Alert archive / North Carolina / Davidson County

Weather alerts in Davidson County, North Carolina, 2011

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

Davidson County and its neighbors

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

Alerts
222
Warnings
51
Watches
33
Advisories
31
Busiest month
June35 alerts
Busiest day
September 6, 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.

2 of 5 tornado warnings covering Davidson County in 2011 had a tornado report inside them; 5 of 5 tornado reports fell inside a warning, on average 32 minutes after it went out.

Davidson County, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings5260%5100%32 min
Severe thunderstorm warnings332427%2580%23 min
Flash flood warnings6517%5100%93 min

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Raleigh, NC: tornado warnings612264%8793%27 min
NWS Raleigh, NC: severe thunderstorm warnings36026726%78883%21 min
NWS Raleigh, NC: flash flood warnings512649%7788%77 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 7, 3:05 AM ESTWinter Weather AdvisoryRAH19 hr
Jan 8, 8:02 PM ESTWinter Storm WatchRAH19 hr
Jan 9, 3:13 PM ESTWinter Storm WarningRAH44 hr
Jan 9, 3:13 PM ESTWinter Weather AdvisoryRAH68 hr
Jan 17, 10:23 PM ESTWinter Weather AdvisoryRAH12 hr
Jan 26, 8:23 AM ESTSpecial Weather StatementRAH52 min
Feb 3, 9:50 PM ESTWinter Weather AdvisoryRAH13 hr
Feb 13, 2:12 PM ESTFire Weather WatchRAH14 hr
Feb 14, 3:59 AM ESTWind AdvisoryRAH14 hr
Feb 14, 4:12 AM ESTRed Flag WarningRAH17 hr
Feb 18, 10:12 AM ESTFire Weather WatchRAH18 hr
Feb 19, 4:02 AM ESTRed Flag WarningRAH17 hr
Feb 24, 3:10 PM ESTWind AdvisoryRAH27 hr
Feb 27, 3:27 PM ESTWind AdvisoryRAH27 hr
Feb 28, 4:36 PM ESTMesoscale DiscussionSPC84 min
Feb 28, 4:58 PM ESTSpecial Weather StatementRAH32 min
Feb 28, 5:04 PM ESTSevere Thunderstorm WatchSPC5 hr
Feb 28, 5:07 PM ESTSevere Thunderstorm WarningRAH38 min
Mar 6, 7:39 PM ESTRiver Flood WarningRAH27 hr
Mar 9, 3:42 AM ESTFlash Flood WatchRAH33 hr
Mar 22, 3:44 PM EDTFire Weather WatchRAH12 hr
Mar 23, 4:04 AM EDTRed Flag WarningRAH16 hr
Mar 23, 4:48 PM EDTMesoscale DiscussionSPC57 min
Mar 23, 5:59 PM EDTSpecial Weather StatementRAH61 min
Mar 23, 6:04 PM EDTSevere Thunderstorm WatchSPC7 hr
Mar 23, 7:10 PM EDTMesoscale DiscussionSPC65 min
Mar 23, 7:54 PM EDTSpecial Weather StatementRAH51 min
Mar 23, 10:26 PM EDTMesoscale DiscussionSPC64 min
Mar 23, 11:00 PM EDTSpecial Weather StatementRAH60 min
Mar 24, 3:57 AM EDTFrost AdvisoryRAH28 hr
Mar 27, 4:16 PM EDTFreeze WatchRAH23 hr
Mar 28, 2:46 PM EDTFreeze WarningRAH17 hr
Mar 30, 10:33 PM EDTDense Fog AdvisoryRAH8 hr
Apr 1, 2:54 PM EDTWind AdvisoryRAH27 hr
Apr 2, 3:50 AM EDTFrost AdvisoryRAH28 hr
Apr 4, 9:19 AM EDTWind AdvisoryRAH20 hr
Apr 5, 12:48 AM EDTTornado WatchSPC5 hr
Apr 5, 1:32 AM EDTSevere Thunderstorm WarningRAH43 min
Apr 5, 2:11 AM EDTSevere Thunderstorm WarningRAH49 min
Apr 5, 2:40 AM EDTTornado WarningRAH18 min
Apr 5, 7:06 AM EDTFrost AdvisoryRAH26 hr
Apr 8, 9:10 PM EDTMesoscale DiscussionSPC65 min
Apr 9, 12:42 AM EDTMesoscale DiscussionSPC93 min
Apr 9, 1:55 AM EDTSevere Thunderstorm WarningRAH35 min
Apr 9, 2:29 AM EDTSevere Thunderstorm WarningRAH36 min
Apr 9, 3:23 AM EDTMesoscale DiscussionSPC67 min
Apr 16, 8:44 AM EDTSpecial Weather StatementRAH61 min
Apr 16, 10:39 AM EDTMesoscale DiscussionSPC2 hr
Apr 16, 12:02 PM EDTTornado Watch PDSSPC11 hr
Apr 16, 12:17 PM EDTSpecial Weather StatementRAH43 min
Apr 16, 12:26 PM EDTSevere Thunderstorm WarningRAH64 min
Apr 16, 12:43 PM EDTTornado WarningRAH47 min
Apr 27, 12:51 PM EDTMesoscale DiscussionSPC84 min
Apr 27, 1:23 PM EDTTornado WatchSPC5 hr
Apr 27, 1:48 PM EDTSevere Thunderstorm WarningRAH57 min
Apr 27, 5:43 PM EDTSevere Thunderstorm WarningRAH62 min
Apr 27, 6:15 PM EDTTornado WatchSPC6 hr
Apr 27, 6:19 PM EDTTornado WarningRAH41 min
Apr 28, 12:27 AM EDTMesoscale DiscussionSPC63 min
Apr 28, 12:41 AM EDTTornado WatchSPC7 hr
Apr 28, 3:30 AM EDTSevere Thunderstorm WarningRAH60 min
Apr 28, 4:30 AM EDTTornado WatchSPC10 hr
May 3, 7:22 PM EDTMesoscale DiscussionSPC83 min
May 3, 10:55 PM EDTSpecial Weather StatementRAH65 min
May 3, 11:07 PM EDTSevere Thunderstorm WarningRAH45 min
May 4, 1:35 AM EDTAreal Flood AdvisoryRAH3 hr
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 12, 4:28 PM EDTMesoscale DiscussionSPC2 hr
May 13, 4:36 PM EDTMesoscale DiscussionSPC24 min
May 13, 4:44 PM EDTSevere Thunderstorm WatchSPC8 hr
May 13, 5:47 PM EDTSevere Thunderstorm WarningRAH58 min
May 13, 9:00 PM EDTMesoscale DiscussionSPC30 min
May 13, 9:46 PM EDTSpecial Weather StatementRAH59 min
May 13, 9:56 PM EDTSevere Thunderstorm WarningRAH34 min
May 16, 6:17 PM EDTSpecial Weather StatementRAH58 min
May 16, 6:29 PM EDTSevere Thunderstorm WarningRAH25 min
May 22, 9:48 PM EDTSpecial Weather StatementRAH72 min
May 22, 10:39 PM EDTSpecial Weather StatementRAH66 min
May 23, 2:33 PM EDTMesoscale DiscussionSPC87 min
May 23, 3:16 PM EDTSevere Thunderstorm WatchSPC7 hr
May 23, 5:21 PM EDTSevere Thunderstorm WarningRAH24 min
May 23, 7:02 PM EDTMesoscale DiscussionSPC58 min
May 24, 3:33 PM EDTMesoscale DiscussionSPC87 min
May 26, 10:59 PM EDTSevere Thunderstorm WarningRAH61 min
May 27, 12:06 PM EDTSevere Thunderstorm WatchSPC7 hr
May 27, 1:43 PM EDTSpecial Weather StatementRAH92 min
May 27, 1:52 PM EDTSevere Thunderstorm WarningRAH46 min
May 27, 2:25 PM EDTFlash Flood WatchRAH14 hr
May 27, 5:02 PM EDTSevere Thunderstorm WarningRAH43 min
May 27, 6:24 PM EDTMesoscale DiscussionSPC66 min
Jun 5, 4:15 PM EDTMesoscale DiscussionSPC60 min
Jun 7, 7:56 PM EDTSpecial Weather StatementRAH64 min
Jun 9, 1:10 PM EDTMesoscale DiscussionSPC95 min
Jun 9, 3:08 PM EDTSpecial Weather StatementRAH67 min
Jun 9, 3:19 PM EDTSevere Thunderstorm WarningRAH56 min
Jun 9, 4:08 PM EDTAreal Flood AdvisoryRAH81 min
Jun 9, 4:16 PM EDTSevere Thunderstorm WarningRAH59 min
Jun 11, 1:48 PM EDTMesoscale DiscussionSPC87 min
Jun 11, 2:34 PM EDTSpecial Weather StatementRAH41 min
Jun 11, 3:12 PM EDTSpecial Weather StatementRAH48 min
Jun 11, 4:34 PM EDTSpecial Weather StatementRAH56 min
Jun 12, 5:06 PM EDTSpecial Weather StatementRAH54 min
Jun 12, 5:38 PM EDTMesoscale DiscussionSPC67 min
Jun 18, 3:38 PM EDTSevere Thunderstorm WatchSPC4 hr
Jun 18, 4:35 PM EDTSpecial Weather StatementRAH55 min
Jun 18, 4:43 PM EDTSevere Thunderstorm WarningRAH40 min
Jun 18, 4:48 PM EDTSevere Thunderstorm WarningRAH57 min
Jun 19, 2:22 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 19, 4:13 PM EDTMesoscale DiscussionSPC62 min
Jun 21, 11:41 PM EDTSpecial Weather StatementRAH64 min
Jun 22, 4:44 PM EDTMesoscale DiscussionSPC91 min
Jun 22, 9:51 PM EDTSpecial Weather StatementRAH39 min
Jun 24, 1:05 PM EDTMesoscale DiscussionSPC2 hr
Jun 27, 1:34 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 27, 4:07 PM EDTMesoscale DiscussionSPC83 min
Jun 27, 8:07 PM EDTSpecial Weather StatementRAH68 min
Jun 27, 10:04 PM EDTSpecial Weather StatementRAH116 min
Jun 28, 2:44 PM EDTMesoscale DiscussionSPC91 min
Jun 28, 5:49 PM EDTSpecial Weather StatementRAH86 min
Jun 28, 6:50 PM EDTSevere Thunderstorm WarningRAH70 min
Jun 28, 6:51 PM EDTFlash Flood WarningRAH3 hr
Jun 28, 7:45 PM EDTSpecial Weather StatementRAH60 min
Jun 28, 8:06 PM EDTSpecial Weather StatementRAH54 min
Jun 28, 9:02 PM EDTSpecial Weather StatementRAH58 min
Jun 28, 9:38 PM EDTFlash Flood WarningRAH86 min
Jul 4, 12:50 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 4, 4:39 PM EDTSpecial Weather StatementRAH51 min
Jul 4, 5:29 PM EDTSevere Thunderstorm WarningRAH39 min
Jul 4, 6:02 PM EDTSevere Thunderstorm WarningRAH42 min
Jul 6, 12:53 PM EDTMesoscale DiscussionSPC97 min
Jul 6, 6:35 PM EDTSpecial Weather StatementRAH55 min
Jul 6, 7:59 PM EDTAreal Flood AdvisoryRAH88 min
Jul 8, 1:01 PM EDTMesoscale DiscussionSPC89 min
Jul 8, 8:40 PM EDTSpecial Weather StatementRAH80 min
Jul 8, 9:05 PM EDTAreal Flood AdvisoryRAH3 hr
Jul 8, 9:25 PM EDTSevere Thunderstorm WarningRAH65 min
Jul 8, 9:33 PM EDTFlash Flood WarningRAH3 hr
Jul 9, 12:19 AM EDTFlash Flood WarningRAH3 hr
Jul 11, 3:28 PM EDTHeat AdvisoryRAH30 hr
Jul 13, 1:43 PM EDTMesoscale DiscussionSPC92 min
Jul 13, 2:21 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 13, 4:30 PM EDTMesoscale DiscussionSPC90 min
Jul 19, 5:49 PM EDTSevere Thunderstorm WarningRAH41 min
Jul 19, 5:58 PM EDTAreal Flood AdvisoryRAH92 min
Jul 20, 3:43 PM EDTHeat AdvisoryRAH28 hr
Jul 21, 2:59 PM EDTHeat AdvisoryRAH29 hr
Jul 21, 9:31 PM EDTHeat AdvisoryRAH46 hr
Jul 24, 4:48 PM EDTSpecial Weather StatementRAH87 min
Jul 25, 3:04 PM EDTSevere Thunderstorm WarningRAH31 min
Jul 30, 2:49 PM EDTMesoscale DiscussionSPC86 min
Jul 31, 5:07 PM EDTSpecial Weather StatementRAH53 min
Jul 31, 5:17 PM EDTSevere Thunderstorm WarningRAH58 min
Jul 31, 5:20 PM EDTAreal Flood AdvisoryRAH100 min
Jul 31, 6:05 PM EDTSevere Thunderstorm WarningRAH40 min
Aug 1, 6:10 AM EDTDense Fog AdvisoryRAH3 hr
Aug 6, 4:36 PM EDTSevere Thunderstorm WarningRAH32 min
Aug 7, 12:52 PM EDTMesoscale DiscussionSPC53 min
Aug 7, 6:28 PM EDTSpecial Weather StatementRAH47 min
Aug 8, 5:31 PM EDTSpecial Weather StatementRAH44 min
Aug 11, 3:13 PM EDTSpecial Weather StatementRAH62 min
Aug 12, 1:46 PM EDTMesoscale DiscussionSPC2 hr
Aug 13, 9:01 AM EDTAreal Flood AdvisoryRAH89 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, 6:37 PM EDTMesoscale DiscussionSPC53 min
Aug 14, 7:55 PM EDTSpecial Weather StatementRAH65 min
Aug 14, 8:00 PM EDTSevere Thunderstorm WarningRAH45 min
Aug 21, 1:45 PM EDTMesoscale DiscussionSPC90 min
Aug 21, 2:06 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 6:42 PM EDTMesoscale DiscussionSPC63 min
Aug 21, 7:03 PM EDTSpecial Weather StatementRAH57 min
Sep 1, 7:14 PM EDTSpecial Weather StatementRAH46 min
Sep 2, 5:04 PM EDTSpecial Weather StatementRAH56 min
Sep 2, 5:47 PM EDTSevere Thunderstorm WarningRAH43 min
Sep 2, 5:55 PM EDTSpecial Weather StatementRAH65 min
Sep 2, 6:55 PM EDTSevere Thunderstorm WarningRAH50 min
Sep 5, 3:57 AM EDTFlash Flood WatchRAH50 hr
Sep 5, 4:08 PM EDTSpecial Weather StatementRAH52 min
Sep 5, 5:02 PM EDTSpecial Weather StatementRAH43 min
Sep 5, 6:11 PM EDTSpecial Weather StatementRAH49 min
Sep 5, 6:29 PM EDTTornado WatchSPC10 hr
Sep 5, 7:37 PM EDTMesoscale DiscussionSPC113 min
Sep 5, 8:20 PM EDTSpecial Weather StatementRAH55 min
Sep 5, 8:51 PM EDTSpecial Weather StatementRAH39 min
Sep 6, 4:36 AM EDTMesoscale DiscussionSPC84 min
Sep 6, 5:17 AM EDTTornado WatchSPC9 hr
Sep 6, 8:35 AM EDTMesoscale DiscussionSPC85 min
Sep 6, 12:41 PM EDTMesoscale DiscussionSPC64 min
Sep 6, 1:32 PM EDTTornado WatchSPC7 hr
Sep 6, 1:44 PM EDTSpecial Weather StatementRAH61 min
Sep 6, 3:19 PM EDTAreal Flood AdvisoryRAH2 hr
Sep 6, 3:39 PM EDTFlash Flood WarningRAH111 min
Sep 22, 3:31 PM EDTFlash Flood WatchRAH24 hr
Sep 23, 9:36 AM EDTSpecial Weather StatementRAH114 min
Sep 23, 10:11 AM EDTAreal Flood AdvisoryRAH109 min
Sep 23, 10:59 AM EDTFlash Flood WarningRAH3 hr
Sep 24, 7:28 AM EDTSpecial Weather StatementRAH92 min
Sep 24, 9:29 AM EDTSpecial Weather StatementRAH61 min
Sep 25, 6:04 PM EDTMesoscale DiscussionSPC116 min
Sep 25, 6:36 PM EDTAreal Flood AdvisoryRAH3 hr
Sep 27, 11:11 PM EDTSpecial Weather StatementRAH64 min
Oct 12, 4:51 AM EDTAreal Flood AdvisoryRAH2 hr
Oct 19, 5:37 PM EDTSpecial Weather StatementRAH53 min
Oct 21, 3:50 PM EDTFrost AdvisoryRAH17 hr
Oct 28, 3:42 PM EDTFreeze WatchRAH12 hr
Oct 29, 4:11 AM EDTFreeze WarningRAH29 hr
Nov 16, 4:06 PM ESTMesoscale DiscussionSPC114 min
Nov 16, 4:30 PM ESTTornado WatchSPC7 hr
Nov 16, 5:36 PM ESTTornado WarningRAH39 min
Nov 16, 6:08 PM ESTTornado WarningRAH37 min
Nov 16, 8:51 PM ESTSpecial Weather StatementRAH54 min
Nov 16, 9:25 PM ESTSpecial Weather StatementRAH80 min
Nov 16, 9:26 PM ESTSpecial Weather StatementRAH79 min
Nov 22, 3:52 AM ESTDense Fog AdvisoryRAH5 hr
Nov 22, 11:47 PM ESTSpecial Weather StatementRAH58 min
Nov 28, 9:34 PM ESTSpecial Weather StatementRAH86 min
Dec 7, 2:44 PM ESTSpecial Weather StatementRAH76 min
Dec 27, 10:26 AM ESTSpecial Weather StatementRAH119 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 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.