Alert archive / Georgia / Chatham County

Weather alerts in Chatham County, Georgia, 2013

128 weather alerts in 2013, 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 2013. Tap one for its archive.

Alerts
128
Warnings
29
Watches
7
Advisories
27
Busiest month
June30 alerts
Busiest day
September 4, 20137 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 1 tornado warnings covering Chatham County in 2013 had a tornado report inside them.

Chatham County, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings14936%2181%24 min
Flash flood warnings8625%3397%132 min

Each office's whole area, 2013

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, SC: tornado warnings15193%367%10 min
NWS Charleston, SC: severe thunderstorm warnings1327940%27181%25 min
NWS Charleston, SC: flash flood warnings443227%15492%116 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.

IssuedProductOfficeLasted
Jan 30, 8:44 PM ESTMesoscale DiscussionSPC61 min
Jan 30, 8:56 PM ESTTornado WatchSPC3 hr
Jan 30, 9:15 PM ESTSevere Thunderstorm WarningCHS60 min
Jan 30, 10:08 PM ESTSevere Thunderstorm WarningCHS52 min
Jan 30, 10:42 PM ESTMesoscale DiscussionSPC93 min
Feb 7, 7:19 PM ESTMesoscale DiscussionSPC86 min
Feb 11, 6:52 PM ESTSpecial Weather StatementCHS23 min
Feb 11, 7:15 PM ESTSpecial Weather StatementCHS15 min
Feb 11, 7:33 PM ESTSpecial Weather StatementCHS12 min
Feb 12, 4:02 PM ESTSpecial Weather StatementCHS28 min
Feb 12, 11:46 PM ESTMesoscale DiscussionSPC119 min
Feb 13, 3:57 AM ESTSpecial Weather StatementCHS48 min
Feb 13, 5:31 AM ESTTornado WatchSPC3 hr
Feb 16, 10:19 AM ESTRiver Flood WarningCHS30 days
Feb 26, 6:16 AM ESTTornado WarningCHS44 min
Feb 26, 6:49 AM ESTTornado WatchSPC8 hr
Feb 26, 7:10 AM ESTAreal Flood AdvisoryCHS110 min
Feb 26, 11:38 AM ESTMesoscale DiscussionSPC67 min
Mar 18, 7:29 PM EDTSevere Thunderstorm WatchSPC6 hr
Mar 18, 9:58 PM EDTSevere Thunderstorm WarningCHS62 min
Mar 18, 10:54 PM EDTSpecial Weather StatementCHS66 min
Mar 24, 2:58 AM EDTSpecial Weather StatementCHS47 min
Mar 24, 9:44 AM EDTAreal Flood AdvisoryCHS2 hr
Mar 24, 10:51 AM EDTAreal Flood AdvisoryCHS84 min
Mar 24, 12:03 PM EDTRiver Flood WarningCHS32 days
Apr 12, 12:46 AM EDTMesoscale DiscussionSPC89 min
Apr 12, 1:06 AM EDTTornado WatchSPC6 hr
Apr 19, 1:57 PM EDTMesoscale DiscussionSPC2 hr
Apr 19, 2:36 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 19, 4:29 PM EDTMesoscale DiscussionSPC2 hr
Apr 19, 5:18 PM EDTSevere Thunderstorm WarningCHS57 min
Apr 19, 6:21 PM EDTSpecial Weather StatementCHS39 min
Apr 19, 6:37 PM EDTMesoscale DiscussionSPC113 min
Apr 29, 1:38 PM EDTMesoscale DiscussionSPC97 min
Apr 29, 4:16 PM EDTSevere Thunderstorm WarningCHS59 min
Apr 29, 5:35 PM EDTAreal Flood AdvisoryCHS115 min
May 4, 4:39 AM EDTAreal Flood AdvisoryCHS111 min
May 9, 11:00 AM EDTRiver Flood WarningCHS48 hr
May 14, 10:36 AM EDTRiver Flood WarningCHS9 days
May 18, 4:17 PM EDTSevere Thunderstorm WarningCHS43 min
Jun 4, 2:15 PM EDTAreal Flood AdvisoryCHS90 min
Jun 4, 2:20 PM EDTSevere Thunderstorm WarningCHS40 min
Jun 5, 11:59 AM EDTAreal Flood AdvisoryCHS3 hr
Jun 5, 12:42 PM EDTSpecial Weather StatementCHS63 min
Jun 6, 3:58 PM EDTAreal Flood AdvisoryCHS77 min
Jun 6, 5:54 PM EDTMesoscale DiscussionSPC96 min
Jun 6, 6:24 PM EDTSpecial Weather StatementCHS96 min
Jun 6, 6:38 PM EDTAreal Flood AdvisoryCHS2 hr
Jun 6, 7:32 PM EDTMesoscale DiscussionSPC118 min
Jun 7, 1:16 AM EDTAreal Flood AdvisoryCHS119 min
Jun 10, 3:25 PM EDTSpecial Weather StatementCHS35 min
Jun 10, 3:56 PM EDTSpecial Weather StatementCHS34 min
Jun 10, 6:31 PM EDTSpecial Weather StatementCHS44 min
Jun 10, 6:39 PM EDTSevere Thunderstorm WarningCHS66 min
Jun 10, 7:20 PM EDTMesoscale DiscussionSPC85 min
Jun 12, 9:47 PM EDTRiver Flood WarningCHS61 days
Jun 18, 2:02 PM EDTMesoscale DiscussionSPC88 min
Jun 19, 5:14 PM EDTSpecial Weather StatementCHS46 min
Jun 19, 5:34 PM EDTSevere Thunderstorm WarningCHS56 min
Jun 19, 6:51 PM EDTAreal Flood AdvisoryCHS114 min
Jun 22, 4:31 PM EDTAreal Flood AdvisoryCHS59 min
Jun 25, 7:23 PM EDTSpecial Weather StatementCHS52 min
Jun 26, 4:12 PM EDTSpecial Weather StatementCHS48 min
Jun 26, 4:31 PM EDTSevere Thunderstorm WarningCHS44 min
Jun 26, 5:13 PM EDTSevere Thunderstorm WarningCHS47 min
Jun 27, 3:39 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 5:23 PM EDTSpecial Weather StatementCHS52 min
Jun 27, 5:30 PM EDTSevere Thunderstorm WarningCHS60 min
Jun 27, 6:25 PM EDTMesoscale DiscussionSPC65 min
Jun 30, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 1, 2:25 PM EDTSpecial Weather StatementCHS35 min
Jul 1, 3:06 PM EDTAreal Flood AdvisoryCHS84 min
Jul 2, 1:53 PM EDTAreal Flood AdvisoryCHS52 min
Jul 12, 4:37 PM EDTAreal Flood AdvisoryCHS83 min
Jul 12, 5:04 PM EDTFlash Flood WarningCHS6 hr
Jul 12, 9:25 PM EDTFlash Flood WarningCHS2 hr
Jul 13, 2:36 PM EDTFlash Flood WarningCHS114 min
Jul 13, 4:28 PM EDTFlash Flood WarningCHS2 hr
Jul 14, 5:31 AM EDTAreal Flood AdvisoryCHS89 min
Jul 22, 4:12 PM EDTSpecial Weather StatementCHS33 min
Jul 23, 9:26 PM EDTSpecial Weather StatementCHS34 min
Jul 25, 4:42 PM EDTSpecial Weather StatementCHS48 min
Jul 25, 5:10 PM EDTSpecial Weather StatementCHS50 min
Jul 25, 5:13 PM EDTAreal Flood AdvisoryCHS2 hr
Jul 25, 5:35 PM EDTSpecial Weather StatementCHS40 min
Jul 25, 6:11 PM EDTSpecial Weather StatementCHS49 min
Jul 25, 7:48 PM EDTSpecial Weather StatementCHS42 min
Jul 31, 3:57 PM EDTSpecial Weather StatementCHS48 min
Jul 31, 4:53 PM EDTAreal Flood AdvisoryCHS112 min
Jul 31, 5:44 PM EDTFlash Flood WarningCHS61 min
Jul 31, 6:44 PM EDTFlash Flood WarningCHS61 min
Aug 13, 4:13 PM EDTMesoscale DiscussionSPC92 min
Aug 13, 8:50 PM EDTSpecial Weather StatementCHS25 min
Aug 13, 9:20 PM EDTSpecial Weather StatementCHS25 min
Aug 13, 9:42 PM EDTSpecial Weather StatementCHS33 min
Aug 14, 2:18 PM EDTMesoscale DiscussionSPC2 hr
Aug 14, 6:02 PM EDTSpecial Weather StatementCHS43 min
Aug 14, 6:55 PM EDTAreal Flood AdvisoryCHS50 min
Aug 14, 8:56 PM EDTSpecial Weather StatementCHS34 min
Aug 16, 2:03 PM EDTMesoscale DiscussionSPC2 hr
Aug 16, 3:56 PM EDTAreal Flood AdvisoryCHS94 min
Aug 16, 4:24 PM EDTFlash Flood WarningCHS9 hr
Aug 16, 5:09 PM EDTFlash Flood WarningCHS5 hr
Aug 17, 3:44 PM EDTSpecial Weather StatementCHS31 min
Aug 17, 11:22 PM EDTSpecial Weather StatementCHS53 min
Aug 18, 2:36 PM EDTRiver Flood WarningCHS21 days
Aug 19, 2:19 PM EDTMesoscale DiscussionSPC2 hr
Aug 20, 2:39 PM EDTAreal Flood AdvisoryCHS96 min
Aug 21, 11:46 AM EDTAreal Flood AdvisoryCHS119 min
Aug 21, 2:12 PM EDTAreal Flood AdvisoryCHS3 hr
Aug 21, 2:27 PM EDTAreal Flood AdvisoryCHS3 hr
Aug 22, 4:34 AM EDTAreal Flood AdvisoryCHS56 min
Sep 2, 7:53 PM EDTSpecial Weather StatementCHS37 min
Sep 4, 2:38 PM EDTSpecial Weather StatementCHS37 min
Sep 4, 3:16 PM EDTSpecial Weather StatementCHS29 min
Sep 4, 3:47 PM EDTAreal Flood AdvisoryCHS88 min
Sep 4, 4:09 PM EDTSpecial Weather StatementCHS36 min
Sep 4, 4:14 PM EDTSpecial Weather StatementCHS31 min
Sep 4, 5:19 PM EDTSpecial Weather StatementCHS26 min
Sep 4, 5:33 PM EDTSevere Thunderstorm WarningCHS57 min
Sep 5, 6:01 PM EDTSpecial Weather StatementCHS44 min
Sep 15, 10:16 AM EDTSpecial Weather StatementCHS44 min
Oct 8, 7:40 AM EDTAreal Flood AdvisoryCHS95 min
Nov 1, 9:31 PM EDTMesoscale DiscussionSPC104 min
Nov 26, 3:43 PM ESTMesoscale DiscussionSPC2 hr
Nov 26, 5:40 PM ESTTornado WatchSPC7 hr
Nov 26, 6:53 PM ESTSevere Thunderstorm WarningCHS52 min
Nov 26, 7:48 PM ESTMesoscale DiscussionSPC87 min

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20122014

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.