Alert archive / North Carolina / Alexander County

Weather alerts in Alexander County, North Carolina, 2011

192 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Alexander County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts
192
Warnings
45
Watches
27
Advisories
49
Busiest month
May36 alerts
Busiest day
May 11, 201110 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 1 tornado warnings covering Alexander County in 2011 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 42 minutes after it went out.

Alexander County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings110%2100%42 min
Severe thunderstorm warnings393413%1894%20 min
Flash flood warnings00

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Greenville-Spartanburg, SC: tornado warnings421174%2596%21 min
NWS Greenville-Spartanburg, SC: severe thunderstorm warnings69355120%1,30989%26 min
NWS Greenville-Spartanburg, SC: flash flood warnings312035%4685%105 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, 4:40 AM ESTDense Fog AdvisoryGSP5 hr
Jan 1, 7:59 PM ESTDense Fog AdvisoryGSP8 hr
Jan 6, 3:56 AM ESTWinter Weather AdvisoryGSP59 hr
Jan 8, 3:32 AM ESTLake Wind AdvisoryGSP14 hr
Jan 8, 4:20 AM ESTWinter Storm WatchGSP35 hr
Jan 9, 3:53 AM ESTWinter Storm WarningGSP53 hr
Jan 11, 3:47 AM ESTWinter Weather AdvisoryGSP56 hr
Jan 17, 2:51 PM ESTWinter Weather AdvisoryGSP18 hr
Feb 1, 2:45 PM ESTLake Wind AdvisoryGSP27 hr
Feb 3, 3:22 PM ESTFreezing Rain AdvisoryGSP24 hr
Feb 9, 10:58 AM ESTWinter Weather AdvisoryGSP16 hr
Feb 13, 2:42 PM ESTFire Weather WatchGSP12 hr
Feb 14, 2:17 AM ESTRed Flag WarningGSP19 hr
Feb 14, 3:40 AM ESTWind AdvisoryGSP20 hr
Feb 18, 3:19 PM ESTFire Weather WatchGSP13 hr
Feb 19, 4:24 AM ESTRed Flag WarningGSP17 hr
Feb 24, 2:18 PM ESTLake Wind AdvisoryGSP28 hr
Feb 25, 4:41 AM ESTWind AdvisoryGSP13 hr
Feb 27, 8:21 PM ESTLake Wind AdvisoryGSP23 hr
Feb 28, 1:29 PM ESTTornado WatchSPC7 hr
Feb 28, 4:09 PM ESTSevere Thunderstorm WarningGSP66 min
Feb 28, 4:36 PM ESTMesoscale DiscussionSPC84 min
Feb 28, 4:39 PM ESTSevere Thunderstorm WarningGSP38 min
Feb 28, 11:37 PM ESTDense Fog AdvisoryGSP3 hr
Mar 5, 3:31 AM ESTLake Wind AdvisoryGSP37 hr
Mar 6, 9:35 AM ESTAreal Flood AdvisoryGSP6 hr
Mar 8, 2:57 AM ESTFlood WatchGSP58 hr
Mar 10, 4:37 AM ESTDense Fog AdvisoryGSP4 hr
Mar 22, 3:51 PM EDTFire Weather WatchGSP11 hr
Mar 23, 2:45 AM EDTLake Wind AdvisoryGSP24 hr
Mar 23, 2:54 AM EDTRed Flag WarningGSP17 hr
Mar 23, 3:45 PM EDTTornado WatchSPC6 hr
Mar 23, 4:48 PM EDTMesoscale DiscussionSPC57 min
Mar 23, 7:10 PM EDTMesoscale DiscussionSPC65 min
Mar 23, 8:39 PM EDTMesoscale DiscussionSPC66 min
Mar 23, 10:48 PM EDTSpecial Weather StatementGSP42 min
Mar 24, 3:09 AM EDTFrost AdvisoryGSP30 hr
Mar 28, 2:51 PM EDTFrost AdvisoryGSP18 hr
Apr 1, 2:51 PM EDTLake Wind AdvisoryGSP29 hr
Apr 3, 2:44 PM EDTLake Wind AdvisoryGSP51 hr
Apr 4, 10:41 AM EDTWind AdvisoryGSP17 hr
Apr 4, 9:32 PM EDTMesoscale DiscussionSPC58 min
Apr 4, 9:45 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 5, 12:22 AM EDTSevere Thunderstorm WarningGSP53 min
Apr 5, 1:14 AM EDTSevere Thunderstorm WarningGSP61 min
Apr 5, 4:08 AM EDTFrost AdvisoryGSP29 hr
Apr 9, 12:42 AM EDTMesoscale DiscussionSPC93 min
Apr 9, 3:23 AM EDTMesoscale DiscussionSPC67 min
Apr 9, 2:44 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 9, 6:17 PM EDTSevere Thunderstorm WarningGSP28 min
Apr 10, 3:29 AM EDTDense Fog AdvisoryGSP7 hr
Apr 12, 1:21 AM EDTLake Wind AdvisoryGSP19 hr
Apr 12, 2:39 AM EDTMesoscale DiscussionSPC36 min
Apr 12, 3:46 AM EDTSevere Thunderstorm WarningGSP35 min
Apr 15, 4:10 AM EDTLake Wind AdvisoryGSP36 hr
Apr 16, 5:57 AM EDTTornado WatchSPC8 hr
Apr 16, 11:31 AM EDTSpecial Weather StatementGSP29 min
Apr 16, 3:52 PM EDTLake Wind AdvisoryGSP14 hr
Apr 16, 3:52 PM EDTWind AdvisoryGSP4 hr
Apr 27, 3:27 AM EDTLake Wind AdvisoryGSP28 hr
Apr 27, 6:41 PM EDTMesoscale DiscussionSPC34 min
Apr 27, 6:52 PM EDTTornado Watch PDSSPC9 hr
Apr 28, 12:09 AM EDTMesoscale DiscussionSPC36 min
Apr 28, 12:56 AM EDTTornado WatchSPC4 hr
Apr 28, 2:56 AM EDTTornado WarningGSP64 min
Apr 28, 3:30 AM EDTMesoscale DiscussionSPC90 min
Apr 28, 6:04 AM EDTSevere Thunderstorm WarningGSP29 min
May 3, 7:12 PM EDTSevere Thunderstorm WarningGSP63 min
May 3, 7:22 PM EDTMesoscale DiscussionSPC83 min
May 3, 8:11 PM EDTSevere Thunderstorm WarningGSP64 min
May 10, 2:18 PM EDTMesoscale DiscussionSPC87 min
May 10, 3:20 PM EDTSevere Thunderstorm WatchSPC8 hr
May 10, 6:02 PM EDTMesoscale DiscussionSPC58 min
May 10, 9:01 PM EDTMesoscale DiscussionSPC59 min
May 10, 10:18 PM EDTMesoscale DiscussionSPC27 min
May 10, 10:42 PM EDTSevere Thunderstorm WatchSPC4 hr
May 10, 10:54 PM EDTSevere Thunderstorm WarningGSP66 min
May 10, 11:36 PM EDTAreal Flood AdvisoryGSP4 hr
May 10, 11:55 PM EDTSevere Thunderstorm WarningGSP65 min
May 11, 12:14 AM EDTMesoscale DiscussionSPC61 min
May 11, 2:37 AM EDTMesoscale DiscussionSPC23 min
May 11, 4:51 AM EDTSpecial Weather StatementGSP39 min
May 11, 5:26 AM EDTSpecial Weather StatementGSP49 min
May 12, 4:28 PM EDTMesoscale DiscussionSPC2 hr
May 13, 1:10 PM EDTSevere Thunderstorm WatchSPC6 hr
May 13, 4:36 PM EDTMesoscale DiscussionSPC24 min
May 13, 7:32 PM EDTSpecial Weather StatementGSP43 min
May 13, 8:07 PM EDTSevere Thunderstorm WarningGSP53 min
May 14, 7:56 PM EDTSpecial Weather StatementGSP49 min
May 22, 5:40 PM EDTSevere Thunderstorm WatchSPC5 hr
May 22, 7:26 PM EDTMesoscale DiscussionSPC2 hr
May 22, 8:20 PM EDTSevere Thunderstorm WarningGSP55 min
May 22, 8:54 PM EDTSevere Thunderstorm WarningGSP66 min
May 22, 9:02 PM EDTMesoscale DiscussionSPC58 min
May 23, 3:16 PM EDTSevere Thunderstorm WatchSPC7 hr
May 24, 8:34 AM EDTMesoscale DiscussionSPC116 min
May 24, 3:33 PM EDTMesoscale DiscussionSPC87 min
May 24, 7:28 PM EDTSevere Thunderstorm WarningGSP62 min
May 24, 8:24 PM EDTSpecial Weather StatementGSP51 min
May 26, 5:10 PM EDTSevere Thunderstorm WatchSPC7 hr
May 26, 7:12 PM EDTMesoscale DiscussionSPC93 min
May 26, 8:57 PM EDTSevere Thunderstorm WarningGSP63 min
May 26, 9:37 PM EDTSevere Thunderstorm WarningGSP98 min
Jun 1, 4:35 PM EDTMesoscale DiscussionSPC85 min
Jun 5, 4:15 PM EDTMesoscale DiscussionSPC60 min
Jun 5, 4:20 PM EDTSpecial Weather StatementGSP40 min
Jun 5, 4:39 PM EDTSevere Thunderstorm WarningGSP66 min
Jun 5, 4:51 PM EDTSevere Thunderstorm WarningGSP54 min
Jun 5, 10:25 PM EDTSpecial Weather StatementGSP35 min
Jun 7, 6:04 PM EDTMesoscale DiscussionSPC116 min
Jun 7, 8:00 PM EDTSpecial Weather StatementGSP45 min
Jun 7, 8:41 PM EDTSpecial Weather StatementGSP64 min
Jun 9, 1:10 PM EDTMesoscale DiscussionSPC95 min
Jun 9, 3:06 PM EDTSevere Thunderstorm WarningGSP54 min
Jun 11, 1:48 PM EDTMesoscale DiscussionSPC87 min
Jun 11, 5:48 PM EDTSevere Thunderstorm WarningGSP57 min
Jun 11, 6:53 PM EDTSevere Thunderstorm WarningGSP67 min
Jun 12, 6:12 PM EDTSevere Thunderstorm WarningGSP63 min
Jun 18, 11:05 AM EDTSevere Thunderstorm WatchSPC9 hr
Jun 18, 2:21 PM EDTMesoscale DiscussionSPC84 min
Jun 18, 2:59 PM EDTSevere Thunderstorm WarningGSP61 min
Jun 20, 12:46 PM EDTMesoscale DiscussionSPC59 min
Jun 21, 2:11 PM EDTMesoscale DiscussionSPC64 min
Jun 21, 5:33 PM EDTSevere Thunderstorm WarningGSP42 min
Jun 22, 5:38 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 22, 8:49 PM EDTSevere Thunderstorm WarningGSP56 min
Jun 22, 9:34 PM EDTSpecial Weather StatementGSP41 min
Jun 24, 1:05 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 4:07 PM EDTMesoscale DiscussionSPC83 min
Jun 28, 2:44 PM EDTMesoscale DiscussionSPC91 min
Jun 28, 5:41 PM EDTSevere Thunderstorm WarningGSP49 min
Jun 28, 6:04 PM EDTSevere Thunderstorm WarningGSP41 min
Jul 4, 12:50 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 4, 3:54 PM EDTSpecial Weather StatementGSP36 min
Jul 4, 4:09 PM EDTSevere Thunderstorm WarningGSP66 min
Jul 4, 4:23 PM EDTSevere Thunderstorm WarningGSP67 min
Jul 5, 4:07 AM EDTDense Fog AdvisoryGSP5 hr
Jul 7, 4:06 PM EDTSpecial Weather StatementGSP24 min
Jul 7, 4:54 PM EDTSevere Thunderstorm WarningGSP48 min
Jul 8, 1:01 PM EDTMesoscale DiscussionSPC89 min
Jul 8, 8:03 PM EDTSpecial Weather StatementGSP27 min
Jul 11, 2:33 PM EDTHeat AdvisoryGSP30 hr
Jul 13, 1:43 PM EDTMesoscale DiscussionSPC92 min
Jul 13, 2:21 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 13, 2:28 PM EDTSpecial Weather StatementGSP47 min
Jul 13, 2:32 PM EDTSevere Thunderstorm WarningGSP58 min
Jul 20, 2:37 PM EDTHeat AdvisoryGSP30 hr
Jul 21, 2:49 PM EDTHeat AdvisoryGSP29 hr
Jul 23, 1:53 PM EDTSpecial Weather StatementGSP37 min
Jul 24, 2:59 PM EDTSpecial Weather StatementGSP46 min
Jul 24, 3:31 PM EDTSevere Thunderstorm WarningGSP59 min
Jul 30, 2:49 PM EDTMesoscale DiscussionSPC86 min
Aug 11, 2:11 PM EDTSpecial Weather StatementGSP49 min
Aug 11, 2:25 PM EDTMesoscale DiscussionSPC65 min
Aug 12, 1:46 PM EDTMesoscale DiscussionSPC2 hr
Aug 12, 4:22 PM EDTSpecial Weather StatementRNK23 min
Aug 13, 3:11 PM EDTSevere Thunderstorm WarningGSP64 min
Aug 13, 4:20 PM EDTMesoscale DiscussionSPC115 min
Aug 14, 1:50 PM EDTMesoscale DiscussionSPC55 min
Aug 14, 2:07 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 14, 6:15 PM EDTSevere Thunderstorm WarningGSP60 min
Aug 14, 6:33 PM EDTSevere Thunderstorm WarningGSP57 min
Aug 14, 6:37 PM EDTMesoscale DiscussionSPC53 min
Aug 18, 2:59 PM EDTMesoscale DiscussionSPC2 hr
Aug 18, 5:05 PM EDTSpecial Weather StatementGSP40 min
Aug 18, 5:10 PM EDTSevere Thunderstorm WarningGSP65 min
Aug 18, 5:52 PM EDTSevere Thunderstorm WarningGSP53 min
Aug 27, 3:29 AM EDTLake Wind AdvisoryGSP15 hr
Sep 2, 2:31 PM EDTMesoscale DiscussionSPC59 min
Sep 2, 6:17 PM EDTSevere Thunderstorm WarningGSP58 min
Sep 4, 12:33 PM EDTFlash Flood WatchGSP51 hr
Sep 5, 3:42 PM EDTTornado WatchSPC7 hr
Sep 5, 7:37 PM EDTMesoscale DiscussionSPC113 min
Sep 5, 9:16 PM EDTSpecial Weather StatementGSP44 min
Sep 6, 9:51 AM EDTTornado WatchSPC6 hr
Sep 15, 2:51 PM EDTLake Wind AdvisoryGSP13 hr
Sep 30, 3:22 PM EDTLake Wind AdvisoryGSP36 hr
Oct 13, 2:47 PM EDTLake Wind AdvisoryGSP28 hr
Oct 19, 3:40 AM EDTLake Wind AdvisoryGSP39 hr
Oct 21, 2:30 PM EDTFrost AdvisoryGSP20 hr
Oct 22, 2:55 PM EDTFrost AdvisoryGSP18 hr
Oct 28, 3:25 PM EDTFreeze WatchGSP13 hr
Oct 29, 4:45 AM EDTFreeze WarningGSP28 hr
Nov 4, 4:21 AM EDTLake Wind AdvisoryGSP15 hr
Nov 16, 4:06 PM ESTMesoscale DiscussionSPC114 min
Nov 22, 3:52 AM ESTDense Fog AdvisoryGSP4 hr
Dec 5, 10:39 PM ESTDense Fog AdvisoryGSP7 hr
Dec 7, 3:39 AM ESTLake Wind AdvisoryGSP18 hr
Dec 7, 5:24 PM ESTSpecial Weather StatementGSP36 min
Dec 21, 9:24 PM ESTDense Fog AdvisoryGSP13 hr
Dec 22, 4:13 AM ESTDense Fog AdvisoryGSP6 hr
Dec 27, 3:29 AM ESTLake Wind AdvisoryGSP15 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 archive20102012

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.