Alert archive / Virginia / Highland County

Weather alerts in Highland County, Virginia, 2020

93 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Highland County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
93
Warnings
19
Watches
27
Advisories
26
Busiest month
April16 alerts
Busiest day
April 9, 20206 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Highland County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8188%2100%13 min
Flash flood warnings00

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings27678%1547%9 min
NWS Baltimore/Washington: severe thunderstorm warnings45631431%1,04779%23 min
NWS Baltimore/Washington: flash flood warnings663448%13090%72 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 4, 2:11 PM ESTWinter Weather AdvisoryLWX16 hr
Jan 6, 1:49 PM ESTWinter Weather AdvisoryLWX29 hr
Jan 7, 8:49 AM ESTMesoscale DiscussionSPC4 hr
Jan 8, 3:40 AM ESTWind AdvisoryLWX13 hr
Jan 11, 3:38 AM ESTHigh Wind WatchLWX10 hr
Jan 11, 1:13 PM ESTWind AdvisoryLWX20 hr
Jan 15, 2:50 PM ESTWind AdvisoryLWX22 hr
Jan 17, 1:33 PM ESTWinter Weather AdvisoryLWX29 hr
Feb 2, 7:04 PM ESTWind AdvisoryLWX7 hr
Feb 26, 3:15 AM ESTWind AdvisoryLWX31 hr
Feb 26, 2:49 PM ESTMesoscale DiscussionSPC116 min
Mar 3, 4:27 PM ESTMesoscale DiscussionSPC2 hr
Mar 5, 2:28 PM ESTWinter Weather AdvisoryLWX32 hr
Mar 29, 3:32 AM EDTDense Fog AdvisoryLWX7 hr
Apr 7, 2:57 PM EDTMesoscale DiscussionSPC93 min
Apr 7, 8:43 PM EDTSevere Thunderstorm WarningLWX62 min
Apr 8, 5:03 AM EDTSevere Thunderstorm WarningLWX42 min
Apr 8, 5:30 AM EDTMesoscale DiscussionSPC30 min
Apr 8, 8:13 PM EDTWind AdvisoryLWX23 hr
Apr 9, 12:50 AM EDTMesoscale DiscussionSPC115 min
Apr 9, 2:03 AM EDTSevere Thunderstorm WatchSPC3 hr
Apr 9, 2:42 AM EDTSevere Thunderstorm WarningLWX63 min
Apr 9, 3:36 AM EDTMesoscale DiscussionSPC84 min
Apr 9, 7:38 PM EDTWind AdvisoryLWX22 hr
Apr 12, 4:47 AM EDTHigh Wind WatchLWX8 hr
Apr 12, 12:35 PM EDTHigh Wind WarningLWX26 hr
Apr 12, 12:35 PM EDTWind AdvisoryLWX29 hr
Apr 13, 1:51 AM EDTFlash Flood WatchLWX5 hr
Apr 21, 4:04 AM EDTFreeze WarningLWX27 hr
Apr 29, 4:24 AM EDTFlood WatchLWX39 hr
May 3, 7:35 PM EDTFlash Flood WatchLWX5 hr
May 6, 4:30 AM EDTFreeze WarningLWX29 hr
May 7, 4:29 AM EDTFreeze WatchLWX10 hr
May 7, 2:16 PM EDTFreeze WarningLWX43 hr
May 8, 3:30 AM EDTFreeze WatchLWX24 hr
May 9, 3:36 AM EDTFreeze WarningLWX28 hr
May 10, 1:47 PM EDTFreeze WatchLWX14 hr
May 11, 3:43 AM EDTFreeze WarningLWX29 hr
May 12, 2:41 PM EDTFreeze WarningLWX18 hr
May 21, 3:48 AM EDTFlash Flood WatchLWX15 hr
May 23, 4:09 AM EDTDense Fog AdvisoryLWX4 hr
May 24, 1:44 PM EDTMesoscale DiscussionSPC2 hr
Jun 4, 2:29 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 4, 4:41 PM EDTMesoscale DiscussionSPC94 min
Jun 5, 3:40 AM EDTFlash Flood WatchLWX17 hr
Jun 6, 6:07 PM EDTMesoscale DiscussionSPC113 min
Jun 18, 9:41 AM EDTAreal Flood WarningLWX3 hr
Jun 19, 12:37 PM EDTFlash Flood WatchLWX7 hr
Jun 20, 10:45 AM EDTFlash Flood WatchLWX10 hr
Jul 5, 4:30 PM EDTSevere Thunderstorm WarningLWX45 min
Jul 5, 4:57 PM EDTSevere Thunderstorm WarningLWX35 min
Jul 10, 4:23 PM EDTSevere Thunderstorm WarningLWX39 min
Jul 10, 6:20 PM EDTSevere Thunderstorm WarningLWX25 min
Jul 21, 1:00 PM EDTMesoscale DiscussionSPC2 hr
Jul 22, 10:48 AM EDTMesoscale DiscussionSPC117 min
Jul 22, 12:01 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 30, 10:01 PM EDTFlash Flood WatchLWX20 hr
Aug 1, 7:05 PM EDTMesoscale DiscussionSPC115 min
Aug 7, 4:22 PM EDTSpecial Weather StatementRLX38 min
Aug 11, 3:19 PM EDTFlash Flood WatchLWX52 hr
Aug 11, 5:46 PM EDTSpecial Weather StatementRLX29 min
Aug 12, 5:49 PM EDTSevere Thunderstorm WarningLWX41 min
Aug 14, 9:58 PM EDTFlash Flood WatchLWX16 hr
Aug 21, 4:20 AM EDTFlash Flood WatchLWX24 hr
Aug 22, 12:09 PM EDTFlash Flood WatchLWX12 hr
Aug 25, 3:10 PM EDTMesoscale DiscussionSPC95 min
Aug 25, 3:34 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 25, 7:07 PM EDTMesoscale DiscussionSPC113 min
Aug 27, 2:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 28, 7:50 PM EDTMesoscale DiscussionSPC2 hr
Aug 30, 7:21 PM EDTFlood WatchLWX26 hr
Sep 3, 3:06 PM EDTMesoscale DiscussionSPC114 min
Sep 19, 1:37 PM EDTFrost AdvisoryLWX20 hr
Sep 20, 1:43 PM EDTFrost AdvisoryLWX19 hr
Sep 21, 1:31 PM EDTFrost AdvisoryLWX19 hr
Oct 2, 12:48 PM EDTFrost AdvisoryLWX20 hr
Oct 15, 4:44 PM EDTFreeze WatchLWX22 hr
Oct 16, 2:39 PM EDTFreeze WarningLWX19 hr
Oct 28, 3:05 PM EDTFlood WatchLWX25 hr
Oct 31, 6:59 PM EDTWind AdvisoryLWX44 hr
Nov 14, 2:06 PM ESTWind AdvisoryLWX41 hr
Nov 30, 7:50 PM ESTWinter Weather AdvisoryLWX32 hr
Dec 13, 3:52 AM ESTWinter Storm WatchLWX11 hr
Dec 13, 2:25 PM ESTWinter Storm WarningLWX23 hr
Dec 13, 2:25 PM ESTWinter Weather AdvisoryLWX23 hr
Dec 14, 4:43 AM ESTWinter Storm WatchLWX35 hr
Dec 15, 4:09 AM ESTWinter Storm WarningLWX46 hr
Dec 16, 8:38 AM ESTMesoscale DiscussionSPC6 hr
Dec 18, 5:27 AM ESTDense Fog AdvisoryLWX14 hr
Dec 21, 4:10 AM ESTWinter Weather AdvisoryLWX28 hr
Dec 23, 4:27 AM ESTFlash Flood WatchLWX47 hr
Dec 24, 3:37 AM ESTWinter Weather AdvisoryLWX30 hr
Dec 25, 2:45 AM ESTWind Chill AdvisoryLWX30 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 archive20192021

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.