Alert archive / South Carolina / Berkeley County

Weather alerts in Berkeley County, South Carolina, 2018

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

Berkeley County and its neighbors

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

Alerts
175
Warnings
31
Watches
17
Advisories
73
Busiest month
June28 alerts
Busiest day
March 20, 201811 alerts

Over time

By month

Warning verification

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

Berkeley County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings131023%1182%25 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, SC: tornado warnings40100%50%
NWS Charleston, SC: severe thunderstorm warnings704240%17464%20 min
NWS Charleston, SC: flash flood warnings2150%1100%39 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 1, 4:02 AM ESTWind Chill AdvisoryCHS30 hr
Jan 2, 3:33 AM ESTWinter Storm WatchCHS13 hr
Jan 2, 4:05 PM ESTWinter Storm WarningCHS27 hr
Jan 3, 7:09 PM ESTWinter Weather AdvisoryCHS40 hr
Jan 5, 3:32 PM ESTWind Chill AdvisoryCHS19 hr
Jan 5, 3:32 PM ESTWinter Weather AdvisoryCHS19 hr
Jan 6, 3:27 PM ESTWind Chill AdvisoryCHS19 hr
Feb 7, 12:13 PM ESTWind AdvisoryCHS5 hr
Feb 10, 12:24 AM ESTDense Fog AdvisoryCHS10 hr
Feb 10, 10:50 PM ESTRiver Flood WarningCHS12 days
Feb 12, 10:00 PM ESTLake Wind AdvisoryCHS5 hr
Feb 19, 8:33 PM ESTDense Fog AdvisoryCHS13 hr
Feb 21, 5:45 AM ESTDense Fog AdvisoryCHS4 hr
Feb 22, 5:08 AM ESTDense Fog AdvisoryCHS4 hr
Feb 24, 5:29 AM ESTDense Fog AdvisoryCHS4 hr
Feb 28, 3:28 PM ESTLake Wind AdvisoryCHS29 hr
Mar 2, 3:30 AM ESTLake Wind AdvisoryCHS16 hr
Mar 3, 10:22 AM ESTLake Wind AdvisoryCHS8 hr
Mar 4, 3:15 PM ESTFrost AdvisoryCHS18 hr
Mar 4, 5:58 PM ESTFreeze WarningCHS15 hr
Mar 6, 3:47 PM ESTLake Wind AdvisoryCHS27 hr
Mar 7, 9:20 PM ESTFrost AdvisoryCHS12 hr
Mar 8, 3:26 AM ESTFreeze WarningCHS29 hr
Mar 13, 7:55 PM EDTFreeze WarningCHS13 hr
Mar 14, 3:12 AM EDTFreeze WatchCHS9 hr
Mar 14, 12:33 PM EDTFreeze WarningCHS20 hr
Mar 14, 3:22 PM EDTFire Weather WatchCHS12 hr
Mar 15, 3:08 AM EDTRed Flag WarningCHS16 hr
Mar 20, 1:51 AM EDTSevere Thunderstorm WatchSPC4 hr
Mar 20, 3:42 AM EDTLake Wind AdvisoryCHS45 hr
Mar 20, 4:54 AM EDTMesoscale DiscussionSPC96 min
Mar 20, 5:11 AM EDTSevere Thunderstorm WarningCHS35 min
Mar 20, 12:05 PM EDTMesoscale DiscussionSPC55 min
Mar 20, 12:43 PM EDTTornado WatchSPC7 hr
Mar 20, 2:48 PM EDTMesoscale DiscussionSPC87 min
Mar 20, 3:06 PM EDTSevere Thunderstorm WarningCHS54 min
Mar 20, 3:49 PM EDTSpecial Weather StatementCHS26 min
Mar 20, 5:45 PM EDTSevere Thunderstorm WarningCHS43 min
Mar 20, 6:10 PM EDTMesoscale DiscussionSPC65 min
Mar 22, 9:50 AM EDTFreeze WatchCHS5 hr
Mar 22, 2:56 PM EDTFreeze WarningCHS18 hr
Apr 7, 3:36 PM EDTLake Wind AdvisoryCHS16 hr
Apr 15, 3:21 AM EDTWind AdvisoryCHS15 hr
Apr 15, 12:13 PM EDTTornado WatchSPC9 hr
Apr 15, 3:17 PM EDTMesoscale DiscussionSPC88 min
Apr 15, 3:23 PM EDTSpecial Weather StatementCHS52 min
Apr 15, 4:32 PM EDTSpecial Weather StatementCHS28 min
Apr 15, 5:45 PM EDTMesoscale DiscussionSPC90 min
Apr 15, 6:39 PM EDTLake Wind AdvisoryCHS23 hr
Apr 15, 6:45 PM EDTSpecial Weather StatementCHS45 min
Apr 15, 7:28 PM EDTSpecial Weather StatementCHS47 min
Apr 19, 9:10 PM EDTLake Wind AdvisoryCHS13 hr
Apr 23, 3:10 AM EDTLake Wind AdvisoryCHS16 hr
Apr 23, 4:30 PM EDTAreal Flood AdvisoryCHS6 hr
Apr 24, 12:08 AM EDTSpecial Weather StatementCHS37 min
Apr 24, 12:43 AM EDTSpecial Weather StatementCHS32 min
Apr 24, 2:06 AM EDTSpecial Weather StatementCHS24 min
Apr 25, 8:32 AM EDTRiver Flood WarningCHS14 days
May 19, 11:59 AM EDTAreal Flood AdvisoryCHS91 min
May 23, 4:02 PM EDTSpecial Weather StatementCHS28 min
May 24, 8:39 PM EDTRiver Flood WarningCHS24 days
May 30, 3:12 PM EDTAreal Flood AdvisoryCHS63 min
May 31, 5:42 PM EDTAreal Flood AdvisoryCHS63 min
Jun 2, 1:19 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 2, 6:36 PM EDTSevere Thunderstorm WarningCHS54 min
Jun 2, 7:19 PM EDTSpecial Weather StatementCHS26 min
Jun 12, 12:25 AM EDTAreal Flood AdvisoryCHS65 min
Jun 12, 1:56 PM EDTAreal Flood AdvisoryCHS46 min
Jun 14, 4:20 PM EDTSpecial Weather StatementCHS40 min
Jun 14, 4:29 PM EDTSevere Thunderstorm WarningCHS61 min
Jun 15, 2:58 PM EDTMesoscale DiscussionSPC2 hr
Jun 15, 10:37 PM EDTSpecial Weather StatementCHS23 min
Jun 15, 11:02 PM EDTSpecial Weather StatementCHS43 min
Jun 19, 3:28 AM EDTHeat AdvisoryCHS15 hr
Jun 20, 3:18 AM EDTHeat AdvisoryCHS15 hr
Jun 20, 7:18 PM EDTSpecial Weather StatementCHS42 min
Jun 20, 7:29 PM EDTSevere Thunderstorm WarningCHS42 min
Jun 21, 3:16 AM EDTHeat AdvisoryCHS15 hr
Jun 22, 3:25 AM EDTHeat AdvisoryCHS15 hr
Jun 23, 3:26 AM EDTHeat AdvisoryCHS16 hr
Jun 23, 2:12 PM EDTHeat AdvisoryCHS30 hr
Jun 23, 3:38 PM EDTMesoscale DiscussionSPC67 min
Jun 24, 9:38 PM EDTSevere Thunderstorm WarningCHS52 min
Jun 24, 10:37 PM EDTSpecial Weather StatementCHS38 min
Jun 25, 3:34 AM EDTHeat AdvisoryCHS13 hr
Jun 25, 4:38 PM EDTSevere Thunderstorm WarningCHS51 min
Jun 26, 6:22 PM EDTMesoscale DiscussionSPC113 min
Jun 26, 10:34 PM EDTSpecial Weather StatementCHS26 min
Jun 27, 9:26 PM EDTSpecial Weather StatementCHS49 min
Jun 27, 10:17 PM EDTSpecial Weather StatementCHS43 min
Jun 27, 10:47 PM EDTSpecial Weather StatementCHS43 min
Jul 7, 2:31 PM EDTAreal Flood AdvisoryCHS59 min
Jul 7, 2:53 PM EDTAreal Flood AdvisoryCHS97 min
Jul 12, 6:49 PM EDTSevere Thunderstorm WarningCHS56 min
Jul 16, 11:19 PM EDTSpecial Weather StatementCHS41 min
Jul 18, 5:27 PM EDTAreal Flood AdvisoryCHS45 min
Jul 20, 3:28 AM EDTFlash Flood WatchCHS15 hr
Jul 20, 6:23 AM EDTAreal Flood AdvisoryCHS82 min
Jul 22, 2:29 AM EDTSpecial Weather StatementCHS46 min
Jul 22, 2:46 AM EDTSevere Thunderstorm WarningCHS59 min
Jul 22, 3:35 AM EDTMesoscale DiscussionSPC2 hr
Jul 23, 3:44 AM EDTSpecial Weather StatementCHS31 min
Jul 23, 1:24 PM EDTMesoscale DiscussionSPC3 hr
Jul 23, 9:55 PM EDTAreal Flood AdvisoryCHS110 min
Jul 23, 11:29 PM EDTAreal Flood AdvisoryCHS2 hr
Jul 24, 1:44 PM EDTSpecial Weather StatementCHS46 min
Jul 24, 6:01 PM EDTAreal Flood AdvisoryCHS89 min
Jul 25, 6:38 PM EDTSpecial Weather StatementCHS52 min
Jul 26, 1:50 PM EDTSpecial Weather StatementCHS25 min
Jul 26, 1:57 PM EDTAreal Flood AdvisoryCHS93 min
Jul 26, 2:14 PM EDTSpecial Weather StatementCHS46 min
Jul 26, 3:02 PM EDTSpecial Weather StatementCHS43 min
Jul 26, 3:12 PM EDTAreal Flood AdvisoryCHS93 min
Jul 26, 3:45 PM EDTSpecial Weather StatementCHS30 min
Jul 26, 4:29 PM EDTAreal Flood AdvisoryCHS56 min
Jul 30, 6:31 AM EDTAreal Flood AdvisoryCHS65 min
Aug 2, 10:13 PM EDTFlash Flood WatchCHS21 hr
Aug 5, 8:56 PM EDTSpecial Weather StatementCHS34 min
Aug 5, 9:36 PM EDTSpecial Weather StatementCHS24 min
Aug 6, 11:03 AM EDTRiver Flood WarningCHS26 hr
Aug 9, 6:10 PM EDTMesoscale DiscussionSPC2 hr
Aug 9, 7:50 PM EDTSevere Thunderstorm WarningCHS55 min
Aug 9, 8:20 PM EDTSevere Thunderstorm WarningCHS55 min
Aug 13, 6:35 PM EDTAreal Flood AdvisoryCHS55 min
Aug 13, 7:29 PM EDTAreal Flood AdvisoryCHS91 min
Aug 13, 8:05 PM EDTSpecial Weather StatementCHS40 min
Aug 13, 8:59 PM EDTAreal Flood AdvisoryCHS27 min
Aug 14, 3:14 PM EDTSpecial Weather StatementCHS46 min
Aug 14, 4:00 PM EDTSpecial Weather StatementCHS45 min
Aug 14, 4:19 PM EDTSevere Thunderstorm WarningCHS56 min
Aug 14, 5:15 PM EDTSpecial Weather StatementCHS30 min
Aug 14, 6:10 PM EDTAreal Flood AdvisoryCHS95 min
Aug 15, 7:43 PM EDTSpecial Weather StatementCHS32 min
Aug 18, 7:57 PM EDTSpecial Weather StatementCHS48 min
Sep 7, 2:47 PM EDTSpecial Weather StatementCHS43 min
Sep 11, 5:25 AM EDTHurricane WatchCHS3 days
Sep 13, 11:00 AM EDTTropical Storm WarningCHS52 hr
Sep 13, 5:27 PM EDTFlash Flood WatchCHS41 hr
Sep 14, 11:05 AM EDTRiver Flood WarningCHS7 days
Sep 15, 3:18 PM EDTLake Wind AdvisoryCHS76 min
Sep 16, 4:45 PM EDTAreal Flood AdvisoryCHS2 hr
Sep 16, 8:38 PM EDTAreal Flood AdvisoryCHS82 min
Sep 29, 3:27 PM EDTSpecial Weather StatementCHS33 min
Oct 7, 7:10 AM EDTDense Fog AdvisoryCHS3 hr
Oct 9, 5:15 AM EDTTropical Storm WatchCHS12 hr
Oct 9, 4:11 PM EDTTropical Storm WarningCHS52 hr
Oct 10, 12:08 PM EDTAreal Flood AdvisoryCHS82 min
Oct 10, 1:06 PM EDTAreal Flood AdvisoryCHS57 min
Oct 10, 4:50 PM EDTMesoscale DiscussionSPC2 hr
Oct 10, 11:08 PM EDTMesoscale DiscussionSPC97 min
Oct 10, 11:38 PM EDTTornado WatchSPC7 hr
Oct 11, 4:34 AM EDTMesoscale DiscussionSPC56 min
Oct 11, 10:31 AM EDTRiver Flood WarningCHS11 days
Oct 11, 4:52 PM EDTLake Wind AdvisoryCHS3 hr
Oct 20, 4:00 AM EDTWind AdvisoryCHS3 hr
Oct 20, 7:18 AM EDTLake Wind AdvisoryCHS31 hr
Oct 31, 10:04 PM EDTRiver Flood WarningCHS9 days
Nov 2, 9:51 PM EDTLake Wind AdvisoryCHS6 hr
Nov 13, 10:28 AM ESTRiver Flood WarningCHS139 days
Nov 16, 2:46 PM ESTFrost AdvisoryCHS17 hr
Nov 26, 3:40 AM ESTFreeze WatchCHS24 hr
Nov 26, 3:40 AM ESTLake Wind AdvisoryCHS19 hr
Nov 27, 3:21 AM ESTFreeze WarningCHS30 hr
Nov 27, 2:30 PM ESTLake Wind AdvisoryCHS13 hr
Dec 2, 7:37 AM ESTAreal Flood AdvisoryCHS2 hr
Dec 2, 9:44 AM ESTAreal Flood AdvisoryCHS2 hr
Dec 8, 3:42 PM ESTLake Wind AdvisoryCHS27 hr
Dec 14, 3:23 AM ESTFlash Flood WatchCHS27 hr
Dec 14, 9:18 AM ESTAreal Flood AdvisoryCHS117 min
Dec 19, 9:35 PM ESTFlash Flood WatchCHS19 hr
Dec 20, 3:24 PM ESTLake Wind AdvisoryCHS18 hr
Dec 20, 3:24 PM ESTWind AdvisoryCHS27 hr
Dec 20, 3:36 PM ESTSpecial Weather StatementCHS24 min
Dec 21, 5:52 PM ESTLake Wind AdvisoryCHS7 hr
Dec 30, 2:54 PM ESTDense Fog AdvisoryCHS21 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.