Alert archive / Virginia / Orange County

Weather alerts in Orange County, Virginia, 2021

129 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Orange County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
129
Warnings
51
Watches
27
Advisories
20
Busiest month
August32 alerts
Busiest day
June 3, 20217 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 Orange County in 2021 had a tornado report inside them.

Orange County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings372630%2685%18 min
Flash flood warnings10100%0

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings491080%13100%11 min
NWS Baltimore/Washington: severe thunderstorm warnings54439627%1,44683%20 min
NWS Baltimore/Washington: flash flood warnings763258%9677%60 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 15, 10:46 PM ESTDense Fog AdvisoryLWX9 hr
Jan 26, 8:18 PM ESTDense Fog AdvisoryLWX13 hr
Jan 29, 3:10 PM ESTWinter Storm WatchLWX23 hr
Jan 30, 9:02 AM ESTWinter Storm WarningLWX69 hr
Jan 31, 5:12 AM ESTMesoscale DiscussionSPC6 hr
Jan 31, 6:50 PM ESTWinter Weather AdvisoryLWX42 hr
Feb 5, 3:13 PM ESTWinter Storm WatchLWX12 hr
Feb 6, 3:22 AM ESTWinter Storm WarningLWX33 hr
Feb 7, 4:24 AM ESTMesoscale DiscussionSPC6 hr
Feb 10, 3:33 AM ESTWinter Storm WatchLWX24 hr
Feb 11, 3:28 AM ESTWinter Weather AdvisoryLWX30 hr
Feb 11, 6:08 PM ESTWinter Storm WatchLWX21 hr
Feb 12, 3:10 PM ESTIce Storm WarningLWX30 hr
Feb 12, 3:10 PM ESTWinter Weather AdvisoryLWX43 hr
Feb 13, 10:02 AM ESTMesoscale DiscussionSPC6 hr
Feb 16, 4:56 AM ESTWinter Storm WatchLWX29 hr
Feb 17, 3:24 AM ESTWinter Storm WarningLWX57 hr
Feb 18, 4:28 AM ESTMesoscale DiscussionSPC6 hr
Feb 18, 10:23 AM ESTMesoscale DiscussionSPC3 hr
Feb 21, 3:17 PM ESTWinter Weather AdvisoryLWX24 hr
Feb 28, 9:09 PM ESTDense Fog AdvisoryLWX8 hr
Mar 10, 3:43 PM ESTFire Weather WatchLWX12 hr
Mar 11, 3:28 AM ESTRed Flag WarningLWX15 hr
Mar 24, 9:09 PM EDTDense Fog AdvisoryLWX14 hr
Mar 25, 2:41 PM EDTWind AdvisoryLWX27 hr
Mar 28, 1:24 PM EDTMesoscale DiscussionSPC2 hr
Apr 10, 4:55 AM EDTDense Fog AdvisoryLWX4 hr
Apr 11, 4:54 PM EDTMesoscale DiscussionSPC2 hr
Apr 16, 11:59 AM EDTFrost AdvisoryLWX21 hr
Apr 22, 12:03 PM EDTFreeze WarningLWX20 hr
Apr 24, 2:37 AM EDTFrost AdvisoryLWX5 hr
Apr 30, 12:24 PM EDTRed Flag WarningLWX7 hr
May 4, 1:04 PM EDTMesoscale DiscussionSPC56 min
May 4, 1:51 PM EDTSevere Thunderstorm WatchSPC6 hr
May 4, 3:50 PM EDTMesoscale DiscussionSPC115 min
May 4, 4:41 PM EDTSevere Thunderstorm WarningLWX37 min
May 5, 1:03 PM EDTMesoscale DiscussionSPC2 hr
May 17, 2:51 AM EDTDense Fog AdvisoryLWX7 hr
May 26, 1:21 PM EDTMesoscale DiscussionSPC84 min
May 26, 2:48 PM EDTSevere Thunderstorm WatchSPC7 hr
May 28, 3:56 PM EDTMesoscale DiscussionSPC2 hr
Jun 3, 1:46 PM EDTMesoscale DiscussionSPC119 min
Jun 3, 2:48 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 3, 3:56 PM EDTSevere Thunderstorm WarningLWX49 min
Jun 3, 4:45 PM EDTSevere Thunderstorm WarningLWX45 min
Jun 3, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 3, 5:19 PM EDTSevere Thunderstorm WarningLWX41 min
Jun 3, 5:32 PM EDTSevere Thunderstorm WarningLWX43 min
Jun 4, 12:39 PM EDTSevere Thunderstorm WarningLWX51 min
Jun 4, 12:46 PM EDTMesoscale DiscussionSPC59 min
Jun 4, 12:59 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 4, 1:10 PM EDTSevere Thunderstorm WarningLWX36 min
Jun 10, 2:53 AM EDTFlash Flood WatchLWX43 hr
Jun 10, 7:18 PM EDTSevere Thunderstorm WarningLWX42 min
Jun 11, 8:59 AM EDTAreal Flood WarningLWX7 hr
Jun 11, 2:15 PM EDTRiver Flood WarningLWX3 hr
Jun 14, 6:41 PM EDTMesoscale DiscussionSPC2 hr
Jun 21, 1:51 PM EDTMesoscale DiscussionSPC114 min
Jun 30, 2:23 PM EDTFlash Flood WatchLWX42 hr
Jul 1, 11:45 AM EDTMesoscale DiscussionSPC2 hr
Jul 1, 12:46 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 3:04 PM EDTSevere Thunderstorm WarningLWX41 min
Jul 14, 3:24 PM EDTMesoscale DiscussionSPC2 hr
Jul 14, 3:37 PM EDTSevere Thunderstorm WarningLWX38 min
Jul 14, 4:06 PM EDTSevere Thunderstorm WarningLWX39 min
Jul 14, 4:20 PM EDTSevere Thunderstorm WarningLWX40 min
Jul 14, 5:12 PM EDTSevere Thunderstorm WarningLWX48 min
Jul 15, 6:09 PM EDTSevere Thunderstorm WarningLWX51 min
Jul 17, 12:45 PM EDTSevere Thunderstorm WarningLWX45 min
Jul 17, 1:13 PM EDTSevere Thunderstorm WatchSPC10 hr
Jul 17, 1:42 PM EDTSevere Thunderstorm WarningLWX48 min
Jul 17, 2:19 PM EDTSevere Thunderstorm WarningLWX41 min
Jul 17, 3:09 PM EDTSevere Thunderstorm WarningLWX23 min
Jul 17, 4:38 PM EDTMesoscale DiscussionSPC97 min
Jul 17, 6:54 PM EDTMesoscale DiscussionSPC2 hr
Jul 29, 3:00 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 8, 4:38 AM EDTDense Fog AdvisoryLWX4 hr
Aug 10, 2:30 PM EDTMesoscale DiscussionSPC3 hr
Aug 10, 3:24 PM EDTSevere Thunderstorm WarningLWX34 min
Aug 11, 1:01 PM EDTMesoscale DiscussionSPC89 min
Aug 11, 2:02 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 11, 3:47 PM EDTMesoscale DiscussionSPC88 min
Aug 11, 3:50 PM EDTSevere Thunderstorm WarningLWX29 min
Aug 12, 2:15 AM EDTHeat AdvisoryLWX18 hr
Aug 12, 6:04 PM EDTHeat AdvisoryLWX25 hr
Aug 13, 12:33 PM EDTMesoscale DiscussionSPC87 min
Aug 13, 1:11 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 13, 3:05 PM EDTSevere Thunderstorm Warning Considerable damage threatLWX25 min
Aug 13, 3:30 PM EDTSevere Thunderstorm WarningLWX45 min
Aug 13, 3:35 PM EDTFlash Flood Warning Considerable damage threatLWX3 hr
Aug 13, 3:53 PM EDTSevere Thunderstorm WarningLWX52 min
Aug 14, 1:10 PM EDTMesoscale DiscussionSPC2 hr
Aug 14, 4:03 PM EDTSevere Thunderstorm WarningLWX42 min
Aug 14, 6:14 PM EDTFlash Flood WatchLWX10 hr
Aug 17, 1:54 PM EDTFlash Flood WatchLWX27 hr
Aug 19, 2:11 PM EDTFlash Flood WatchLWX28 hr
Aug 27, 1:41 PM EDTMesoscale DiscussionSPC3 hr
Aug 28, 1:05 PM EDTMesoscale DiscussionSPC115 min
Aug 28, 7:37 PM EDTSevere Thunderstorm Warning Considerable damage threatLWX53 min
Aug 28, 8:03 PM EDTSevere Thunderstorm WarningLWX42 min
Aug 28, 8:27 PM EDTSevere Thunderstorm WarningLWX32 min
Aug 28, 8:38 PM EDTSevere Thunderstorm WarningLWX52 min
Aug 28, 8:44 PM EDTSevere Thunderstorm WarningLWX46 min
Aug 28, 9:07 PM EDTAreal Flood WarningLWX3 hr
Aug 30, 4:54 AM EDTFlash Flood WatchLWX62 hr
Aug 30, 11:48 AM EDTFlash Flood WatchLWX6 hr
Aug 30, 4:51 PM EDTMesoscale DiscussionSPC84 min
Aug 31, 7:36 PM EDTTornado WatchSPC7 hr
Aug 31, 11:01 PM EDTMesoscale DiscussionSPC89 min
Sep 1, 12:18 AM EDTSevere Thunderstorm WarningLWX42 min
Sep 1, 12:25 AM EDTTornado WarningLWX35 min
Sep 1, 12:53 AM EDTSevere Thunderstorm WarningLWX52 min
Sep 1, 1:09 AM EDTSevere Thunderstorm WarningLWX51 min
Sep 1, 11:46 AM EDTTornado WatchSPC9 hr
Sep 28, 4:16 PM EDTMesoscale DiscussionSPC119 min
Sep 28, 5:27 PM EDTSevere Thunderstorm WarningLWX48 min
Sep 28, 5:32 PM EDTSevere Thunderstorm WarningLWX43 min
Sep 28, 5:40 PM EDTSevere Thunderstorm WarningLWX50 min
Oct 5, 12:37 AM EDTDense Fog AdvisoryLWX9 hr
Oct 5, 11:59 AM EDTFlood WatchLWX14 hr
Oct 13, 3:53 AM EDTDense Fog AdvisoryLWX7 hr
Oct 14, 2:36 AM EDTDense Fog AdvisoryLWX7 hr
Oct 25, 6:11 PM EDTSevere Thunderstorm WarningLWX34 min
Oct 25, 6:26 PM EDTSevere Thunderstorm WatchSPC4 hr
Oct 25, 7:23 PM EDTSevere Thunderstorm WarningLWX21 min
Oct 29, 4:03 PM EDTAreal Flood WarningLWX5 hr
Oct 31, 4:26 AM EDTDense Fog AdvisoryLWX3 hr
Nov 1, 3:03 AM EDTFreeze WatchLWX24 hr
Nov 2, 3:22 AM EDTFreeze WarningLWX30 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 archive20202022

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.