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
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 52 | 35 | 33% | 80 | 84% | 111 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: flash flood warnings | 76 | 64 | 16% | 268 | 96% | 112 min |
| NWS Blacksburg, VA: flash flood warnings | 24 | 15 | 38% | 53 | 72% | 80 min |
| NWS Charleston, WV: flash flood warnings | 56 | 37 | 34% | 113 | 88% | 108 min |
| NWS Baltimore/Washington: flash flood warnings | 49 | 34 | 31% | 130 | 81% | 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 7:36 AM EST | Flash Flood Warning | RLX | Calhoun, Doddridge, Gilmer, Jackson, Lewis, Ritchie and 2 more | 5 hr |
| Mar 1, 9:07 AM EST | Flash Flood Warning | RLX | Jackson, Mason, Wirt | 5 hr |
| Mar 1, 9:09 AM EST | Flash Flood Warning | RLX | Doddridge, Harrison, Pleasants, Ritchie, Tyler, Wirt and 1 more | 5 hr |
| Apr 16, 9:43 PM EDT | Flash Flood Warning | RLX | Pleasants, Ritchie, Wood | 3 hr |
| May 5, 11:36 PM EDT | Flash Flood Warning | RLX | Harrison, Lewis | 4 hr |
| May 18, 6:50 PM EDT | Flash Flood Warning | LWX | Jefferson | 3 hr |
| May 19, 12:10 PM EDT | Flash Flood Warning | RLX | Logan, McDowell, Mingo, Wyoming | 3 hr |
| May 20, 3:19 PM EDT | Flash Flood Warning | RLX | Pocahontas | 3 hr |
| May 20, 5:22 PM EDT | Flash Flood Warning | RLX | Cabell | 3 hr |
| May 24, 1:53 PM EDT | Flash Flood Warning | RLX | Boone, Lincoln, Logan, Mingo | 3 hr |
| May 24, 3:06 PM EDT | Flash Flood Warning | RLX | Mingo | 84 min |
| May 27, 7:28 PM EDT | Flash Flood Warning | RLX | Jackson, Mason, Putnam | 3 hr |
| Jun 13, 2:13 PM EDT | Flash Flood Warning | PBZ | Marshall | 3 hr |
| Jun 13, 2:46 PM EDT | Flash Flood Warning | PBZ | Marion, Monongalia | 3 hr |
| Jun 16, 11:06 AM EDT | Flash Flood Warning | RLX | Kanawha | 114 min |
| Jun 16, 5:34 PM EDT | Flash Flood Warning | PBZ | Monongalia | 3 hr |
| Jun 16, 6:05 PM EDT | Flash Flood Warning | PBZ | Marion | 3 hr |
| Jun 19, 8:44 AM EDT | Flash Flood Warning | RLX | Boone, Logan, Mingo | 4 hr |
| Jun 23, 3:40 PM EDT | Flash Flood Warning | PBZ | Brooke, Ohio | 6 hr |
| Jun 23, 6:08 PM EDT | Flash Flood Warning | PBZ | Marshall | 4 hr |
| Jun 23, 7:31 PM EDT | Flash Flood Warning | RLX | Jackson, Mason, Pleasants, Tyler, Wirt, Wood | 10 hr |
| Jun 23, 8:00 PM EDT | Flash Flood Warning | RLX | Cabell, Mason, Putnam, Wayne | 7 hr |
| Jun 23, 8:26 PM EDT | Flash Flood Warning | RLX | Cabell, Jackson, Kanawha, Lincoln, Mason, Putnam and 3 more | 4 hr |
| Jun 23, 8:35 PM EDT | Flash Flood Warning | RLX | Putnam | 4 hr |
| Jun 23, 8:55 PM EDT | Flash Flood Warning | PBZ | Marion, Monongalia | 4 hr |
| Jun 23, 9:24 PM EDT | Flash Flood Warning | RLX | Calhoun, Doddridge, Gilmer, Harrison, Lewis, Ritchie and 2 more | 3 hr |
| Jun 23, 9:41 PM EDT | Flash Flood Warning | RLX | Boone, Braxton, Clay, Fayette, Kanawha, Lincoln and 6 more | 3 hr |
| Jul 4, 3:51 PM EDT | Flash Flood Warning | LWX | Mineral | 3 hr |
| Jul 5, 9:30 PM EDT | Flash Flood Warning | PBZ | Wetzel | 6 hr |
| Jul 14, 8:02 PM EDT | Flash Flood Warning | RLX | Mingo | 3 hr |
| Jul 22, 2:50 PM EDT | Flash Flood Warning | RLX | Barbour, Harrison, Taylor | 4 hr |
| Jul 22, 4:21 PM EDT | Flash Flood Warning | RLX | Doddridge, Harrison, Lewis | 4 hr |
| Jul 22, 5:56 PM EDT | Flash Flood Warning | RLX | Pleasants, Ritchie, Wood | 4 hr |
| Jul 22, 6:43 PM EDT | Flash Flood Warning | RLX | Gilmer, Lewis, Upshur | 4 hr |
| Jul 22, 6:44 PM EDT | Flash Flood Warning | PBZ | Marion, Monongalia | 3 hr |
| Jul 23, 8:55 PM EDT | Flash Flood Warning | PBZ | Marshall, Ohio | 4 hr |
| Jul 27, 4:27 PM EDT | Flash Flood Warning | RLX | Mingo, Wayne | 4 hr |
| Jul 28, 2:31 PM EDT | Flash Flood Warning | RLX | Cabell, Kanawha, Lincoln, Mason, Putnam, Wayne | 3 hr |
| Jul 28, 7:07 PM EDT | Flash Flood Warning | PBZ | Preston | 5 hr |
| Jul 28, 9:19 PM EDT | Flash Flood Warning | PBZ | Brooke, Ohio | 9 hr |
| Jul 28, 9:44 PM EDT | Flash Flood Warning | PBZ | Marshall | 8 hr |
| Jul 28, 10:21 PM EDT | Flash Flood Warning | LWX | Berkeley, Jefferson | 4 hr |
| Jul 28, 10:59 PM EDT | Flash Flood Warning | PBZ | Brooke, Hancock | 5 hr |
| Jul 28, 11:34 PM EDT | Flash Flood Warning | PBZ | Marion, Monongalia, Wetzel | 9 hr |
| Jul 29, 12:23 AM EDT | Flash Flood Warning | RLX | Harrison | 6 hr |
| Jul 29, 1:23 AM EDT | Flash Flood Warning | RLX | Doddridge, Harrison | 4 hr |
| Jul 29, 3:09 AM EDT | Flash Flood Warning | RLX | Harrison, Lewis | 3 hr |
| Aug 2, 2:58 PM EDT | Flash Flood Warning | RLX | McDowell | 3 hr |
| Oct 23, 6:58 PM EDT | Flash Flood Warning | RNK | Greenbrier, Monroe | 6 hr |
| Nov 6, 3:45 AM EST | Flash Flood Warning | RLX | Wood | 6 hr |
| Nov 6, 4:09 AM EST | Flash Flood Warning | RLX | Wood | 6 hr |
| Nov 6, 4:42 AM EST | Flash Flood Warning | RLX | Pleasants, Ritchie, Tyler, Wirt, Wood | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Harrison County8
- Wood County8
- Mingo County7
- Lewis County6
- Ritchie County6
- Wirt County6
- Mason County6
- Doddridge County5
- Jackson County5
- Pleasants County5
- Putnam County5
- Marion County5
- Monongalia County5
- Tyler County4
- Logan County4
- Cabell County4
- Lincoln County4
- Marshall County4
- Kanawha County4
- Wayne County4
- Gilmer County3
- Boone County3
- Brooke County3
- Ohio County3
- Calhoun County2
- Roane County2
- Jefferson County2
- McDowell County2
- Wyoming County2
- Taylor County2
- Wetzel County2
- Pocahontas County1
- Braxton County1
- Clay County1
- Fayette County1
- Nicholas County1
- Raleigh County1
- Mineral County1
- Barbour County1
- Upshur County1
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.