Alert archive / South Carolina / Colleton County

Weather alerts in Colleton County, South Carolina, 2019

135 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Colleton County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts
135
Warnings
41
Watches
15
Advisories
28
Busiest month
June42 alerts
Busiest day
June 22, 201912 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 3 tornado warnings covering Colleton County in 2019 had a tornado report inside them.

Colleton County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings312519%6893%33 min
Flash flood warnings00

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, SC: tornado warnings9189%475%3 min
NWS Charleston, SC: severe thunderstorm warnings1107829%42483%28 min
NWS Charleston, SC: flash flood warnings110%1100%303 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 26, 8:22 PM ESTRiver Flood WarningCHS21 days
Feb 11, 8:59 PM ESTDense Fog AdvisoryCHS15 hr
Feb 12, 6:58 PM ESTSpecial Weather StatementCHS47 min
Feb 20, 10:08 PM ESTDense Fog AdvisoryCHS12 hr
Feb 24, 3:01 AM ESTDense Fog AdvisoryCHS6 hr
Feb 28, 2:53 AM ESTDense Fog AdvisoryCHS6 hr
Mar 3, 1:51 AM ESTDense Fog AdvisoryCHS8 hr
Mar 3, 3:19 PM ESTMesoscale DiscussionSPC116 min
Mar 3, 3:35 PM ESTTornado WatchSPC7 hr
Mar 3, 5:09 PM ESTSpecial Weather StatementCHS36 min
Mar 3, 6:15 PM ESTMesoscale DiscussionSPC2 hr
Mar 3, 6:33 PM ESTTornado WarningCHS27 min
Mar 4, 3:40 PM ESTFreeze WatchCHS24 hr
Mar 5, 3:03 AM ESTFreeze WarningCHS30 hr
Mar 6, 10:02 AM ESTFreeze WarningCHS23 hr
Apr 8, 12:07 AM EDTDense Fog AdvisoryCHS10 hr
Apr 14, 5:43 PM EDTMesoscale DiscussionSPC2 hr
Apr 14, 5:48 PM EDTSevere Thunderstorm WarningCHS57 min
Apr 14, 6:31 PM EDTTornado WatchSPC3 hr
Apr 18, 4:04 PM EDTWind AdvisoryCHS25 hr
Apr 19, 10:44 AM EDTTornado WatchSPC5 hr
Apr 19, 12:49 PM EDTSevere Thunderstorm WarningCHS56 min
Apr 19, 1:19 PM EDTMesoscale DiscussionSPC86 min
Apr 19, 1:27 PM EDTTornado WarningCHS19 min
Apr 19, 1:37 PM EDTTornado WarningCHS18 min
Apr 19, 1:40 PM EDTSevere Thunderstorm WarningCHS65 min
Apr 19, 1:43 PM EDTSevere Thunderstorm WarningCHS39 min
May 4, 2:19 PM EDTSpecial Weather StatementCHS41 min
May 4, 2:49 PM EDTSevere Thunderstorm WarningCHS56 min
May 12, 11:50 AM EDTMesoscale DiscussionSPC85 min
May 12, 12:41 PM EDTSevere Thunderstorm WatchSPC6 hr
May 12, 3:04 PM EDTMesoscale DiscussionSPC56 min
May 12, 4:23 PM EDTMesoscale DiscussionSPC2 hr
May 12, 4:55 PM EDTAreal Flood AdvisoryCHS80 min
May 12, 5:26 PM EDTSpecial Weather StatementCHS34 min
May 26, 3:23 AM EDTHeat AdvisoryCHS16 hr
Jun 4, 12:43 PM EDTMesoscale DiscussionSPC92 min
Jun 4, 1:18 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 4, 3:16 PM EDTSevere Thunderstorm WarningCHS44 min
Jun 4, 3:59 PM EDTSpecial Weather StatementCHS31 min
Jun 4, 4:11 PM EDTSevere Thunderstorm WarningCHS49 min
Jun 4, 4:15 PM EDTMesoscale DiscussionSPC90 min
Jun 4, 4:58 PM EDTSevere Thunderstorm WarningCHS47 min
Jun 4, 5:48 PM EDTSpecial Weather StatementCHS27 min
Jun 4, 6:09 PM EDTSevere Thunderstorm WarningCHS51 min
Jun 4, 6:47 PM EDTAreal Flood AdvisoryCHS88 min
Jun 5, 3:13 PM EDTSevere Thunderstorm WarningCHS40 min
Jun 5, 4:09 PM EDTSpecial Weather StatementCHS51 min
Jun 6, 2:02 PM EDTSpecial Weather StatementCHS43 min
Jun 8, 8:31 PM EDTMesoscale DiscussionSPC89 min
Jun 8, 8:59 PM EDTSpecial Weather StatementCHS46 min
Jun 11, 3:04 PM EDTFlash Flood WatchCHS30 hr
Jun 12, 9:39 AM EDTAreal Flood AdvisoryCHS81 min
Jun 12, 10:59 AM EDTAreal Flood AdvisoryCHS2 hr
Jun 12, 12:59 PM EDTAreal Flood AdvisoryCHS106 min
Jun 12, 2:51 PM EDTAreal Flood AdvisoryCHS114 min
Jun 18, 10:44 PM EDTSevere Thunderstorm WarningCHS43 min
Jun 19, 5:13 PM EDTSpecial Weather StatementCHS32 min
Jun 20, 12:02 PM EDTMesoscale DiscussionSPC118 min
Jun 20, 1:44 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 20, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 20, 6:35 PM EDTSevere Thunderstorm WarningCHS55 min
Jun 20, 7:16 PM EDTMesoscale DiscussionSPC89 min
Jun 20, 7:24 PM EDTSevere Thunderstorm WarningCHS66 min
Jun 21, 3:32 PM EDTHeat AdvisoryCHS26 hr
Jun 22, 4:51 AM EDTSevere Thunderstorm WarningCHS54 min
Jun 22, 6:09 AM EDTSevere Thunderstorm WarningCHS66 min
Jun 22, 1:01 PM EDTMesoscale DiscussionSPC119 min
Jun 22, 2:08 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 22, 4:12 PM EDTSevere Thunderstorm WarningCHS63 min
Jun 22, 4:35 PM EDTMesoscale DiscussionSPC85 min
Jun 22, 4:44 PM EDTSevere Thunderstorm WarningCHS49 min
Jun 22, 4:51 PM EDTSevere Thunderstorm WarningCHS54 min
Jun 22, 5:15 PM EDTSevere Thunderstorm WarningCHS27 min
Jun 22, 5:28 PM EDTSpecial Weather StatementCHS32 min
Jun 22, 5:31 PM EDTAreal Flood AdvisoryCHS59 min
Jun 22, 5:40 PM EDTSevere Thunderstorm WarningCHS65 min
Jun 24, 3:30 AM EDTHeat AdvisoryCHS12 hr
Jul 3, 8:55 PM EDTSevere Thunderstorm WarningCHS50 min
Jul 4, 1:34 PM EDTMesoscale DiscussionSPC86 min
Jul 4, 3:54 PM EDTSevere Thunderstorm WarningCHS66 min
Jul 5, 2:03 PM EDTAreal Flood AdvisoryCHS87 min
Jul 5, 3:04 PM EDTAreal Flood AdvisoryCHS86 min
Jul 9, 3:12 PM EDTSpecial Weather StatementCHS33 min
Jul 13, 8:14 PM EDTSpecial Weather StatementCHS46 min
Jul 15, 5:37 PM EDTSevere Thunderstorm WarningCHS53 min
Jul 15, 6:09 PM EDTSevere Thunderstorm WarningCHS53 min
Jul 17, 6:33 PM EDTSevere Thunderstorm WarningCHS57 min
Jul 17, 8:17 PM EDTSpecial Weather StatementCHS28 min
Jul 17, 8:35 PM EDTSevere Thunderstorm WarningCHS55 min
Jul 18, 9:01 PM EDTSpecial Weather StatementCHS29 min
Jul 18, 9:04 PM EDTSpecial Weather StatementCHS26 min
Jul 23, 5:46 PM EDTSpecial Weather StatementCHS29 min
Jul 23, 6:12 PM EDTSpecial Weather StatementCHS33 min
Jul 23, 6:56 PM EDTSpecial Weather StatementCHS34 min
Aug 14, 2:38 PM EDTMesoscale DiscussionSPC2 hr
Aug 14, 3:41 PM EDTSevere Thunderstorm WarningCHS64 min
Aug 14, 3:49 PM EDTSevere Thunderstorm WarningCHS56 min
Aug 14, 4:09 PM EDTSevere Thunderstorm WarningCHS66 min
Aug 14, 4:51 PM EDTAreal Flood AdvisoryCHS84 min
Aug 15, 4:34 PM EDTMesoscale DiscussionSPC116 min
Aug 17, 9:36 AM EDTAreal Flood AdvisoryCHS3 hr
Aug 17, 1:58 PM EDTAreal Flood AdvisoryCHS92 min
Aug 17, 2:34 PM EDTAreal Flood AdvisoryCHS116 min
Aug 17, 4:52 PM EDTAreal Flood AdvisoryCHS83 min
Aug 21, 5:45 PM EDTSpecial Weather StatementCHS30 min
Aug 21, 6:12 PM EDTSpecial Weather StatementCHS33 min
Aug 21, 6:40 PM EDTAreal Flood AdvisoryCHS65 min
Aug 21, 6:43 PM EDTSpecial Weather StatementCHS17 min
Sep 2, 5:04 PM EDTTropical Storm WatchCHS18 hr
Sep 3, 11:14 AM EDTTropical Storm WarningCHS64 hr
Sep 3, 3:34 PM EDTFlash Flood WatchCHS49 hr
Sep 4, 9:47 AM EDTSpecial Weather StatementCHS43 min
Sep 4, 11:09 AM EDTSpecial Weather StatementCHS51 min
Sep 9, 2:45 PM EDTSevere Thunderstorm WarningCHS60 min
Sep 9, 3:07 PM EDTSpecial Weather StatementCHS23 min
Sep 9, 3:18 PM EDTSevere Thunderstorm WarningCHS57 min
Sep 9, 4:32 PM EDTSpecial Weather StatementCHS28 min
Sep 30, 6:59 PM EDTSpecial Weather StatementCHS31 min
Oct 19, 10:54 PM EDTMesoscale DiscussionSPC2 hr
Oct 31, 6:34 PM EDTMesoscale DiscussionSPC56 min
Oct 31, 7:21 PM EDTSpecial Weather StatementCHS24 min
Oct 31, 7:42 PM EDTSpecial Weather StatementCHS33 min
Oct 31, 7:58 PM EDTMesoscale DiscussionSPC62 min
Oct 31, 8:03 PM EDTSpecial Weather StatementCHS27 min
Nov 6, 12:54 AM ESTDense Fog AdvisoryCHS5 hr
Nov 8, 3:51 AM ESTFreeze WatchCHS11 hr
Nov 9, 3:38 AM ESTFreeze WatchCHS12 hr
Nov 9, 3:21 PM ESTFreeze WarningCHS17 hr
Nov 11, 3:03 PM ESTFreeze WatchCHS24 hr
Nov 12, 4:09 AM ESTFreeze WarningCHS30 hr
Dec 9, 7:27 AM ESTDense Fog AdvisoryCHS3 hr
Dec 21, 3:42 PM ESTFlash Flood WatchCHS65 hr
Dec 23, 1:55 AM ESTAreal Flood AdvisoryCHS13 hr
Dec 25, 9:52 AM ESTRiver Flood WarningCHS21 days

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 archive20182020

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.