Alert archive / Virginia / King William County

Weather alerts in King William County, Virginia, 2019

128 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

King William County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts
128
Warnings
29
Watches
15
Advisories
18
Busiest month
August28 alerts
Busiest day
April 15, 20198 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 4 tornado warnings covering King William County in 2019 had a tornado report inside them.

King William County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings40100%0
Severe thunderstorm warnings18176%475%12 min
Flash flood warnings00

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Wakefield, VA: tornado warnings591575%2882%13 min
NWS Wakefield, VA: severe thunderstorm warnings32723728%50986%20 min
NWS Wakefield, VA: flash flood warnings181328%3382%92 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 11, 3:36 AM ESTWinter Storm WatchAKQ24 hr
Jan 11, 9:59 PM ESTWinter Storm WarningAKQ51 hr
Jan 12, 3:46 AM ESTWinter Weather AdvisoryAKQ48 hr
Jan 20, 3:29 AM ESTWind Chill AdvisoryAKQ32 hr
Jan 30, 3:42 AM ESTWind Chill AdvisoryAKQ29 hr
Jan 30, 3:46 AM ESTWind AdvisoryAKQ14 hr
Feb 7, 8:29 PM ESTDense Fog AdvisoryAKQ8 hr
Feb 19, 3:36 AM ESTWinter Weather AdvisoryAKQ42 hr
Feb 24, 4:46 PM ESTAreal Flood WarningAKQ3 days
Feb 27, 10:12 PM ESTAreal Flood WarningAKQ30 hr
Mar 1, 4:16 AM ESTAreal Flood WarningAKQ12 hr
Mar 19, 10:03 AM EDTSpecial Weather StatementAKQ12 min
Mar 21, 1:18 PM EDTSpecial Weather StatementAKQ42 min
Mar 22, 5:54 PM EDTSpecial Weather StatementAKQ36 min
Apr 8, 2:32 PM EDTSevere Thunderstorm WatchSPC7 hr
Apr 8, 6:24 PM EDTSevere Thunderstorm WarningAKQ30 min
Apr 8, 7:01 PM EDTSpecial Weather StatementAKQ44 min
Apr 14, 5:49 PM EDTMesoscale DiscussionSPC26 min
Apr 15, 12:07 AM EDTMesoscale DiscussionSPC113 min
Apr 15, 12:41 AM EDTTornado WatchSPC5 hr
Apr 15, 1:36 AM EDTTornado WarningAKQ24 min
Apr 15, 1:50 AM EDTSevere Thunderstorm WarningAKQ40 min
Apr 15, 1:53 AM EDTTornado WarningAKQ52 min
Apr 15, 2:16 AM EDTTornado WarningAKQ29 min
Apr 15, 2:30 AM EDTMesoscale DiscussionSPC60 min
Apr 15, 2:32 AM EDTSevere Thunderstorm WarningAKQ43 min
Apr 19, 8:26 AM EDTFlash Flood WatchAKQ20 hr
Apr 19, 12:29 PM EDTMesoscale DiscussionSPC2 hr
Apr 19, 1:12 PM EDTSevere Thunderstorm WarningAKQ48 min
Apr 19, 1:17 PM EDTTornado WatchSPC11 hr
Apr 19, 1:35 PM EDTSevere Thunderstorm WarningAKQ40 min
Apr 19, 3:18 PM EDTMesoscale DiscussionSPC87 min
Apr 19, 6:21 PM EDTMesoscale DiscussionSPC84 min
Apr 19, 8:03 PM EDTTornado WarningAKQ27 min
Apr 25, 2:38 AM EDTSpecial Weather StatementAKQ22 min
Apr 26, 10:41 AM EDTSpecial Weather StatementAKQ49 min
Apr 26, 11:37 AM EDTMesoscale DiscussionSPC113 min
Apr 26, 2:01 PM EDTSevere Thunderstorm WatchSPC5 hr
Apr 26, 3:09 PM EDTSpecial Weather StatementAKQ51 min
Apr 26, 3:12 PM EDTSpecial Weather StatementAKQ48 min
Apr 26, 3:24 PM EDTSevere Thunderstorm WarningAKQ33 min
May 23, 3:05 PM EDTSevere Thunderstorm WatchSPC4 hr
May 23, 3:42 PM EDTMesoscale DiscussionSPC93 min
May 26, 11:14 AM EDTMesoscale DiscussionSPC3 hr
May 26, 1:45 PM EDTMesoscale DiscussionSPC2 hr
May 26, 4:29 PM EDTSpecial Weather StatementAKQ31 min
May 26, 4:35 PM EDTSevere Thunderstorm WarningAKQ40 min
May 26, 5:45 PM EDTMesoscale DiscussionSPC2 hr
May 29, 6:22 PM EDTMesoscale DiscussionSPC83 min
Jun 1, 2:18 PM EDTSpecial Weather StatementAKQ42 min
Jun 2, 3:33 PM EDTMesoscale DiscussionSPC87 min
Jun 2, 5:57 PM EDTMesoscale DiscussionSPC93 min
Jun 2, 10:28 PM EDTSpecial Weather StatementAKQ32 min
Jun 5, 12:52 PM EDTMesoscale DiscussionSPC113 min
Jun 5, 2:33 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 5, 3:28 PM EDTSpecial Weather StatementAKQ47 min
Jun 5, 3:48 PM EDTSevere Thunderstorm WarningAKQ42 min
Jun 5, 4:35 PM EDTSevere Thunderstorm WarningAKQ40 min
Jun 5, 5:33 PM EDTMesoscale DiscussionSPC57 min
Jun 10, 3:07 PM EDTAreal Flood AdvisoryAKQ3 hr
Jun 18, 12:23 PM EDTMesoscale DiscussionSPC97 min
Jun 18, 5:47 PM EDTSevere Thunderstorm WarningAKQ32 min
Jun 20, 12:23 PM EDTMesoscale DiscussionSPC2 hr
Jun 20, 1:49 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 20, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 24, 7:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 28, 5:59 PM EDTMesoscale DiscussionSPC2 hr
Jul 4, 4:53 PM EDTSpecial Weather StatementAKQ52 min
Jul 6, 1:48 PM EDTMesoscale DiscussionSPC2 hr
Jul 7, 6:37 PM EDTAreal Flood AdvisoryAKQ113 min
Jul 7, 7:48 PM EDTAreal Flood AdvisoryAKQ117 min
Jul 11, 12:51 PM EDTMesoscale DiscussionSPC84 min
Jul 11, 5:59 PM EDTMesoscale DiscussionSPC2 hr
Jul 16, 2:46 PM EDTHeat AdvisoryAKQ52 hr
Jul 16, 3:28 PM EDTMesoscale DiscussionSPC3 hr
Jul 17, 1:29 PM EDTMesoscale DiscussionSPC3 hr
Jul 18, 1:49 PM EDTMesoscale DiscussionSPC2 hr
Jul 18, 3:25 PM EDTExcessive Heat WarningAKQ3 days
Jul 18, 3:25 PM EDTHeat AdvisoryAKQ29 hr
Jul 18, 6:46 PM EDTSpecial Weather StatementAKQ44 min
Jul 19, 3:15 AM EDTExcessive Heat WatchAKQ12 hr
Jul 21, 3:08 PM EDTHeat AdvisoryAKQ28 hr
Jul 22, 2:17 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 31, 5:41 PM EDTSpecial Weather StatementAKQ64 min
Jul 31, 5:52 PM EDTSpecial Weather StatementAKQ38 min
Aug 2, 6:36 AM EDTSpecial Weather StatementAKQ54 min
Aug 5, 4:07 PM EDTSpecial Weather StatementAKQ38 min
Aug 7, 12:50 PM EDTMesoscale DiscussionSPC85 min
Aug 7, 1:53 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 7, 2:28 PM EDTSevere Thunderstorm WarningAKQ47 min
Aug 7, 3:17 PM EDTSevere Thunderstorm WarningAKQ21 min
Aug 7, 3:25 PM EDTMesoscale DiscussionSPC65 min
Aug 7, 3:43 PM EDTSpecial Weather StatementAKQ47 min
Aug 7, 4:32 PM EDTSpecial Weather StatementAKQ43 min
Aug 8, 12:20 AM EDTSpecial Weather StatementAKQ40 min
Aug 9, 2:25 PM EDTMesoscale DiscussionSPC95 min
Aug 9, 3:05 PM EDTSpecial Weather StatementAKQ40 min
Aug 13, 9:14 PM EDTSevere Thunderstorm WarningAKQ46 min
Aug 13, 9:59 PM EDTSpecial Weather StatementAKQ46 min
Aug 15, 4:02 PM EDTSpecial Weather StatementAKQ43 min
Aug 20, 4:15 PM EDTSpecial Weather StatementAKQ45 min
Aug 20, 7:00 PM EDTMesoscale DiscussionSPC2 hr
Aug 20, 8:55 PM EDTSpecial Weather StatementAKQ65 min
Aug 20, 9:22 PM EDTSpecial Weather StatementAKQ53 min
Aug 20, 10:20 PM EDTAreal Flood AdvisoryAKQ3 hr
Aug 21, 8:04 PM EDTSevere Thunderstorm WarningAKQ41 min
Aug 21, 8:44 PM EDTSpecial Weather StatementAKQ61 min
Aug 22, 4:53 PM EDTSevere Thunderstorm WarningAKQ52 min
Aug 22, 5:49 PM EDTSevere Thunderstorm WarningAKQ56 min
Aug 22, 6:11 PM EDTSevere Thunderstorm WarningAKQ38 min
Aug 22, 6:42 PM EDTSevere Thunderstorm WarningAKQ48 min
Aug 23, 2:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 23, 3:24 PM EDTSevere Thunderstorm WatchSPC7 hr
Sep 3, 5:17 PM EDTTropical Storm WatchAKQ42 hr
Sep 4, 5:39 PM EDTTropical Storm WarningAKQ51 hr
Sep 11, 7:59 PM EDTSpecial Weather StatementAKQ31 min
Sep 12, 2:02 PM EDTMesoscale DiscussionSPC118 min
Oct 16, 1:35 PM EDTSpecial Weather StatementAKQ55 min
Oct 20, 10:31 AM EDTSpecial Weather StatementAKQ44 min
Oct 23, 1:06 AM EDTDense Fog AdvisoryAKQ4 hr
Oct 31, 3:16 PM EDTTornado WatchSPC8 hr
Oct 31, 6:36 PM EDTMesoscale DiscussionSPC114 min
Oct 31, 11:17 PM EDTSpecial Weather StatementAKQ58 min
Nov 1, 4:00 AM EDTFrost AdvisoryAKQ29 hr
Nov 3, 2:00 PM ESTFreeze WarningAKQ19 hr
Dec 26, 5:23 AM ESTDense Fog AdvisoryAKQ4 hr
Dec 26, 9:06 AM ESTDense Fog AdvisoryAKQ114 min
Dec 27, 12:39 AM ESTDense Fog AdvisoryAKQ10 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 archive20182020

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.