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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings271737%2488%19 min
Flash flood warnings3233%367%37 min

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, SC: tornado warnings10190%1100%8 min
NWS Charleston, SC: severe thunderstorm warnings21112839%29277%23 min
NWS Charleston, SC: flash flood warnings13838%2176%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.

IssuedProductOfficeLasted
Jan 17, 12:22 AM ESTMesoscale DiscussionSPC83 min
Jan 24, 11:33 PM ESTTornado WatchSPC7 hr
Jan 24, 11:40 PM ESTMesoscale DiscussionSPC2 hr
Mar 21, 9:29 PM EDTMesoscale DiscussionSPC3 hr
Apr 8, 10:38 PM EDTSevere Thunderstorm WarningCHS37 min
May 4, 11:41 AM EDTMesoscale DiscussionSPC2 hr
May 23, 8:53 PM EDTSevere Thunderstorm WarningCHS67 min
May 23, 9:21 PM EDTSevere Thunderstorm WarningCHS54 min
May 24, 5:36 PM EDTSpecial Weather StatementCHS24 min
Jun 2, 11:48 PM EDTSpecial Weather StatementCHS87 min
Jun 3, 5:30 PM EDTSpecial Weather StatementCHS45 min
Jun 3, 5:35 PM EDTSevere Thunderstorm WarningCHS40 min
Jun 4, 3:38 PM EDTSpecial Weather StatementCHS37 min
Jun 5, 5:54 PM EDTSpecial Weather StatementCHS36 min
Jun 5, 6:20 PM EDTSpecial Weather StatementCHS25 min
Jun 6, 6:34 PM EDTSevere Thunderstorm WarningCHS56 min
Jun 15, 2:18 PM EDTSevere Thunderstorm WarningCHS24 min
Jun 19, 4:51 PM EDTSpecial Weather StatementCHS39 min
Jun 19, 5:27 PM EDTSpecial Weather StatementCHS33 min
Jun 20, 5:58 PM EDTSpecial Weather StatementCHS62 min
Jun 21, 3:32 PM EDTSpecial Weather StatementCHS43 min
Jun 24, 6:10 PM EDTSpecial Weather StatementCHS35 min
Jun 25, 3:10 PM EDTMesoscale DiscussionSPC95 min
Jun 25, 4:41 PM EDTSevere Thunderstorm WarningCHS64 min
Jun 25, 5:46 PM EDTSevere Thunderstorm WarningCHS37 min
Jun 27, 6:04 PM EDTSpecial Weather StatementCHS26 min
Jun 27, 6:50 PM EDTSevere Thunderstorm WarningCHS55 min
Jun 27, 7:17 PM EDTAreal Flood AdvisoryCHS88 min
Jun 27, 8:01 PM EDTFlash Flood WarningCHS2 hr
Jun 27, 8:39 PM EDTSpecial Weather StatementCHS51 min
Jun 27, 8:45 PM EDTSevere Thunderstorm WarningCHS37 min
Jun 29, 5:26 PM EDTSpecial Weather StatementCHS49 min
Jun 30, 1:17 PM EDTSpecial Weather StatementCHS43 min
Jun 30, 1:59 PM EDTSpecial Weather StatementCHS46 min
Jul 10, 4:55 PM EDTSpecial Weather StatementCHS50 min
Jul 10, 6:09 PM EDTSevere Thunderstorm WarningCHS66 min
Jul 10, 7:32 PM EDTSpecial Weather StatementCHS28 min
Jul 10, 7:42 PM EDTAreal Flood AdvisoryCHS90 min
Jul 11, 1:30 PM EDTMesoscale DiscussionSPC90 min
Jul 11, 2:00 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 11, 4:25 PM EDTSevere Thunderstorm WarningCHS65 min
Jul 11, 5:02 PM EDTSevere Thunderstorm WarningCHS58 min
Jul 11, 5:27 PM EDTSevere Thunderstorm WarningCHS40 min
Jul 11, 5:35 PM EDTSevere Thunderstorm WarningCHS55 min
Jul 11, 5:46 PM EDTMesoscale DiscussionSPC59 min
Jul 12, 1:14 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 12, 3:55 PM EDTSevere Thunderstorm WarningCHS65 min
Jul 12, 4:05 PM EDTSevere Thunderstorm WarningCHS55 min
Jul 12, 4:10 PM EDTMesoscale DiscussionSPC95 min
Jul 12, 4:56 PM EDTSevere Thunderstorm WarningCHS64 min
Jul 12, 5:56 PM EDTSevere Thunderstorm WarningCHS64 min
Jul 12, 6:57 PM EDTSevere Thunderstorm WarningCHS63 min
Jul 12, 7:00 PM EDTAreal Flood AdvisoryCHS60 min
Jul 13, 1:17 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 13, 2:45 PM EDTSpecial Weather StatementCHS30 min
Jul 13, 3:15 PM EDTSpecial Weather StatementCHS45 min
Jul 13, 3:56 PM EDTAreal Flood AdvisoryCHS94 min
Jul 13, 4:53 PM EDTFlash Flood WarningCHS44 min
Jul 13, 5:43 PM EDTMesoscale DiscussionSPC62 min
Jul 14, 5:37 PM EDTSevere Thunderstorm WarningCHS53 min
Jul 14, 5:51 PM EDTSpecial Weather StatementCHS24 min
Jul 14, 6:08 PM EDTSevere Thunderstorm WarningCHS48 min
Jul 26, 2:53 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 26, 4:34 PM EDTSpecial Weather StatementCHS41 min
Jul 27, 9:35 PM EDTSpecial Weather StatementCHS25 min
Jul 27, 9:59 PM EDTSpecial Weather StatementCHS61 min
Jul 27, 10:13 PM EDTSevere Thunderstorm WarningCHS32 min
Jul 27, 10:48 PM EDTSpecial Weather StatementCHS42 min
Jul 31, 1:31 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 31, 3:21 PM EDTMesoscale DiscussionSPC54 min
Jul 31, 7:00 PM EDTMesoscale DiscussionSPC60 min
Aug 3, 12:25 PM EDTSpecial Weather StatementCHS50 min
Aug 6, 1:25 PM EDTSevere Thunderstorm WatchSPC10 hr
Aug 6, 4:59 PM EDTMesoscale DiscussionSPC61 min
Aug 6, 7:02 PM EDTMesoscale DiscussionSPC58 min
Aug 6, 10:41 PM EDTSpecial Weather StatementCHS49 min
Aug 15, 2:23 PM EDTAreal Flood AdvisoryCHS112 min
Aug 16, 8:26 AM EDTAreal Flood AdvisoryCHS64 min
Aug 20, 5:58 PM EDTSevere Thunderstorm WarningCHS62 min
Aug 20, 6:33 PM EDTFlash Flood WarningCHS97 min
Aug 21, 7:52 PM EDTAreal Flood AdvisoryCHS54 min
Aug 22, 10:06 PM EDTAreal Flood AdvisoryCHS54 min
Aug 22, 11:00 PM EDTAreal Flood AdvisoryCHS90 min
Aug 24, 4:39 PM EDTSevere Thunderstorm WarningCHS51 min
Aug 24, 4:56 PM EDTSevere Thunderstorm WarningCHS40 min
Aug 25, 9:08 PM EDTSpecial Weather StatementCHS22 min
Aug 26, 2:19 PM EDTMesoscale DiscussionSPC86 min
Aug 26, 4:21 PM EDTSpecial Weather StatementCHS54 min
Aug 26, 4:31 PM EDTSevere Thunderstorm WarningCHS30 min
Aug 28, 12:29 PM EDTSpecial Weather StatementCHS61 min
Sep 11, 3:13 PM EDTSpecial Weather StatementCHS62 min
Sep 27, 4:02 AM EDTMesoscale DiscussionSPC2 hr
Sep 27, 8:53 AM EDTMesoscale DiscussionSPC97 min
Sep 27, 11:29 AM EDTSpecial Weather StatementCHS46 min
Sep 28, 11:25 PM EDTAreal Flood AdvisoryCHS95 min
Oct 25, 9:56 AM EDTMesoscale DiscussionSPC2 hr
Oct 25, 11:36 AM EDTSevere Thunderstorm WatchSPC8 hr
Oct 25, 3:42 PM EDTMesoscale DiscussionSPC63 min
Oct 25, 6:13 PM EDTSpecial Weather StatementCHS32 min
Oct 25, 6:32 PM EDTSpecial Weather StatementCHS28 min
Oct 25, 6:36 PM EDTMesoscale DiscussionSPC54 min
Nov 30, 2:15 PM ESTMesoscale DiscussionSPC2 hr
Nov 30, 11:47 PM ESTSpecial Weather StatementCHS88 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 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.