Alert archive / West Virginia / Flash Flood Warnings
Flash Flood Warnings in West Virginia, 2018
101 flash flood warnings in 2018. 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 2018. Tap one for its archive.
- Flash Flood Warnings
- 101
- Busiest month
- May25 flash flood warnings
- Busiest day
- June 22, 20186 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.
64 of 101 flash flood warnings covering West Virginia in 2018 had a flash flood report inside them; 146 of 190 flash flood reports fell inside a warning, on average 65 minutes after it went out.
West Virginia, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 101 | 64 | 37% | 190 | 77% | 65 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: flash flood warnings | 79 | 54 | 32% | 204 | 84% | 62 min |
| NWS Charleston, WV: flash flood warnings | 80 | 48 | 40% | 163 | 74% | 60 min |
| NWS Baltimore/Washington: flash flood warnings | 87 | 38 | 56% | 129 | 89% | 103 min |
| NWS Blacksburg, VA: flash flood warnings | 132 | 82 | 38% | 290 | 84% | 132 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 |
|---|---|---|---|---|
| Feb 10, 11:35 PM EST | Flash Flood Warning | RNK | Mercer, Summers | 6 hr |
| Apr 16, 4:13 AM EDT | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 85 min |
| May 7, 8:37 PM EDT | Flash Flood Warning | RLX | Lincoln | 107 min |
| May 10, 3:24 PM EDT | Flash Flood Warning | RLX | Lewis | 115 min |
| May 14, 3:46 PM EDT | Flash Flood Warning | PBZ | Monongalia | 3 hr |
| May 14, 4:03 PM EDT | Flash Flood Warning | PBZ | Marion, Monongalia, Preston | 3 hr |
| May 15, 8:20 PM EDT | Flash Flood Warning | LWX | Jefferson | 3 hr |
| May 17, 6:08 PM EDT | Flash Flood Warning | RNK | Monroe, Summers | 6 hr |
| May 19, 9:38 PM EDT | Flash Flood Warning | PBZ | Marion | 2 hr |
| May 21, 5:02 PM EDT | Flash Flood Warning | RNK | Greenbrier | 4 hr |
| May 21, 8:03 PM EDT | Flash Flood Warning | RLX | Braxton, Lewis, Nicholas, Pocahontas, Randolph, Upshur and 1 more | 3 hr |
| May 22, 5:09 PM EDT | Flash Flood Warning | RLX | Webster | 3 hr |
| May 22, 9:55 PM EDT | Flash Flood Warning | RLX | Pleasants, Tyler | 3 hr |
| May 22, 11:04 PM EDT | Flash Flood Warning | RLX | Doddridge, Pleasants, Ritchie, Tyler, Wood | 3 hr |
| May 23, 12:21 AM EDT | Flash Flood Warning | RLX | Braxton, Calhoun, Gilmer, Ritchie, Roane, Wirt and 1 more | 3 hr |
| May 26, 11:14 AM EDT | Flash Flood Warning | RNK | Mercer | 5 hr |
| May 26, 5:40 PM EDT | Flash Flood Warning | RLX | Kanawha, Putnam | 6 hr |
| May 26, 6:33 PM EDT | Flash Flood Warning | RLX | Pocahontas, Randolph | 89 min |
| May 27, 5:45 PM EDT | Flash Flood Warning | RNK | Mercer | 3 hr |
| May 27, 5:57 PM EDT | Flash Flood Warning | LWX | Grant, Hampshire, Hardy, Mineral | 4 hr |
| May 27, 6:16 PM EDT | Flash Flood Warning | RLX | Kanawha, Lincoln, Putnam | 3 hr |
| May 27, 6:42 PM EDT | Flash Flood Warning | RNK | Mercer | 4 hr |
| May 27, 8:07 PM EDT | Flash Flood Warning | RLX | Randolph | 3 hr |
| May 27, 9:25 PM EDT | Flash Flood Warning | RLX | Lewis, Upshur | 3 hr |
| May 28, 2:54 PM EDT | Flash Flood Warning | RLX | Pocahontas, Randolph | 2 hr |
| May 28, 6:14 PM EDT | Flash Flood Warning | RLX | Cabell, Wayne | 3 hr |
| May 31, 4:41 PM EDT | Flash Flood Warning | RLX | Putnam | 3 hr |
| Jun 1, 9:46 PM EDT | Flash Flood Warning | LWX | Hampshire | 3 hr |
| Jun 2, 9:41 AM EDT | Flash Flood Warning | PBZ | Tucker | 6 hr |
| Jun 2, 12:37 PM EDT | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 3 hr |
| Jun 8, 9:39 PM EDT | Flash Flood Warning | RLX | Raleigh | 2 hr |
| Jun 10, 6:05 PM EDT | Flash Flood Warning | PBZ | Hancock | 116 min |
| Jun 10, 8:04 PM EDT | Flash Flood Warning | PBZ | Brooke, Ohio | 3 hr |
| Jun 12, 6:18 PM EDT | Flash Flood Warning | RLX | Lincoln, Mingo, Wayne | 116 min |
| Jun 17, 7:20 PM EDT | Flash Flood Warning | RLX | Kanawha, Putnam | 2 hr |
| Jun 17, 7:47 PM EDT | Flash Flood Warning | RLX | Kanawha | 109 min |
| Jun 19, 6:09 PM EDT | Flash Flood Warning | RLX | Barbour, Randolph | 3 hr |
| Jun 21, 2:15 PM EDT | Flash Flood Warning | RLX | Calhoun, Jackson, Kanawha, Putnam, Roane | 8 hr |
| Jun 22, 1:58 PM EDT | Flash Flood Warning | PBZ | Wetzel | 3 hr |
| Jun 22, 2:08 PM EDT | Flash Flood Warning | RLX | Harrison | 3 hr |
| Jun 22, 2:29 PM EDT | Flash Flood Warning | RLX | Barbour, Doddridge, Harrison, Lewis, Randolph, Taylor and 1 more | 3 hr |
| Jun 22, 3:21 PM EDT | Flash Flood Warning | RLX | Tyler | 3 hr |
| Jun 22, 7:49 PM EDT | Flash Flood Warning | RLX | Mason | 10 hr |
| Jun 22, 7:57 PM EDT | Flash Flood Warning | RLX | Doddridge, Gilmer, Lewis | 6 hr |
| Jun 27, 6:47 PM EDT | Flash Flood Warning | RLX | Pleasants, Tyler | 3 hr |
| Jun 27, 10:39 PM EDT | Flash Flood Warning | RLX | Barbour, Harrison | 7 hr |
| Jun 27, 11:08 PM EDT | Flash Flood Warning | PBZ | Tucker | 6 hr |
| Jul 1, 7:02 PM EDT | Flash Flood Warning | RLX | Kanawha | 3 hr |
| Jul 1, 7:26 PM EDT | Flash Flood Warning | RLX | Cabell, Wayne | 3 hr |
| Jul 2, 9:51 PM EDT | Flash Flood Warning | RLX | Jackson, Kanawha, Lincoln, Putnam, Roane, Wirt | 6 hr |
| Jul 3, 4:46 PM EDT | Flash Flood Warning | PBZ | Tucker | 89 min |
| Jul 4, 4:10 PM EDT | Flash Flood Warning | LWX | Hampshire | 4 hr |
| Jul 4, 4:18 PM EDT | Flash Flood Warning | RLX | Nicholas, Webster | 3 hr |
| Jul 4, 6:44 PM EDT | Flash Flood Warning | RLX | Taylor | 2 hr |
| Jul 4, 7:29 PM EDT | Flash Flood Warning | RLX | Harrison | 2 hr |
| Jul 5, 11:49 AM EDT | Flash Flood Warning | PBZ | Marshall, Wetzel | 81 min |
| Jul 5, 1:36 PM EDT | Flash Flood Warning | LWX | Pendleton | 3 hr |
| Jul 15, 4:42 PM EDT | Flash Flood Warning | RLX | Randolph | 3 hr |
| Jul 15, 4:49 PM EDT | Flash Flood Warning | PBZ | Tucker | 3 hr |
| Jul 15, 4:55 PM EDT | Flash Flood Warning | RLX | Barbour, Harrison, Randolph, Taylor | 3 hr |
| Jul 15, 8:09 PM EDT | Flash Flood Warning | RLX | Braxton | 64 min |
| Jul 27, 11:00 AM EDT | Flash Flood Warning | RLX | Calhoun, Roane | 3 hr |
| Jul 27, 5:25 PM EDT | Flash Flood Warning | RLX | Kanawha | 2 hr |
| Jul 29, 9:04 PM EDT | Flash Flood Warning | RNK | Mercer | 6 hr |
| Jul 30, 9:42 AM EDT | Flash Flood Warning | RLX | Braxton, Lewis, Upshur | 6 hr |
| Jul 30, 10:42 AM EDT | Flash Flood Warning | RLX | Boone, Kanawha, Lincoln | 3 hr |
| Aug 3, 9:02 AM EDT | Flash Flood Warning | RLX | Calhoun, Jackson, Roane, Wirt | 3 hr |
| Aug 3, 9:50 AM EDT | Flash Flood Warning | RLX | Putnam | 115 min |
| Aug 3, 10:34 AM EDT | Flash Flood Warning | RLX | Calhoun, Doddridge, Gilmer, Lewis, Ritchie, Wirt | 3 hr |
| Aug 3, 11:34 AM EDT | Flash Flood Warning | RLX | Doddridge, Harrison, Lewis | 3 hr |
| Aug 5, 2:10 PM EDT | Flash Flood Warning | PBZ | Marshall, Ohio | 2 hr |
| Aug 7, 4:33 PM EDT | Flash Flood Warning | RLX | Braxton | 3 hr |
| Aug 10, 4:37 PM EDT | Flash Flood Warning | PBZ | Brooke, Hancock | 3 hr |
| Aug 10, 9:46 PM EDT | Flash Flood Warning | RLX | Harrison | 3 hr |
| Aug 12, 7:04 AM EDT | Flash Flood Warning | RLX | Lewis | 3 hr |
| Aug 12, 7:29 AM EDT | Flash Flood Warning | RLX | Roane | 3 hr |
| Aug 12, 7:51 AM EDT | Flash Flood Warning | RLX | Lewis | 2 hr |
| Aug 13, 3:59 PM EDT | Flash Flood Warning | PBZ | Marion | 3 hr |
| Aug 13, 5:34 PM EDT | Flash Flood Warning | RLX | Jackson | 87 min |
| Aug 18, 12:52 PM EDT | Flash Flood Warning | RLX | Doddridge, Ritchie | 3 hr |
| Aug 18, 1:26 PM EDT | Flash Flood Warning | RLX | Boone, Fayette, Kanawha | 6 hr |
| Aug 18, 4:06 PM EDT | Flash Flood Warning | RLX | Kanawha, Putnam | 2 hr |
| Aug 18, 4:18 PM EDT | Flash Flood Warning | RLX | Boone, Lincoln, Logan, Mingo, Wayne | 2 hr |
| Aug 19, 3:20 AM EDT | Flash Flood Warning | RLX | Mingo | 3 hr |
| Aug 30, 4:55 PM EDT | Flash Flood Warning | RNK | Mercer, Summers | 3 hr |
| Sep 1, 2:27 PM EDT | Flash Flood Warning | RLX | Kanawha | 2 hr |
| Sep 5, 5:34 PM EDT | Flash Flood Warning | RLX | Lincoln, Logan, Mingo, Wayne | 37 min |
| Sep 5, 5:35 PM EDT | Flash Flood Warning | RLX | Lincoln, Logan, Wayne | 35 min |
| Sep 6, 3:41 PM EDT | Flash Flood Warning | PBZ | Marion | 3 hr |
| Sep 6, 3:49 PM EDT | Flash Flood Warning | PBZ | Brooke, Ohio | 87 min |
| Sep 6, 4:02 PM EDT | Flash Flood Warning | RLX | Doddridge, Lewis | 99 min |
| Sep 6, 7:31 PM EDT | Flash Flood Warning | RLX | Wood | 86 min |
| Sep 7, 2:28 PM EDT | Flash Flood Warning | RLX | Fayette, Raleigh | 92 min |
| Sep 7, 8:02 PM EDT | Flash Flood Warning | RLX | Jackson, Mason | 93 min |
| Sep 8, 1:45 AM EDT | Flash Flood Warning | RNK | Greenbrier | 3 hr |
| Sep 9, 1:20 PM EDT | Flash Flood Warning | RLX | Cabell | 3 hr |
| Sep 9, 2:58 PM EDT | Flash Flood Warning | RLX | Cabell, Wayne | 3 hr |
| Sep 22, 9:18 PM EDT | Flash Flood Warning | RNK | Greenbrier, Monroe | 3 hr |
| Sep 25, 4:09 PM EDT | Flash Flood Warning | RLX | Braxton, Calhoun, Clay, Gilmer, Roane | 84 min |
| Oct 2, 6:11 PM EDT | Flash Flood Warning | RLX | Doddridge, Harrison | 3 hr |
| Oct 2, 6:26 PM EDT | Flash Flood Warning | RLX | Harrison | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kanawha County12
- Lewis County11
- Harrison County9
- Lincoln County8
- Randolph County8
- Doddridge County8
- Putnam County8
- Roane County7
- Wayne County7
- Mercer County6
- Braxton County6
- Calhoun County6
- Jackson County5
- Marion County4
- Upshur County4
- Tyler County4
- Ritchie County4
- Gilmer County4
- Wirt County4
- Cabell County4
- Tucker County4
- Mingo County4
- Barbour County4
- Summers County3
- Grant County3
- Hardy County3
- Pendleton County3
- Greenbrier County3
- Pocahontas County3
- Webster County3
- Pleasants County3
- Wood County3
- Hampshire County3
- Brooke County3
- Ohio County3
- Taylor County3
- Boone County3
- Logan County3
- Monongalia County2
- Monroe County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.