Alert archive / Florida / Seminole County
Weather alerts in Seminole County, Florida, 2024
183 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 183
- Warnings
- 33
- Watches
- 15
- Advisories
- 48
- Busiest month
- August35 alerts
- Busiest day
- August 4, 202413 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 3 tornado warnings covering Seminole County in 2024 had a tornado report inside them.
Seminole County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 14 | 8 | 43% | 6 | 50% | 14 min |
| Flash flood warnings | 6 | 3 | 50% | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Melbourne, FL: tornado warnings | 65 | 23 | 65% | 37 | 86% | 20 min |
| NWS Melbourne, FL: severe thunderstorm warnings | 86 | 17 | 80% | 89 | 33% | 12 min |
| NWS Melbourne, FL: flash flood warnings | 9 | 4 | 56% | 5 | 100% | 170 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 1, 5:34 AM EST | Dense Fog Advisory | MLB | 3 hr |
| Jan 8, 1:17 PM EST | Wind Advisory | MLB | 30 hr |
| Jan 9, 12:42 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 9, 1:15 PM EST | Tornado Watch | SPC | 7 hr |
| Jan 9, 5:21 PM EST | Severe Thunderstorm Warning | MLB | 39 min |
| Jan 9, 5:55 PM EST | Severe Thunderstorm Warning | MLB | 50 min |
| Jan 9, 6:08 PM EST | Tornado Warning | MLB | 37 min |
| Jan 9, 6:24 PM EST | Severe Thunderstorm Warning | MLB | 51 min |
| Jan 16, 12:35 AM EST | Dense Fog Advisory | MLB | 9 hr |
| Jan 16, 11:17 AM EST | Mesoscale Discussion | SPC | 118 min |
| Jan 16, 3:07 PM EST | Wind Chill Advisory | MLB | 18 hr |
| Jan 20, 1:56 AM EST | Wind Chill Advisory | MLB | 30 hr |
| Feb 4, 6:57 PM EST | Severe Thunderstorm Warning | MLB | 33 min |
| Feb 4, 7:24 PM EST | Severe Thunderstorm Warning | MLB | 36 min |
| Feb 4, 7:56 PM EST | Special Weather Statement | MLB | 34 min |
| Feb 4, 8:04 PM EST | Severe Thunderstorm Warning | MLB | 41 min |
| Mar 3, 6:31 PM EST | Special Weather Statement | MLB | 29 min |
| Mar 3, 11:45 PM EST | Dense Fog Advisory | MLB | 9 hr |
| Mar 18, 1:55 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 2:25 PM EDT | Wind Advisory | MLB | 30 hr |
| Apr 3, 10:43 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 3, 1:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 3, 2:43 PM EDT | Special Weather Statement | MLB | 47 min |
| Apr 3, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 3, 3:29 PM EDT | Special Weather Statement | MLB | 46 min |
| Apr 3, 4:01 PM EDT | Special Weather Statement | MLB | 44 min |
| Apr 3, 9:10 PM EDT | Special Weather Statement | MLB | 35 min |
| Apr 10, 1:03 PM EDT | Wind Advisory | MLB | 31 hr |
| Apr 11, 7:32 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 11, 12:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 1:40 PM EDT | Special Weather Statement | MLB | 35 min |
| Apr 11, 1:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 11, 2:21 PM EDT | Special Weather Statement | MLB | 39 min |
| Apr 11, 2:58 PM EDT | Special Weather Statement | MLB | 47 min |
| May 10, 8:17 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 2:08 AM EDT | Severe Thunderstorm Warning | MLB | 37 min |
| May 13, 4:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 14, 8:43 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 14, 10:30 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 12:12 PM EDT | Severe Thunderstorm Warning | MLB | 33 min |
| May 14, 12:42 PM EDT | Special Weather Statement | MLB | 33 min |
| May 15, 1:45 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 2:47 AM EDT | Tornado Watch | SPC | 8 hr |
| May 15, 4:58 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 15, 7:01 AM EDT | Special Weather Statement | MLB | 44 min |
| May 15, 8:29 AM EDT | Special Weather Statement | MLB | 31 min |
| May 15, 8:36 AM EDT | Mesoscale Discussion | SPC | 84 min |
| May 15, 10:52 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 15, 1:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 15, 2:37 PM EDT | Special Weather Statement | MLB | 23 min |
| May 15, 2:41 PM EDT | Special Weather Statement | MLB | 34 min |
| May 17, 10:23 AM EDT | Special Weather Statement | MLB | 37 min |
| May 18, 2:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 18, 3:29 PM EDT | Severe Thunderstorm Warning | MLB | 31 min |
| May 18, 4:41 PM EDT | Special Weather Statement | MLB | 64 min |
| May 28, 1:43 PM EDT | Special Weather Statement | MLB | 32 min |
| May 28, 4:23 PM EDT | Special Weather Statement | MLB | 37 min |
| Jun 6, 3:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 6, 6:13 PM EDT | Special Weather Statement | MLB | 32 min |
| Jun 6, 6:48 PM EDT | Special Weather Statement | MLB | 27 min |
| Jun 6, 6:59 PM EDT | Severe Thunderstorm Warning | MLB | 31 min |
| Jun 6, 7:13 PM EDT | Tornado Warning | MLB | 17 min |
| Jun 6, 7:26 PM EDT | Severe Thunderstorm Warning | MLB | 34 min |
| Jun 6, 7:43 PM EDT | Special Weather Statement | MLB | 47 min |
| Jun 6, 7:48 PM EDT | Areal Flood Advisory | MLB | 2 hr |
| Jun 6, 7:54 PM EDT | Special Weather Statement | MLB | 36 min |
| Jun 10, 7:09 PM EDT | Special Weather Statement | MLB | 51 min |
| Jun 10, 8:13 PM EDT | Special Weather Statement | MLB | 47 min |
| Jun 10, 8:53 PM EDT | Areal Flood Advisory | MLB | 112 min |
| Jun 10, 8:57 PM EDT | Special Weather Statement | MLB | 48 min |
| Jun 13, 2:40 PM EDT | Special Weather Statement | MLB | 20 min |
| Jun 13, 2:42 PM EDT | Special Weather Statement | MLB | 33 min |
| Jun 13, 3:06 PM EDT | Special Weather Statement | MLB | 24 min |
| Jun 26, 6:27 PM EDT | Special Weather Statement | MLB | 48 min |
| Jun 26, 7:21 PM EDT | Areal Flood Advisory | MLB | 79 min |
| Jun 26, 7:48 PM EDT | Areal Flood Advisory | MLB | 87 min |
| Jul 4, 1:51 AM EDT | Heat Advisory | MLB | 16 hr |
| Jul 5, 2:13 AM EDT | Heat Advisory | MLB | 16 hr |
| Jul 8, 3:59 AM EDT | Heat Advisory | MLB | 14 hr |
| Jul 9, 2:42 PM EDT | Special Weather Statement | MLB | 33 min |
| Jul 10, 3:14 AM EDT | Heat Advisory | MLB | 15 hr |
| Jul 13, 5:45 PM EDT | Special Weather Statement | MLB | 45 min |
| Jul 14, 4:32 PM EDT | Special Weather Statement | MLB | 28 min |
| Jul 16, 3:58 PM EDT | Special Weather Statement | MLB | 32 min |
| Jul 16, 4:27 PM EDT | Severe Thunderstorm Warning | MLB | 33 min |
| Jul 16, 4:36 PM EDT | Special Weather Statement | MLB | 24 min |
| Jul 16, 4:55 PM EDT | Special Weather Statement | MLB | 35 min |
| Jul 21, 6:08 PM EDT | Areal Flood Advisory | MLB | 82 min |
| Jul 23, 5:21 PM EDT | Areal Flood Advisory | MLB | 84 min |
| Jul 27, 4:59 PM EDT | Areal Flood Advisory | MLB | 2 hr |
| Jul 27, 5:01 PM EDT | Areal Flood Advisory | MLB | 119 min |
| Aug 1, 3:25 AM EDT | Heat Advisory | MLB | 15 hr |
| Aug 2, 1:32 AM EDT | Heat Advisory | MLB | 16 hr |
| Aug 2, 6:14 PM EDT | Special Weather Statement | MLB | 31 min |
| Aug 4, 10:57 AM EDT | Tornado Watch | SPC | 9 hr |
| Aug 4, 12:02 PM EDT | Special Weather Statement | MLB | 28 min |
| Aug 4, 12:28 PM EDT | Special Weather Statement | MLB | 32 min |
| Aug 4, 12:45 PM EDT | Severe Thunderstorm Warning | MLB | 30 min |
| Aug 4, 1:32 PM EDT | Special Weather Statement | MLB | 28 min |
| Aug 4, 1:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 4, 1:57 PM EDT | Special Weather Statement | MLB | 33 min |
| Aug 4, 2:19 PM EDT | Severe Thunderstorm Warning | MLB | 11 min |
| Aug 4, 4:51 PM EDT | Special Weather Statement | MLB | 24 min |
| Aug 4, 4:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 4, 6:45 PM EDT | Special Weather Statement | MLB | 45 min |
| Aug 4, 7:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 4, 7:57 PM EDT | Tornado Watch | SPC | 10 hr |
| Aug 5, 1:32 AM EDT | Wind Advisory | MLB | 17 hr |
| Aug 5, 5:57 AM EDT | Tornado Watch | SPC | 12 hr |
| Aug 5, 12:08 PM EDT | Mesoscale Discussion | SPC | 52 min |
| Aug 6, 6:37 AM EDT | Special Weather Statement | MLB | 23 min |
| Aug 6, 6:44 AM EDT | Tornado Warning | MLB | 16 min |
| Aug 6, 7:02 AM EDT | Special Weather Statement | MLB | 28 min |
| Aug 6, 7:24 AM EDT | Special Weather Statement | MLB | 36 min |
| Aug 8, 2:14 AM EDT | Heat Advisory | MLB | 16 hr |
| Aug 9, 2:33 AM EDT | Heat Advisory | MLB | 15 hr |
| Aug 10, 3:19 AM EDT | Heat Advisory | MLB | 16 hr |
| Aug 11, 3:22 PM EDT | Special Weather Statement | MLB | 23 min |
| Aug 11, 4:04 PM EDT | Special Weather Statement | MLB | 26 min |
| Aug 12, 4:24 PM EDT | Special Weather Statement | MLB | 36 min |
| Aug 14, 2:14 AM EDT | Heat Advisory | MLB | 16 hr |
| Aug 20, 1:18 PM EDT | Special Weather Statement | MLB | 57 min |
| Aug 21, 11:35 AM EDT | Special Weather Statement | MLB | 25 min |
| Aug 22, 3:21 PM EDT | Special Weather Statement | MLB | 24 min |
| Aug 22, 4:19 PM EDT | Areal Flood Advisory | MLB | 116 min |
| Aug 28, 4:10 PM EDT | Areal Flood Advisory | MLB | 95 min |
| Sep 1, 3:31 PM EDT | Special Weather Statement | MLB | 29 min |
| Sep 1, 4:18 PM EDT | Areal Flood Advisory | MLB | 117 min |
| Sep 1, 5:35 PM EDT | Areal Flood Advisory | MLB | 85 min |
| Sep 3, 4:46 PM EDT | Areal Flood Advisory | MLB | 2 hr |
| Sep 4, 2:52 PM EDT | Special Weather Statement | MLB | 23 min |
| Sep 4, 3:23 PM EDT | Areal Flood Advisory | MLB | 112 min |
| Sep 4, 3:46 PM EDT | River Flood Warning | MLB | 3 hr |
| Sep 4, 4:08 PM EDT | Areal Flood Warning | MLB | 2 hr |
| Sep 4, 11:25 PM EDT | Areal Flood Advisory | MLB | 95 min |
| Sep 5, 1:36 AM EDT | Areal Flood Advisory | MLB | 84 min |
| Sep 5, 6:50 PM EDT | Areal Flood Warning | MLB | 115 min |
| Sep 7, 4:49 PM EDT | Areal Flood Advisory | MLB | 86 min |
| Sep 8, 5:18 PM EDT | Special Weather Statement | MLB | 42 min |
| Sep 8, 7:07 PM EDT | Areal Flood Advisory | MLB | 113 min |
| Sep 8, 7:51 PM EDT | Areal Flood Advisory | MLB | 114 min |
| Sep 9, 2:33 PM EDT | Areal Flood Advisory | MLB | 117 min |
| Sep 11, 2:20 PM EDT | Areal Flood Advisory | MLB | 3 hr |
| Sep 14, 7:42 AM EDT | Dense Fog Advisory | MLB | 80 min |
| Sep 14, 4:14 PM EDT | Areal Flood Advisory | MLB | 2 hr |
| Sep 17, 6:22 PM EDT | Special Weather Statement | MLB | 38 min |
| Sep 24, 5:08 AM EDT | Tropical Storm Watch | MLB | 18 hr |
| Sep 24, 5:06 PM EDT | Tropical Storm Warning | MLB | 60 hr |
| Sep 25, 1:40 PM EDT | Flood Watch | MLB | 37 hr |
| Sep 26, 6:42 AM EDT | Tornado Watch | SPC | 13 hr |
| Sep 26, 9:07 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 26, 12:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 26, 7:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 26, 7:50 PM EDT | Tornado Watch | SPC | 9 hr |
| Sep 27, 4:59 AM EDT | Wind Advisory | MLB | 6 hr |
| Oct 1, 7:07 PM EDT | Special Weather Statement | MLB | 38 min |
| Oct 5, 12:44 PM EDT | Flood Watch | MLB | 5 days |
| Oct 7, 10:58 AM EDT | Hurricane Watch | MLB | 66 hr |
| Oct 7, 5:07 PM EDT | Hurricane Warning | MLB | 69 hr |
| Oct 7, 5:07 PM EDT | Tropical Storm Warning | MLB | 72 hr |
| Oct 9, 8:20 AM EDT | Tornado Watch | SPC | 13 hr |
| Oct 9, 1:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Oct 9, 2:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Oct 9, 3:57 PM EDT | Flash Flood Warning | MLB | 3 hr |
| Oct 9, 6:43 PM EDT | Flash Flood Warning | MLB | 5 hr |
| Oct 9, 11:01 PM EDT | Flash Flood Warning | MLB | 3 hr |
| Oct 9, 11:14 PM EDT | River Flood Warning | MLB | 5 days |
| Oct 9, 11:41 PM EDT | Flash Flood Warning | MLB | 6 hr |
| Oct 10, 1:34 AM EDT | Flash Flood Warning | MLB | 3 hr |
| Oct 10, 1:52 AM EDT | River Flood Warning | MLB | 33 days |
| Oct 10, 5:53 AM EDT | Flash Flood Warning | MLB | 3 hr |
| Oct 10, 9:01 AM EDT | Areal Flood Warning | MLB | 3 hr |
| Oct 10, 10:03 AM EDT | River Flood Warning | MLB | 30 days |
| Oct 10, 10:53 AM EDT | Wind Advisory | MLB | 9 hr |
| Dec 11, 11:43 AM EST | Mesoscale Discussion | SPC | 92 min |
| Dec 11, 1:28 PM EST | Special Weather Statement | MLB | 32 min |
| Dec 11, 1:54 PM EST | Special Weather Statement | MLB | 36 min |
| Dec 18, 10:59 PM EST | Dense Fog Advisory | MLB | 11 hr |
| Dec 20, 1:53 AM EST | Dense Fog Advisory | MLB | 7 hr |
| Dec 26, 3:22 AM EST | Dense Fog Advisory | MLB | 4 hr |
| Dec 29, 2:12 PM EST | Special Weather Statement | MLB | 48 min |
| Dec 29, 2:53 PM EST | Special Weather Statement | MLB | 37 min |
| Dec 30, 3:32 PM EST | Dense Fog Advisory | MLB | 17 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 | 14 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 10 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 60 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 6 |
| River Flood Warning | 4 |
| Flood Watch | 2 |
| Areal Flood Advisory | 22 |
| Heat | |
| Heat Advisory | 10 |
| Cold | |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Tropical | |
| Hurricane Warning | 1 |
| Tropical Storm Warning | 2 |
| Hurricane Watch | 1 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.