River Flood Warning | FFC | 7 hr |
| Jun 11, 11:59 AM EDT | Special Weather Statement | FFC | 31 min |
| Jun 18, 1:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 5:20 PM EDT | Special Weather Statement | FFC | 25 min |
| Jun 18, 5:24 PM EDT | Severe Thunderstorm Warning | FFC | 20 min |
| Jun 20, 1:49 PM EDT | Special Weather Statement | FFC | 26 min |
| Jun 20, 4:24 PM EDT | Special Weather Statement | FFC | 36 min |
| Jun 20, 4:57 PM EDT | Special Weather Statement | FFC | 33 min |
| Jun 24, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 2:46 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 3:40 PM EDT | Severe Thunderstorm Warning | FFC | 50 min |
| Jun 24, 4:03 PM EDT | Severe Thunderstorm Warning | FFC | 42 min |
| Jun 24, 4:30 PM EDT | Severe Thunderstorm Warning | FFC | 30 min |
| Jun 24, 4:43 PM EDT | Severe Thunderstorm Warning | FFC | 47 min |
| Jun 24, 5:05 PM EDT | Severe Thunderstorm Warning | FFC | 40 min |
| Jun 24, 5:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 27, 5:58 PM EDT | Special Weather Statement | FFC | 32 min |
| Jun 30, 8:59 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 12:14 PM EDT | Special Weather Statement | FFC | 31 min |
| Jun 30, 1:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 1, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 1, 5:23 PM EDT | Special Weather Statement | FFC | 37 min |
| Jul 1, 6:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 2, 1:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 3, 9:17 AM EDT | Special Weather Statement | FFC | 28 min |
| Jul 3, 9:49 AM EDT | Special Weather Statement | FFC | 26 min |
| Jul 3, 10:07 AM EDT | Severe Thunderstorm Warning | FFC | 38 min |
| Jul 3, 10:15 AM EDT | Flash Flood Watch | FFC | 52 hr |
| Jul 3, 11:44 PM EDT | Special Weather Statement | FFC | 31 min |
| Jul 4, 12:10 AM EDT | Special Weather Statement | FFC | 35 min |
| Jul 11, 4:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 4:56 PM EDT | Special Weather Statement | FFC | 34 min |
| Jul 14, 4:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 6:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 7:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 14, 9:22 PM EDT | Severe Thunderstorm Warning | FFC | 38 min |
| Jul 14, 9:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 14, 9:53 PM EDT | Special Weather Statement | FFC | 52 min |
| Jul 14, 10:39 PM EDT | Special Weather Statement | FFC | 51 min |
| Jul 15, 4:12 PM EDT | Severe Thunderstorm Warning | FFC | 48 min |
| Jul 18, 4:55 PM EDT | Severe Thunderstorm Warning | FFC | 35 min |
| Jul 21, 4:04 PM EDT | Special Weather Statement | FFC | 26 min |
| Jul 21, 8:36 PM EDT | Special Weather Statement | FFC | 24 min |
| Jul 22, 6:59 PM EDT | Special Weather Statement | FFC | 31 min |
| Jul 22, 7:32 PM EDT | Special Weather Statement | FFC | 28 min |
| Jul 30, 5:50 PM EDT | Special Weather Statement | FFC | 25 min |
| Aug 6, 2:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 6:38 PM EDT | Special Weather Statement | FFC | 52 min |
| Aug 11, 1:30 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 13, 3:01 PM EDT | Special Weather Statement | FFC | 29 min |
| Aug 17, 5:25 PM EDT | Special Weather Statement | FFC | 50 min |
| Aug 17, 6:17 PM EDT | Special Weather Statement | FFC | 43 min |
| Aug 18, 4:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 8:12 AM EDT | Special Weather Statement | FFC | 33 min |
| Aug 23, 9:43 AM EDT | Special Weather Statement | FFC | 47 min |
| Aug 30, 9:09 AM EDT | Special Weather Statement | FFC | 36 min |
| Aug 30, 10:02 AM EDT | Special Weather Statement | FFC | 58 min |
| Sep 3, 3:44 PM EDT | Special Weather Statement | FFC | 31 min |
| Sep 5, 8:28 PM EDT | Special Weather Statement | FFC | 47 min |
| Sep 10, 7:20 PM EDT | Special Weather Statement | FFC | 25 min |
| Sep 10, 7:43 PM EDT | Special Weather Statement | FFC | 32 min |
| Sep 10, 8:08 PM EDT | Special Weather Statement | FFC | 22 min |
| Sep 10, 8:30 PM EDT | Special Weather Statement | FFC | 45 min |
| Sep 30, 12:55 AM EDT | Dense Fog Advisory | FFC | 9 hr |
| Oct 10, 4:48 AM EDT | Special Weather Statement | FFC | 27 min |
| Oct 12, 4:13 AM EDT | Dense Fog Advisory | FFC | 6 hr |
| Nov 1, 2:44 PM EST | Flood Watch | FFC | 27 hr |
| Nov 2, 6:25 AM EST | Special Weather Statement | FFC | 65 min |
| Nov 2, 7:29 AM EST | Special Weather Statement | FFC | 61 min |
| Nov 2, 8:40 AM EST | Areal Flood Warning | FFC | 12 hr |
| Nov 2, 9:27 AM EST | River Flood Warning | FFC | 48 hr |
| Nov 2, 9:18 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Nov 6, 1:12 AM EST | Dense Fog Advisory | FFC | 7 hr |
| Nov 8, 12:00 PM EST | Flood Watch | FFC | 22 hr |
| Nov 13, 6:58 PM EST | Frost Advisory | FFC | 14 hr |
| Nov 14, 6:13 AM EST | Freeze Warning | FFC | 27 hr |
| Nov 17, 5:11 AM EST | Wind Advisory | FFC | 38 hr |
| Nov 17, 3:10 PM EST | Flood Watch | FFC | 36 hr |
| Nov 18, 1:17 PM EST | Mesoscale Discussion | SPC | 88 min |
| Nov 18, 5:18 PM EST | Special Weather Statement | FFC | 42 min |
| Dec 12, 4:43 AM EST | Dense Fog Advisory | FFC | 5 hr |
| Dec 17, 1:28 AM EST | Special Weather Statement | FFC | 62 min |
| Dec 17, 3:50 AM EST | Special Weather Statement | FFC | 55 min |
| Dec 21, 2:33 PM EST | Flood Watch | FFC | 5 days |
| Dec 22, 9:25 AM EST | Dense Fog Advisory | FFC | 3 hr |
| Dec 22, 10:34 PM EST | Dense Fog Advisory | FFC | 11 hr |
| Dec 24, 12:35 AM EST | Special Weather Statement | FFC | 25 min |
| Dec 24, 4:27 AM EST | Mesoscale Discussion | SPC | 93 min |
| Dec 24, 8:01 AM EST | Flash Flood Warning | FFC | 6 hr |
| Dec 24, 9:42 AM EST | Flash Flood Warning | FFC | 6 hr |
| Dec 24, 12:30 PM EST | Flash Flood Warning | FFC | 6 hr |
| Dec 24, 2:10 PM EST | Areal Flood Warning | FFC | 6 hr |
| Dec 24, 3:03 PM EST | River Flood Warning | FFC | 53 hr |
| Dec 24, 3:45 PM EST | Areal Flood Warning | FFC | 6 hr |
| Dec 24, 6:30 PM EST | River Flood Warning | FFC | 42 hr |
| Dec 27, 3:28 AM EST | Flood Watch | FFC | 5 days |
| Dec 29, 7:53 PM EST | River Flood Warning | FFC | 15 hr |
| Dec 30, 12:50 PM EST | Flash Flood Warning | FFC | 9 hr |
| Dec 30, 3:17 PM EST | River Flood Warning | FFC | 32 hr |
| Dec 31, 2:31 AM EST | River Flood Warning | FFC | 24 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 | 15 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 52 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 4 |
| River Flood Warning | 7 |
| Flash Flood Watch | 2 |
| Flood Watch | 5 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 15 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.