Alert archive / Virginia / Spotsylvania County

Weather alerts in Spotsylvania County, Virginia, 2017

77 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts
77
Warnings
23
Watches
14
Advisories
16
Busiest month
July19 alerts
Busiest day
February 25, 20175 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 2 tornado warnings covering Spotsylvania County in 2017 had a tornado report inside them.

Spotsylvania County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings181422%1283%17 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings11464%1833%7 min
NWS Baltimore/Washington: severe thunderstorm warnings26119426%97681%19 min
NWS Baltimore/Washington: flash flood warnings493431%13081%78 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 6, 8:48 AM ESTWinter Weather AdvisoryLWX30 hr
Jan 29, 3:42 AM ESTWinter Weather AdvisoryLWX33 hr
Feb 25, 12:24 PM ESTMesoscale DiscussionSPC2 hr
Feb 25, 1:30 PM ESTSevere Thunderstorm WatchSPC6 hr
Feb 25, 1:33 PM ESTSevere Thunderstorm WarningLWX42 min
Feb 25, 2:02 PM ESTSevere Thunderstorm WarningLWX43 min
Feb 25, 2:27 PM ESTSevere Thunderstorm WarningLWX48 min
Mar 1, 9:44 AM ESTMesoscale DiscussionSPC91 min
Mar 1, 10:38 AM ESTSevere Thunderstorm WatchSPC4 hr
Mar 1, 1:05 PM ESTSevere Thunderstorm WarningLWX40 min
Mar 1, 1:36 PM ESTSevere Thunderstorm WarningLWX54 min
Mar 13, 4:00 AM EDTWinter Weather AdvisoryLWX34 hr
Mar 21, 10:00 AM EDTSpecial Weather StatementLWX15 min
Mar 27, 4:37 AM EDTDense Fog AdvisoryLWX5 hr
Apr 6, 5:59 AM EDTMesoscale DiscussionSPC91 min
Apr 6, 12:17 PM EDTSevere Thunderstorm WarningLWX29 min
Apr 6, 12:18 PM EDTMesoscale DiscussionSPC57 min
Apr 6, 12:43 PM EDTSevere Thunderstorm WarningLWX47 min
Apr 6, 12:45 PM EDTSevere Thunderstorm WatchSPC4 hr
Apr 8, 2:10 PM EDTFrost AdvisoryLWX18 hr
Apr 21, 4:19 PM EDTMesoscale DiscussionSPC56 min
Apr 30, 3:25 PM EDTMesoscale DiscussionSPC95 min
May 1, 5:54 PM EDTSevere Thunderstorm WatchSPC5 hr
May 1, 8:28 PM EDTMesoscale DiscussionSPC92 min
May 5, 6:14 AM EDTSevere Thunderstorm WarningLWX31 min
May 5, 7:49 AM EDTSevere Thunderstorm WarningLWX56 min
May 5, 6:15 PM EDTMesoscale DiscussionSPC90 min
May 19, 3:25 PM EDTSevere Thunderstorm WarningLWX50 min
May 19, 4:49 PM EDTSevere Thunderstorm WarningLWX30 min
May 19, 5:34 PM EDTSevere Thunderstorm WarningLWX41 min
May 25, 12:59 PM EDTMesoscale DiscussionSPC61 min
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 30, 5:56 PM EDTMesoscale DiscussionSPC64 min
May 30, 7:07 PM EDTSevere Thunderstorm WarningLWX53 min
May 31, 1:58 PM EDTMesoscale DiscussionSPC3 hr
Jun 14, 1:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 19, 4:09 AM EDTFlash Flood WatchLWX14 hr
Jun 19, 12:14 PM EDTMesoscale DiscussionSPC2 hr
Jun 19, 12:48 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 19, 2:21 PM EDTMesoscale DiscussionSPC114 min
Jul 6, 6:20 AM EDTFlash Flood WatchLWX20 hr
Jul 6, 6:40 PM EDTTornado WarningLWX8 min
Jul 6, 6:47 PM EDTSevere Thunderstorm WarningLWX43 min
Jul 6, 7:14 PM EDTSevere Thunderstorm WarningLWX33 min
Jul 12, 3:05 PM EDTHeat AdvisoryLWX28 hr
Jul 13, 3:03 PM EDTMesoscale DiscussionSPC57 min
Jul 14, 12:12 PM EDTHeat AdvisoryLWX6 hr
Jul 14, 1:09 PM EDTMesoscale DiscussionSPC2 hr
Jul 14, 1:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 4:23 PM EDTMesoscale DiscussionSPC67 min
Jul 20, 3:21 AM EDTHeat AdvisoryLWX16 hr
Jul 20, 8:30 PM EDTHeat AdvisoryLWX23 hr
Jul 22, 3:09 AM EDTHeat AdvisoryLWX16 hr
Jul 22, 6:09 PM EDTSevere Thunderstorm WarningLWX51 min
Jul 22, 6:16 PM EDTTornado WarningLWX29 min
Jul 22, 7:11 PM EDTMesoscale DiscussionSPC94 min
Jul 22, 10:32 PM EDTSevere Thunderstorm WarningLWX43 min
Jul 24, 6:09 PM EDTMesoscale DiscussionSPC3 hr
Jul 27, 1:47 PM EDTFlash Flood WatchLWX48 hr
Aug 2, 2:44 PM EDTSpecial Weather StatementAKQ46 min
Aug 6, 5:29 PM EDTFlash Flood WatchLWX23 hr
Aug 15, 11:47 AM EDTAreal Flood WarningLWX118 min
Aug 15, 10:31 PM EDTDense Fog AdvisoryLWX11 hr
Aug 18, 3:42 AM EDTHeat AdvisoryLWX15 hr
Aug 18, 12:35 PM EDTFlash Flood WatchLWX8 hr
Aug 18, 2:27 PM EDTSevere Thunderstorm WatchSPC9 hr
Aug 21, 2:53 PM EDTMesoscale DiscussionSPC2 hr
Aug 21, 6:18 PM EDTSevere Thunderstorm WarningLWX42 min
Oct 17, 1:39 PM EDTFrost AdvisoryLWX19 hr
Oct 23, 6:31 PM EDTWind AdvisoryLWX10 hr
Oct 26, 3:53 AM EDTFrost AdvisoryLWX29 hr
Nov 9, 2:17 AM ESTFreeze WatchLWX24 hr
Nov 10, 2:41 AM ESTFreeze WarningLWX31 hr
Dec 8, 5:50 AM ESTWinter Weather AdvisoryLWX51 hr
Dec 8, 2:52 PM ESTWinter Storm WarningLWX25 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.