Alert archive / Georgia / Chatham County
Weather alerts in Chatham County, Georgia, 2022
91 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chatham County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 91
- Warnings
- 18
- Watches
- 10
- Advisories
- 18
- Busiest month
- August20 alerts
- Busiest day
- August 21, 20228 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 1 tornado warnings covering Chatham County in 2022 had a tornado report inside them.
Chatham County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 16 | 8 | 50% | 21 | 38% | 15 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 16 | 8 | 50% | 33 | 79% | 27 min |
| NWS Charleston, SC: severe thunderstorm warnings | 130 | 75 | 42% | 389 | 70% | 21 min |
| NWS Charleston, SC: flash flood warnings | 7 | 4 | 43% | 13 | 62% | 356 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 2, 5:01 PM EST | Tornado Watch | SPC | 5 hr |
| Jan 2, 6:52 PM EST | Mesoscale Discussion | SPC | 113 min |
| Jan 2, 9:26 PM EST | Mesoscale Discussion | SPC | 64 min |
| Jan 2, 9:53 PM EST | Tornado Watch | SPC | 5 hr |
| Jan 3, 12:17 AM EST | Mesoscale Discussion | SPC | 118 min |
| Mar 16, 11:19 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Mar 16, 11:38 AM EDT | Special Weather Statement | CHS | 37 min |
| Mar 18, 4:18 PM EDT | Special Weather Statement | CHS | 42 min |
| Mar 19, 3:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 5, 2:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 5, 3:15 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 5, 5:21 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| Apr 5, 5:26 PM EDT | Tornado Warning | CHS | 49 min |
| Apr 5, 6:41 PM EDT | Severe Thunderstorm Warning | CHS | 49 min |
| Apr 5, 6:59 PM EDT | Special Weather Statement | CHS | 31 min |
| Apr 6, 12:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 6, 4:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 6, 4:21 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 6, 8:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 6, 10:13 PM EDT | Special Weather Statement | CHS | 47 min |
| Apr 17, 6:03 PM EDT | River Flood Warning | CHS | 21 days |
| Apr 17, 7:35 PM EDT | Special Weather Statement | CHS | 10 min |
| Apr 17, 8:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Apr 17, 9:22 PM EDT | Special Weather Statement | CHS | 23 min |
| May 6, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 6, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 22, 2:35 PM EDT | Special Weather Statement | CHS | 10 min |
| May 22, 3:28 PM EDT | Areal Flood Advisory | CHS | 81 min |
| May 22, 4:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| May 23, 2:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 23, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 23, 6:06 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| Jun 3, 3:13 PM EDT | Special Weather Statement | CHS | 32 min |
| Jun 4, 1:29 PM EDT | Areal Flood Advisory | CHS | 91 min |
| Jun 8, 1:59 PM EDT | Special Weather Statement | CHS | 31 min |
| Jun 9, 2:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 9, 4:32 PM EDT | Special Weather Statement | CHS | 43 min |
| Jun 9, 4:38 PM EDT | Severe Thunderstorm Warning | CHS | 67 min |
| Jun 9, 5:08 PM EDT | Severe Thunderstorm Warning | CHS | 37 min |
| Jun 9, 5:12 PM EDT | Areal Flood Advisory | CHS | 71 min |
| Jun 14, 12:17 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 14, 1:56 PM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Jun 14, 2:19 PM EDT | Special Weather Statement | CHS | 41 min |
| Jun 14, 2:31 PM EDT | Severe Thunderstorm Warning | CHS | 59 min |
| Jun 17, 6:39 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 9:27 PM EDT | Severe Thunderstorm Warning | CHS | 48 min |
| Jun 17, 10:04 PM EDT | Severe Thunderstorm Warning | CHS | 56 min |
| Jun 29, 2:47 PM EDT | Areal Flood Advisory | CHS | 45 min |
| Jul 9, 5:18 PM EDT | Special Weather Statement | CHS | 42 min |
| Jul 10, 3:59 PM EDT | Areal Flood Advisory | CHS | 47 min |
| Jul 11, 5:32 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Jul 11, 6:30 PM EDT | Areal Flood Advisory | CHS | 88 min |
| Jul 12, 5:21 PM EDT | Special Weather Statement | CHS | 24 min |
| Jul 12, 5:47 PM EDT | Special Weather Statement | CHS | 43 min |
| Jul 13, 1:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 14, 5:25 PM EDT | Severe Thunderstorm Warning | CHS | 65 min |
| Jul 14, 6:16 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Jul 24, 3:58 PM EDT | Severe Thunderstorm Warning | CHS | 47 min |
| Jul 24, 4:32 PM EDT | Severe Thunderstorm Warning | CHS | 58 min |
| Jul 24, 4:58 PM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Aug 3, 12:43 PM EDT | Special Weather Statement | CHS | 32 min |
| Aug 3, 1:08 PM EDT | Special Weather Statement | CHS | 37 min |
| Aug 7, 8:44 AM EDT | Areal Flood Advisory | CHS | 91 min |
| Aug 11, 3:54 PM EDT | Areal Flood Advisory | CHS | 64 min |
| Aug 11, 4:24 PM EDT | Special Weather Statement | CHS | 36 min |
| Aug 19, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 6:18 PM EDT | Severe Thunderstorm Warning | CHS | 57 min |
| Aug 21, 4:15 PM EDT | Special Weather Statement | CHS | 45 min |
| Aug 21, 4:45 PM EDT | Severe Thunderstorm Warning | CHS | 45 min |
| Aug 21, 5:29 PM EDT | Severe Thunderstorm Warning | CHS | 61 min |
| Aug 21, 5:30 PM EDT | Special Weather Statement | CHS | 45 min |
| Aug 21, 5:47 PM EDT | Areal Flood Advisory | CHS | 88 min |
| Aug 21, 6:10 PM EDT | Special Weather Statement | CHS | 50 min |
| Aug 21, 6:13 PM EDT | Areal Flood Advisory | CHS | 71 min |
| Aug 21, 7:13 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Aug 22, 6:42 PM EDT | Areal Flood Advisory | CHS | 3 hr |
| Aug 22, 6:58 PM EDT | Special Weather Statement | CHS | 47 min |
| Aug 22, 7:12 PM EDT | Areal Flood Advisory | CHS | 2 hr |
| Aug 25, 7:50 AM EDT | Areal Flood Advisory | CHS | 55 min |
| Aug 30, 1:44 AM EDT | Areal Flood Advisory | CHS | 2 hr |
| Sep 1, 5:32 PM EDT | Areal Flood Advisory | CHS | 53 min |
| Sep 2, 9:07 PM EDT | Special Weather Statement | CHS | 23 min |
| Nov 10, 12:31 PM EST | Mesoscale Discussion | SPC | 89 min |
| Nov 10, 12:47 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 10, 5:48 PM EST | Mesoscale Discussion | SPC | 57 min |
| Nov 10, 6:28 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 10, 6:45 PM EST | Special Weather Statement | CHS | 30 min |
| Nov 10, 6:56 PM EST | Special Weather Statement | CHS | 34 min |
| Nov 10, 8:44 PM EST | Special Weather Statement | CHS | 31 min |
| Nov 10, 9:24 PM EST | Special Weather Statement | CHS | 36 min |
| Nov 10, 10:43 PM EST | Mesoscale Discussion | SPC | 2 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 | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 27 |
| Flooding | |
| River Flood Warning | 1 |
| Areal Flood Advisory | 18 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.