Alert archive / Virginia / Spotsylvania County

Weather alerts in Spotsylvania County, Virginia, 2018

128 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Spotsylvania County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
128
Warnings
40
Watches
27
Advisories
26
Busiest month
June23 alerts
Busiest day
July 27, 20186 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 3 tornado warnings covering Spotsylvania County in 2018 had a tornado report inside them.

Spotsylvania County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings30100%0
Severe thunderstorm warnings131115%1164%23 min
Flash flood warnings2150%0

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings19195%425%1 min
NWS Baltimore/Washington: severe thunderstorm warnings31220833%69070%20 min
NWS Baltimore/Washington: flash flood warnings873856%12989%103 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 3, 3:34 AM ESTWinter Weather AdvisoryLWX35 hr
Jan 4, 3:36 AM ESTWind Chill AdvisoryLWX32 hr
Jan 5, 3:45 AM ESTWind Chill AdvisoryLWX54 hr
Jan 9, 4:32 AM ESTDense Fog AdvisoryLWX4 hr
Jan 15, 1:47 PM ESTWinter Weather AdvisoryLWX46 hr
Feb 3, 3:00 PM ESTWinter Weather AdvisoryLWX28 hr
Feb 6, 4:02 AM ESTWinter Weather AdvisoryLWX38 hr
Feb 10, 3:38 AM ESTFlood WatchLWX36 hr
Feb 11, 7:53 AM ESTAreal Flood WarningLWX12 hr
Feb 25, 5:46 AM ESTDense Fog AdvisoryLWX5 hr
Feb 28, 2:52 PM ESTHigh Wind WatchLWX21 hr
Mar 1, 4:06 AM ESTHigh Wind WarningLWX45 hr
Mar 1, 10:37 PM ESTSpecial Weather StatementLWX7 hr
Mar 2, 7:57 PM ESTWind AdvisoryLWX10 hr
Mar 20, 10:00 AM EDTSpecial Weather StatementLWX15 min
Mar 20, 12:47 PM EDTWinter Storm WarningLWX31 hr
Mar 20, 12:47 PM EDTWinter Weather AdvisoryLWX5 hr
Apr 11, 1:34 PM EDTFire Weather WatchLWX14 hr
Apr 12, 3:42 AM EDTRed Flag WarningLWX16 hr
Apr 15, 8:33 PM EDTSevere Thunderstorm WarningLWX42 min
Apr 17, 1:24 PM EDTFreeze WarningLWX19 hr
Apr 19, 4:27 AM EDTFreeze WatchLWX10 hr
Apr 19, 2:22 PM EDTFreeze WarningLWX18 hr
Apr 28, 5:21 AM EDTDense Fog AdvisoryLWX5 hr
Apr 29, 3:15 PM EDTFrost AdvisoryLWX17 hr
May 10, 12:36 PM EDTMesoscale DiscussionSPC114 min
May 10, 1:14 PM EDTSevere Thunderstorm WatchSPC8 hr
May 10, 4:53 PM EDTMesoscale DiscussionSPC67 min
May 10, 6:24 PM EDTSevere Thunderstorm WarningLWX53 min
May 13, 4:28 PM EDTSevere Thunderstorm WatchSPC7 hr
May 13, 7:00 PM EDTMesoscale DiscussionSPC60 min
May 14, 12:29 PM EDTSevere Thunderstorm WatchSPC9 hr
May 14, 3:26 PM EDTMesoscale DiscussionSPC2 hr
May 14, 6:11 PM EDTSevere Thunderstorm WarningLWX79 min
May 14, 7:22 PM EDTMesoscale DiscussionSPC53 min
May 15, 5:43 PM EDTMesoscale DiscussionSPC92 min
May 16, 1:40 PM EDTFlood WatchLWX3 days
May 19, 1:37 AM EDTAreal Flood WarningLWX15 hr
May 22, 1:52 PM EDTMesoscale DiscussionSPC113 min
May 22, 2:33 PM EDTSevere Thunderstorm WatchSPC6 hr
May 22, 4:50 PM EDTMesoscale DiscussionSPC115 min
May 27, 1:29 PM EDTMesoscale DiscussionSPC3 hr
May 28, 3:47 PM EDTSpecial Weather StatementAKQ43 min
May 31, 7:38 AM EDTRiver Flood WarningLWX26 hr
Jun 2, 3:13 AM EDTFlash Flood WatchLWX25 hr
Jun 3, 4:11 AM EDTFlood WatchLWX14 hr
Jun 3, 11:54 AM EDTRiver Flood WarningLWX23 hr
Jun 3, 12:00 PM EDTAreal Flood WarningLWX15 hr
Jun 3, 3:59 PM EDTRiver Flood WarningLWX11 hr
Jun 9, 1:34 PM EDTMesoscale DiscussionSPC2 hr
Jun 9, 9:59 PM EDTAreal Flood WarningLWX3 hr
Jun 10, 3:47 AM EDTFlash Flood WatchLWX24 hr
Jun 10, 3:23 PM EDTMesoscale DiscussionSPC2 hr
Jun 18, 9:42 AM EDTHeat AdvisoryLWX10 hr
Jun 20, 2:19 PM EDTMesoscale DiscussionSPC116 min
Jun 20, 3:26 PM EDTSevere Thunderstorm WarningLWX34 min
Jun 21, 4:11 AM EDTFlash Flood WatchLWX29 hr
Jun 22, 5:47 AM EDTAreal Flood WarningLWX28 hr
Jun 22, 6:58 AM EDTRiver Flood WarningLWX33 hr
Jun 22, 8:29 AM EDTRiver Flood WarningLWX44 hr
Jun 22, 11:30 AM EDTFlash Flood WatchLWX14 hr
Jun 23, 5:29 AM EDTAreal Flood WarningLWX5 hr
Jun 23, 5:40 PM EDTMesoscale DiscussionSPC2 hr
Jun 24, 2:04 PM EDTMesoscale DiscussionSPC116 min
Jun 24, 4:07 PM EDTSevere Thunderstorm WarningLWX21 min
Jun 27, 7:37 PM EDTMesoscale DiscussionSPC3 hr
Jun 30, 2:14 PM EDTHeat AdvisoryLWX27 hr
Jul 1, 2:10 PM EDTHeat AdvisoryLWX30 hr
Jul 2, 1:40 PM EDTHeat AdvisoryLWX30 hr
Jul 11, 2:15 PM EDTMesoscale DiscussionSPC3 hr
Jul 16, 5:25 PM EDTSevere Thunderstorm WarningLWX35 min
Jul 21, 2:48 PM EDTAreal Flood WarningLWX6 hr
Jul 22, 11:35 AM EDTFlash Flood WatchLWX17 hr
Jul 23, 2:57 AM EDTMesoscale DiscussionSPC3 hr
Jul 23, 4:59 AM EDTFlash Flood WatchLWX68 hr
Jul 23, 2:40 PM EDTMesoscale DiscussionSPC3 hr
Jul 25, 7:42 PM EDTAreal Flood WarningLWX6 hr
Jul 27, 1:24 PM EDTSevere Thunderstorm WarningLWX41 min
Jul 27, 1:28 PM EDTMesoscale DiscussionSPC62 min
Jul 27, 1:52 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 27, 4:50 PM EDTMesoscale DiscussionSPC55 min
Jul 27, 7:05 PM EDTSevere Thunderstorm WarningLWX40 min
Jul 27, 7:06 PM EDTMesoscale DiscussionSPC54 min
Jul 31, 11:14 PM EDTFlash Flood WatchLWX72 hr
Aug 2, 11:46 AM EDTMesoscale DiscussionSPC119 min
Aug 2, 12:36 PM EDTTornado WarningLWX24 min
Aug 2, 12:56 PM EDTTornado WarningLWX13 min
Aug 4, 2:11 AM EDTRiver Flood WarningLWX11 hr
Aug 12, 12:23 PM EDTFlash Flood WatchLWX9 hr
Aug 12, 2:18 PM EDTMesoscale DiscussionSPC2 hr
Aug 12, 3:03 PM EDTSevere Thunderstorm WarningLWX72 min
Aug 12, 3:05 PM EDTSevere Thunderstorm WarningLWX40 min
Aug 12, 3:45 PM EDTSevere Thunderstorm WarningLWX45 min
Aug 12, 4:14 PM EDTSevere Thunderstorm WarningLWX46 min
Aug 13, 1:57 PM EDTMesoscale DiscussionSPC3 hr
Aug 17, 3:10 PM EDTMesoscale DiscussionSPC3 hr
Aug 21, 5:03 PM EDTMesoscale DiscussionSPC117 min
Aug 28, 3:52 AM EDTHeat AdvisoryLWX16 hr
Aug 29, 3:49 AM EDTHeat AdvisoryLWX16 hr
Sep 4, 2:17 AM EDTHeat AdvisoryLWX17 hr
Sep 16, 3:11 PM EDTFlash Flood WatchLWX52 hr
Sep 17, 3:11 PM EDTTornado WarningLWX34 min
Sep 17, 3:42 PM EDTTornado WatchSPC4 hr
Sep 17, 7:09 PM EDTMesoscale DiscussionSPC2 hr
Sep 20, 4:09 AM EDTDense Fog AdvisoryLWX5 hr
Sep 26, 3:40 PM EDTMesoscale DiscussionSPC3 hr
Sep 26, 5:02 PM EDTSevere Thunderstorm WatchSPC4 hr
Oct 8, 2:58 AM EDTDense Fog AdvisoryLWX7 hr
Oct 10, 3:42 PM EDTFlash Flood WatchLWX31 hr
Oct 11, 12:48 PM EDTMesoscale DiscussionSPC117 min
Oct 11, 3:39 PM EDTSevere Thunderstorm WarningLWX34 min
Oct 11, 4:35 PM EDTFlash Flood WarningLWX5 hr
Oct 11, 6:23 PM EDTFlash Flood WarningLWX3 hr
Oct 11, 9:14 PM EDTAreal Flood WarningLWX5 hr
Oct 18, 2:57 PM EDTFrost AdvisoryLWX18 hr
Oct 21, 4:05 AM EDTFrost AdvisoryLWX30 hr
Oct 21, 4:05 AM EDTFreeze WarningLWX30 hr
Nov 2, 6:55 PM EDTMesoscale DiscussionSPC95 min
Nov 14, 3:54 PM ESTWinter Weather AdvisoryLWX36 hr
Nov 15, 12:28 AM ESTFlood WatchLWX14 hr
Dec 8, 6:02 PM ESTWinter Storm WarningLWX30 hr
Dec 8, 6:02 PM ESTWinter Weather AdvisoryLWX30 hr
Dec 9, 12:34 PM ESTMesoscale DiscussionSPC5 hr
Dec 13, 2:04 PM ESTFlood WatchLWX63 hr
Dec 19, 3:48 AM ESTFlood WatchLWX59 hr
Dec 21, 2:33 PM ESTMesoscale DiscussionSPC57 min
Dec 27, 3:41 AM ESTFlood WatchLWX39 hr
Dec 28, 7:45 PM ESTDense Fog AdvisoryLWX11 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 archive20172019

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.