Alert archive / North Carolina / Halifax County

Weather alerts in Halifax County, North Carolina, 2017

115 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Halifax County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
115
Warnings
20
Watches
12
Advisories
17
Busiest month
May28 alerts
Busiest day
March 31, 20176 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 Halifax County in 2017 had a tornado report inside them.

Halifax County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings11555%771%24 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Raleigh, NC: tornado warnings18194%450%20 min
NWS Raleigh, NC: severe thunderstorm warnings21113536%41889%21 min
NWS Raleigh, NC: flash flood warnings211243%3187%63 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 5, 8:29 AM ESTWinter Storm WatchRAH20 hr
Jan 5, 3:42 PM ESTWinter Storm WarningRAH48 hr
Jan 7, 2:35 AM ESTSpecial Weather StatementRAH85 min
Jan 7, 3:18 AM ESTMesoscale DiscussionSPC5 hr
Jan 7, 3:17 PM ESTWinter Weather AdvisoryRAH69 hr
Jan 11, 7:32 AM ESTSpecial Weather StatementRAH73 min
Jan 21, 12:17 AM ESTDense Fog AdvisoryRAH10 hr
Jan 21, 10:54 PM ESTDense Fog AdvisoryRAH7 hr
Feb 9, 3:41 AM ESTSpecial Weather StatementRAH49 min
Feb 12, 3:29 PM ESTMesoscale DiscussionSPC3 hr
Mar 1, 12:50 PM ESTMesoscale DiscussionSPC55 min
Mar 1, 8:16 PM ESTSpecial Weather StatementRAH44 min
Mar 28, 1:58 PM EDTMesoscale DiscussionSPC3 hr
Mar 28, 4:23 PM EDTSpecial Weather StatementRAH37 min
Mar 28, 4:30 PM EDTSevere Thunderstorm WarningRAH45 min
Mar 31, 9:57 AM EDTMesoscale DiscussionSPC2 hr
Mar 31, 2:08 PM EDTMesoscale DiscussionSPC67 min
Mar 31, 3:54 PM EDTTornado WatchSPC6 hr
Mar 31, 4:28 PM EDTSpecial Weather StatementRAH17 min
Mar 31, 5:19 PM EDTSpecial Weather StatementRAH26 min
Mar 31, 5:25 PM EDTSevere Thunderstorm WarningRAH20 min
Apr 3, 6:41 PM EDTMesoscale DiscussionSPC64 min
Apr 5, 2:53 PM EDTWind AdvisoryRAH31 hr
Apr 6, 5:59 AM EDTMesoscale DiscussionSPC91 min
Apr 6, 7:06 AM EDTTornado WatchSPC8 hr
Apr 6, 8:54 AM EDTSpecial Weather StatementRAH66 min
Apr 6, 10:38 AM EDTMesoscale DiscussionSPC67 min
Apr 6, 3:53 PM EDTWind AdvisoryRAH26 hr
Apr 21, 4:19 PM EDTMesoscale DiscussionSPC56 min
Apr 22, 3:02 PM EDTSpecial Weather StatementRAH28 min
Apr 22, 3:17 PM EDTSevere Thunderstorm WatchSPC4 hr
Apr 22, 4:11 PM EDTFlood WatchRAH64 hr
Apr 22, 4:12 PM EDTMesoscale DiscussionSPC2 hr
Apr 25, 9:39 AM EDTRiver Flood WarningRAH4 days
Apr 26, 12:38 PM EDTRiver Flood WarningRAH16 days
Apr 26, 12:38 PM EDTRiver Flood WarningRAH17 days
May 5, 2:28 AM EDTMesoscale DiscussionSPC92 min
May 5, 3:09 AM EDTTornado WatchSPC6 hr
May 5, 5:56 AM EDTMesoscale DiscussionSPC94 min
May 5, 6:17 AM EDTSevere Thunderstorm WarningRAH43 min
May 5, 6:21 AM EDTSevere Thunderstorm WarningRAH35 min
May 5, 6:15 PM EDTMesoscale DiscussionSPC90 min
May 11, 12:10 AM EDTSevere Thunderstorm WarningRAH35 min
May 11, 1:05 AM EDTSevere Thunderstorm WarningRAH40 min
May 11, 4:47 PM EDTMesoscale DiscussionSPC2 hr
May 11, 7:46 PM EDTSevere Thunderstorm WatchSPC3 hr
May 19, 2:24 PM EDTMesoscale DiscussionSPC2 hr
May 23, 3:41 AM EDTFlood WatchRAH41 hr
May 23, 7:03 PM EDTAreal Flood AdvisoryRAH3 hr
May 24, 3:13 PM EDTMesoscale DiscussionSPC2 hr
May 24, 3:46 PM EDTTornado WatchSPC6 hr
May 24, 6:51 PM EDTSevere Thunderstorm WarningRAH54 min
May 24, 6:59 PM EDTMesoscale DiscussionSPC91 min
May 24, 7:32 PM EDTTornado WarningRAH23 min
May 24, 7:35 PM EDTSevere Thunderstorm WarningRAH55 min
May 25, 12:59 PM EDTMesoscale DiscussionSPC61 min
May 25, 2:26 PM EDTSpecial Weather StatementRAH64 min
May 25, 5:37 PM EDTSpecial Weather StatementRAH68 min
May 25, 9:28 PM EDTRiver Flood WarningRAH11 days
May 27, 4:16 PM EDTMesoscale DiscussionSPC89 min
May 27, 4:43 PM EDTSevere Thunderstorm WatchSPC5 hr
May 27, 6:57 PM EDTMesoscale DiscussionSPC93 min
May 27, 9:00 PM EDTMesoscale DiscussionSPC30 min
May 31, 2:33 PM EDTMesoscale DiscussionSPC117 min
Jun 2, 5:15 AM EDTRiver Flood WarningRAH4 days
Jun 4, 9:22 PM EDTSpecial Weather StatementRAH53 min
Jun 5, 1:17 PM EDTSpecial Weather StatementRAH28 min
Jun 14, 1:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 16, 1:27 PM EDTMesoscale DiscussionSPC3 hr
Jun 16, 7:28 PM EDTSpecial Weather StatementRAH62 min
Jun 16, 9:03 PM EDTSpecial Weather StatementRAH72 min
Jun 17, 1:56 PM EDTSpecial Weather StatementRAH49 min
Jun 17, 4:22 PM EDTSpecial Weather StatementRAH68 min
Jun 20, 12:16 AM EDTAreal Flood AdvisoryRAH3 hr
Jul 1, 8:01 PM EDTSpecial Weather StatementRAH59 min
Jul 5, 4:33 PM EDTSpecial Weather StatementRAH57 min
Jul 5, 4:44 PM EDTSevere Thunderstorm WarningRAH61 min
Jul 5, 4:55 PM EDTAreal Flood AdvisoryRAH3 hr
Jul 12, 3:42 AM EDTHeat AdvisoryRAH15 hr
Jul 12, 2:38 PM EDTSpecial Weather StatementRAH37 min
Jul 13, 2:56 AM EDTHeat AdvisoryRAH16 hr
Jul 14, 3:44 AM EDTHeat AdvisoryRAH14 hr
Jul 14, 9:09 PM EDTSpecial Weather StatementRAH51 min
Jul 16, 2:39 PM EDTSpecial Weather StatementRAH66 min
Jul 20, 9:27 PM EDTHeat AdvisoryRAH23 hr
Jul 21, 3:03 PM EDTHeat AdvisoryRAH52 hr
Jul 21, 4:09 PM EDTSpecial Weather StatementRAH66 min
Jul 22, 3:39 AM EDTExcessive Heat WarningRAH39 hr
Jul 23, 12:39 PM EDTSpecial Weather StatementRAH51 min
Jul 23, 6:11 PM EDTSevere Thunderstorm WarningRAH79 min
Jul 23, 7:24 PM EDTSevere Thunderstorm WarningRAH81 min
Jul 28, 3:00 PM EDTMesoscale DiscussionSPC90 min
Jul 28, 3:01 PM EDTSpecial Weather StatementRAH44 min
Jul 28, 4:16 PM EDTSpecial Weather StatementRAH59 min
Jul 28, 4:20 PM EDTAreal Flood AdvisoryRAH115 min
Jul 28, 4:32 PM EDTMesoscale DiscussionSPC88 min
Jul 28, 7:36 PM EDTSpecial Weather StatementRAH54 min
Jul 28, 10:11 PM EDTSpecial Weather StatementRAH94 min
Aug 7, 12:16 PM EDTMesoscale DiscussionSPC2 hr
Aug 12, 12:45 PM EDTSpecial Weather StatementRAH90 min
Aug 15, 12:50 PM EDTMesoscale DiscussionSPC115 min
Aug 17, 2:14 PM EDTAreal Flood AdvisoryRAH3 hr
Aug 23, 1:23 PM EDTMesoscale DiscussionSPC3 hr
Aug 23, 4:48 PM EDTSpecial Weather StatementRAH57 min
Aug 23, 5:46 PM EDTAreal Flood AdvisoryRAH3 hr
Sep 5, 11:19 PM EDTSpecial Weather StatementRAH56 min
Sep 6, 1:29 PM EDTMesoscale DiscussionSPC3 hr
Oct 8, 12:31 PM EDTSpecial Weather StatementRAH89 min
Oct 23, 5:40 PM EDTTornado WatchSPC8 hr
Oct 23, 10:12 PM EDTSpecial Weather StatementRAH93 min
Oct 23, 10:57 PM EDTMesoscale DiscussionSPC2 hr
Oct 29, 1:53 AM EDTMesoscale DiscussionSPC2 hr
Nov 6, 2:52 AM ESTDense Fog AdvisoryRAH6 hr
Nov 9, 2:55 PM ESTFreeze WatchRAH12 hr
Nov 10, 2:30 AM ESTFreeze WarningRAH31 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 archive20162018

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.