Alert archive / West Virginia / Mercer County
Weather alerts in Mercer County, West Virginia, 2012
168 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mercer County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 168
- Warnings
- 39
- Watches
- 26
- Advisories
- 40
- Busiest month
- July30 alerts
- Busiest day
- April 26, 20127 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mercer County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 14 | 33% | 20 | 100% | 26 min |
| Flash flood warnings | 5 | 2 | 60% | 3 | 100% | 30 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 17 | 0 | 100% | 0 | ||
| NWS Blacksburg, VA: severe thunderstorm warnings | 359 | 271 | 25% | 793 | 83% | 23 min |
| NWS Blacksburg, VA: flash flood warnings | 50 | 27 | 46% | 60 | 77% | 56 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 |
|---|---|---|---|
| Jan 1, 3:37 PM EST | Winter Weather Advisory | RNK | 50 hr |
| Jan 11, 11:12 AM EST | Wind Advisory | RNK | 7 hr |
| Jan 12, 4:13 AM EST | Winter Weather Advisory | RNK | 34 hr |
| Jan 14, 2:19 PM EST | Winter Weather Advisory | RNK | 17 hr |
| Jan 17, 11:50 AM EST | Wind Advisory | RNK | 7 hr |
| Jan 22, 4:23 AM EST | Dense Fog Advisory | RNK | 7 hr |
| Jan 23, 8:57 AM EST | Wind Advisory | RNK | 9 hr |
| Jan 27, 1:25 AM EST | Special Weather Statement | RNK | 80 min |
| Jan 27, 2:34 AM EST | Mesoscale Discussion | SPC | 86 min |
| Jan 27, 2:45 AM EST | Severe Thunderstorm Warning | RNK | 45 min |
| Jan 29, 3:34 AM EST | Wind Advisory | RNK | 21 hr |
| Feb 10, 9:47 AM EST | Winter Weather Advisory | RNK | 44 hr |
| Feb 11, 3:51 PM EST | Wind Chill Advisory | RNK | 18 hr |
| Feb 17, 3:11 PM EST | Winter Storm Watch | RNK | 25 hr |
| Feb 18, 4:36 PM EST | Winter Storm Warning | RNK | 34 hr |
| Feb 19, 12:47 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 7:04 PM EST | Special Weather Statement | RNK | 56 min |
| Feb 22, 9:19 PM EST | Areal Flood Advisory | RNK | 3 hr |
| Feb 23, 2:26 PM EST | Wind Advisory | RNK | 34 hr |
| Feb 24, 9:05 AM EST | Mesoscale Discussion | SPC | 25 min |
| Feb 24, 11:36 AM EST | Severe Thunderstorm Warning | RNK | 32 min |
| Feb 24, 12:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 24, 3:24 PM EST | Mesoscale Discussion | SPC | 66 min |
| Feb 25, 12:00 AM EST | Wind Advisory | RNK | 18 hr |
| Feb 29, 3:23 PM EST | Mesoscale Discussion | SPC | 67 min |
| Feb 29, 3:43 PM EST | Tornado Watch | SPC | 5 hr |
| Feb 29, 4:34 PM EST | Areal Flood Advisory | RNK | 3 hr |
| Feb 29, 6:06 PM EST | Special Weather Statement | RNK | 24 min |
| Feb 29, 6:15 PM EST | Severe Thunderstorm Warning | RNK | 26 min |
| Feb 29, 7:01 PM EST | Flash Flood Warning | RNK | 6 hr |
| Mar 2, 10:18 AM EST | Flash Flood Watch | RNK | 20 hr |
| Mar 2, 11:49 AM EST | Severe Thunderstorm Warning | RNK | 26 min |
| Mar 4, 2:22 PM EST | Winter Weather Advisory | RNK | 22 hr |
| Mar 15, 12:07 PM EDT | Special Weather Statement | RNK | 53 min |
| Mar 17, 4:14 PM EDT | Areal Flood Advisory | RNK | 2 hr |
| Mar 21, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Mar 24, 12:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Mar 24, 2:30 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Mar 24, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Mar 24, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 24, 6:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Mar 28, 2:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 28, 4:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Mar 28, 10:32 PM EDT | Special Weather Statement | RNK | 28 min |
| Apr 3, 6:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Apr 4, 4:02 AM EDT | Flash Flood Watch | RNK | 17 hr |
| Apr 4, 1:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 4, 3:54 PM EDT | Special Weather Statement | RNK | 66 min |
| Apr 6, 3:37 AM EDT | Freeze Warning | RNK | 30 hr |
| Apr 7, 2:53 PM EDT | Frost Advisory | RNK | 18 hr |
| Apr 8, 7:09 PM EDT | Fire Weather Watch | RNK | 16 hr |
| Apr 8, 7:09 PM EDT | Red Flag Warning | RNK | 25 hr |
| Apr 9, 3:35 PM EDT | Freeze Watch | RNK | 11 hr |
| Apr 9, 8:51 PM EDT | Red Flag Warning | RNK | 23 hr |
| Apr 10, 3:03 AM EDT | Freeze Warning | RNK | 30 hr |
| Apr 10, 3:52 PM EDT | Freeze Watch | RNK | 23 hr |
| Apr 11, 3:13 PM EDT | Freeze Warning | RNK | 18 hr |
| Apr 11, 3:25 PM EDT | Freeze Watch | RNK | 24 hr |
| Apr 12, 3:23 PM EDT | Frost Advisory | RNK | 5 hr |
| Apr 12, 3:23 PM EDT | Freeze Warning | RNK | 18 hr |
| Apr 23, 5:29 AM EDT | Freeze Warning | RNK | 26 hr |
| Apr 26, 4:31 AM EDT | Special Weather Statement | RNK | 29 min |
| Apr 26, 11:54 AM EDT | Areal Flood Advisory | RNK | 3 hr |
| Apr 26, 2:53 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Apr 26, 6:16 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Apr 26, 6:34 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Apr 26, 7:00 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Apr 26, 7:10 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Apr 27, 12:31 AM EDT | Areal Flood Warning | RNK | 18 hr |
| Apr 27, 6:44 AM EDT | Areal Flood Advisory | RNK | 3 hr |
| Apr 27, 9:32 AM EDT | Areal Flood Advisory | RNK | 3 hr |
| Apr 28, 9:55 AM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| Apr 28, 3:49 PM EDT | Flash Flood Watch | RNK | 12 hr |
| May 1, 2:58 AM EDT | Special Weather Statement | RNK | 62 min |
| May 1, 3:01 AM EDT | Special Weather Statement | RNK | 59 min |
| May 1, 5:13 PM EDT | Special Weather Statement | RNK | 62 min |
| May 3, 4:10 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| May 3, 4:36 PM EDT | Severe Thunderstorm Warning | RNK | 39 min |
| May 6, 7:33 PM EDT | Special Weather Statement | RNK | 27 min |
| May 9, 10:16 PM EDT | Special Weather Statement | RNK | 44 min |
| May 13, 4:14 AM EDT | Flash Flood Watch | RNK | 34 hr |
| May 16, 3:17 AM EDT | Dense Fog Advisory | RNK | 7 hr |
| May 22, 3:27 AM EDT | Flash Flood Watch | RNK | 18 hr |
| May 22, 3:50 PM EDT | Special Weather Statement | RNK | 55 min |
| May 22, 4:33 PM EDT | Areal Flood Advisory | RNK | 117 min |
| May 22, 4:51 PM EDT | Flash Flood Warning | RNK | 3 hr |
| Jun 1, 1:18 PM EDT | Special Weather Statement | RNK | 117 min |
| Jun 1, 1:28 PM EDT | Tornado Watch | SPC | 8 hr |
| Jun 21, 7:42 PM EDT | Severe Thunderstorm Warning | RNK | 27 min |
| Jun 24, 2:28 PM EDT | Special Weather Statement | RNK | 47 min |
| Jun 29, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 29, 6:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 7:01 PM EDT | Special Weather Statement | RNK | 44 min |
| Jun 29, 7:49 PM EDT | Severe Thunderstorm Warning | RNK | 71 min |
| Jun 29, 7:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 29, 8:26 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Jun 29, 8:47 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jun 30, 4:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 7:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 9:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 1, 9:44 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 8:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 1, 9:06 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 10:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 1, 10:43 PM EDT | Special Weather Statement | RNK | 62 min |
| Jul 1, 10:53 PM EDT | Severe Thunderstorm Warning | RNK | 67 min |
| Jul 1, 11:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 3, 6:39 PM EDT | Severe Thunderstorm Warning | RNK | 31 min |
| Jul 3, 6:53 PM EDT | Severe Thunderstorm Warning | RNK | 45 min |
| Jul 3, 7:22 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 3, 7:39 PM EDT | Special Weather Statement | RNK | 36 min |
| Jul 5, 11:14 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 5, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 12:58 PM EDT | Severe Thunderstorm Warning | RNK | 92 min |
| Jul 5, 2:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 4:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 9, 3:19 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 18, 3:05 PM EDT | Special Weather Statement | RNK | 40 min |
| Jul 18, 3:23 PM EDT | Severe Thunderstorm Warning | RNK | 28 min |
| Jul 19, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 4:48 PM EDT | Special Weather Statement | RNK | 57 min |
| Jul 19, 7:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 21, 1:47 AM EDT | Special Weather Statement | RNK | 58 min |
| Jul 24, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 1:50 PM EDT | Flash Flood Watch | RNK | 3 hr |
| Jul 27, 1:05 PM EDT | Special Weather Statement | RNK | 55 min |
| Jul 27, 1:35 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| Jul 31, 4:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Aug 1, 8:44 PM EDT | Special Weather Statement | RNK | 61 min |
| Aug 1, 10:02 PM EDT | Flash Flood Warning | RNK | 94 min |
| Aug 3, 5:58 PM EDT | Special Weather Statement | RNK | 47 min |
| Aug 5, 6:16 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| Aug 10, 12:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 10, 4:31 PM EDT | Special Weather Statement | RNK | 29 min |
| Aug 24, 4:01 PM EDT | Special Weather Statement | RNK | 59 min |
| Sep 7, 5:08 AM EDT | Dense Fog Advisory | RNK | 4 hr |
| Sep 7, 5:40 PM EDT | Special Weather Statement | RNK | 50 min |
| Sep 8, 1:00 PM EDT | Special Weather Statement | RNK | 60 min |
| Sep 8, 1:37 PM EDT | Special Weather Statement | RNK | 53 min |
| Sep 17, 5:15 AM EDT | Flash Flood Watch | RNK | 34 hr |
| Sep 18, 7:04 AM EDT | Special Weather Statement | RNK | 41 min |
| Sep 18, 7:39 AM EDT | Special Weather Statement | RNK | 51 min |
| Sep 23, 1:58 PM EDT | Frost Advisory | RNK | 19 hr |
| Oct 1, 1:26 PM EDT | Special Weather Statement | RNK | 64 min |
| Oct 10, 4:15 AM EDT | Freeze Warning | RNK | 29 hr |
| Oct 16, 3:42 PM EDT | Frost Advisory | RNK | 17 hr |
| Oct 18, 2:24 AM EDT | Wind Advisory | RNK | 9 hr |
| Oct 18, 4:40 PM EDT | Special Weather Statement | RNK | 50 min |
| Oct 18, 5:22 PM EDT | Special Weather Statement | RNK | 53 min |
| Oct 20, 3:13 PM EDT | Frost Advisory | RNK | 18 hr |
| Oct 21, 4:00 PM EDT | Frost Advisory | RNK | 17 hr |
| Oct 27, 4:20 PM EDT | Winter Storm Watch | RNK | 25 hr |
| Oct 28, 5:10 PM EDT | Wind Advisory | RNK | 42 hr |
| Oct 28, 5:33 PM EDT | Winter Storm Warning | RNK | 59 hr |
| Oct 29, 2:51 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Oct 30, 1:02 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 31, 4:16 AM EDT | Winter Weather Advisory | RNK | 11 hr |
| Oct 31, 3:17 PM EDT | Winter Weather Advisory | RNK | 19 hr |
| Nov 12, 5:22 AM EST | Wind Advisory | RNK | 6 hr |
| Dec 17, 8:31 PM EST | Special Weather Statement | RNK | 44 min |
| Dec 18, 3:38 PM EST | Winter Storm Watch | RNK | 37 hr |
| Dec 19, 3:08 PM EST | Wind Advisory | RNK | 27 hr |
| Dec 20, 4:55 AM EST | Winter Storm Warning | RNK | 56 hr |
| Dec 25, 3:02 PM EST | Wind Advisory | RNK | 22 hr |
| Dec 26, 3:23 AM EST | High Wind Warning | RNK | 10 hr |
| Dec 26, 3:48 PM EST | Wind Advisory | RNK | 21 hr |
| Dec 28, 4:16 AM EST | Winter Weather Advisory | RNK | 56 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 | 21 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 37 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 12 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.