Alert archive / Virginia / Rockingham County

Weather alerts in Rockingham County, Virginia, 2017

91 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rockingham County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
91
Warnings
28
Watches
12
Advisories
34
Busiest month
March16 alerts
Busiest day
March 1, 20177 alerts

Over time

By month

Warning verification

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

Rockingham County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10730%10100%11 min
Flash flood warnings440%7100%79 min

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 6, 2:12 PM ESTWind Chill AdvisoryLWX61 hr
Jan 10, 1:32 PM ESTFreezing Rain AdvisoryLWX14 hr
Jan 13, 3:32 AM ESTFreezing Rain AdvisoryLWX36 hr
Jan 21, 12:06 AM ESTDense Fog AdvisoryLWX13 hr
Jan 22, 1:51 PM ESTWind AdvisoryLWX26 hr
Jan 23, 10:37 AM ESTFlood WatchLWX5 hr
Jan 23, 12:18 PM ESTWinter Weather AdvisoryLWX17 hr
Jan 26, 3:35 AM ESTWind AdvisoryLWX15 hr
Jan 29, 3:42 AM ESTWinter Weather AdvisoryLWX33 hr
Jan 31, 4:01 AM ESTWind AdvisoryLWX12 hr
Feb 7, 7:12 PM ESTWind AdvisoryLWX8 hr
Feb 8, 10:17 AM ESTWinter Weather AdvisoryLWX21 hr
Feb 10, 8:40 PM ESTWind AdvisoryLWX12 hr
Feb 11, 2:22 PM ESTHigh Wind WatchLWX13 hr
Feb 12, 3:36 AM ESTHigh Wind WarningLWX32 hr
Feb 12, 3:36 AM ESTWind AdvisoryLWX37 hr
Mar 1, 9:44 AM ESTMesoscale DiscussionSPC91 min
Mar 1, 10:38 AM ESTSevere Thunderstorm WatchSPC4 hr
Mar 1, 11:56 AM ESTSevere Thunderstorm WarningLWX49 min
Mar 1, 12:25 PM ESTMesoscale DiscussionSPC65 min
Mar 1, 12:26 PM ESTSevere Thunderstorm WarningLWX49 min
Mar 1, 12:32 PM ESTSevere Thunderstorm WarningLWX43 min
Mar 1, 2:47 PM ESTWind AdvisoryLWX18 hr
Mar 11, 7:52 PM ESTWinter Storm WatchLWX31 hr
Mar 12, 2:58 PM EDTWinter Storm WarningLWX47 hr
Mar 13, 4:00 AM EDTWinter Weather AdvisoryLWX34 hr
Mar 14, 3:22 AM EDTMesoscale DiscussionSPC5 hr
Mar 14, 3:00 PM EDTWind Chill AdvisoryLWX19 hr
Mar 15, 3:52 AM EDTWind AdvisoryLWX16 hr
Mar 15, 1:42 PM EDTWind Chill AdvisoryLWX19 hr
Mar 18, 3:26 PM EDTMesoscale DiscussionSPC3 hr
Mar 21, 10:00 AM EDTSpecial Weather StatementLWX15 min
Apr 6, 12:50 PM EDTWind AdvisoryLWX30 hr
Apr 6, 4:24 PM EDTFreeze WatchLWX21 hr
Apr 7, 1:31 PM EDTFreeze WarningLWX19 hr
Apr 8, 2:10 PM EDTFreeze WarningLWX18 hr
Apr 20, 4:55 PM EDTSevere Thunderstorm WarningLWX35 min
Apr 21, 4:19 PM EDTMesoscale DiscussionSPC56 min
Apr 30, 3:25 PM EDTMesoscale DiscussionSPC95 min
May 1, 2:29 PM EDTMesoscale DiscussionSPC2 hr
May 1, 5:54 PM EDTSevere Thunderstorm WatchSPC5 hr
May 2, 4:40 AM EDTWind AdvisoryLWX13 hr
May 4, 11:48 AM EDTFlood WatchLWX23 hr
May 8, 12:41 PM EDTFrost AdvisoryLWX19 hr
May 8, 12:41 PM EDTFreeze WarningLWX19 hr
May 19, 3:36 PM EDTMesoscale DiscussionSPC114 min
May 25, 10:25 AM EDTAreal Flood WarningLWX10 hr
May 25, 8:34 PM EDTAreal Flood WarningLWX6 hr
May 26, 2:06 AM EDTAreal Flood WarningLWX6 hr
May 27, 4:16 PM EDTMesoscale DiscussionSPC89 min
Jun 14, 1:17 PM EDTMesoscale DiscussionSPC2 hr
Jun 14, 4:01 PM EDTSevere Thunderstorm WarningLWX30 min
Jun 16, 1:30 PM EDTFlash Flood WatchLWX7 hr
Jun 16, 1:52 PM EDTFlash Flood WarningLWX3 hr
Jun 16, 3:16 PM EDTFlash Flood WarningLWX3 hr
Jun 16, 4:08 PM EDTFlash Flood WarningLWX3 hr
Jun 16, 4:34 PM EDTAreal Flood WarningLWX6 hr
Jun 16, 6:08 PM EDTAreal Flood WarningLWX6 hr
Jun 16, 7:05 PM EDTAreal Flood WarningLWX3 hr
Jun 19, 12:48 PM EDTSevere Thunderstorm WatchSPC8 hr
Jun 19, 1:54 PM EDTSevere Thunderstorm WarningLWX51 min
Jun 19, 2:18 PM EDTAreal Flood WarningLWX4 hr
Jul 6, 6:20 AM EDTFlash Flood WatchLWX20 hr
Jul 7, 3:35 PM EDTMesoscale DiscussionSPC85 min
Jul 14, 1:09 PM EDTMesoscale DiscussionSPC2 hr
Jul 14, 1:40 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 14, 4:02 PM EDTSevere Thunderstorm WarningLWX26 min
Jul 14, 4:23 PM EDTMesoscale DiscussionSPC67 min
Jul 18, 2:31 PM EDTMesoscale DiscussionSPC59 min
Jul 18, 7:08 PM EDTFlash Flood WarningLWX3 hr
Jul 21, 2:54 PM EDTSevere Thunderstorm WarningLWX51 min
Jul 27, 1:47 PM EDTFlash Flood WatchLWX48 hr
Jul 28, 4:46 PM EDTAreal Flood WarningLWX6 hr
Aug 4, 7:17 PM EDTSevere Thunderstorm WarningLWX28 min
Aug 4, 7:44 PM EDTSevere Thunderstorm WarningLWX46 min
Aug 15, 10:31 PM EDTDense Fog AdvisoryLWX11 hr
Sep 5, 2:31 PM EDTMesoscale DiscussionSPC59 min
Oct 16, 12:30 PM EDTFrost AdvisoryLWX20 hr
Oct 17, 1:39 PM EDTFreeze WarningLWX19 hr
Oct 23, 6:31 PM EDTWind AdvisoryLWX10 hr
Oct 23, 7:34 PM EDTMesoscale DiscussionSPC116 min
Oct 29, 3:44 AM EDTWind AdvisoryLWX30 hr
Nov 16, 5:47 AM ESTWind AdvisoryLWX9 hr
Nov 18, 3:40 AM ESTWind AdvisoryLWX33 hr
Dec 8, 5:50 AM ESTWinter Weather AdvisoryLWX51 hr
Dec 11, 1:19 PM ESTWind Chill AdvisoryLWX47 hr
Dec 13, 11:50 PM ESTWind AdvisoryLWX12 hr
Dec 24, 10:35 AM ESTWind AdvisoryLWX26 hr
Dec 27, 1:36 PM ESTWind Chill AdvisoryLWX18 hr
Dec 30, 2:12 PM ESTWind Chill AdvisoryLWX69 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.