Alert archive / Georgia / Chatham County
Weather alerts in Chatham County, Georgia, 2010
103 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 103
- Warnings
- 30
- Watches
- 8
- Advisories
- 10
- Busiest month
- July37 alerts
- Busiest day
- July 12, 20108 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Chatham County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 27 | 17 | 37% | 24 | 88% | 19 min |
| Flash flood warnings | 3 | 2 | 33% | 3 | 67% | 37 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Charleston, SC: tornado warnings | 10 | 1 | 90% | 1 | 100% | 8 min |
| NWS Charleston, SC: severe thunderstorm warnings | 211 | 128 | 39% | 292 | 77% | 23 min |
| NWS Charleston, SC: flash flood warnings | 13 | 8 | 38% | 21 | 76% | 44 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 17, 12:22 AM EST | Mesoscale Discussion | SPC | 83 min |
| Jan 24, 11:33 PM EST | Tornado Watch | SPC | 7 hr |
| Jan 24, 11:40 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 21, 9:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 8, 10:38 PM EDT | Severe Thunderstorm Warning | CHS | 37 min |
| May 4, 11:41 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 8:53 PM EDT | Severe Thunderstorm Warning | CHS | 67 min |
| May 23, 9:21 PM EDT | Severe Thunderstorm Warning | CHS | 54 min |
| May 24, 5:36 PM EDT | Special Weather Statement | CHS | 24 min |
| Jun 2, 11:48 PM EDT | Special Weather Statement | CHS | 87 min |
| Jun 3, 5:30 PM EDT | Special Weather Statement | CHS | 45 min |
| Jun 3, 5:35 PM EDT | Severe Thunderstorm Warning | CHS | 40 min |
| Jun 4, 3:38 PM EDT | Special Weather Statement | CHS | 37 min |
| Jun 5, 5:54 PM EDT | Special Weather Statement | CHS | 36 min |
| Jun 5, 6:20 PM EDT | Special Weather Statement | CHS | 25 min |
| Jun 6, 6:34 PM EDT | Severe Thunderstorm Warning | CHS | 56 min |
| Jun 15, 2:18 PM EDT | Severe Thunderstorm Warning | CHS | 24 min |
| Jun 19, 4:51 PM EDT | Special Weather Statement | CHS | 39 min |
| Jun 19, 5:27 PM EDT | Special Weather Statement | CHS | 33 min |
| Jun 20, 5:58 PM EDT | Special Weather Statement | CHS | 62 min |
| Jun 21, 3:32 PM EDT | Special Weather Statement | CHS | 43 min |
| Jun 24, 6:10 PM EDT | Special Weather Statement | CHS | 35 min |
| Jun 25, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 25, 4:41 PM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Jun 25, 5:46 PM EDT | Severe Thunderstorm Warning | CHS | 37 min |
| Jun 27, 6:04 PM EDT | Special Weather Statement | CHS | 26 min |
| Jun 27, 6:50 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Jun 27, 7:17 PM EDT | Areal Flood Advisory | CHS | 88 min |
| Jun 27, 8:01 PM EDT | Flash Flood Warning | CHS | 2 hr |
| Jun 27, 8:39 PM EDT | Special Weather Statement | CHS | 51 min |
| Jun 27, 8:45 PM EDT | Severe Thunderstorm Warning | CHS | 37 min |
| Jun 29, 5:26 PM EDT | Special Weather Statement | CHS | 49 min |
| Jun 30, 1:17 PM EDT | Special Weather Statement | CHS | 43 min |
| Jun 30, 1:59 PM EDT | Special Weather Statement | CHS | 46 min |
| Jul 10, 4:55 PM EDT | Special Weather Statement | CHS | 50 min |
| Jul 10, 6:09 PM EDT | Severe Thunderstorm Warning | CHS | 66 min |
| Jul 10, 7:32 PM EDT | Special Weather Statement | CHS | 28 min |
| Jul 10, 7:42 PM EDT | Areal Flood Advisory | CHS | 90 min |
| Jul 11, 1:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 11, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 4:25 PM EDT | Severe Thunderstorm Warning | CHS | 65 min |
| Jul 11, 5:02 PM EDT | Severe Thunderstorm Warning | CHS | 58 min |
| Jul 11, 5:27 PM EDT | Severe Thunderstorm Warning | CHS | 40 min |
| Jul 11, 5:35 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Jul 11, 5:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 12, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 3:55 PM EDT | Severe Thunderstorm Warning | CHS | 65 min |
| Jul 12, 4:05 PM EDT | Severe Thunderstorm Warning | CHS | 55 min |
| Jul 12, 4:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 12, 4:56 PM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Jul 12, 5:56 PM EDT | Severe Thunderstorm Warning | CHS | 64 min |
| Jul 12, 6:57 PM EDT | Severe Thunderstorm Warning | CHS | 63 min |
| Jul 12, 7:00 PM EDT | Areal Flood Advisory | CHS | 60 min |
| Jul 13, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 2:45 PM EDT | Special Weather Statement | CHS | 30 min |
| Jul 13, 3:15 PM EDT | Special Weather Statement | CHS | 45 min |
| Jul 13, 3:56 PM EDT | Areal Flood Advisory | CHS | 94 min |
| Jul 13, 4:53 PM EDT | Flash Flood Warning | CHS | 44 min |
| Jul 13, 5:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 14, 5:37 PM EDT | Severe Thunderstorm Warning | CHS | 53 min |
| Jul 14, 5:51 PM EDT | Special Weather Statement | CHS | 24 min |
| Jul 14, 6:08 PM EDT | Severe Thunderstorm Warning | CHS | 48 min |
| Jul 26, 2:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 4:34 PM EDT | Special Weather Statement | CHS | 41 min |
| Jul 27, 9:35 PM EDT | Special Weather Statement | CHS | 25 min |
| Jul 27, 9:59 PM EDT | Special Weather Statement | CHS | 61 min |
| Jul 27, 10:13 PM EDT | Severe Thunderstorm Warning | CHS | 32 min |
| Jul 27, 10:48 PM EDT | Special Weather Statement | CHS | 42 min |
| Jul 31, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 31, 3:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 31, 7:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 3, 12:25 PM EDT | Special Weather Statement | CHS | 50 min |
| Aug 6, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 6, 4:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 6, 7:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Aug 6, 10:41 PM EDT | Special Weather Statement | CHS | 49 min |
| Aug 15, 2:23 PM EDT | Areal Flood Advisory | CHS | 112 min |
| Aug 16, 8:26 AM EDT | Areal Flood Advisory | CHS | 64 min |
| Aug 20, 5:58 PM EDT | Severe Thunderstorm Warning | CHS | 62 min |
| Aug 20, 6:33 PM EDT | Flash Flood Warning | CHS | 97 min |
| Aug 21, 7:52 PM EDT | Areal Flood Advisory | CHS | 54 min |
| Aug 22, 10:06 PM EDT | Areal Flood Advisory | CHS | 54 min |
| Aug 22, 11:00 PM EDT | Areal Flood Advisory | CHS | 90 min |
| Aug 24, 4:39 PM EDT | Severe Thunderstorm Warning | CHS | 51 min |
| Aug 24, 4:56 PM EDT | Severe Thunderstorm Warning | CHS | 40 min |
| Aug 25, 9:08 PM EDT | Special Weather Statement | CHS | 22 min |
| Aug 26, 2:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 26, 4:21 PM EDT | Special Weather Statement | CHS | 54 min |
| Aug 26, 4:31 PM EDT | Severe Thunderstorm Warning | CHS | 30 min |
| Aug 28, 12:29 PM EDT | Special Weather Statement | CHS | 61 min |
| Sep 11, 3:13 PM EDT | Special Weather Statement | CHS | 62 min |
| Sep 27, 4:02 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 27, 8:53 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 27, 11:29 AM EDT | Special Weather Statement | CHS | 46 min |
| Sep 28, 11:25 PM EDT | Areal Flood Advisory | CHS | 95 min |
| Oct 25, 9:56 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 25, 11:36 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Oct 25, 3:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Oct 25, 6:13 PM EDT | Special Weather Statement | CHS | 32 min |
| Oct 25, 6:32 PM EDT | Special Weather Statement | CHS | 28 min |
| Oct 25, 6:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Nov 30, 2:15 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 30, 11:47 PM EST | Special Weather Statement | CHS | 88 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 | 27 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 35 |
| Flooding | |
| Flash Flood Warning | 3 |
| Areal Flood Advisory | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.