Alert archive / Georgia / Jefferson County

Weather alerts in Jefferson County, Georgia, 2018

101 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Jefferson County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
101
Warnings
14
Watches
13
Advisories
14
Busiest month
June24 alerts
Busiest day
March 20, 20186 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Jefferson County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8275%4100%18 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Atlanta, GA: tornado warnings25772%1471%10 min
NWS Atlanta, GA: severe thunderstorm warnings34121936%84170%17 min
NWS Atlanta, GA: flash flood warnings502844%9367%109 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 15, 2:25 PM ESTWinter Weather AdvisoryFFC46 hr
Feb 4, 10:53 AM ESTSpecial Weather StatementFFC37 min
Mar 1, 3:43 AM ESTWind AdvisoryFFC14 hr
Mar 1, 2:05 PM ESTMesoscale DiscussionSPC2 hr
Mar 1, 3:13 PM ESTSpecial Weather StatementFFC47 min
Mar 1, 3:55 PM ESTSpecial Weather StatementFFC50 min
Mar 7, 7:47 PM ESTFreeze WatchFFC7 hr
Mar 8, 2:23 AM ESTFreeze WarningFFC31 hr
Mar 12, 3:31 AM EDTWind AdvisoryFFC22 hr
Mar 12, 3:01 PM EDTFreeze WatchFFC25 hr
Mar 13, 4:11 PM EDTFreeze WatchFFC18 hr
Mar 13, 4:11 PM EDTFreeze WarningFFC18 hr
Mar 14, 10:32 AM EDTFreeze WarningFFC23 hr
Mar 19, 9:08 PM EDTTornado WatchSPC7 hr
Mar 20, 1:53 AM EDTSevere Thunderstorm WarningFFC52 min
Mar 20, 2:36 AM EDTMesoscale DiscussionSPC84 min
Mar 20, 2:46 AM EDTSevere Thunderstorm WarningFFC44 min
Mar 20, 3:27 AM EDTSpecial Weather StatementFFC33 min
Mar 20, 3:32 PM EDTWind AdvisoryFFC28 hr
Apr 15, 9:47 PM EDTWind AdvisoryFFC24 hr
Apr 23, 9:25 AM EDTSpecial Weather StatementFFC65 min
Apr 23, 3:59 PM EDTMesoscale DiscussionSPC61 min
Apr 23, 8:39 PM EDTMesoscale DiscussionSPC66 min
May 18, 4:40 PM EDTSpecial Weather StatementFFC35 min
May 22, 5:52 PM EDTSpecial Weather StatementFFC38 min
May 23, 2:31 PM EDTFlash Flood WatchFFC20 hr
May 24, 12:12 PM EDTFlash Flood WatchFFC39 hr
May 25, 8:00 PM EDTSpecial Weather StatementFFC45 min
May 31, 9:01 PM EDTSpecial Weather StatementFFC29 min
May 31, 9:37 PM EDTSpecial Weather StatementFFC23 min
Jun 1, 5:38 PM EDTMesoscale DiscussionSPC2 hr
Jun 2, 2:10 PM EDTSpecial Weather StatementFFC35 min
Jun 2, 2:45 PM EDTSpecial Weather StatementFFC30 min
Jun 9, 7:34 PM EDTSpecial Weather StatementFFC26 min
Jun 11, 6:03 PM EDTSevere Thunderstorm WarningFFC27 min
Jun 15, 8:37 PM EDTSpecial Weather StatementFFC38 min
Jun 16, 6:07 PM EDTSpecial Weather StatementFFC23 min
Jun 16, 6:27 PM EDTSpecial Weather StatementFFC33 min
Jun 16, 6:57 PM EDTSpecial Weather StatementFFC33 min
Jun 22, 10:05 PM EDTSpecial Weather StatementFFC40 min
Jun 22, 10:40 PM EDTSpecial Weather StatementFFC50 min
Jun 23, 2:16 PM EDTSpecial Weather StatementFFC29 min
Jun 24, 4:23 AM EDTHeat AdvisoryFFC16 hr
Jun 24, 9:58 PM EDTSpecial Weather StatementFFC32 min
Jun 25, 4:26 AM EDTHeat AdvisoryFFC16 hr
Jun 25, 7:44 PM EDTMesoscale DiscussionSPC2 hr
Jun 25, 7:52 PM EDTSpecial Weather StatementFFC23 min
Jun 25, 8:18 PM EDTSpecial Weather StatementFFC27 min
Jun 26, 6:22 PM EDTMesoscale DiscussionSPC113 min
Jun 27, 6:24 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 9:04 PM EDTSpecial Weather StatementFFC56 min
Jun 28, 11:46 AM EDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 4:11 PM EDTSpecial Weather StatementFFC49 min
Jul 3, 4:32 PM EDTSevere Thunderstorm WarningFFC43 min
Jul 3, 4:52 PM EDTMesoscale DiscussionSPC113 min
Jul 3, 5:29 PM EDTSpecial Weather StatementFFC46 min
Jul 12, 4:50 PM EDTSpecial Weather StatementFFC25 min
Jul 13, 1:19 PM EDTSpecial Weather StatementFFC41 min
Jul 13, 2:02 PM EDTSpecial Weather StatementFFC28 min
Jul 13, 2:29 PM EDTSpecial Weather StatementFFC31 min
Jul 21, 8:10 AM EDTMesoscale DiscussionSPC2 hr
Jul 21, 5:42 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 22, 6:47 PM EDTSevere Thunderstorm WarningFFC43 min
Jul 29, 2:47 PM EDTSpecial Weather StatementFFC28 min
Jul 30, 8:25 PM EDTSevere Thunderstorm WarningFFC35 min
Aug 1, 1:23 PM EDTMesoscale DiscussionSPC3 hr
Aug 1, 4:03 PM EDTSpecial Weather StatementFFC27 min
Aug 1, 4:32 PM EDTSpecial Weather StatementFFC13 min
Aug 2, 3:45 PM EDTSpecial Weather StatementFFC45 min
Aug 6, 2:45 PM EDTSpecial Weather StatementFFC30 min
Aug 6, 2:52 PM EDTSevere Thunderstorm WarningFFC53 min
Aug 7, 3:32 AM EDTHeat AdvisoryFFC15 hr
Aug 8, 9:04 PM EDTSpecial Weather StatementFFC26 min
Aug 8, 10:36 PM EDTSpecial Weather StatementFFC24 min
Aug 8, 10:58 PM EDTSpecial Weather StatementFFC32 min
Aug 9, 6:10 PM EDTMesoscale DiscussionSPC2 hr
Sep 10, 6:01 PM EDTSpecial Weather StatementFFC44 min
Sep 11, 3:43 PM EDTSpecial Weather StatementFFC47 min
Sep 11, 4:34 PM EDTSpecial Weather StatementFFC41 min
Sep 27, 3:03 PM EDTMesoscale DiscussionSPC2 hr
Oct 9, 3:57 AM EDTFlash Flood WatchFFC51 hr
Oct 9, 6:21 AM EDTTropical Storm WatchFFC11 hr
Oct 9, 1:55 PM EDTTropical Storm WarningFFC42 hr
Oct 10, 1:29 PM EDTMesoscale DiscussionSPC3 hr
Oct 10, 2:44 PM EDTTornado WatchSPC11 hr
Oct 10, 4:32 PM EDTMesoscale DiscussionSPC118 min
Oct 10, 9:08 PM EDTMesoscale DiscussionSPC2 hr
Oct 11, 12:14 AM EDTAreal Flood WarningFFC6 hr
Oct 21, 3:01 PM EDTFrost AdvisoryFFC17 hr
Nov 7, 4:45 PM ESTMesoscale DiscussionSPC90 min
Nov 7, 6:58 PM ESTSpecial Weather StatementFFC32 min
Nov 7, 7:28 PM ESTSpecial Weather StatementFFC32 min
Nov 13, 2:20 PM ESTFlash Flood WatchFFC41 hr
Nov 15, 3:28 AM ESTFreeze WarningFFC29 hr
Nov 16, 2:18 PM ESTFrost AdvisoryFFC19 hr
Nov 25, 12:10 AM ESTDense Fog AdvisoryFFC11 hr
Dec 2, 7:31 AM ESTSevere Thunderstorm WarningFFC44 min
Dec 7, 12:45 PM ESTFlood WatchFFC45 hr
Dec 8, 4:10 AM ESTWind AdvisoryFFC32 hr
Dec 21, 3:39 AM ESTWind AdvisoryFFC15 hr
Dec 30, 1:58 PM ESTDense Fog AdvisoryFFC19 hr

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 archive20172019

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.