Alert archive / West Virginia / Flash Flood Warnings
Flash Flood Warnings in West Virginia, 2010
85 flash flood warnings in 2010. 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 2010. Tap one for its archive.
- Flash Flood Warnings
- 85
- Busiest month
- May31 flash flood warnings
- Busiest day
- June 13, 20107 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.
46 of 85 flash flood warnings covering West Virginia in 2010 had a flash flood report inside them; 99 of 115 flash flood reports fell inside a warning, on average 91 minutes after it went out.
West Virginia, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 85 | 46 | 46% | 115 | 86% | 91 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: flash flood warnings | 64 | 35 | 45% | 139 | 92% | 166 min |
| NWS Pittsburgh, PA: flash flood warnings | 24 | 15 | 38% | 29 | 90% | 73 min |
| NWS Blacksburg, VA: flash flood warnings | 111 | 62 | 44% | 205 | 90% | 130 min |
| NWS Charleston, WV: flash flood warnings | 58 | 30 | 48% | 120 | 86% | 100 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 |
|---|---|---|---|---|
| Jan 24, 10:35 PM EST | Flash Flood Warning | RNK | Greenbrier | 6 hr |
| Jan 24, 10:58 PM EST | Flash Flood Warning | LWX | Pendleton | 9 hr |
| Jan 25, 2:11 AM EST | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 6 hr |
| Mar 12, 9:36 PM EST | Flash Flood Warning | RNK | Mercer, Monroe, Summers | 6 hr |
| Mar 13, 1:38 AM EST | Flash Flood Warning | RNK | Mercer | 6 hr |
| Mar 13, 3:32 AM EST | Flash Flood Warning | RNK | Mercer, Monroe, Summers | 4 hr |
| Mar 13, 4:25 AM EST | Flash Flood Warning | RNK | Greenbrier | 9 hr |
| Mar 13, 7:34 AM EST | Flash Flood Warning | RNK | Mercer, Monroe, Summers | 6 hr |
| Mar 22, 8:09 PM EDT | Flash Flood Warning | LWX | Hampshire, Mineral | 99 min |
| Apr 25, 7:01 PM EDT | Flash Flood Warning | LWX | Berkeley, Jefferson | 3 hr |
| Apr 25, 7:53 PM EDT | Flash Flood Warning | LWX | Berkeley, Hampshire, Jefferson | 3 hr |
| May 12, 12:00 PM EDT | Flash Flood Warning | RLX | Cabell, Wayne | 3 hr |
| May 12, 1:23 PM EDT | Flash Flood Warning | RLX | Pocahontas, Randolph, Webster | 4 hr |
| May 12, 6:56 PM EDT | Flash Flood Warning | RLX | Kanawha, Putnam | 85 min |
| May 12, 7:33 PM EDT | Flash Flood Warning | RLX | Boone, Kanawha | 117 min |
| May 12, 8:08 PM EDT | Flash Flood Warning | RLX | Boone, Fayette, Kanawha, Raleigh | 112 min |
| May 14, 6:34 PM EDT | Flash Flood Warning | RLX | Boone | 116 min |
| May 16, 5:55 PM EDT | Flash Flood Warning | RNK | Greenbrier, Summers | 6 hr |
| May 16, 6:09 PM EDT | Flash Flood Warning | RLX | Fayette | 4 hr |
| May 16, 6:30 PM EDT | Flash Flood Warning | RLX | Pocahontas, Randolph | 4 hr |
| May 16, 7:18 PM EDT | Flash Flood Warning | RLX | Raleigh | 2 hr |
| May 17, 3:30 PM EDT | Flash Flood Warning | RLX | Wyoming | 60 min |
| May 17, 5:16 PM EDT | Flash Flood Warning | RLX | Jackson, Kanawha, Putnam, Roane | 59 min |
| May 17, 6:09 PM EDT | Flash Flood Warning | RLX | Boone, Clay, Jackson, Kanawha, Lincoln, Logan and 2 more | 111 min |
| May 17, 6:27 PM EDT | Flash Flood Warning | RLX | Boone, Logan, Mingo | 2 hr |
| May 17, 8:49 PM EDT | Flash Flood Warning | RLX | McDowell, Wyoming | 116 min |
| May 18, 2:21 AM EDT | Flash Flood Warning | RLX | Logan, Mingo | 84 min |
| May 18, 3:03 AM EDT | Flash Flood Warning | RLX | Logan | 87 min |
| May 18, 5:49 AM EDT | Flash Flood Warning | RLX | Pleasants, Ritchie | 116 min |
| May 18, 3:46 PM EDT | Flash Flood Warning | RLX | Ritchie, Wirt | 89 min |
| May 18, 4:47 PM EDT | Flash Flood Warning | RLX | Pleasants, Wood | 88 min |
| May 27, 11:54 AM EDT | Flash Flood Warning | RNK | Greenbrier | 6 hr |
| May 27, 12:07 PM EDT | Flash Flood Warning | RLX | Pocahontas | 4 hr |
| May 27, 12:49 PM EDT | Flash Flood Warning | RNK | Greenbrier | 119 min |
| May 27, 4:14 PM EDT | Flash Flood Warning | LWX | Pendleton | 2 hr |
| May 27, 5:51 PM EDT | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 2 hr |
| May 28, 3:58 PM EDT | Flash Flood Warning | LWX | Mineral | 2 hr |
| May 28, 4:39 PM EDT | Flash Flood Warning | LWX | Grant, Hardy | 2 hr |
| May 28, 5:01 PM EDT | Flash Flood Warning | LWX | Grant, Hampshire, Hardy, Mineral | 67 min |
| May 31, 11:46 AM EDT | Flash Flood Warning | RNK | Summers | 6 hr |
| May 31, 1:10 PM EDT | Flash Flood Warning | LWX | Grant, Mineral | 3 hr |
| May 31, 5:48 PM EDT | Flash Flood Warning | LWX | Grant, Hardy, Pendleton | 117 min |
| Jun 4, 5:12 PM EDT | Flash Flood Warning | RNK | Mercer | 5 hr |
| Jun 5, 4:39 PM EDT | Flash Flood Warning | PBZ | Marshall | 3 hr |
| Jun 12, 4:59 PM EDT | Flash Flood Warning | RLX | Logan, Mingo | 5 hr |
| Jun 12, 5:28 PM EDT | Flash Flood Warning | RLX | Wyoming | 2 hr |
| Jun 12, 10:29 PM EDT | Flash Flood Warning | RLX | Logan, Mingo, Wyoming | 5 hr |
| Jun 12, 10:58 PM EDT | Flash Flood Warning | RLX | McDowell, Wyoming | 5 hr |
| Jun 12, 11:08 PM EDT | Flash Flood Warning | RNK | Mercer | 6 hr |
| Jun 12, 11:34 PM EDT | Flash Flood Warning | RLX | Logan, McDowell, Mingo | 3 hr |
| Jun 13, 4:00 AM EDT | Flash Flood Warning | RLX | McDowell, Wyoming | 3 hr |
| Jun 13, 4:01 AM EDT | Flash Flood Warning | RLX | McDowell, Wyoming | 3 hr |
| Jun 13, 4:58 AM EDT | Flash Flood Warning | RNK | Mercer | 6 hr |
| Jun 21, 5:09 PM EDT | Flash Flood Warning | RLX | Boone | 111 min |
| Jul 9, 6:15 PM EDT | Flash Flood Warning | PBZ | Monongalia | 3 hr |
| Jul 13, 12:24 AM EDT | Flash Flood Warning | RLX | Pleasants, Tyler | 111 min |
| Jul 13, 11:29 AM EDT | Flash Flood Warning | RLX | Boone, Clay, Jackson, Kanawha, Lincoln, Putnam and 1 more | 2 hr |
| Jul 13, 2:04 PM EDT | Flash Flood Warning | RLX | Pleasants, Ritchie, Tyler, Wood | 3 hr |
| Jul 13, 5:36 PM EDT | Flash Flood Warning | PBZ | Monongalia | 6 hr |
| Jul 13, 9:31 PM EDT | Flash Flood Warning | PBZ | Marshall, Ohio | 3 hr |
| Jul 17, 11:46 AM EDT | Flash Flood Warning | RNK | Mercer | 3 hr |
| Jul 18, 2:16 PM EDT | Flash Flood Warning | RLX | Kanawha, Roane | 80 min |
| Jul 20, 3:33 PM EDT | Flash Flood Warning | RLX | Braxton | 54 min |
| Jul 20, 3:43 PM EDT | Flash Flood Warning | RLX | Braxton, Clay, Kanawha, Nicholas, Roane | 92 min |
| Jul 20, 10:06 PM EDT | Flash Flood Warning | RLX | Boone, Cabell, Kanawha, Lincoln, Logan, Mason and 2 more | 8 hr |
| Jul 21, 12:02 AM EDT | Flash Flood Warning | RLX | Cabell, Mason, Putnam | 6 hr |
| Jul 21, 2:31 AM EDT | Flash Flood Warning | RLX | Boone, Clay, Fayette, Kanawha, Nicholas, Raleigh and 2 more | 6 hr |
| Jul 21, 3:11 AM EDT | Flash Flood Warning | RLX | Wayne | 3 hr |
| Jul 25, 6:15 PM EDT | Flash Flood Warning | RLX | Boone, Lincoln, Wayne | 2 hr |
| Jul 27, 10:34 AM EDT | Flash Flood Warning | RLX | McDowell | 2 hr |
| Jul 27, 6:32 PM EDT | Flash Flood Warning | LWX | Pendleton | 65 min |
| Aug 3, 8:23 PM EDT | Flash Flood Warning | RLX | Tyler | 90 min |
| Aug 11, 4:39 PM EDT | Flash Flood Warning | RLX | Cabell, Wayne | 111 min |
| Aug 11, 5:39 PM EDT | Flash Flood Warning | RLX | Cabell, Lincoln, Wayne | 3 hr |
| Aug 11, 7:25 PM EDT | Flash Flood Warning | RNK | Mercer, Monroe, Summers | 3 hr |
| Aug 11, 7:39 PM EDT | Flash Flood Warning | RLX | Boone, Logan, Raleigh, Wyoming | 108 min |
| Aug 14, 7:04 PM EDT | Flash Flood Warning | RLX | Doddridge, Ritchie | 3 hr |
| Aug 14, 9:49 PM EDT | Flash Flood Warning | RLX | Doddridge, Ritchie | 2 hr |
| Aug 18, 12:52 PM EDT | Flash Flood Warning | RNK | Mercer | 4 hr |
| Sep 30, 10:29 AM EDT | Flash Flood Warning | LWX | Jefferson | 4 hr |
| Sep 30, 10:56 PM EDT | Flash Flood Warning | LWX | Jefferson | 4 hr |
| Nov 30, 11:08 PM EST | Flash Flood Warning | RNK | Mercer | 5 hr |
| Dec 1, 2:05 AM EST | Flash Flood Warning | LWX | Grant, Pendleton | 8 hr |
| Dec 1, 4:18 AM EST | Flash Flood Warning | LWX | Hampshire, Hardy, Mineral, Morgan | 6 hr |
| Dec 1, 4:29 AM EST | Flash Flood Warning | LWX | Berkeley, Jefferson, Morgan | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mercer County11
- Boone County11
- Kanawha County10
- Logan County9
- Wyoming County8
- Pendleton County7
- Grant County7
- Hardy County6
- Summers County6
- Wayne County6
- Putnam County6
- Roane County6
- McDowell County6
- Greenbrier County5
- Mineral County5
- Jefferson County5
- Cabell County5
- Lincoln County5
- Mingo County5
- Ritchie County5
- Monroe County4
- Hampshire County4
- Raleigh County4
- Clay County4
- Pleasants County4
- Berkeley County3
- Pocahontas County3
- Fayette County3
- Jackson County3
- Tyler County3
- Randolph County2
- Webster County2
- Wood County2
- Marshall County2
- Monongalia County2
- Braxton County2
- Nicholas County2
- Mason County2
- Doddridge County2
- Morgan County2
2 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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.