Alert archive / West Virginia / Roane County

Weather alerts in Roane County, West Virginia, 2020

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

Roane County and its neighbors

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

Alerts
107
Warnings
28
Watches
17
Advisories
18
Busiest month
April21 alerts
Busiest day
April 9, 20207 alerts

Over time

By month

Warning verification

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

Roane County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings13746%1060%16 min
Flash flood warnings5340%367%61 min

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Charleston, WV: tornado warnings80100%10%
NWS Charleston, WV: severe thunderstorm warnings1439534%36175%23 min
NWS Charleston, WV: flash flood warnings723749%11471%67 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, 5:02 AM ESTWinter Weather AdvisoryRLX35 hr
Jan 11, 3:53 AM ESTWind AdvisoryRLX30 hr
Jan 11, 4:36 PM ESTSevere Thunderstorm WarningRLX24 min
Jan 24, 6:59 PM ESTSpecial Weather StatementRLX3 hr
Jan 24, 8:54 PM ESTSpecial Weather StatementRLX6 hr
Feb 6, 2:40 PM ESTWinter Weather AdvisoryRLX28 hr
Feb 11, 11:55 AM ESTFlood WatchRLX19 min
Feb 11, 12:14 PM ESTFlash Flood WatchRLX48 hr
Feb 28, 9:21 PM ESTSpecial Weather StatementRLX84 min
Feb 29, 5:58 AM ESTSpecial Weather StatementRLX3 hr
Mar 3, 1:22 PM ESTMesoscale DiscussionSPC113 min
Mar 3, 3:01 PM ESTSpecial Weather StatementRLX29 min
Apr 1, 7:55 PM EDTFrost AdvisoryRLX13 hr
Apr 2, 2:39 PM EDTFrost AdvisoryRLX18 hr
Apr 3, 2:10 PM EDTFrost AdvisoryRLX19 hr
Apr 7, 11:40 PM EDTSevere Thunderstorm WatchSPC6 hr
Apr 8, 3:16 AM EDTMesoscale DiscussionSPC89 min
Apr 8, 5:30 AM EDTMesoscale DiscussionSPC30 min
Apr 8, 10:14 PM EDTMesoscale DiscussionSPC3 hr
Apr 8, 10:51 PM EDTTornado WatchSPC5 hr
Apr 9, 12:41 AM EDTSevere Thunderstorm WarningRLX49 min
Apr 9, 12:54 AM EDTSevere Thunderstorm WarningRLX51 min
Apr 9, 1:23 AM EDTSevere Thunderstorm WarningRLX52 min
Apr 9, 1:36 AM EDTSevere Thunderstorm WarningRLX39 min
Apr 9, 2:25 PM EDTFreeze WatchRLX12 hr
Apr 10, 2:41 AM EDTFreeze WarningRLX31 hr
Apr 11, 2:36 PM EDTHigh Wind WatchRLX22 hr
Apr 12, 12:44 PM EDTWind AdvisoryRLX30 hr
Apr 13, 2:48 PM EDTFrost AdvisoryRLX12 hr
Apr 14, 3:09 AM EDTFreeze WarningRLX30 hr
Apr 15, 2:10 PM EDTFreeze WarningRLX20 hr
Apr 18, 1:53 PM EDTFrost AdvisoryRLX19 hr
Apr 21, 3:32 AM EDTFreeze WarningRLX30 hr
May 3, 2:19 AM EDTFlash Flood WatchRLX20 hr
May 3, 6:35 PM EDTMesoscale DiscussionSPC55 min
May 6, 3:27 AM EDTFrost AdvisoryRLX30 hr
May 7, 4:09 AM EDTFreeze WarningRLX53 hr
May 9, 3:13 AM EDTFreeze WarningRLX30 hr
May 10, 3:12 AM EDTFreeze WarningRLX56 hr
May 10, 6:36 PM EDTMesoscale DiscussionSPC24 min
May 10, 7:26 PM EDTSpecial Weather StatementRLX34 min
May 10, 9:24 PM EDTSevere Thunderstorm WarningRLX23 min
May 12, 2:03 AM EDTFrost AdvisoryRLX31 hr
May 20, 6:50 PM EDTAreal Flood WarningRLX16 hr
May 27, 7:15 PM EDTFlash Flood WatchRLX3 min
May 27, 7:18 PM EDTFlash Flood WatchRLX11 hr
May 28, 4:53 AM EDTSpecial Weather StatementRLX112 min
May 28, 9:46 PM EDTFlash Flood WarningRLX3 hr
Jun 3, 6:24 PM EDTMesoscale DiscussionSPC3 hr
Jun 4, 6:19 PM EDTSpecial Weather StatementRLX26 min
Jun 6, 5:41 PM EDTSevere Thunderstorm WarningRLX34 min
Jun 6, 6:07 PM EDTMesoscale DiscussionSPC113 min
Jun 6, 6:25 PM EDTSpecial Weather StatementRLX20 min
Jun 10, 4:04 PM EDTSpecial Weather StatementRLX116 min
Jun 10, 6:35 PM EDTMesoscale DiscussionSPC85 min
Jun 10, 6:51 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 10, 9:03 PM EDTMesoscale DiscussionSPC57 min
Jun 10, 10:38 PM EDTSpecial Weather StatementRLX37 min
Jun 14, 4:52 PM EDTFlash Flood WarningRLX113 min
Jun 21, 9:49 PM EDTSpecial Weather StatementRLX26 min
Jun 21, 10:42 PM EDTSpecial Weather StatementRLX33 min
Jun 22, 12:08 AM EDTSpecial Weather StatementRLX52 min
Jul 8, 3:14 PM EDTHeat AdvisoryRLX29 hr
Jul 10, 4:11 PM EDTMesoscale DiscussionSPC94 min
Jul 18, 2:11 PM EDTHeat AdvisoryRLX30 hr
Jul 20, 5:45 PM EDTSevere Thunderstorm WarningRLX49 min
Jul 21, 7:16 PM EDTSpecial Weather StatementRLX44 min
Jul 22, 5:46 PM EDTMesoscale DiscussionSPC89 min
Jul 22, 6:09 PM EDTSevere Thunderstorm WarningRLX40 min
Jul 23, 2:54 AM EDTSpecial Weather StatementRLX21 min
Jul 23, 3:11 AM EDTSpecial Weather StatementRLX34 min
Jul 23, 3:50 AM EDTSpecial Weather StatementRLX25 min
Jul 27, 8:49 PM EDTSevere Thunderstorm WarningRLX41 min
Jul 30, 12:22 PM EDTFlash Flood WatchRLX20 hr
Jul 30, 2:58 PM EDTFlash Flood WarningRLX3 hr
Jul 30, 4:28 PM EDTFlash Flood WarningRLX3 hr
Jul 31, 4:45 AM EDTFlash Flood WarningRLX4 hr
Aug 1, 2:19 PM EDTMesoscale DiscussionSPC56 min
Aug 1, 3:57 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 1, 7:17 PM EDTSevere Thunderstorm WarningRLX43 min
Aug 1, 7:27 PM EDTSpecial Weather StatementRLX33 min
Aug 14, 1:01 PM EDTFlash Flood WatchRLX25 hr
Aug 25, 3:10 PM EDTMesoscale DiscussionSPC95 min
Aug 25, 3:34 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 25, 4:35 PM EDTMesoscale DiscussionSPC85 min
Aug 25, 5:24 PM EDTSevere Thunderstorm WarningRLX51 min
Aug 25, 6:15 PM EDTSevere Thunderstorm WarningRLX45 min
Aug 25, 7:07 PM EDTMesoscale DiscussionSPC113 min
Aug 26, 2:04 PM EDTMesoscale DiscussionSPC116 min
Aug 27, 2:14 PM EDTMesoscale DiscussionSPC2 hr
Aug 27, 3:02 PM EDTSpecial Weather StatementRLX28 min
Aug 28, 7:48 PM EDTSpecial Weather StatementRLX27 min
Sep 3, 2:34 AM EDTFlash Flood WatchRLX15 hr
Sep 28, 10:34 PM EDTSpecial Weather StatementRLX56 min
Oct 2, 3:13 AM EDTFrost AdvisoryRLX30 hr
Oct 4, 7:29 PM EDTSpecial Weather StatementRLX31 min
Oct 4, 8:10 PM EDTSpecial Weather StatementRLX35 min
Oct 15, 2:58 PM EDTFreeze WatchRLX23 hr
Oct 16, 1:52 PM EDTFreeze WarningRLX20 hr
Nov 14, 1:46 PM ESTWind AdvisoryRLX41 hr
Nov 30, 3:19 AM ESTWinter Weather AdvisoryRLX49 hr
Dec 7, 6:23 PM ESTSpecial Weather StatementRLX52 min
Dec 15, 2:07 PM ESTWinter Weather AdvisoryRLX37 hr
Dec 23, 4:41 AM ESTWinter Storm WatchRLX9 hr
Dec 23, 1:32 PM ESTWinter Storm WarningRLX41 hr
Dec 24, 4:59 AM ESTWinter Weather AdvisoryRLX35 hr
Dec 24, 2:28 PM ESTMesoscale DiscussionSPC5 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.