Alert archive / West Virginia / Flash Flood Warnings

Flash Flood Warnings in West Virginia, 2017

52 flash flood warnings in 2017. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.

Flash Flood Warnings by county

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

Flash Flood Warnings
52
Busiest month
July20 flash flood warnings
Busiest day
July 29, 20178 flash flood warnings

Over time

By month

Warning verification

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

35 of 52 flash flood warnings covering West Virginia in 2017 had a flash flood report inside them; 67 of 80 flash flood reports fell inside a warning, on average 111 minutes after it went out.

West Virginia, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Flash flood warnings523533%8084%111 min

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Pittsburgh, PA: flash flood warnings766416%26896%112 min
NWS Blacksburg, VA: flash flood warnings241538%5372%80 min
NWS Charleston, WV: flash flood warnings563734%11388%108 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.

IssuedProductOfficeCountiesLasted
Mar 1, 7:36 AM ESTFlash Flood WarningRLXCalhoun, Doddridge, Gilmer, Jackson, Lewis, Ritchie and 2 more5 hr
Mar 1, 9:07 AM ESTFlash Flood WarningRLXJackson, Mason, Wirt5 hr
Mar 1, 9:09 AM ESTFlash Flood WarningRLXDoddridge, Harrison, Pleasants, Ritchie, Tyler, Wirt and 1 more5 hr
Apr 16, 9:43 PM EDTFlash Flood WarningRLXPleasants, Ritchie, Wood3 hr
May 5, 11:36 PM EDTFlash Flood WarningRLXHarrison, Lewis4 hr
May 18, 6:50 PM EDTFlash Flood WarningLWXJefferson3 hr
May 19, 12:10 PM EDTFlash Flood WarningRLXLogan, McDowell, Mingo, Wyoming3 hr
May 20, 3:19 PM EDTFlash Flood WarningRLXPocahontas3 hr
May 20, 5:22 PM EDTFlash Flood WarningRLXCabell3 hr
May 24, 1:53 PM EDTFlash Flood WarningRLXBoone, Lincoln, Logan, Mingo3 hr
May 24, 3:06 PM EDTFlash Flood WarningRLXMingo84 min
May 27, 7:28 PM EDTFlash Flood WarningRLXJackson, Mason, Putnam3 hr
Jun 13, 2:13 PM EDTFlash Flood WarningPBZMarshall3 hr
Jun 13, 2:46 PM EDTFlash Flood WarningPBZMarion, Monongalia3 hr
Jun 16, 11:06 AM EDTFlash Flood WarningRLXKanawha114 min
Jun 16, 5:34 PM EDTFlash Flood WarningPBZMonongalia3 hr
Jun 16, 6:05 PM EDTFlash Flood WarningPBZMarion3 hr
Jun 19, 8:44 AM EDTFlash Flood WarningRLXBoone, Logan, Mingo4 hr
Jun 23, 3:40 PM EDTFlash Flood WarningPBZBrooke, Ohio6 hr
Jun 23, 6:08 PM EDTFlash Flood WarningPBZMarshall4 hr
Jun 23, 7:31 PM EDTFlash Flood WarningRLXJackson, Mason, Pleasants, Tyler, Wirt, Wood10 hr
Jun 23, 8:00 PM EDTFlash Flood WarningRLXCabell, Mason, Putnam, Wayne7 hr
Jun 23, 8:26 PM EDTFlash Flood WarningRLXCabell, Jackson, Kanawha, Lincoln, Mason, Putnam and 3 more4 hr
Jun 23, 8:35 PM EDTFlash Flood WarningRLXPutnam4 hr
Jun 23, 8:55 PM EDTFlash Flood WarningPBZMarion, Monongalia4 hr
Jun 23, 9:24 PM EDTFlash Flood WarningRLXCalhoun, Doddridge, Gilmer, Harrison, Lewis, Ritchie and 2 more3 hr
Jun 23, 9:41 PM EDTFlash Flood WarningRLXBoone, Braxton, Clay, Fayette, Kanawha, Lincoln and 6 more3 hr
Jul 4, 3:51 PM EDTFlash Flood WarningLWXMineral3 hr
Jul 5, 9:30 PM EDTFlash Flood WarningPBZWetzel6 hr
Jul 14, 8:02 PM EDTFlash Flood WarningRLXMingo3 hr
Jul 22, 2:50 PM EDTFlash Flood WarningRLXBarbour, Harrison, Taylor4 hr
Jul 22, 4:21 PM EDTFlash Flood WarningRLXDoddridge, Harrison, Lewis4 hr
Jul 22, 5:56 PM EDTFlash Flood WarningRLXPleasants, Ritchie, Wood4 hr
Jul 22, 6:43 PM EDTFlash Flood WarningRLXGilmer, Lewis, Upshur4 hr
Jul 22, 6:44 PM EDTFlash Flood WarningPBZMarion, Monongalia3 hr
Jul 23, 8:55 PM EDTFlash Flood WarningPBZMarshall, Ohio4 hr
Jul 27, 4:27 PM EDTFlash Flood WarningRLXMingo, Wayne4 hr
Jul 28, 2:31 PM EDTFlash Flood WarningRLXCabell, Kanawha, Lincoln, Mason, Putnam, Wayne3 hr
Jul 28, 7:07 PM EDTFlash Flood WarningPBZPreston5 hr
Jul 28, 9:19 PM EDTFlash Flood WarningPBZBrooke, Ohio9 hr
Jul 28, 9:44 PM EDTFlash Flood WarningPBZMarshall8 hr
Jul 28, 10:21 PM EDTFlash Flood WarningLWXBerkeley, Jefferson4 hr
Jul 28, 10:59 PM EDTFlash Flood WarningPBZBrooke, Hancock5 hr
Jul 28, 11:34 PM EDTFlash Flood WarningPBZMarion, Monongalia, Wetzel9 hr
Jul 29, 12:23 AM EDTFlash Flood WarningRLXHarrison6 hr
Jul 29, 1:23 AM EDTFlash Flood WarningRLXDoddridge, Harrison4 hr
Jul 29, 3:09 AM EDTFlash Flood WarningRLXHarrison, Lewis3 hr
Aug 2, 2:58 PM EDTFlash Flood WarningRLXMcDowell3 hr
Oct 23, 6:58 PM EDTFlash Flood WarningRNKGreenbrier, Monroe6 hr
Nov 6, 3:45 AM ESTFlash Flood WarningRLXWood6 hr
Nov 6, 4:09 AM ESTFlash Flood WarningRLXWood6 hr
Nov 6, 4:42 AM ESTFlash Flood WarningRLXPleasants, Ritchie, Tyler, Wirt, Wood3 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

5 more counties

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordThe 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.