Alert archive / Georgia / Effingham County
Weather alerts in Effingham County, Georgia, 2021
93 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Effingham County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 93
- Warnings
- 16
- Watches
- 14
- Advisories
- 29
- Busiest month
- June25 alerts
- Busiest day
- June 28, 20218 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 2 tornado reports fell inside a warning.
Effingham County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 2 | 0% | |||
| Severe thunderstorm warnings | 5 | 3 | 40% | 9 | 0% | |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 15 | 2 | 87% | 6 | 50% | 6 min |
| NWS Charleston, SC: severe thunderstorm warnings | 53 | 30 | 43% | 126 | 40% | 19 min |
| NWS Charleston, SC: flash flood warnings | 1 | 1 | 0% | 3 | 33% | 8 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 |
|---|---|---|---|
| Dec 31, 9:28 PM EST | Dense Fog Advisory | CHS | 13 hr |
| Jan 2, 12:30 PM EST | Flash Flood Watch | CHS | 12 hr |
| Jan 2, 10:34 PM EST | River Flood Warning | CHS | 20 days |
| Jan 15, 8:35 PM EST | Dense Fog Advisory | CHS | 3 hr |
| Jan 23, 12:37 AM EST | Dense Fog Advisory | CHS | 7 hr |
| Jan 27, 9:12 AM EST | Special Weather Statement | CHS | 33 min |
| Jan 27, 9:24 AM EST | Severe Thunderstorm Warning | CHS | 51 min |
| Feb 1, 8:57 AM EST | River Flood Warning | CHS | 41 days |
| Feb 11, 6:28 PM EST | Dense Fog Advisory | CHS | 16 hr |
| Feb 15, 7:01 PM EST | Severe Thunderstorm Warning | CHS | 29 min |
| Feb 17, 9:23 PM EST | River Flood Warning | CHS | 25 days |
| Feb 18, 3:38 AM EST | Dense Fog Advisory | CHS | 4 hr |
| Feb 18, 7:15 AM EST | Flash Flood Watch | CHS | 20 hr |
| Mar 7, 3:12 AM EST | Freeze Watch | CHS | 12 hr |
| Mar 7, 3:22 PM EST | Freeze Warning | CHS | 17 hr |
| Mar 8, 12:58 PM EST | Freeze Warning | CHS | 19 hr |
| Mar 18, 11:05 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Mar 18, 11:42 AM EDT | Tornado Watch | SPC | 6 hr |
| Mar 26, 1:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Mar 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Mar 31, 6:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 1, 11:15 AM EDT | River Flood Warning | CHS | 21 days |
| Apr 2, 8:28 AM EDT | Freeze Watch | CHS | 6 hr |
| Apr 2, 8:28 AM EDT | Freeze Warning | CHS | 25 hr |
| Apr 20, 3:19 PM EDT | Fire Weather Watch | CHS | 10 hr |
| Apr 21, 1:44 AM EDT | Red Flag Warning | CHS | 18 hr |
| May 6, 3:00 PM EDT | Fire Weather Watch | CHS | 12 hr |
| May 7, 3:05 AM EDT | Red Flag Warning | CHS | 16 hr |
| Jun 3, 2:23 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Jun 3, 4:24 PM EDT | Special Weather Statement | CHS | 36 min |
| Jun 3, 4:56 PM EDT | Special Weather Statement | CHS | 34 min |
| Jun 3, 5:42 PM EDT | Areal Flood Advisory | CHS | 93 min |
| Jun 7, 3:40 PM EDT | Areal Flood Advisory | CHS | 53 min |
| Jun 8, 8:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Jun 8, 8:57 PM EDT | Special Weather Statement | CHS | 33 min |
| Jun 9, 4:04 PM EDT | Areal Flood Advisory | CHS | 86 min |
| Jun 12, 1:14 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 12, 5:58 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Jun 12, 7:02 PM EDT | Areal Flood Advisory | CHS | 118 min |
| Jun 15, 10:18 PM EDT | Special Weather Statement | CHS | 27 min |
| Jun 15, 10:26 PM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Jun 16, 1:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 20, 2:58 AM EDT | Flash Flood Watch | CHS | 24 hr |
| Jun 20, 8:40 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 20, 9:38 PM EDT | Special Weather Statement | CHS | 37 min |
| Jun 28, 4:24 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Jun 28, 4:44 PM EDT | Special Weather Statement | CHS | 31 min |
| Jun 28, 4:59 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Jun 28, 5:18 PM EDT | Special Weather Statement | CHS | 27 min |
| Jun 28, 5:44 PM EDT | Special Weather Statement | CHS | 31 min |
| Jun 28, 6:19 PM EDT | Special Weather Statement | CHS | 26 min |
| Jun 28, 6:29 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Jun 28, 6:42 PM EDT | Special Weather Statement | CHS | 33 min |
| Jul 7, 12:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 1:04 PM EDT | Tornado Watch | SPC | 7 hr |
| Jul 7, 4:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 7, 6:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 7:25 PM EDT | Tornado Watch | SPC | 11 hr |
| Jul 7, 9:23 PM EDT | Areal Flood Advisory | CHS | 82 min |
| Jul 7, 10:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 10:39 PM EDT | Areal Flood Advisory | CHS | 81 min |
| Jul 11, 6:46 PM EDT | Special Weather Statement | CHS | 14 min |
| Jul 11, 6:50 PM EDT | Areal Flood Advisory | CHS | 55 min |
| Jul 11, 6:58 PM EDT | Special Weather Statement | CHS | 17 min |
| Jul 11, 7:32 PM EDT | Areal Flood Advisory | CHS | 58 min |
| Jul 11, 8:20 PM EDT | Areal Flood Advisory | CHS | 49 min |
| Jul 22, 3:19 PM EDT | Severe Thunderstorm Warning | CHS | 41 min |
| Jul 29, 3:36 PM EDT | Heat Advisory | CHS | 28 hr |
| Jul 30, 8:01 PM EDT | Heat Advisory | CHS | 24 hr |
| Aug 2, 6:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 3, 3:02 AM EDT | Flash Flood Watch | CHS | 19 hr |
| Aug 6, 3:43 PM EDT | Areal Flood Advisory | CHS | 92 min |
| Aug 17, 2:58 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 18, 6:25 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Sep 9, 5:53 AM EDT | Special Weather Statement | CHS | 22 min |
| Sep 9, 6:16 AM EDT | Special Weather Statement | CHS | 29 min |
| Sep 9, 6:46 AM EDT | Special Weather Statement | CHS | 29 min |
| Sep 9, 7:19 AM EDT | Special Weather Statement | CHS | 41 min |
| Sep 20, 3:16 AM EDT | Flash Flood Watch | CHS | 36 hr |
| Sep 22, 5:02 PM EDT | Special Weather Statement | CHS | 28 min |
| Oct 3, 6:09 AM EDT | Dense Fog Advisory | CHS | 5 hr |
| Oct 5, 10:40 AM EDT | Special Weather Statement | CHS | 50 min |
| Oct 17, 10:11 AM EDT | River Flood Warning | CHS | 14 days |
| Nov 22, 3:15 AM EST | Freeze Watch | CHS | 24 hr |
| Nov 22, 4:50 AM EST | Dense Fog Advisory | CHS | 4 hr |
| Nov 23, 3:07 AM EST | Freeze Warning | CHS | 30 hr |
| Dec 5, 2:20 AM EST | Dense Fog Advisory | CHS | 7 hr |
| Dec 6, 1:04 AM EST | Dense Fog Advisory | CHS | 8 hr |
| Dec 17, 9:29 PM EST | Dense Fog Advisory | CHS | 12 hr |
| Dec 26, 9:48 PM EST | Dense Fog Advisory | CHS | 13 hr |
| Dec 30, 2:05 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Dec 30, 6:35 PM EST | Mesoscale Discussion | SPC | 115 min |
| Dec 30, 8:17 PM EST | Severe Thunderstorm Warning | CHS | 43 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 | 5 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 22 |
| Flooding | |
| River Flood Warning | 5 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 16 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 3 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.