Alert archive / Georgia / Effingham County

Weather alerts in Effingham County, Georgia, 2021

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

Effingham County and its neighbors

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

Alerts
93
Warnings
16
Watches
14
Advisories
29
Busiest month
June25 alerts
Busiest day
June 28, 20218 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 2 tornado reports fell inside a warning.

Effingham County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings020%
Severe thunderstorm warnings5340%90%
Flash flood warnings00

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, SC: tornado warnings15287%650%6 min
NWS Charleston, SC: severe thunderstorm warnings533043%12640%19 min
NWS Charleston, SC: flash flood warnings110%333%8 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
Dec 31, 9:28 PM ESTDense Fog AdvisoryCHS13 hr
Jan 2, 12:30 PM ESTFlash Flood WatchCHS12 hr
Jan 2, 10:34 PM ESTRiver Flood WarningCHS20 days
Jan 15, 8:35 PM ESTDense Fog AdvisoryCHS3 hr
Jan 23, 12:37 AM ESTDense Fog AdvisoryCHS7 hr
Jan 27, 9:12 AM ESTSpecial Weather StatementCHS33 min
Jan 27, 9:24 AM ESTSevere Thunderstorm WarningCHS51 min
Feb 1, 8:57 AM ESTRiver Flood WarningCHS41 days
Feb 11, 6:28 PM ESTDense Fog AdvisoryCHS16 hr
Feb 15, 7:01 PM ESTSevere Thunderstorm WarningCHS29 min
Feb 17, 9:23 PM ESTRiver Flood WarningCHS25 days
Feb 18, 3:38 AM ESTDense Fog AdvisoryCHS4 hr
Feb 18, 7:15 AM ESTFlash Flood WatchCHS20 hr
Mar 7, 3:12 AM ESTFreeze WatchCHS12 hr
Mar 7, 3:22 PM ESTFreeze WarningCHS17 hr
Mar 8, 12:58 PM ESTFreeze WarningCHS19 hr
Mar 18, 11:05 AM EDTMesoscale DiscussionSPC115 min
Mar 18, 11:42 AM EDTTornado WatchSPC6 hr
Mar 26, 1:56 PM EDTMesoscale DiscussionSPC94 min
Mar 28, 5:51 PM EDTMesoscale DiscussionSPC54 min
Mar 31, 6:24 PM EDTMesoscale DiscussionSPC2 hr
Apr 1, 11:15 AM EDTRiver Flood WarningCHS21 days
Apr 2, 8:28 AM EDTFreeze WatchCHS6 hr
Apr 2, 8:28 AM EDTFreeze WarningCHS25 hr
Apr 20, 3:19 PM EDTFire Weather WatchCHS10 hr
Apr 21, 1:44 AM EDTRed Flag WarningCHS18 hr
May 6, 3:00 PM EDTFire Weather WatchCHS12 hr
May 7, 3:05 AM EDTRed Flag WarningCHS16 hr
Jun 3, 2:23 PM EDTAreal Flood AdvisoryCHS3 hr
Jun 3, 4:24 PM EDTSpecial Weather StatementCHS36 min
Jun 3, 4:56 PM EDTSpecial Weather StatementCHS34 min
Jun 3, 5:42 PM EDTAreal Flood AdvisoryCHS93 min
Jun 7, 3:40 PM EDTAreal Flood AdvisoryCHS53 min
Jun 8, 8:43 PM EDTSpecial Weather StatementCHS32 min
Jun 8, 8:57 PM EDTSpecial Weather StatementCHS33 min
Jun 9, 4:04 PM EDTAreal Flood AdvisoryCHS86 min
Jun 12, 1:14 PM EDTMesoscale DiscussionSPC3 hr
Jun 12, 5:58 PM EDTAreal Flood AdvisoryCHS2 hr
Jun 12, 7:02 PM EDTAreal Flood AdvisoryCHS118 min
Jun 15, 10:18 PM EDTSpecial Weather StatementCHS27 min
Jun 15, 10:26 PM EDTSevere Thunderstorm WarningCHS64 min
Jun 16, 1:52 PM EDTMesoscale DiscussionSPC113 min
Jun 20, 2:58 AM EDTFlash Flood WatchCHS24 hr
Jun 20, 8:40 AM EDTMesoscale DiscussionSPC3 hr
Jun 20, 9:38 PM EDTSpecial Weather StatementCHS37 min
Jun 28, 4:24 PM EDTAreal Flood AdvisoryCHS2 hr
Jun 28, 4:44 PM EDTSpecial Weather StatementCHS31 min
Jun 28, 4:59 PM EDTAreal Flood AdvisoryCHS3 hr
Jun 28, 5:18 PM EDTSpecial Weather StatementCHS27 min
Jun 28, 5:44 PM EDTSpecial Weather StatementCHS31 min
Jun 28, 6:19 PM EDTSpecial Weather StatementCHS26 min
Jun 28, 6:29 PM EDTAreal Flood AdvisoryCHS3 hr
Jun 28, 6:42 PM EDTSpecial Weather StatementCHS33 min
Jul 7, 12:28 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 1:04 PM EDTTornado WatchSPC7 hr
Jul 7, 4:47 PM EDTMesoscale DiscussionSPC118 min
Jul 7, 6:12 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 7:25 PM EDTTornado WatchSPC11 hr
Jul 7, 9:23 PM EDTAreal Flood AdvisoryCHS82 min
Jul 7, 10:00 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 10:39 PM EDTAreal Flood AdvisoryCHS81 min
Jul 11, 6:46 PM EDTSpecial Weather StatementCHS14 min
Jul 11, 6:50 PM EDTAreal Flood AdvisoryCHS55 min
Jul 11, 6:58 PM EDTSpecial Weather StatementCHS17 min
Jul 11, 7:32 PM EDTAreal Flood AdvisoryCHS58 min
Jul 11, 8:20 PM EDTAreal Flood AdvisoryCHS49 min
Jul 22, 3:19 PM EDTSevere Thunderstorm WarningCHS41 min
Jul 29, 3:36 PM EDTHeat AdvisoryCHS28 hr
Jul 30, 8:01 PM EDTHeat AdvisoryCHS24 hr
Aug 2, 6:43 PM EDTSpecial Weather StatementCHS32 min
Aug 3, 3:02 AM EDTFlash Flood WatchCHS19 hr
Aug 6, 3:43 PM EDTAreal Flood AdvisoryCHS92 min
Aug 17, 2:58 PM EDTSpecial Weather StatementCHS32 min
Aug 18, 6:25 PM EDTAreal Flood AdvisoryCHS2 hr
Sep 9, 5:53 AM EDTSpecial Weather StatementCHS22 min
Sep 9, 6:16 AM EDTSpecial Weather StatementCHS29 min
Sep 9, 6:46 AM EDTSpecial Weather StatementCHS29 min
Sep 9, 7:19 AM EDTSpecial Weather StatementCHS41 min
Sep 20, 3:16 AM EDTFlash Flood WatchCHS36 hr
Sep 22, 5:02 PM EDTSpecial Weather StatementCHS28 min
Oct 3, 6:09 AM EDTDense Fog AdvisoryCHS5 hr
Oct 5, 10:40 AM EDTSpecial Weather StatementCHS50 min
Oct 17, 10:11 AM EDTRiver Flood WarningCHS14 days
Nov 22, 3:15 AM ESTFreeze WatchCHS24 hr
Nov 22, 4:50 AM ESTDense Fog AdvisoryCHS4 hr
Nov 23, 3:07 AM ESTFreeze WarningCHS30 hr
Dec 5, 2:20 AM ESTDense Fog AdvisoryCHS7 hr
Dec 6, 1:04 AM ESTDense Fog AdvisoryCHS8 hr
Dec 17, 9:29 PM ESTDense Fog AdvisoryCHS12 hr
Dec 26, 9:48 PM ESTDense Fog AdvisoryCHS13 hr
Dec 30, 2:05 PM ESTSevere Thunderstorm WatchSPC7 hr
Dec 30, 6:35 PM ESTMesoscale DiscussionSPC115 min
Dec 30, 8:17 PM ESTSevere Thunderstorm WarningCHS43 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 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.