Alert archive / West Virginia / Greenbrier County
Weather alerts in Greenbrier County, West Virginia, 2009
78 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Greenbrier County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 78
- Warnings
- 20
- Watches
- 4
- Advisories
- 0
- Busiest month
- June22 alerts
- Busiest day
- June 3, 200910 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Greenbrier County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 13 | 19% | 13 | 77% | 26 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 19 | 1 | 95% | 9 | 11% | 4 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 264 | 144 | 45% | 348 | 82% | 26 min |
| NWS Blacksburg, VA: flash flood warnings | 108 | 53 | 51% | 135 | 81% | 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 | Lasted |
|---|---|---|---|
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | 88 min |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 11, 6:39 PM EST | Severe Thunderstorm Warning | RNK | 81 min |
| Feb 11, 7:58 PM EST | Severe Thunderstorm Warning | RNK | 62 min |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 18, 1:05 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Apr 21, 1:24 PM EDT | Special Weather Statement | RNK | 66 min |
| May 6, 1:07 PM EDT | Special Weather Statement | RNK | 53 min |
| May 15, 8:52 PM EDT | Flash Flood Warning | RNK | 106 min |
| May 16, 1:54 PM EDT | Special Weather Statement | RNK | 51 min |
| May 16, 5:35 PM EDT | Special Weather Statement | RNK | 55 min |
| May 28, 12:17 PM EDT | Special Weather Statement | RNK | 58 min |
| May 28, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 28, 4:18 PM EDT | Special Weather Statement | RNK | 57 min |
| Jun 2, 8:54 PM EDT | Severe Thunderstorm Warning | RNK | 48 min |
| Jun 2, 9:31 PM EDT | Severe Thunderstorm Warning | RNK | 68 min |
| Jun 2, 10:06 PM EDT | Severe Thunderstorm Warning | RNK | 48 min |
| Jun 2, 10:37 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Jun 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 3, 3:10 PM EDT | Severe Thunderstorm Warning | RNK | 47 min |
| Jun 3, 3:19 PM EDT | Special Weather Statement | RNK | 56 min |
| Jun 3, 3:31 PM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| Jun 3, 4:05 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| Jun 3, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 9, 3:08 AM EDT | Special Weather Statement | RNK | 52 min |
| Jun 9, 4:04 AM EDT | Special Weather Statement | RNK | 56 min |
| Jun 9, 4:44 AM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 11, 9:51 AM EDT | Special Weather Statement | RNK | 54 min |
| Jun 11, 10:47 AM EDT | Special Weather Statement | RNK | 58 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 7:09 PM EDT | Special Weather Statement | RNK | 36 min |
| Jun 12, 2:23 PM EDT | Special Weather Statement | RNK | 37 min |
| Jun 16, 10:36 PM EDT | Special Weather Statement | RNK | 54 min |
| Jun 19, 11:27 AM EDT | Special Weather Statement | RNK | 63 min |
| Jun 19, 12:00 PM EDT | Special Weather Statement | RNK | 60 min |
| Jun 19, 12:16 PM EDT | Severe Thunderstorm Warning | RNK | 37 min |
| Jul 22, 7:47 PM EDT | Special Weather Statement | RNK | 43 min |
| Jul 25, 3:52 PM EDT | Special Weather Statement | RNK | 53 min |
| Jul 25, 4:38 PM EDT | Severe Thunderstorm Warning | RNK | 67 min |
| Jul 25, 6:40 PM EDT | Severe Thunderstorm Warning | RNK | 95 min |
| Jul 25, 7:21 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Jul 25, 7:49 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jul 25, 8:16 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Jul 26, 2:35 AM EDT | Special Weather Statement | RNK | 55 min |
| Jul 29, 6:26 PM EDT | Special Weather Statement | RNK | 64 min |
| Jul 31, 10:13 AM EDT | Special Weather Statement | RNK | 62 min |
| Aug 2, 8:19 AM EDT | Special Weather Statement | RNK | 56 min |
| Aug 2, 9:03 AM EDT | Special Weather Statement | RNK | 57 min |
| Aug 10, 3:32 PM EDT | Special Weather Statement | RNK | 58 min |
| Aug 11, 2:22 PM EDT | Special Weather Statement | RNK | 23 min |
| Aug 11, 2:45 PM EDT | Special Weather Statement | RNK | 45 min |
| Aug 11, 10:54 PM EDT | Special Weather Statement | RNK | 51 min |
| Aug 12, 12:47 AM EDT | Special Weather Statement | RNK | 88 min |
| Aug 15, 2:49 PM EDT | Special Weather Statement | RNK | 26 min |
| Aug 17, 1:14 PM EDT | Special Weather Statement | RNK | 61 min |
| Aug 18, 4:36 PM EDT | Special Weather Statement | RNK | 24 min |
| Aug 18, 5:01 PM EDT | Special Weather Statement | RNK | 29 min |
| Aug 19, 1:01 PM EDT | Special Weather Statement | RNK | 59 min |
| Aug 21, 3:20 PM EDT | Special Weather Statement | RNK | 55 min |
| Sep 6, 3:08 PM EDT | Special Weather Statement | RNK | 52 min |
| Sep 8, 7:48 PM EDT | Special Weather Statement | RNK | 57 min |
| Sep 28, 11:37 AM EDT | Special Weather Statement | RNK | 38 min |
| Oct 9, 5:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Oct 9, 7:49 PM EDT | Special Weather Statement | RNK | 86 min |
| Oct 9, 9:08 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Oct 24, 2:10 AM EDT | Special Weather Statement | RNK | 65 min |
| Oct 24, 3:14 AM EDT | Special Weather Statement | RNK | 61 min |
| Oct 24, 4:14 AM EDT | Special Weather Statement | RNK | 61 min |
| Oct 24, 5:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Nov 11, 9:36 PM EST | Special Weather Statement | RNK | 114 min |
| Dec 3, 12:16 AM EST | Special Weather Statement | RNK | 59 min |
| Dec 9, 4:36 AM EST | Areal Flood Warning | RNK | 6 hr |
| Dec 9, 11:27 AM EST | River Flood Warning | RNK | 23 hr |
| Dec 18, 7:22 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 19, 12:34 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 19, 6:57 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 24, 11:11 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 25, 6:31 AM EST | Mesoscale Discussion | SPC | 4 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 16 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 43 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| River Flood Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.