Alert archive / North Carolina / Alexander County

Weather alerts in Alexander County, North Carolina, 2012

153 weather alerts in 2012, 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 2012. Tap one for its archive.

Alerts
153
Warnings
30
Watches
17
Advisories
32
Busiest month
July39 alerts
Busiest day
February 24, 20128 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 Alexander County in 2012 had a tornado report inside them.

Alexander County, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings191237%367%30 min
Flash flood warnings220%2100%47 min

Each office's whole area, 2012

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Greenville-Spartanburg, SC: tornado warnings150100%10%
NWS Greenville-Spartanburg, SC: severe thunderstorm warnings58141029%72289%23 min
NWS Greenville-Spartanburg, SC: flash flood warnings331942%4779%46 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, 10:36 AM ESTLake Wind AdvisoryGSP55 hr
Jan 9, 9:58 PM ESTDense Fog AdvisoryGSP11 hr
Jan 10, 2:44 PM ESTFlood WatchGSP29 hr
Jan 11, 5:55 PM ESTMesoscale DiscussionSPC35 min
Jan 11, 6:05 PM ESTTornado WarningGSP40 min
Jan 11, 6:44 PM ESTSpecial Weather StatementGSP46 min
Jan 12, 4:11 AM ESTLake Wind AdvisoryGSP17 hr
Jan 12, 9:18 PM ESTWind AdvisoryGSP6 hr
Jan 13, 3:37 AM ESTLake Wind AdvisoryGSP6 hr
Jan 24, 1:20 AM ESTDense Fog AdvisoryGSP10 hr
Feb 5, 7:56 AM ESTDense Fog AdvisoryGSP3 hr
Feb 11, 4:10 AM ESTLake Wind AdvisoryGSP26 hr
Feb 15, 4:34 AM ESTDense Fog AdvisoryGSP4 hr
Feb 16, 10:23 PM ESTDense Fog AdvisoryGSP10 hr
Feb 18, 3:03 PM ESTWinter Storm WarningGSP36 hr
Feb 19, 4:40 AM ESTWinter Weather AdvisoryGSP22 hr
Feb 22, 10:34 PM ESTSpecial Weather StatementGSP41 min
Feb 23, 2:38 PM ESTWind AdvisoryGSP51 hr
Feb 24, 9:05 AM ESTMesoscale DiscussionSPC25 min
Feb 24, 9:17 AM ESTTornado WatchSPC7 hr
Feb 24, 12:00 PM ESTMesoscale DiscussionSPC60 min
Feb 24, 12:47 PM ESTSpecial Weather StatementGSP43 min
Feb 24, 2:20 PM ESTSpecial Weather StatementGSP40 min
Feb 24, 2:27 PM ESTSevere Thunderstorm WarningGSP28 min
Feb 24, 2:41 PM ESTFire Weather WatchGSP15 hr
Feb 24, 3:24 PM ESTMesoscale DiscussionSPC66 min
Feb 25, 3:31 AM ESTRed Flag WarningGSP16 hr
Feb 28, 12:49 AM ESTDense Fog AdvisoryGSP9 hr
Mar 1, 12:20 AM ESTMesoscale DiscussionSPC85 min
Mar 2, 10:49 AM ESTSpecial Weather StatementGSP41 min
Mar 2, 10:54 PM ESTTornado WatchSPC6 hr
Mar 4, 7:52 PM ESTLake Wind AdvisoryGSP22 hr
Mar 10, 2:04 AM ESTFreeze WarningGSP31 hr
Mar 14, 3:30 AM EDTDense Fog AdvisoryGSP6 hr
Mar 19, 5:59 AM EDTDense Fog AdvisoryGSP3 hr
Mar 20, 3:04 PM EDTMesoscale DiscussionSPC116 min
Mar 21, 1:22 PM EDTMesoscale DiscussionSPC113 min
Mar 23, 4:24 PM EDTSpecial Weather StatementGSP36 min
Mar 23, 6:59 PM EDTSpecial Weather StatementGSP46 min
Mar 24, 12:03 PM EDTMesoscale DiscussionSPC117 min
Mar 24, 12:46 PM EDTSevere Thunderstorm WatchSPC7 hr
Mar 24, 2:31 PM EDTMesoscale DiscussionSPC59 min
Mar 24, 6:58 PM EDTMesoscale DiscussionSPC92 min
Apr 4, 1:31 PM EDTMesoscale DiscussionSPC89 min
Apr 6, 5:33 AM EDTFrost AdvisoryGSP28 hr
Apr 9, 11:10 AM EDTFire Weather WatchGSP16 hr
Apr 9, 11:10 AM EDTRed Flag WarningGSP9 hr
Apr 10, 3:15 AM EDTRed Flag WarningGSP17 hr
Apr 10, 3:11 PM EDTFreeze WatchGSP20 hr
Apr 11, 11:06 AM EDTFreeze WarningGSP22 hr
Apr 12, 2:49 PM EDTFrost AdvisoryGSP18 hr
Apr 26, 7:24 AM EDTMesoscale DiscussionSPC96 min
Apr 26, 8:10 AM EDTSevere Thunderstorm WatchSPC3 hr
Apr 26, 8:47 AM EDTMesoscale DiscussionSPC88 min
Apr 26, 9:26 AM EDTSpecial Weather StatementGSP64 min
May 1, 12:43 PM EDTMesoscale DiscussionSPC2 hr
May 1, 3:12 PM EDTSevere Thunderstorm WatchSPC5 hr
May 9, 1:22 PM EDTAreal Flood AdvisoryGSP98 min
May 14, 5:23 PM EDTFlash Flood WatchGSP10 hr
May 14, 6:14 PM EDTMesoscale DiscussionSPC61 min
May 14, 6:31 PM EDTFlash Flood WarningGSP3 hr
May 14, 9:44 PM EDTAreal Flood WarningGSP4 hr
May 15, 10:54 AM EDTFlash Flood WatchGSP17 hr
May 15, 2:08 PM EDTMesoscale DiscussionSPC67 min
May 15, 3:13 PM EDTSevere Thunderstorm WatchSPC7 hr
May 15, 6:30 PM EDTMesoscale DiscussionSPC90 min
May 15, 8:42 PM EDTMesoscale DiscussionSPC63 min
May 22, 5:25 PM EDTSevere Thunderstorm WarningGSP65 min
May 23, 6:09 PM EDTSpecial Weather StatementGSP66 min
May 31, 6:28 PM EDTSevere Thunderstorm WarningGSP22 min
Jun 12, 8:26 PM EDTSpecial Weather StatementGSP49 min
Jun 22, 1:51 PM EDTSpecial Weather StatementGSP39 min
Jun 24, 12:53 PM EDTMesoscale DiscussionSPC97 min
Jun 29, 2:49 PM EDTHeat AdvisoryGSP29 hr
Jun 29, 9:58 PM EDTSpecial Weather StatementGSP62 min
Jun 29, 10:24 PM EDTSpecial Weather StatementGSP51 min
Jun 30, 2:44 PM EDTHeat AdvisoryGSP29 hr
Jun 30, 6:08 PM EDTSevere Thunderstorm WarningGSP67 min
Jul 1, 11:38 AM EDTMesoscale DiscussionSPC97 min
Jul 1, 1:39 PM EDTMesoscale DiscussionSPC96 min
Jul 1, 4:41 PM EDTSevere Thunderstorm WarningGSP64 min
Jul 1, 5:25 PM EDTSevere Thunderstorm WarningGSP28 min
Jul 2, 12:39 AM EDTMesoscale DiscussionSPC96 min
Jul 2, 12:57 AM EDTSevere Thunderstorm WatchSPC3 hr
Jul 2, 1:13 AM EDTSevere Thunderstorm WarningGSP62 min
Jul 3, 3:19 PM EDTSevere Thunderstorm WarningGSP56 min
Jul 3, 4:31 PM EDTSpecial Weather StatementGSP44 min
Jul 3, 6:23 PM EDTMesoscale DiscussionSPC3 hr
Jul 4, 5:19 PM EDTSpecial Weather StatementGSP41 min
Jul 5, 1:17 PM EDTSevere Thunderstorm WarningGSP53 min
Jul 5, 1:37 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 5, 2:57 PM EDTMesoscale DiscussionSPC2 hr
Jul 9, 1:01 PM EDTMesoscale DiscussionSPC89 min
Jul 18, 3:30 PM EDTSpecial Weather StatementGSP45 min
Jul 18, 3:39 PM EDTSevere Thunderstorm WarningGSP36 min
Jul 19, 6:15 PM EDTSpecial Weather StatementGSP30 min
Jul 19, 7:04 PM EDTSpecial Weather StatementGSP26 min
Jul 19, 8:24 PM EDTSpecial Weather StatementGSP51 min
Jul 19, 9:27 PM EDTSpecial Weather StatementGSP63 min
Jul 19, 9:55 PM EDTSpecial Weather StatementGSP65 min
Jul 20, 2:47 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 2:17 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 6:14 PM EDTSevere Thunderstorm WarningGSP61 min
Jul 21, 6:26 PM EDTAreal Flood AdvisoryGSP2 hr
Jul 21, 6:36 PM EDTFlash Flood WarningGSP105 min
Jul 22, 1:54 PM EDTSevere Thunderstorm WarningGSP51 min
Jul 22, 2:20 PM EDTMesoscale DiscussionSPC2 hr
Jul 22, 2:42 PM EDTSpecial Weather StatementGSP48 min
Jul 23, 12:58 PM EDTMesoscale DiscussionSPC3 hr
Jul 24, 1:12 PM EDTMesoscale DiscussionSPC93 min
Jul 24, 2:36 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 2:32 AM EDTMesoscale DiscussionSPC58 min
Jul 25, 3:11 PM EDTMesoscale DiscussionSPC3 hr
Jul 25, 5:34 PM EDTSevere Thunderstorm WarningGSP42 min
Jul 27, 4:31 PM EDTSpecial Weather StatementGSP44 min
Jul 27, 4:53 PM EDTSevere Thunderstorm WarningGSP48 min
Jul 28, 5:16 PM EDTSpecial Weather StatementGSP44 min
Aug 2, 1:15 AM EDTSpecial Weather StatementGSP45 min
Aug 2, 1:25 AM EDTSevere Thunderstorm WarningGSP65 min
Aug 2, 2:12 AM EDTAreal Flood AdvisoryGSP80 min
Aug 7, 10:35 PM EDTSpecial Weather StatementGSP40 min
Aug 8, 12:50 PM EDTSevere Thunderstorm WarningGSP40 min
Aug 9, 8:17 PM EDTSpecial Weather StatementGSP28 min
Aug 11, 3:14 PM EDTSpecial Weather StatementGSP31 min
Aug 11, 3:21 PM EDTSevere Thunderstorm WarningGSP37 min
Aug 17, 2:45 PM EDTSpecial Weather StatementGSP45 min
Aug 30, 4:54 PM EDTSpecial Weather StatementGSP51 min
Aug 30, 5:03 PM EDTSevere Thunderstorm WarningGSP27 min
Sep 1, 3:24 PM EDTSpecial Weather StatementGSP51 min
Sep 2, 4:20 PM EDTSpecial Weather StatementGSP40 min
Sep 3, 4:19 PM EDTSpecial Weather StatementGSP56 min
Sep 8, 12:20 PM EDTMesoscale DiscussionSPC115 min
Sep 8, 1:48 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 8, 3:25 PM EDTMesoscale DiscussionSPC65 min
Sep 18, 12:23 AM EDTMesoscale DiscussionSPC97 min
Sep 18, 10:32 AM EDTSpecial Weather StatementGSP43 min
Sep 18, 11:48 AM EDTSpecial Weather StatementGSP42 min
Sep 28, 1:45 PM EDTSpecial Weather StatementRNK30 min
Sep 28, 2:29 PM EDTSevere Thunderstorm WarningGSP61 min
Sep 28, 2:36 PM EDTMesoscale DiscussionSPC114 min
Sep 28, 3:11 PM EDTSpecial Weather StatementGSP49 min
Sep 29, 1:43 PM EDTSpecial Weather StatementGSP47 min
Sep 30, 5:42 AM EDTDense Fog AdvisoryGSP3 hr
Oct 28, 5:21 AM EDTHigh Wind WatchGSP11 hr
Oct 28, 3:52 PM EDTWind AdvisoryGSP43 hr
Oct 31, 4:21 AM EDTFrost AdvisoryGSP29 hr
Nov 1, 4:09 AM EDTFrost AdvisoryGSP29 hr
Nov 2, 2:46 PM EDTFrost AdvisoryGSP18 hr
Nov 6, 8:47 PM ESTFreeze WarningGSP11 hr
Dec 8, 2:30 AM ESTDense Fog AdvisoryGSP8 hr
Dec 20, 3:44 AM ESTWind AdvisoryGSP56 hr
Dec 24, 7:15 PM ESTDense Fog AdvisoryGSP15 hr
Dec 25, 3:04 PM ESTWind AdvisoryGSP27 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 archive20112013

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.