Alert archive / Georgia / Glynn County
Weather alerts in Glynn County, Georgia, 2020
195 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Glynn County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 195
- Warnings
- 48
- Watches
- 22
- Advisories
- 38
- Busiest month
- September31 alerts
- Busiest day
- April 20, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 5 tornado warnings covering Glynn County in 2020 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 44 minutes after it went out.
Glynn County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 3 | 40% | 2 | 100% | 44 min |
| Severe thunderstorm warnings | 20 | 11 | 45% | 7 | 71% | 22 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jacksonville, FL: tornado warnings | 44 | 11 | 75% | 34 | 53% | 19 min |
| NWS Jacksonville, FL: severe thunderstorm warnings | 236 | 83 | 65% | 300 | 68% | 26 min |
| NWS Jacksonville, FL: flash flood warnings | 19 | 5 | 74% | 14 | 86% | 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 3, 8:46 AM EST | River Flood Warning | JAX | 49 hr |
| Jan 5, 1:53 PM EST | Frost Advisory | JAX | 18 hr |
| Jan 9, 1:48 AM EST | Frost Advisory | JAX | 7 hr |
| Jan 12, 9:32 PM EST | Dense Fog Advisory | JAX | 12 hr |
| Jan 15, 1:09 AM EST | Dense Fog Advisory | JAX | 8 hr |
| Jan 19, 1:59 PM EST | Freeze Watch | JAX | 24 hr |
| Jan 20, 2:25 PM EST | Wind Chill Advisory | JAX | 19 hr |
| Jan 20, 2:26 PM EST | Freeze Warning | JAX | 19 hr |
| Jan 21, 3:44 AM EST | Freeze Watch | JAX | 5 hr |
| Jan 21, 8:55 AM EST | Wind Chill Advisory | JAX | 23 hr |
| Jan 21, 8:56 AM EST | Freeze Warning | JAX | 23 hr |
| Jan 21, 1:57 PM EST | Hard Freeze Warning | JAX | 18 hr |
| Feb 6, 2:09 AM EST | Wind Advisory | JAX | 22 hr |
| Feb 6, 5:30 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 6, 7:32 PM EST | Mesoscale Discussion | SPC | 118 min |
| Feb 6, 7:58 PM EST | Severe Thunderstorm Warning | JAX | 47 min |
| Feb 6, 9:07 PM EST | Severe Thunderstorm Warning | JAX | 38 min |
| Feb 6, 9:18 PM EST | Severe Thunderstorm Warning | JAX | 42 min |
| Feb 6, 9:28 PM EST | Severe Thunderstorm Warning | JAX | 47 min |
| Feb 6, 9:54 PM EST | Severe Thunderstorm Warning | JAX | 51 min |
| Feb 7, 3:29 AM EST | Wind Advisory | JAX | 10 hr |
| Feb 7, 1:52 PM EST | Frost Advisory | JAX | 19 hr |
| Feb 13, 8:14 PM EST | River Flood Warning | JAX | 40 days |
| Feb 17, 1:52 AM EST | Dense Fog Advisory | JAX | 6 hr |
| Feb 20, 3:15 PM EST | Freeze Watch | JAX | 19 hr |
| Feb 20, 3:15 PM EST | Wind Advisory | JAX | 29 hr |
| Feb 21, 1:24 AM EST | Rip Current Statement | JAX | 72 hr |
| Feb 21, 3:25 AM EST | Coastal Flood Statement | JAX | 13 hr |
| Feb 21, 9:56 AM EST | Freeze Warning | JAX | 23 hr |
| Feb 22, 1:49 AM EST | Coastal Flood Statement | JAX | 20 hr |
| Feb 22, 2:00 AM EST | Freeze Watch | JAX | 12 hr |
| Feb 22, 2:25 PM EST | Frost Advisory | JAX | 18 hr |
| Feb 26, 1:29 PM EST | Freeze Watch | JAX | 26 hr |
| Feb 27, 3:07 PM EST | Freeze Warning | JAX | 17 hr |
| Feb 29, 12:55 AM EST | Freeze Watch | JAX | 13 hr |
| Feb 29, 1:05 PM EST | Wind Advisory | JAX | 3 hr |
| Feb 29, 2:17 PM EST | Frost Advisory | JAX | 18 hr |
| Feb 29, 2:17 PM EST | Freeze Warning | JAX | 18 hr |
| Mar 4, 10:16 AM EST | Tornado Watch | SPC | 6 hr |
| Mar 4, 11:30 AM EST | Severe Thunderstorm Warning | JAX | 30 min |
| Mar 4, 12:34 PM EST | Mesoscale Discussion | SPC | 86 min |
| Mar 4, 2:23 PM EST | Special Weather Statement | JAX | 22 min |
| Mar 5, 3:58 PM EST | Severe Thunderstorm Warning | JAX | 28 min |
| Mar 5, 4:10 PM EST | Severe Thunderstorm Warning | JAX | 50 min |
| Mar 31, 2:22 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 6, 4:04 AM EDT | Dense Fog Advisory | JAX | 5 hr |
| Apr 7, 2:57 AM EDT | Coastal Flood Statement | JAX | 47 hr |
| Apr 8, 9:45 PM EDT | Special Weather Statement | JAX | 45 min |
| Apr 12, 4:25 AM EDT | Rip Current Statement | JAX | 40 hr |
| Apr 13, 3:20 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 13, 6:17 AM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 13, 7:09 AM EDT | Severe Thunderstorm Warning | JAX | 66 min |
| Apr 13, 8:15 AM EDT | Severe Thunderstorm Warning | JAX | 45 min |
| Apr 13, 8:44 AM EDT | Severe Thunderstorm Warning | JAX | 47 min |
| Apr 13, 9:08 AM EDT | Severe Thunderstorm Warning | JAX | 67 min |
| Apr 14, 10:14 AM EDT | Special Weather Statement | JAX | 46 min |
| Apr 14, 11:00 AM EDT | Special Weather Statement | JAX | 45 min |
| Apr 19, 9:10 PM EDT | Special Weather Statement | JAX | 20 min |
| Apr 20, 1:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 20, 2:19 AM EDT | Tornado Watch | SPC | 9 hr |
| Apr 20, 2:59 AM EDT | Severe Thunderstorm Warning | JAX | 46 min |
| Apr 20, 3:35 AM EDT | Severe Thunderstorm Warning | JAX | 40 min |
| Apr 20, 4:58 AM EDT | Special Weather Statement | JAX | 32 min |
| Apr 20, 5:10 AM EDT | Severe Thunderstorm Warning | JAX | 24 min |
| Apr 20, 5:23 AM EDT | Special Weather Statement | JAX | 52 min |
| Apr 20, 5:34 AM EDT | Severe Thunderstorm Warning | JAX | 30 min |
| Apr 20, 6:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 23, 9:17 AM EDT | River Flood Warning | JAX | 16 days |
| Apr 23, 10:29 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 23, 10:52 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 23, 2:15 PM EDT | Tornado Warning | JAX | 45 min |
| Apr 23, 2:45 PM EDT | Tornado Warning | JAX | 30 min |
| Apr 23, 2:52 PM EDT | Tornado Warning | JAX | 38 min |
| Apr 23, 3:21 PM EDT | Tornado Warning | JAX | 54 min |
| Apr 23, 8:46 PM EDT | Special Weather Statement | JAX | 44 min |
| May 13, 2:16 AM EDT | Rip Current Statement | JAX | 5 days |
| May 20, 10:12 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 2:16 AM EDT | Rip Current Statement | JAX | 25 hr |
| May 21, 2:48 PM EDT | Special Weather Statement | JAX | 57 min |
| May 21, 3:42 PM EDT | Special Weather Statement | JAX | 48 min |
| May 21, 4:30 PM EDT | Special Weather Statement | JAX | 30 min |
| May 21, 4:31 PM EDT | Special Weather Statement | JAX | 14 min |
| May 21, 4:33 PM EDT | Severe Thunderstorm Warning | JAX | 28 min |
| May 25, 2:29 AM EDT | Rip Current Statement | JAX | 42 hr |
| Jun 1, 2:21 AM EDT | Rip Current Statement | JAX | 42 hr |
| Jun 12, 4:18 PM EDT | Special Weather Statement | JAX | 42 min |
| Jun 12, 5:44 PM EDT | Areal Flood Warning | JAX | 2 hr |
| Jun 13, 2:00 AM EDT | Flash Flood Watch | JAX | 24 hr |
| Jun 13, 3:17 PM EDT | Special Weather Statement | JAX | 43 min |
| Jun 19, 3:48 PM EDT | Special Weather Statement | JAX | 57 min |
| Jun 20, 3:54 PM EDT | Special Weather Statement | JAX | 51 min |
| Jun 20, 4:48 PM EDT | Special Weather Statement | JAX | 42 min |
| Jun 20, 6:04 PM EDT | Special Weather Statement | JAX | 41 min |
| Jun 24, 6:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 6, 12:31 PM EDT | Special Weather Statement | JAX | 59 min |
| Jul 6, 1:29 PM EDT | Special Weather Statement | JAX | 46 min |
| Jul 6, 2:15 PM EDT | Special Weather Statement | JAX | 30 min |
| Jul 11, 1:53 AM EDT | Heat Advisory | JAX | 14 hr |
| Jul 31, 3:14 AM EDT | Rip Current Statement | JAX | 4 days |
| Jul 31, 5:05 PM EDT | Tropical Storm Watch | JAX | 36 hr |
| Aug 1, 10:50 AM EDT | Coastal Flood Advisory | JAX | 48 hr |
| Aug 1, 10:52 AM EDT | Tropical Storm Warning | JAX | 51 hr |
| Aug 3, 5:11 AM EDT | High Surf Advisory | JAX | 11 hr |
| Aug 3, 11:15 PM EDT | Special Weather Statement | JAX | 15 min |
| Aug 7, 2:26 PM EDT | Special Weather Statement | JAX | 49 min |
| Aug 7, 3:47 PM EDT | Special Weather Statement | JAX | 58 min |
| Aug 7, 4:58 PM EDT | Special Weather Statement | JAX | 17 min |
| Aug 9, 6:08 PM EDT | Special Weather Statement | JAX | 37 min |
| Aug 9, 6:15 PM EDT | Severe Thunderstorm Warning | JAX | 45 min |
| Aug 9, 6:27 PM EDT | Tornado Warning | JAX | 9 min |
| Aug 9, 6:39 PM EDT | Special Weather Statement | JAX | 51 min |
| Aug 10, 5:30 PM EDT | Special Weather Statement | JAX | 30 min |
| Aug 13, 4:38 PM EDT | Special Weather Statement | JAX | 52 min |
| Aug 13, 6:31 PM EDT | Special Weather Statement | JAX | 89 min |
| Aug 13, 7:00 PM EDT | Areal Flood Warning | JAX | 3 hr |
| Aug 18, 7:24 PM EDT | Special Weather Statement | JAX | 51 min |
| Aug 18, 8:11 PM EDT | Areal Flood Warning | JAX | 3 hr |
| Aug 20, 1:58 PM EDT | Special Weather Statement | JAX | 62 min |
| Aug 23, 8:52 AM EDT | Special Weather Statement | JAX | 23 min |
| Aug 24, 2:43 AM EDT | Rip Current Statement | JAX | 41 hr |
| Aug 31, 6:12 PM EDT | Special Weather Statement | JAX | 48 min |
| Sep 6, 8:44 PM EDT | Special Weather Statement | JAX | 61 min |
| Sep 6, 11:57 PM EDT | Special Weather Statement | JAX | 48 min |
| Sep 7, 12:44 AM EDT | Special Weather Statement | JAX | 46 min |
| Sep 12, 2:16 AM EDT | Rip Current Statement | JAX | 4 days |
| Sep 13, 11:45 AM EDT | Special Weather Statement | JAX | 45 min |
| Sep 13, 12:52 PM EDT | Special Weather Statement | JAX | 38 min |
| Sep 13, 1:53 PM EDT | Special Weather Statement | JAX | 52 min |
| Sep 15, 1:16 PM EDT | Special Weather Statement | JAX | 59 min |
| Sep 15, 2:20 PM EDT | Special Weather Statement | JAX | 40 min |
| Sep 15, 2:51 PM EDT | Coastal Flood Statement | JAX | 29 hr |
| Sep 15, 2:51 PM EDT | Coastal Flood Advisory | JAX | 7 hr |
| Sep 15, 2:58 PM EDT | Special Weather Statement | JAX | 47 min |
| Sep 15, 3:29 PM EDT | Areal Flood Warning | JAX | 6 hr |
| Sep 15, 9:27 PM EDT | Rip Current Statement | JAX | 47 hr |
| Sep 16, 1:19 AM EDT | Special Weather Statement | JAX | 41 min |
| Sep 16, 2:05 AM EDT | Areal Flood Warning | JAX | 3 hr |
| Sep 16, 2:29 AM EDT | Flash Flood Warning | JAX | 3 hr |
| Sep 16, 11:56 AM EDT | Special Weather Statement | JAX | 49 min |
| Sep 16, 7:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 16, 8:54 PM EDT | Special Weather Statement | JAX | 36 min |
| Sep 16, 8:55 PM EDT | Coastal Flood Statement | JAX | 54 hr |
| Sep 18, 4:11 AM EDT | Coastal Flood Advisory | JAX | 47 hr |
| Sep 18, 4:11 AM EDT | Rip Current Statement | JAX | 8 days |
| Sep 18, 4:07 PM EDT | Coastal Flood Watch | JAX | 11 hr |
| Sep 18, 4:07 PM EDT | High Surf Advisory | JAX | 5 days |
| Sep 19, 2:29 AM EDT | Wind Advisory | JAX | 66 hr |
| Sep 19, 2:58 AM EDT | Coastal Flood Warning | JAX | 63 hr |
| Sep 21, 2:51 PM EDT | Coastal Flood Advisory | JAX | 4 days |
| Sep 23, 2:21 AM EDT | Coastal Flood Statement | JAX | 6 hr |
| Sep 27, 4:18 AM EDT | Dense Fog Advisory | JAX | 5 hr |
| Sep 29, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 4:54 AM EDT | Dense Fog Advisory | JAX | 5 hr |
| Oct 8, 4:02 AM EDT | Dense Fog Advisory | JAX | 5 hr |
| Oct 9, 2:51 AM EDT | Dense Fog Advisory | JAX | 6 hr |
| Oct 15, 2:22 PM EDT | Coastal Flood Statement | JAX | 36 hr |
| Oct 16, 7:47 AM EDT | Dense Fog Advisory | JAX | 2 hr |
| Oct 16, 2:30 PM EDT | Coastal Flood Advisory | JAX | 6 days |
| Oct 17, 2:29 AM EDT | Rip Current Statement | JAX | 9 days |
| Oct 26, 5:30 AM EDT | Dense Fog Advisory | JAX | 4 hr |
| Oct 29, 2:43 PM EDT | Special Weather Statement | JAX | 17 min |
| Oct 31, 2:37 AM EDT | Rip Current Statement | JAX | 25 hr |
| Nov 5, 2:30 AM EST | Rip Current Statement | JAX | 8 days |
| Nov 7, 3:23 PM EST | Coastal Flood Watch | JAX | 23 hr |
| Nov 11, 2:36 AM EST | Coastal Flood Statement | JAX | 66 hr |
| Nov 13, 8:48 PM EST | Coastal Flood Advisory | JAX | 4 days |
| Nov 17, 9:24 AM EST | Coastal Flood Statement | JAX | 28 hr |
| Nov 18, 3:22 AM EST | Coastal Flood Advisory | JAX | 10 hr |
| Nov 18, 8:45 PM EST | Coastal Flood Statement | JAX | 67 hr |
| Nov 30, 5:39 AM EST | Special Weather Statement | JAX | 51 min |
| Nov 30, 6:25 AM EST | Special Weather Statement | JAX | 20 min |
| Nov 30, 6:46 AM EST | Special Weather Statement | JAX | 29 min |
| Nov 30, 3:49 PM EST | Freeze Watch | JAX | 10 hr |
| Dec 1, 1:53 AM EST | Freeze Warning | JAX | 30 hr |
| Dec 2, 2:46 PM EST | Frost Advisory | JAX | 17 hr |
| Dec 8, 2:33 AM EST | Frost Advisory | JAX | 30 hr |
| Dec 8, 8:05 PM EST | Freeze Warning | JAX | 13 hr |
| Dec 13, 12:18 AM EST | Dense Fog Advisory | JAX | 10 hr |
| Dec 15, 3:57 AM EST | Coastal Flood Statement | JAX | 3 hr |
| Dec 15, 7:06 AM EST | Coastal Flood Advisory | JAX | 4 hr |
| Dec 17, 11:39 AM EST | Freeze Warning | JAX | 21 hr |
| Dec 18, 1:35 PM EST | Frost Advisory | JAX | 18 hr |
| Dec 23, 2:45 PM EST | Freeze Watch | JAX | 23 hr |
| Dec 24, 3:36 AM EST | Freeze Watch | JAX | 23 hr |
| Dec 24, 3:36 AM EST | Hard Freeze Watch | JAX | 23 hr |
| Dec 24, 1:41 PM EST | Wind Chill Advisory | JAX | 19 hr |
| Dec 24, 1:50 PM EST | Freeze Warning | JAX | 19 hr |
| Dec 24, 4:28 PM EST | Mesoscale Discussion | SPC | 92 min |
| Dec 24, 5:33 PM EST | Severe Thunderstorm Warning | JAX | 57 min |
| Dec 24, 6:28 PM EST | Severe Thunderstorm Warning | JAX | 62 min |
| Dec 24, 9:31 PM EST | Special Weather Statement | JAX | 2 hr |
| Dec 25, 2:16 AM EST | Hard Freeze Warning | JAX | 31 hr |
| Dec 25, 2:40 PM EST | Freeze Watch | JAX | 24 hr |
| Dec 25, 2:40 PM EST | Hard Freeze Watch | JAX | 24 hr |
| Dec 26, 2:29 PM EST | Hard Freeze Warning | JAX | 19 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 | 20 |
| Tornado Warning | 5 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 51 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 1 |
| River Flood Warning | 3 |
| Flash Flood Watch | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 9 |
| Hard Freeze Warning | 3 |
| Freeze Watch | 10 |
| Hard Freeze Watch | 2 |
| Frost Advisory | 8 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Watch | 2 |
| Coastal Flood Advisory | 8 |
| High Surf Advisory | 2 |
| Coastal Flood Statement | 11 |
| Rip Current Statement | 14 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.