Alert archive / Georgia / Decatur County

Weather alerts in Decatur County, Georgia, 2020

138 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Decatur County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
138
Warnings
45
Watches
18
Advisories
21
Busiest month
April27 alerts
Busiest day
April 23, 202013 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 2 tornado warnings covering Decatur County in 2020 had a tornado report inside them.

Decatur County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings2150%0
Severe thunderstorm warnings332718%5100%27 min
Flash flood warnings110%1100%70 min

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Tallahassee, FL: tornado warnings792371%4083%15 min
NWS Tallahassee, FL: severe thunderstorm warnings24417827%62393%32 min
NWS Tallahassee, FL: flash flood warnings37355%10596%547 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 10, 8:27 PM ESTWind AdvisoryTAE25 hr
Jan 11, 3:26 PM ESTMesoscale DiscussionSPC94 min
Jan 11, 3:44 PM ESTTornado WatchSPC5 hr
Jan 11, 6:21 PM ESTMesoscale DiscussionSPC114 min
Jan 11, 7:43 PM ESTSevere Thunderstorm WarningTAE47 min
Jan 11, 8:40 PM ESTMesoscale DiscussionSPC95 min
Jan 11, 8:51 PM ESTSpecial Weather StatementTAE39 min
Jan 12, 7:26 PM ESTDense Fog AdvisoryTAE14 hr
Jan 14, 12:46 AM ESTDense Fog AdvisoryTAE8 hr
Jan 14, 10:46 PM ESTDense Fog AdvisoryTAE12 hr
Jan 16, 1:16 AM ESTDense Fog AdvisoryTAE8 hr
Feb 5, 2:53 AM ESTFlash Flood WatchTAE39 hr
Feb 6, 1:29 AM ESTWind AdvisoryTAE20 hr
Feb 6, 4:27 AM ESTTornado WatchSPC9 hr
Feb 6, 11:00 AM ESTMesoscale DiscussionSPC2 hr
Feb 6, 11:45 AM ESTMesoscale DiscussionSPC90 min
Feb 6, 12:17 PM ESTTornado WatchSPC8 hr
Feb 6, 2:32 PM ESTMesoscale DiscussionSPC58 min
Feb 6, 2:58 PM ESTSevere Thunderstorm WarningTAE62 min
Feb 6, 4:02 PM ESTSevere Thunderstorm WarningTAE58 min
Feb 6, 4:29 PM ESTMesoscale DiscussionSPC2 hr
Feb 6, 4:47 PM ESTSevere Thunderstorm WarningTAE73 min
Feb 8, 3:36 AM ESTRiver Flood WarningTAE3 days
Feb 8, 3:40 PM ESTRiver Flood WarningTAE3 days
Feb 11, 10:33 PM ESTDense Fog AdvisoryTAE13 hr
Feb 13, 12:10 PM ESTSpecial Weather StatementTAE65 min
Feb 17, 6:46 PM ESTDense Fog AdvisoryTAE15 hr
Feb 22, 11:26 AM ESTRiver Flood WarningTAE8 days
Mar 3, 2:40 PM ESTFlash Flood WatchTAE48 hr
Mar 4, 7:37 AM ESTMesoscale DiscussionSPC2 hr
Mar 4, 10:16 AM ESTTornado WatchSPC6 hr
Mar 4, 12:34 PM ESTMesoscale DiscussionSPC86 min
Mar 4, 9:37 PM ESTRiver Flood WarningTAE11 days
Mar 5, 3:26 AM ESTMesoscale DiscussionSPC3 hr
Mar 11, 3:24 AM EDTDense Fog AdvisoryTAE8 hr
Mar 13, 4:09 AM EDTDense Fog AdvisoryTAE6 hr
Mar 14, 4:09 AM EDTDense Fog AdvisoryTAE7 hr
Mar 18, 5:22 AM EDTDense Fog AdvisoryTAE5 hr
Mar 27, 5:12 AM EDTDense Fog AdvisoryTAE5 hr
Mar 28, 5:23 AM EDTDense Fog AdvisoryTAE5 hr
Mar 30, 2:12 PM EDTWind AdvisoryTAE30 hr
Mar 31, 9:51 AM EDTTornado WatchSPC6 hr
Mar 31, 1:05 PM EDTSevere Thunderstorm WarningTAE55 min
Mar 31, 1:09 PM EDTMesoscale DiscussionSPC96 min
Mar 31, 1:43 PM EDTSevere Thunderstorm WarningTAE62 min
Mar 31, 2:12 PM EDTSevere Thunderstorm WarningTAE63 min
Apr 8, 6:41 PM EDTMesoscale DiscussionSPC94 min
Apr 11, 2:40 PM EDTWind AdvisoryTAE41 hr
Apr 12, 11:45 PM EDTTornado WatchSPC8 hr
Apr 13, 4:09 AM EDTSevere Thunderstorm WarningTAE66 min
Apr 13, 5:04 AM EDTSevere Thunderstorm WarningTAE56 min
Apr 13, 5:52 AM EDTSevere Thunderstorm WarningTAE53 min
Apr 19, 10:53 PM EDTMesoscale DiscussionSPC67 min
Apr 19, 11:13 PM EDTTornado WatchSPC10 hr
Apr 20, 1:26 AM EDTSevere Thunderstorm WarningTAE34 min
Apr 20, 1:52 AM EDTSevere Thunderstorm WarningTAE68 min
Apr 23, 8:43 AM EDTMesoscale DiscussionSPC92 min
Apr 23, 10:29 AM EDTMesoscale DiscussionSPC61 min
Apr 23, 10:52 AM EDTTornado WatchSPC6 hr
Apr 23, 10:58 AM EDTSevere Thunderstorm WarningTAE47 min
Apr 23, 11:41 AM EDTSevere Thunderstorm WarningTAE64 min
Apr 23, 11:47 AM EDTTornado WarningTAE28 min
Apr 23, 12:22 PM EDTSevere Thunderstorm WarningTAE23 min
Apr 23, 3:42 PM EDTSevere Thunderstorm WarningTAE48 min
Apr 23, 3:47 PM EDTTornado WatchSPC6 hr
Apr 23, 4:19 PM EDTSevere Thunderstorm WarningTAE56 min
Apr 23, 5:06 PM EDTSevere Thunderstorm WarningTAE39 min
Apr 23, 5:44 PM EDTSevere Thunderstorm WarningTAE61 min
Apr 23, 6:09 PM EDTMesoscale DiscussionSPC96 min
Apr 24, 11:26 AM EDTRiver Flood WarningTAE6 days
Apr 29, 7:32 PM EDTTornado Warning Tornado observedTAE28 min
Apr 29, 7:45 PM EDTMesoscale DiscussionSPC2 hr
Apr 29, 7:59 PM EDTSpecial Weather StatementTAE46 min
May 18, 2:31 PM EDTMesoscale DiscussionSPC119 min
May 20, 10:12 AM EDTMesoscale DiscussionSPC2 hr
May 21, 4:28 PM EDTSpecial Weather StatementTAE47 min
May 22, 3:51 PM EDTSevere Thunderstorm WarningTAE24 min
May 22, 4:31 PM EDTSevere Thunderstorm WarningTAE29 min
May 27, 7:49 PM EDTSpecial Weather StatementTAE41 min
Jun 6, 2:29 AM EDTFlash Flood WatchTAE42 hr
Jun 23, 12:00 PM EDTSevere Thunderstorm WarningTAE30 min
Jun 23, 12:29 PM EDTSevere Thunderstorm WarningTAE61 min
Jun 23, 3:14 PM EDTSpecial Weather StatementTAE61 min
Jun 23, 4:17 PM EDTSpecial Weather StatementTAE43 min
Jun 24, 2:36 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 24, 6:27 PM EDTMesoscale DiscussionSPC93 min
Jun 25, 2:09 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 6:25 PM EDTSpecial Weather StatementTAE35 min
Jul 1, 1:17 PM EDTMesoscale DiscussionSPC118 min
Jul 1, 2:29 PM EDTSevere Thunderstorm WarningTAE46 min
Jul 1, 2:53 PM EDTSevere Thunderstorm WarningTAE37 min
Jul 1, 3:01 PM EDTSevere Thunderstorm WarningTAE31 min
Jul 3, 4:46 PM EDTSpecial Weather StatementTAE44 min
Jul 3, 6:53 PM EDTAreal Flood AdvisoryTAE52 min
Jul 10, 3:43 AM EDTHeat AdvisoryTAE16 hr
Jul 10, 5:26 PM EDTSpecial Weather StatementTAE34 min
Jul 12, 7:15 PM EDTSpecial Weather StatementTAE90 min
Jul 12, 8:38 PM EDTSpecial Weather StatementTAE52 min
Jul 20, 6:51 PM EDTSpecial Weather StatementTAE39 min
Jul 21, 7:41 PM EDTSpecial Weather StatementTAE49 min
Jul 22, 1:26 PM EDTMesoscale DiscussionSPC2 hr
Jul 22, 5:10 PM EDTSevere Thunderstorm WarningTAE80 min
Jul 23, 1:35 PM EDTSpecial Weather StatementTAE55 min
Aug 8, 6:44 PM EDTSpecial Weather StatementTAE46 min
Aug 10, 4:55 PM EDTSpecial Weather StatementTAE50 min
Aug 10, 5:19 PM EDTSevere Thunderstorm WarningTAE41 min
Aug 10, 6:40 PM EDTSpecial Weather StatementTAE50 min
Aug 11, 1:02 PM EDTSpecial Weather StatementTAE43 min
Aug 18, 4:17 PM EDTSpecial Weather StatementTAE28 min
Aug 18, 5:46 PM EDTSpecial Weather StatementTAE44 min
Aug 19, 6:56 PM EDTSevere Thunderstorm WarningTAE49 min
Aug 19, 7:18 PM EDTSevere Thunderstorm WarningTAE27 min
Aug 19, 7:53 PM EDTSevere Thunderstorm WarningTAE25 min
Aug 24, 3:40 PM EDTMesoscale DiscussionSPC3 hr
Aug 24, 4:39 PM EDTTornado WatchSPC8 hr
Aug 24, 9:05 PM EDTMesoscale DiscussionSPC85 min
Sep 11, 5:09 PM EDTSpecial Weather StatementTAE51 min
Sep 12, 2:55 PM EDTFlash Flood WatchTAE5 days
Sep 13, 6:10 PM EDTSpecial Weather StatementTAE50 min
Sep 16, 6:55 AM EDTTornado WatchSPC14 hr
Sep 16, 12:06 PM EDTFlash Flood Warning Considerable damage threatTAE16 hr
Sep 16, 12:25 PM EDTSevere Thunderstorm WarningTAE95 min
Sep 16, 2:05 PM EDTSevere Thunderstorm WarningTAE55 min
Sep 16, 3:08 PM EDTMesoscale DiscussionSPC2 hr
Sep 17, 3:31 AM EDTAreal Flood WarningTAE7 hr
Oct 29, 12:34 AM EDTTornado WatchSPC7 hr
Oct 29, 3:11 AM EDTMesoscale DiscussionSPC94 min
Oct 29, 5:16 AM EDTMesoscale DiscussionSPC119 min
Nov 26, 9:29 PM ESTDense Fog AdvisoryTAE12 hr
Nov 30, 1:56 AM ESTMesoscale DiscussionSPC3 hr
Nov 30, 2:39 AM ESTFreeze WarningTAE30 hr
Nov 30, 2:01 PM ESTFreeze WatchTAE13 hr
Dec 1, 2:43 AM ESTFreeze WarningTAE30 hr
Dec 4, 2:37 PM ESTMesoscale DiscussionSPC2 hr
Dec 10, 2:15 PM ESTDense Fog AdvisoryTAE20 hr
Dec 12, 11:38 PM ESTDense Fog AdvisoryTAE10 hr
Dec 24, 10:58 AM ESTSpecial Weather StatementTAE92 min
Dec 25, 1:31 PM ESTHard Freeze WarningTAE19 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 archive20192021

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.