Alert archive / Virginia / Henry County

Weather alerts in Henry County, Virginia, 2024

111 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Henry County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts
111
Warnings
49
Watches
17
Advisories
13
Busiest month
September30 alerts
Busiest day
September 29, 202411 alerts

Over time

By month

Warning verification

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

2 of 18 tornado warnings covering Henry County in 2024 had a tornado report inside them.

Henry County, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings18289%0
Severe thunderstorm warnings211719%7047%16 min
Flash flood warnings6517%2100%106 min

Each office's whole area, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Blacksburg, VA: tornado warnings72593%2326%17 min
NWS Blacksburg, VA: severe thunderstorm warnings19214823%73866%24 min
NWS Blacksburg, VA: flash flood warnings895340%21073%169 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 5, 4:32 AM ESTWinter Weather AdvisoryRNK34 hr
Jan 8, 3:18 PM ESTFlood WatchRNK30 hr
Jan 9, 1:13 PM ESTAreal Flood WarningRNK15 hr
Jan 9, 1:24 PM ESTSevere Thunderstorm WarningRNK51 min
Jan 9, 1:32 PM ESTMesoscale DiscussionSPC58 min
Jan 9, 1:53 PM ESTFlash Flood WarningRNK5 hr
Jan 9, 1:57 PM ESTTornado WarningRNK33 min
Jan 9, 2:00 PM ESTAreal Flood WarningRNK14 hr
Jan 9, 2:09 PM ESTSevere Thunderstorm WarningRNK66 min
Jan 9, 2:24 PM ESTSevere Thunderstorm WarningRNK36 min
Jan 11, 1:08 PM ESTFlood WatchRNK31 hr
Jan 14, 3:24 AM ESTWinter Weather AdvisoryRNK52 hr
Jan 26, 2:35 PM ESTFlood WatchRNK40 hr
Jan 27, 11:22 PM ESTAreal Flood AdvisoryRNK6 hr
Feb 12, 3:29 AM ESTWind AdvisoryRNK33 hr
Feb 13, 12:50 AM ESTSpecial Weather StatementRNK40 min
Feb 13, 1:30 AM ESTSpecial Weather StatementRNK45 min
Mar 18, 3:05 PM EDTFire Weather WatchRNK24 hr
Mar 19, 3:02 PM EDTRed Flag WarningRNK29 hr
Apr 11, 6:24 PM EDTMesoscale DiscussionSPC2 hr
Apr 11, 6:43 PM EDTTornado WatchSPC4 hr
Apr 11, 8:24 PM EDTSevere Thunderstorm WarningRNK51 min
Apr 11, 8:37 PM EDTSevere Thunderstorm WarningRNK38 min
Apr 11, 8:51 PM EDTMesoscale DiscussionSPC84 min
Apr 11, 9:00 PM EDTSevere Thunderstorm WarningRNK60 min
Apr 11, 9:07 PM EDTTornado WarningRNK23 min
Apr 11, 9:08 PM EDTSevere Thunderstorm WarningRNK67 min
Apr 11, 9:21 PM EDTTornado WarningRNK24 min
Apr 15, 1:50 PM EDTSevere Thunderstorm WatchSPC8 hr
Apr 15, 6:57 PM EDTMesoscale DiscussionSPC93 min
May 6, 10:54 PM EDTSevere Thunderstorm WarningRNK66 min
May 7, 5:05 PM EDTMesoscale DiscussionSPC85 min
May 7, 5:38 PM EDTSevere Thunderstorm WarningRNK16 min
May 7, 7:09 PM EDTSevere Thunderstorm WarningRNK36 min
May 17, 6:14 PM EDTSpecial Weather StatementRNK16 min
May 17, 6:29 PM EDTTornado WarningRNK18 min
May 17, 6:55 PM EDTSpecial Weather StatementRNK35 min
May 23, 3:17 PM EDTSpecial Weather StatementRNK28 min
May 23, 3:32 PM EDTSevere Thunderstorm WarningRNK43 min
May 26, 1:46 PM EDTSevere Thunderstorm WatchSPC9 hr
May 26, 5:36 PM EDTMesoscale DiscussionSPC114 min
May 26, 8:22 PM EDTSpecial Weather StatementRNK23 min
Jun 30, 12:11 PM EDTMesoscale DiscussionSPC2 hr
Jun 30, 4:37 PM EDTSevere Thunderstorm WarningRNK68 min
Jun 30, 5:12 PM EDTSpecial Weather StatementRNK33 min
Jun 30, 5:45 PM EDTSevere Thunderstorm WarningRNK60 min
Jul 4, 2:39 PM EDTHeat AdvisoryRNK29 hr
Jul 4, 5:28 PM EDTSevere Thunderstorm WarningRNK77 min
Jul 4, 6:47 PM EDTSpecial Weather StatementRNK28 min
Jul 5, 2:49 PM EDTSevere Thunderstorm WarningRNK41 min
Jul 5, 5:32 PM EDTSpecial Weather StatementRNK28 min
Jul 8, 2:40 PM EDTHeat AdvisoryRNK29 hr
Jul 9, 2:17 PM EDTHeat AdvisoryRNK30 hr
Jul 16, 3:19 PM EDTMesoscale DiscussionSPC86 min
Jul 18, 10:20 AM EDTSpecial Weather StatementRNK40 min
Jul 18, 11:30 AM EDTFlood WatchRNK6 hr
Jul 18, 11:30 AM EDTMesoscale DiscussionSPC2 hr
Jul 20, 9:42 AM EDTFlood WatchRNK10 hr
Jul 20, 10:04 AM EDTFlash Flood WarningRNK3 hr
Jul 21, 3:41 AM EDTDense Fog AdvisoryRNK5 hr
Jul 23, 3:57 PM EDTMesoscale DiscussionSPC3 hr
Jul 24, 9:20 PM EDTAreal Flood AdvisoryRNK6 hr
Aug 3, 3:34 AM EDTFlood WatchRNK21 hr
Aug 3, 1:39 PM EDTMesoscale DiscussionSPC96 min
Aug 3, 2:08 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 3, 5:27 PM EDTMesoscale DiscussionSPC93 min
Aug 6, 2:04 PM EDTFlood WatchRNK62 hr
Aug 8, 2:12 PM EDTFlash Flood Warning Considerable damage threatRNK8 hr
Aug 8, 2:48 PM EDTSpecial Weather StatementRNK27 min
Aug 8, 9:57 PM EDTAreal Flood WarningRNK12 hr
Aug 18, 2:58 PM EDTMesoscale DiscussionSPC2 hr
Aug 18, 3:28 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 18, 3:49 PM EDTSpecial Weather StatementRNK56 min
Aug 30, 3:53 PM EDTSevere Thunderstorm WarningRNK37 min
Aug 30, 4:25 PM EDTSevere Thunderstorm WarningRNK18 min
Aug 31, 8:10 PM EDTSevere Thunderstorm WarningRNK31 min
Aug 31, 9:37 PM EDTSpecial Weather StatementRNK23 min
Sep 1, 7:36 PM EDTSpecial Weather StatementRNK39 min
Sep 24, 3:34 PM EDTFlood WatchRNK16 hr
Sep 24, 4:48 PM EDTSpecial Weather StatementRNK27 min
Sep 24, 4:59 PM EDTSevere Thunderstorm WarningRNK61 min
Sep 24, 5:52 PM EDTSevere Thunderstorm WarningRNK53 min
Sep 24, 6:04 PM EDTFlash Flood WarningRNK4 hr
Sep 24, 6:08 PM EDTTornado WarningRNK37 min
Sep 25, 2:12 AM EDTFlood WatchRNK66 hr
Sep 25, 7:56 PM EDTSpecial Weather StatementRNK34 min
Sep 26, 2:09 PM EDTWind AdvisoryRNK30 hr
Sep 27, 8:02 AM EDTTornado WatchSPC12 hr
Sep 27, 11:08 AM EDTTornado WarningRNK19 min
Sep 27, 2:39 PM EDTTornado WarningRNK36 min
Sep 27, 3:28 PM EDTTornado WarningRNK32 min
Sep 27, 3:28 PM EDTMesoscale DiscussionSPC2 hr
Sep 27, 3:57 PM EDTTornado WarningRNK33 min
Sep 29, 3:14 PM EDTTornado WarningRNK31 min
Sep 29, 3:16 PM EDTTornado WarningRNK29 min
Sep 29, 3:22 PM EDTTornado WarningRNK23 min
Sep 29, 3:25 PM EDTSevere Thunderstorm WarningRNK65 min
Sep 29, 3:37 PM EDTTornado WarningRNK23 min
Sep 29, 3:42 PM EDTTornado WarningRNK33 min
Sep 29, 3:46 PM EDTTornado WarningRNK29 min
Sep 29, 3:58 PM EDTTornado WarningRNK32 min
Sep 29, 4:27 PM EDTTornado WarningRNK33 min
Sep 29, 4:53 PM EDTTornado WarningRNK37 min
Sep 29, 5:01 PM EDTFlash Flood WarningRNK3 hr
Sep 30, 3:59 AM EDTFlood WatchRNK23 hr
Sep 30, 10:37 PM EDTFlash Flood WarningRNK5 hr
Oct 16, 10:56 AM EDTFrost AdvisoryRNK22 hr
Oct 17, 1:28 PM EDTFrost AdvisoryRNK20 hr
Oct 27, 3:03 AM EDTFrost AdvisoryRNK30 hr
Dec 29, 11:07 AM ESTSpecial Weather StatementRNK83 min
Dec 29, 6:57 PM ESTSpecial Weather StatementRNK33 min

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 archive20232025

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.