Alert archive / Virginia / Highland County

Weather alerts in Highland County, Virginia, 2010

89 weather alerts in 2010, 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 2010. Tap one for its archive.

Alerts
89
Warnings
14
Watches
14
Advisories
20
Busiest month
December22 alerts
Busiest day
May 27, 20107 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, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings6517%3100%26 min
Flash flood warnings3167%0

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Baltimore/Washington: tornado warnings31294%450%17 min
NWS Baltimore/Washington: severe thunderstorm warnings25719823%76286%21 min
NWS Baltimore/Washington: flash flood warnings643545%13992%166 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 24, 10:58 PM ESTFlash Flood WarningLWX9 hr
Jan 25, 7:57 AM ESTAreal Flood WarningLWX6 hr
Feb 5, 7:06 AM ESTMesoscale DiscussionSPC6 hr
Feb 5, 11:45 AM ESTMesoscale DiscussionSPC4 hr
Mar 13, 5:34 AM ESTAreal Flood WarningLWX6 hr
Mar 22, 12:44 PM EDTMesoscale DiscussionSPC2 hr
Apr 25, 2:26 PM EDTMesoscale DiscussionSPC94 min
May 2, 4:45 PM EDTMesoscale DiscussionSPC60 min
May 3, 4:16 AM EDTSpecial Weather StatementLWX59 min
May 8, 4:52 AM EDTSpecial Weather StatementLWX23 min
May 8, 5:25 AM EDTSpecial Weather StatementLWX35 min
May 12, 2:20 PM EDTSevere Thunderstorm WatchSPC6 hr
May 12, 2:36 PM EDTSpecial Weather StatementLWX39 min
May 14, 11:56 AM EDTMesoscale DiscussionSPC2 hr
May 14, 2:29 PM EDTSevere Thunderstorm WatchSPC7 hr
May 14, 7:35 PM EDTSpecial Weather StatementLWX25 min
May 27, 2:38 PM EDTSpecial Weather StatementLWX37 min
May 27, 2:50 PM EDTSpecial Weather StatementLWX25 min
May 27, 3:12 PM EDTSpecial Weather StatementLWX33 min
May 27, 3:49 PM EDTSpecial Weather StatementLWX26 min
May 27, 3:55 PM EDTSevere Thunderstorm WarningLWX50 min
May 27, 4:10 PM EDTSevere Thunderstorm WarningLWX50 min
May 27, 4:14 PM EDTFlash Flood WarningLWX2 hr
May 28, 1:19 PM EDTSpecial Weather StatementLWX26 min
May 28, 1:57 PM EDTSpecial Weather StatementLWX18 min
May 28, 3:12 PM EDTSevere Thunderstorm WatchSPC5 hr
May 28, 4:22 PM EDTMesoscale DiscussionSPC53 min
May 31, 3:35 PM EDTSpecial Weather StatementLWX25 min
Jun 3, 1:32 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 5, 4:21 PM EDTMesoscale DiscussionSPC54 min
Jun 6, 12:40 PM EDTTornado WatchSPC6 hr
Jun 22, 11:35 AM EDTMesoscale DiscussionSPC25 min
Jun 24, 12:28 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 24, 2:34 PM EDTMesoscale DiscussionSPC116 min
Jun 24, 3:00 PM EDTSevere Thunderstorm WarningLWX45 min
Jun 28, 12:26 PM EDTMesoscale DiscussionSPC2 hr
Jul 8, 8:22 PM EDTSpecial Weather StatementLWX53 min
Jul 17, 10:48 AM EDTSpecial Weather StatementLWX27 min
Jul 18, 6:03 PM EDTSpecial Weather StatementLWX42 min
Jul 20, 1:29 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 25, 1:21 PM EDTMesoscale DiscussionSPC54 min
Jul 25, 1:46 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 25, 3:25 PM EDTMesoscale DiscussionSPC65 min
Aug 4, 5:30 PM EDTMesoscale DiscussionSPC30 min
Aug 4, 5:52 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 4, 6:14 PM EDTSevere Thunderstorm WarningLWX46 min
Aug 4, 6:52 PM EDTSevere Thunderstorm WarningLWX53 min
Aug 4, 7:48 PM EDTMesoscale DiscussionSPC87 min
Aug 5, 12:37 PM EDTMesoscale DiscussionSPC53 min
Aug 5, 1:19 PM EDTSevere Thunderstorm WatchSPC9 hr
Aug 5, 3:11 PM EDTSpecial Weather StatementLWX34 min
Aug 5, 3:20 PM EDTSevere Thunderstorm WarningLWX55 min
Aug 5, 3:56 PM EDTMesoscale DiscussionSPC64 min
Aug 16, 2:01 PM EDTMesoscale DiscussionSPC89 min
Sep 28, 2:02 AM EDTSpecial Weather StatementLWX28 min
Sep 28, 2:33 AM EDTSpecial Weather StatementLWX27 min
Oct 15, 5:34 PM EDTSpecial Weather StatementLWX56 min
Oct 26, 6:21 PM EDTMesoscale DiscussionSPC54 min
Oct 26, 7:19 PM EDTTornado WatchSPC12 hr
Oct 26, 11:05 PM EDTMesoscale DiscussionSPC55 min
Oct 27, 12:24 AM EDTMesoscale DiscussionSPC66 min
Nov 16, 2:19 PM ESTWind AdvisoryLWX25 hr
Nov 16, 7:38 PM ESTSpecial Weather StatementLWX82 min
Nov 24, 2:06 PM ESTWinter Weather AdvisoryLWX21 hr
Nov 26, 11:55 PM ESTWind AdvisoryLWX9 hr
Nov 29, 3:20 PM ESTFlash Flood WatchLWX44 hr
Nov 30, 3:12 AM ESTWind AdvisoryLWX32 hr
Dec 1, 2:05 AM ESTFlash Flood WarningLWX8 hr
Dec 4, 1:24 PM ESTWinter Storm WatchLWX14 hr
Dec 4, 8:19 PM ESTWinter Weather AdvisoryLWX7 hr
Dec 5, 3:05 AM ESTWinter Storm WarningLWX63 hr
Dec 5, 11:11 AM ESTWind AdvisoryLWX15 hr
Dec 6, 8:53 AM ESTWind AdvisoryLWX11 hr
Dec 7, 4:37 PM ESTWind Chill AdvisoryLWX16 hr
Dec 8, 2:35 PM ESTWind Chill AdvisoryLWX15 hr
Dec 10, 8:35 PM ESTWinter Storm WatchLWX32 hr
Dec 11, 2:13 PM ESTWinter Weather AdvisoryLWX22 hr
Dec 12, 3:15 AM ESTWinter Storm WarningLWX59 hr
Dec 13, 10:28 AM ESTWind AdvisoryLWX36 hr
Dec 13, 10:54 AM ESTWind Chill AdvisoryLWX46 hr
Dec 13, 6:30 PM ESTWind Chill WarningLWX38 hr
Dec 15, 8:41 AM ESTWind Chill AdvisoryLWX12 hr
Dec 15, 2:21 PM ESTWinter Weather AdvisoryLWX29 hr
Dec 23, 1:30 AM ESTWind AdvisoryLWX17 hr
Dec 25, 3:42 PM ESTWinter Weather AdvisoryLWX48 hr
Dec 26, 2:42 PM ESTWind AdvisoryLWX30 hr
Dec 26, 9:37 PM ESTWind Chill AdvisoryLWX14 hr
Dec 27, 3:49 PM ESTWind Chill AdvisoryLWX17 hr
Dec 30, 6:54 AM ESTFreezing Rain AdvisoryLWX5 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 archive20092011

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.