Alert archive / Georgia / Chattahoochee County

Weather alerts in Chattahoochee County, Georgia, 2021

102 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Chattahoochee County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
102
Warnings
11
Watches
18
Advisories
23
Busiest month
December19 alerts
Busiest day
May 3, 20217 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 Chattahoochee County in 2021 had a tornado report inside them.

Chattahoochee County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings4250%0
Flash flood warnings00

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Atlanta, GA: tornado warnings481471%4154%10 min
NWS Atlanta, GA: severe thunderstorm warnings18310045%44259%16 min
NWS Atlanta, GA: flash flood warnings563832%24470%167 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
Feb 1, 4:33 AM ESTWind AdvisoryFFC38 hr
Feb 9, 10:45 PM ESTDense Fog AdvisoryFFC12 hr
Feb 10, 10:42 PM ESTDense Fog AdvisoryFFC12 hr
Feb 12, 4:38 AM ESTDense Fog AdvisoryFFC5 hr
Feb 17, 2:20 PM ESTFlash Flood WatchFFC29 hr
Mar 16, 2:07 PM EDTMesoscale DiscussionSPC2 hr
Mar 17, 2:22 AM EDTDense Fog AdvisoryFFC9 hr
Mar 18, 12:02 AM EDTTornado WatchSPC9 hr
Mar 18, 12:44 AM EDTSpecial Weather StatementFFC31 min
Mar 18, 2:52 AM EDTMesoscale DiscussionSPC83 min
Mar 18, 4:09 AM EDTWind AdvisoryFFC16 hr
Mar 26, 11:09 AM EDTSpecial Weather StatementFFC51 min
Mar 28, 1:41 PM EDTSpecial Weather StatementFFC34 min
Mar 31, 11:57 AM EDTMesoscale DiscussionSPC93 min
Mar 31, 3:44 PM EDTSpecial Weather StatementFFC31 min
Mar 31, 4:22 PM EDTWind AdvisoryFFC27 hr
Apr 1, 2:52 AM EDTFreeze WarningFFC31 hr
Apr 1, 3:14 PM EDTFreeze WatchFFC21 hr
Apr 2, 11:49 AM EDTFreeze WarningFFC22 hr
Apr 3, 2:49 PM EDTFrost AdvisoryFFC18 hr
Apr 9, 8:38 AM EDTMesoscale DiscussionSPC3 hr
Apr 20, 2:39 PM EDTFire Weather WatchFFC15 hr
Apr 20, 2:41 PM EDTWind AdvisoryFFC31 hr
Apr 24, 4:00 PM EDTSevere Thunderstorm WatchSPC6 hr
May 3, 10:29 AM EDTTornado WatchSPC5 hr
May 3, 2:30 PM EDTSpecial Weather StatementFFC45 min
May 3, 3:05 PM EDTMesoscale DiscussionSPC55 min
May 3, 3:16 PM EDTSpecial Weather StatementFFC29 min
May 3, 3:23 PM EDTSevere Thunderstorm WatchSPC6 hr
May 3, 5:00 PM EDTMesoscale DiscussionSPC90 min
May 3, 5:40 PM EDTFlash Flood WatchFFC32 hr
May 3, 11:38 PM EDTSpecial Weather StatementFFC67 min
May 4, 6:20 PM EDTMesoscale DiscussionSPC85 min
May 4, 7:26 PM EDTSevere Thunderstorm WatchSPC6 hr
May 4, 8:25 PM EDTSevere Thunderstorm WarningFFC50 min
May 4, 8:38 PM EDTMesoscale DiscussionSPC97 min
May 5, 9:09 PM EDTRiver Flood WarningFFC33 hr
May 7, 6:39 AM EDTRiver Flood WarningFFC3 hr
May 28, 9:42 PM EDTSpecial Weather StatementFFC33 min
May 28, 10:20 PM EDTSpecial Weather StatementFFC25 min
Jun 5, 8:28 PM EDTSpecial Weather StatementFFC32 min
Jun 6, 5:56 PM EDTSpecial Weather StatementFFC34 min
Jun 11, 4:15 PM EDTSpecial Weather StatementFFC30 min
Jun 11, 4:42 PM EDTSevere Thunderstorm WarningFFC33 min
Jun 12, 1:14 PM EDTMesoscale DiscussionSPC3 hr
Jun 18, 3:46 AM EDTFlash Flood WatchFFC59 hr
Jun 19, 10:33 AM EDTTornado WatchSPC9 hr
Jun 19, 7:22 PM EDTMesoscale DiscussionSPC83 min
Jun 19, 8:00 PM EDTTornado WatchSPC13 hr
Jun 20, 12:58 AM EDTMesoscale DiscussionSPC2 hr
Jun 20, 2:36 AM EDTSpecial Weather StatementFFC24 min
Jun 20, 3:02 AM EDTSpecial Weather StatementFFC28 min
Jun 20, 3:22 AM EDTTornado WarningFFC23 min
Jul 6, 6:46 PM EDTSpecial Weather StatementFFC44 min
Jul 7, 2:44 PM EDTSpecial Weather StatementFFC61 min
Jul 9, 7:34 PM EDTSpecial Weather StatementFFC26 min
Jul 9, 7:59 PM EDTSpecial Weather StatementFFC46 min
Jul 11, 1:54 PM EDTSpecial Weather StatementFFC36 min
Jul 12, 4:47 PM EDTSpecial Weather StatementFFC43 min
Jul 27, 4:45 AM EDTHeat AdvisoryFFC15 hr
Jul 29, 5:32 AM EDTHeat AdvisoryFFC14 hr
Jul 29, 10:36 AM EDTExcessive Heat WatchFFC28 hr
Jul 29, 10:36 AM EDTHeat AdvisoryFFC33 hr
Jul 30, 2:50 PM EDTHeat AdvisoryFFC29 hr
Jul 31, 3:58 PM EDTSpecial Weather StatementFFC32 min
Jul 31, 7:26 PM EDTSpecial Weather StatementFFC34 min
Aug 1, 1:09 PM EDTMesoscale DiscussionSPC2 hr
Aug 1, 7:06 PM EDTSpecial Weather StatementFFC39 min
Aug 2, 5:21 PM EDTSpecial Weather StatementFFC39 min
Aug 9, 7:47 PM EDTSpecial Weather StatementFFC28 min
Aug 16, 4:32 AM EDTFlash Flood WatchFFC40 hr
Aug 16, 12:19 PM EDTWind AdvisoryFFC19 hr
Aug 17, 12:53 AM EDTSpecial Weather StatementFFC7 min
Aug 17, 12:54 AM EDTSpecial Weather StatementFFC21 min
Aug 25, 5:05 PM EDTSpecial Weather StatementFFC25 min
Aug 31, 8:44 AM EDTMesoscale DiscussionSPC2 hr
Aug 31, 4:49 PM EDTMesoscale DiscussionSPC116 min
Sep 19, 3:04 AM EDTFlash Flood WatchFFC47 hr
Oct 4, 11:04 AM EDTFlash Flood WatchFFC4 days
Oct 5, 10:50 AM EDTRiver Flood WarningFFC19 hr
Nov 12, 4:30 AM ESTFreeze WatchFFC26 hr
Nov 13, 6:02 AM ESTFrost AdvisoryFFC27 hr
Nov 13, 6:02 AM ESTFreeze WarningFFC27 hr
Dec 5, 3:38 AM ESTDense Fog AdvisoryFFC6 hr
Dec 6, 5:16 AM ESTDense Fog AdvisoryFFC5 hr
Dec 6, 2:08 PM ESTMesoscale DiscussionSPC2 hr
Dec 8, 11:02 PM ESTDense Fog AdvisoryFFC11 hr
Dec 11, 4:15 PM ESTSpecial Weather StatementFFC30 min
Dec 16, 9:33 PM ESTDense Fog AdvisoryFFC12 hr
Dec 17, 10:06 AM ESTDense Fog AdvisoryFFC114 min
Dec 18, 2:50 PM ESTMesoscale DiscussionSPC2 hr
Dec 25, 5:07 AM ESTDense Fog AdvisoryFFC4 hr
Dec 26, 9:22 PM ESTDense Fog AdvisoryFFC13 hr
Dec 29, 3:50 PM ESTSpecial Weather StatementFFC25 min
Dec 29, 4:17 PM ESTSpecial Weather StatementFFC28 min
Dec 29, 4:47 PM ESTSpecial Weather StatementFFC28 min
Dec 30, 11:34 AM ESTMesoscale DiscussionSPC116 min
Dec 30, 2:05 PM ESTSevere Thunderstorm WatchSPC7 hr
Dec 30, 3:54 PM ESTMesoscale DiscussionSPC2 hr
Dec 30, 3:59 PM ESTSevere Thunderstorm WarningFFC46 min
Dec 30, 4:23 PM ESTSevere Thunderstorm WarningFFC37 min
Dec 31, 3:48 AM ESTDense Fog AdvisoryFFC6 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 archive20202022

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.