Alert archive / Georgia / Seminole County
Weather alerts in Seminole County, Georgia, 2019
102 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 102
- Warnings
- 25
- Watches
- 9
- Advisories
- 25
- Busiest month
- March20 alerts
- Busiest day
- March 3, 201910 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 4 tornado warnings covering Seminole County in 2019 had a tornado report inside them.
Seminole County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 0 | ||
| Severe thunderstorm warnings | 18 | 15 | 17% | 11 | 82% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Tallahassee, FL: tornado warnings | 74 | 20 | 73% | 32 | 78% | 11 min |
| NWS Tallahassee, FL: severe thunderstorm warnings | 232 | 170 | 27% | 351 | 87% | 25 min |
| NWS Tallahassee, FL: flash flood warnings | 16 | 12 | 25% | 18 | 94% | 66 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, 6:05 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 8, 2:43 AM EST | Dense Fog Advisory | TAE | 7 hr |
| Jan 19, 4:21 PM EST | Tornado Watch | SPC | 6 hr |
| Jan 23, 9:05 AM EST | Wind Advisory | TAE | 16 hr |
| Jan 23, 9:18 PM EST | Mesoscale Discussion | SPC | 117 min |
| Feb 3, 11:03 PM EST | Dense Fog Advisory | TAE | 11 hr |
| Feb 17, 2:53 AM EST | Dense Fog Advisory | TAE | 8 hr |
| Feb 24, 7:19 AM EST | Special Weather Statement | TAE | 56 min |
| Feb 27, 9:20 PM EST | Dense Fog Advisory | TAE | 13 hr |
| Mar 2, 4:31 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 2, 4:55 AM EST | Special Weather Statement | TAE | 50 min |
| Mar 3, 10:59 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 12:24 PM EST | Tornado Watch | SPC | 10 hr |
| Mar 3, 4:22 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 3, 5:39 PM EST | Severe Thunderstorm Warning | TAE | 51 min |
| Mar 3, 6:10 PM EST | Tornado Warning | TAE | 35 min |
| Mar 3, 6:15 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 6:24 PM EST | Severe Thunderstorm Warning | TAE | 36 min |
| Mar 3, 6:27 PM EST | Severe Thunderstorm Warning | TAE | 33 min |
| Mar 3, 6:37 PM EST | Tornado Warning | TAE | 23 min |
| Mar 3, 6:53 PM EST | Tornado Warning | TAE | 37 min |
| Mar 3, 7:03 PM EST | Severe Thunderstorm Warning | TAE | 42 min |
| Mar 3, 7:12 PM EST | Tornado Warning | TAE | 33 min |
| Mar 4, 9:27 PM EST | Freeze Watch | TAE | 18 hr |
| Mar 5, 3:33 AM EST | Freeze Warning | TAE | 29 hr |
| Mar 6, 2:46 AM EST | Freeze Warning | TAE | 30 hr |
| Mar 9, 3:43 AM EST | Dense Fog Advisory | TAE | 5 hr |
| Mar 10, 8:46 PM EDT | Dense Fog Advisory | TAE | 14 hr |
| Mar 25, 4:40 AM EDT | Dense Fog Advisory | TAE | 5 hr |
| Apr 6, 3:20 AM EDT | Dense Fog Advisory | TAE | 7 hr |
| Apr 7, 7:10 AM EDT | Dense Fog Advisory | TAE | 3 hr |
| Apr 13, 3:37 PM EDT | Wind Advisory | TAE | 30 hr |
| Apr 14, 8:28 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 14, 10:40 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 14, 11:07 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 14, 11:12 AM EDT | Special Weather Statement | TAE | 63 min |
| Apr 14, 11:38 AM EDT | Severe Thunderstorm Warning | TAE | 52 min |
| Apr 14, 12:06 PM EDT | Severe Thunderstorm Warning | TAE | 39 min |
| Apr 18, 9:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 19, 1:33 AM EDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 1:59 AM EDT | Wind Advisory | TAE | 18 hr |
| Apr 19, 3:42 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 6:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 6:31 AM EDT | Special Weather Statement | TAE | 44 min |
| Apr 19, 7:15 AM EDT | Severe Thunderstorm Warning | TAE | 28 min |
| Apr 19, 8:11 AM EDT | Severe Thunderstorm Warning | TAE | 49 min |
| Apr 25, 6:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 4, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 4, 8:00 PM EDT | Special Weather Statement | TAE | 45 min |
| May 9, 6:36 PM EDT | Special Weather Statement | TAE | 39 min |
| May 9, 7:17 PM EDT | Severe Thunderstorm Warning | TAE | 28 min |
| May 9, 7:47 PM EDT | Special Weather Statement | TAE | 43 min |
| May 11, 1:27 PM EDT | Special Weather Statement | TAE | 48 min |
| May 11, 2:07 PM EDT | Special Weather Statement | TAE | 38 min |
| May 11, 2:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 9:39 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 9:59 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 12, 11:42 AM EDT | Severe Thunderstorm Warning | TAE | 48 min |
| May 12, 11:48 AM EDT | Special Weather Statement | TAE | 42 min |
| May 12, 12:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 12, 12:12 PM EDT | Severe Thunderstorm Warning | TAE | 33 min |
| May 12, 12:23 PM EDT | Severe Thunderstorm Warning | TAE | 37 min |
| May 12, 12:42 PM EDT | Severe Thunderstorm Warning | TAE | 33 min |
| May 24, 2:54 PM EDT | Heat Advisory | TAE | 3 days |
| May 30, 7:05 AM EDT | Dense Fog Advisory | TAE | 3 hr |
| Jun 8, 2:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 2:48 PM EDT | Special Weather Statement | TAE | 42 min |
| Jun 19, 2:51 PM EDT | Special Weather Statement | TAE | 39 min |
| Jun 19, 3:40 PM EDT | Special Weather Statement | TAE | 35 min |
| Jun 20, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 20, 7:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 20, 7:46 PM EDT | Severe Thunderstorm Warning | TAE | 59 min |
| Jun 24, 4:51 PM EDT | Severe Thunderstorm Warning | TAE | 69 min |
| Jun 30, 6:58 PM EDT | Special Weather Statement | TAE | 47 min |
| Jul 3, 2:42 PM EDT | Special Weather Statement | TAE | 48 min |
| Jul 3, 2:46 PM EDT | Severe Thunderstorm Warning | TAE | 29 min |
| Jul 3, 3:23 PM EDT | Special Weather Statement | TAE | 52 min |
| Jul 7, 8:35 PM EDT | Special Weather Statement | TAE | 40 min |
| Jul 7, 8:36 PM EDT | Severe Thunderstorm Warning | TAE | 24 min |
| Jul 7, 8:53 PM EDT | Severe Thunderstorm Warning | TAE | 37 min |
| Aug 3, 5:46 PM EDT | Special Weather Statement | TAE | 29 min |
| Aug 9, 2:57 AM EDT | Heat Advisory | TAE | 16 hr |
| Aug 10, 2:58 AM EDT | Heat Advisory | TAE | 15 hr |
| Aug 11, 2:39 AM EDT | Heat Advisory | TAE | 15 hr |
| Aug 12, 4:58 AM EDT | Heat Advisory | TAE | 13 hr |
| Aug 13, 3:44 AM EDT | Heat Advisory | TAE | 16 hr |
| Aug 14, 3:07 AM EDT | Heat Advisory | TAE | 16 hr |
| Aug 14, 2:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 5:33 PM EDT | Special Weather Statement | TAE | 42 min |
| Aug 25, 8:09 PM EDT | Special Weather Statement | TAE | 36 min |
| Aug 25, 8:12 PM EDT | Areal Flood Advisory | TAE | 2 hr |
| Oct 15, 7:33 PM EDT | Special Weather Statement | TAE | 27 min |
| Oct 18, 4:00 PM EDT | Wind Advisory | TAE | 28 hr |
| Oct 30, 7:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Nov 11, 2:06 PM EST | Freeze Watch | TAE | 12 hr |
| Nov 12, 1:51 AM EST | Freeze Warning | TAE | 31 hr |
| Nov 23, 3:29 AM EST | Dense Fog Advisory | TAE | 6 hr |
| Dec 9, 11:38 PM EST | Dense Fog Advisory | TAE | 10 hr |
| Dec 13, 4:47 PM EST | Mesoscale Discussion | SPC | 118 min |
| Dec 13, 5:42 PM EST | Dense Fog Advisory | TAE | 8 hr |
| Dec 17, 7:54 AM EST | Tornado Watch | SPC | 7 hr |
| Dec 17, 10:29 AM EST | Mesoscale Discussion | SPC | 91 min |
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 | 18 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.