Alert archive / Georgia / Seminole County
Weather alerts in Seminole County, Georgia, 2015
114 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Seminole County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 114
- Warnings
- 30
- Watches
- 18
- Advisories
- 36
- Busiest month
- July18 alerts
- Busiest day
- June 30, 20157 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Seminole County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 19 | 17% | 6 | 100% | 17 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Tallahassee, FL: tornado warnings | 48 | 9 | 81% | 23 | 61% | 7 min |
| NWS Tallahassee, FL: severe thunderstorm warnings | 473 | 308 | 35% | 774 | 90% | 23 min |
| NWS Tallahassee, FL: flash flood warnings | 37 | 22 | 41% | 61 | 95% | 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 |
|---|---|---|---|
| Jan 4, 8:48 AM EST | Mesoscale Discussion | SPC | 87 min |
| Jan 4, 9:29 AM EST | Severe Thunderstorm Warning | TAE | 46 min |
| Jan 6, 3:51 PM EST | Hard Freeze Watch | TAE | 11 hr |
| Jan 7, 2:23 AM EST | Wind Chill Advisory | TAE | 35 hr |
| Jan 7, 2:29 AM EST | Hard Freeze Warning | TAE | 35 hr |
| Jan 8, 1:58 PM EST | Hard Freeze Warning | TAE | 19 hr |
| Jan 12, 5:59 PM EST | Dense Fog Advisory | TAE | 12 hr |
| Jan 23, 3:42 AM EST | Flash Flood Watch | TAE | 10 hr |
| Feb 9, 2:50 PM EST | Special Weather Statement | TAE | 40 min |
| Feb 9, 3:01 PM EST | Special Weather Statement | TAE | 44 min |
| Feb 18, 2:45 AM EST | Hard Freeze Watch | TAE | 24 hr |
| Feb 18, 2:45 AM EST | Hard Freeze Warning | TAE | 31 hr |
| Feb 18, 2:05 PM EST | Wind Chill Advisory | TAE | 20 hr |
| Feb 19, 3:06 AM EST | Hard Freeze Warning | TAE | 30 hr |
| Feb 23, 1:12 AM EST | Dense Fog Advisory | TAE | 8 hr |
| Mar 2, 6:10 AM EST | Dense Fog Advisory | TAE | 4 hr |
| Mar 3, 1:32 AM EST | Dense Fog Advisory | TAE | 8 hr |
| Mar 4, 3:10 AM EST | Dense Fog Advisory | TAE | 6 hr |
| Mar 6, 2:21 PM EST | Frost Advisory | TAE | 19 hr |
| Mar 11, 5:23 AM EDT | Dense Fog Advisory | TAE | 6 hr |
| Mar 12, 1:16 AM EDT | Dense Fog Advisory | TAE | 9 hr |
| Mar 30, 2:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 31, 6:23 AM EDT | Dense Fog Advisory | TAE | 4 hr |
| Apr 3, 4:39 AM EDT | Dense Fog Advisory | TAE | 5 hr |
| Apr 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 14, 5:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 18, 4:08 PM EDT | Flash Flood Watch | TAE | 23 hr |
| Apr 19, 6:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 19, 7:57 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 25, 8:41 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 25, 9:08 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 25, 9:20 AM EDT | Severe Thunderstorm Warning | TAE | 55 min |
| Apr 25, 4:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 25, 6:45 PM EDT | Severe Thunderstorm Warning | TAE | 60 min |
| Apr 25, 7:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 20, 10:25 PM EDT | Special Weather Statement | TAE | 50 min |
| May 26, 12:35 PM EDT | Severe Thunderstorm Warning | TAE | 40 min |
| May 26, 6:23 PM EDT | Special Weather Statement | TAE | 22 min |
| May 27, 4:54 PM EDT | Special Weather Statement | TAE | 51 min |
| May 27, 5:37 PM EDT | Severe Thunderstorm Warning | TAE | 23 min |
| Jun 3, 5:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 10, 8:55 PM EDT | Severe Thunderstorm Warning | TAE | 50 min |
| Jun 17, 3:43 AM EDT | Heat Advisory | TAE | 14 hr |
| Jun 22, 3:56 PM EDT | Heat Advisory | TAE | 26 hr |
| Jun 23, 3:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 24, 8:01 PM EDT | Severe Thunderstorm Warning | TAE | 34 min |
| Jun 27, 2:17 PM EDT | Severe Thunderstorm Warning | TAE | 58 min |
| Jun 30, 12:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 30, 12:25 PM EDT | Severe Thunderstorm Warning | TAE | 65 min |
| Jun 30, 1:08 PM EDT | Severe Thunderstorm Warning | TAE | 67 min |
| Jun 30, 2:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 4:32 PM EDT | Severe Thunderstorm Warning | TAE | 43 min |
| Jun 30, 4:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 30, 5:11 PM EDT | Severe Thunderstorm Warning | TAE | 49 min |
| Jul 2, 1:48 PM EDT | Severe Thunderstorm Warning | TAE | 42 min |
| Jul 2, 2:23 PM EDT | Severe Thunderstorm Warning | TAE | 67 min |
| Jul 4, 7:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 9:55 AM EDT | Severe Thunderstorm Warning | TAE | 65 min |
| Jul 11, 2:24 AM EDT | Heat Advisory | TAE | 18 hr |
| Jul 11, 3:34 PM EDT | Heat Advisory | TAE | 27 hr |
| Jul 14, 3:40 AM EDT | Heat Advisory | TAE | 15 hr |
| Jul 14, 5:09 PM EDT | Severe Thunderstorm Warning | TAE | 51 min |
| Jul 17, 3:31 AM EDT | Heat Advisory | TAE | 16 hr |
| Jul 18, 2:21 AM EDT | Heat Advisory | TAE | 18 hr |
| Jul 19, 2:48 AM EDT | Heat Advisory | TAE | 17 hr |
| Jul 21, 3:14 AM EDT | Heat Advisory | TAE | 16 hr |
| Jul 22, 3:15 AM EDT | Heat Advisory | TAE | 16 hr |
| Jul 22, 5:42 PM EDT | Severe Thunderstorm Warning | TAE | 48 min |
| Jul 23, 3:03 AM EDT | Heat Advisory | TAE | 16 hr |
| Jul 24, 5:33 PM EDT | Severe Thunderstorm Warning | TAE | 42 min |
| Jul 28, 9:57 AM EDT | Heat Advisory | TAE | 9 hr |
| Jul 29, 2:52 AM EDT | Heat Advisory | TAE | 15 hr |
| Aug 4, 3:27 PM EDT | Severe Thunderstorm Warning | TAE | 33 min |
| Aug 7, 4:51 PM EDT | Severe Thunderstorm Warning | TAE | 39 min |
| Aug 7, 5:21 PM EDT | Severe Thunderstorm Warning | TAE | 21 min |
| Aug 8, 3:47 AM EDT | Heat Advisory | TAE | 15 hr |
| Aug 8, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Aug 20, 5:55 PM EDT | Special Weather Statement | TAE | 35 min |
| Aug 23, 1:33 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 1:44 PM EDT | Special Weather Statement | TAE | 46 min |
| Sep 10, 6:43 PM EDT | Severe Thunderstorm Warning | TAE | 47 min |
| Sep 10, 7:28 PM EDT | Severe Thunderstorm Warning | TAE | 25 min |
| Sep 22, 7:41 PM EDT | Special Weather Statement | TAE | 34 min |
| Sep 28, 4:25 AM EDT | Flash Flood Watch | TAE | 23 hr |
| Sep 30, 7:30 AM EDT | Dense Fog Advisory | TAE | 3 hr |
| Oct 12, 6:54 AM EDT | Dense Fog Advisory | TAE | 3 hr |
| Oct 29, 4:43 AM EDT | Dense Fog Advisory | TAE | 5 hr |
| Nov 1, 2:28 PM EST | Flash Flood Watch | TAE | 27 hr |
| Nov 1, 4:51 PM EST | Mesoscale Discussion | SPC | 54 min |
| Nov 2, 11:21 AM EST | Mesoscale Discussion | SPC | 54 min |
| Nov 2, 1:15 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 4, 11:40 PM EST | Areal Flood Advisory | TAE | 2 hr |
| Nov 8, 12:13 PM EST | Flood Watch | TAE | 22 hr |
| Nov 12, 6:08 AM EST | Dense Fog Advisory | TAE | 4 hr |
| Nov 18, 11:51 AM EST | Mesoscale Discussion | SPC | 114 min |
| Nov 18, 2:39 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 18, 3:16 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 18, 6:35 PM EST | Mesoscale Discussion | SPC | 115 min |
| Nov 23, 2:51 AM EST | Frost Advisory | TAE | 30 hr |
| Dec 2, 3:02 AM EST | Dense Fog Advisory | TAE | 4 hr |
| Dec 12, 4:11 AM EST | Dense Fog Advisory | TAE | 5 hr |
| Dec 15, 12:29 AM EST | Dense Fog Advisory | TAE | 9 hr |
| Dec 17, 4:21 AM EST | Mesoscale Discussion | SPC | 114 min |
| Dec 18, 3:28 AM EST | Freeze Watch | TAE | 11 hr |
| Dec 18, 2:18 PM EST | Freeze Warning | TAE | 19 hr |
| Dec 19, 3:14 AM EST | Freeze Watch | TAE | 11 hr |
| Dec 19, 2:01 PM EST | Freeze Warning | TAE | 19 hr |
| Dec 21, 3:19 AM EST | Flash Flood Watch | TAE | 61 hr |
| Dec 23, 12:42 PM EST | Mesoscale Discussion | SPC | 93 min |
| Dec 26, 2:04 AM EST | Dense Fog Advisory | TAE | 8 hr |
| Dec 26, 6:26 AM EST | River Flood Warning | TAE | 36 hr |
| Dec 28, 12:04 PM EST | Tornado Watch | SPC | 7 hr |
| Dec 28, 6:07 PM EST | Mesoscale Discussion | SPC | 53 min |
| Dec 30, 9:41 AM EST | Flash Flood Watch | TAE | 27 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 | 23 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 8 |
| Flooding | |
| River Flood Warning | 1 |
| Flash Flood Watch | 6 |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Heat | |
| Heat Advisory | 14 |
| Cold | |
| Freeze Warning | 2 |
| Hard Freeze Warning | 4 |
| Freeze Watch | 2 |
| Hard Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 17 |
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.