Alert archive / West Virginia / Grant County
Weather alerts in Grant County, West Virginia, 2009
117 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Grant County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 117
- Warnings
- 16
- Watches
- 25
- Advisories
- 57
- Busiest month
- February23 alerts
- Busiest day
- February 11, 20095 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Grant County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 2 | 50% | 2 | 100% | 41 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 13 | 1 | 92% | 8 | 13% | 2 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 216 | 113 | 48% | 277 | 86% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 43 | 18 | 58% | 56 | 80% | 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 5, 4:09 AM EST | Winter Storm Watch | LWX | 11 hr |
| Jan 5, 2:57 PM EST | Winter Weather Advisory | LWX | 45 hr |
| Jan 7, 2:55 PM EST | Winter Weather Advisory | LWX | 38 hr |
| Jan 7, 3:01 PM EST | Wind Advisory | LWX | 13 hr |
| Jan 10, 1:17 PM EST | Winter Weather Advisory | LWX | 15 hr |
| Jan 10, 9:18 PM EST | Winter Weather Advisory | LWX | 7 hr |
| Jan 11, 7:40 PM EST | Winter Weather Advisory | LWX | 14 hr |
| Jan 13, 10:42 AM EST | Winter Weather Advisory | LWX | 17 hr |
| Jan 14, 11:06 AM EST | Winter Weather Advisory | LWX | 28 hr |
| Jan 14, 2:54 PM EST | Wind Chill Advisory | LWX | 67 hr |
| Jan 18, 11:07 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 20, 2:45 PM EST | Wind Chill Advisory | LWX | 18 hr |
| Jan 26, 3:54 AM EST | Winter Storm Watch | LWX | 24 hr |
| Jan 26, 3:07 PM EST | Winter Weather Advisory | LWX | 45 hr |
| Jan 27, 3:45 AM EST | Winter Storm Warning | LWX | 36 hr |
| Jan 30, 3:46 AM EST | Winter Weather Advisory | LWX | 14 hr |
| Feb 2, 10:49 AM EST | Winter Weather Advisory | LWX | 17 hr |
| Feb 2, 3:12 PM EST | Winter Storm Watch | LWX | 13 hr |
| Feb 3, 4:11 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Feb 4, 12:35 AM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 4, 3:05 PM EST | Wind Chill Advisory | LWX | 18 hr |
| Feb 10, 3:52 PM EST | High Wind Watch | LWX | 24 hr |
| Feb 11, 3:40 PM EST | High Wind Warning | LWX | 28 hr |
| Feb 11, 3:40 PM EST | Wind Advisory | LWX | 32 hr |
| Feb 11, 3:42 PM EST | Winter Weather Advisory | LWX | 19 hr |
| 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, 7:22 PM EST | Severe Thunderstorm Warning | LWX | 53 min |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 11, 8:17 PM EST | Severe Thunderstorm Warning | LWX | 58 min |
| Feb 16, 12:10 PM EST | Winter Weather Advisory | LWX | 10 hr |
| Feb 17, 10:15 PM EST | Winter Weather Advisory | LWX | 14 hr |
| Feb 18, 1:05 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 18, 2:55 PM EST | Winter Storm Warning | LWX | 44 hr |
| Feb 18, 2:56 PM EST | Wind Advisory | LWX | 37 hr |
| Feb 19, 9:17 PM EST | Wind Chill Advisory | LWX | 12 hr |
| Feb 21, 2:47 AM EST | Winter Storm Watch | LWX | 13 hr |
| Feb 21, 3:26 PM EST | Winter Weather Advisory | LWX | 48 hr |
| Feb 22, 3:21 PM EST | Winter Storm Warning | LWX | 24 hr |
| Mar 2, 3:03 PM EST | Wind Chill Advisory | LWX | 18 hr |
| Mar 8, 3:04 PM EDT | Wind Advisory | LWX | 23 hr |
| Mar 29, 2:31 PM EDT | Wind Advisory | LWX | 20 hr |
| Apr 3, 4:32 AM EDT | Wind Advisory | LWX | 34 hr |
| Apr 6, 2:47 PM EDT | Winter Weather Advisory | LWX | 40 hr |
| Apr 21, 6:30 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 8:51 AM EDT | Flood Watch | LWX | 4 hr |
| May 5, 3:23 PM EDT | Flood Watch | LWX | 37 hr |
| May 8, 5:35 PM EDT | Flash Flood Watch | LWX | 7 hr |
| May 12, 3:08 PM EDT | Frost Advisory | LWX | 17 hr |
| May 15, 3:12 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| May 16, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 16, 3:27 PM EDT | Freeze Watch | LWX | 12 hr |
| May 17, 3:18 AM EDT | Frost Advisory | LWX | 30 hr |
| May 17, 3:18 AM EDT | Freeze Warning | LWX | 18 hr |
| May 18, 3:53 AM EDT | Freeze Warning | LWX | 28 hr |
| May 19, 3:04 PM EDT | Frost Advisory | LWX | 17 hr |
| May 28, 4:55 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jun 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 3, 7:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 4:28 AM EDT | Flood Watch | LWX | 38 hr |
| Jun 9, 1:18 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jun 9, 1:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 9, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 9, 4:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 10, 1:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 11, 3:58 AM EDT | Flash Flood Watch | LWX | 24 hr |
| Jun 11, 11:51 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 17, 9:23 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jun 17, 9:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 17, 9:56 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 19, 5:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 19, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 26, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 5:10 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Jul 21, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 21, 2:39 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jul 25, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 12, 12:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 30, 3:45 AM EDT | Frost Advisory | LWX | 29 hr |
| Oct 5, 3:13 PM EDT | Frost Advisory | LWX | 18 hr |
| Oct 6, 10:03 PM EDT | Wind Advisory | LWX | 20 hr |
| Oct 11, 2:47 PM EDT | Frost Advisory | LWX | 17 hr |
| Oct 13, 4:10 AM EDT | Frost Advisory | LWX | 28 hr |
| Oct 15, 3:31 PM EDT | Winter Weather Advisory | LWX | 18 hr |
| Oct 17, 9:41 PM EDT | Freeze Warning | LWX | 11 hr |
| Oct 18, 3:41 AM EDT | Freeze Watch | LWX | 11 hr |
| Oct 18, 2:58 PM EDT | Freeze Warning | LWX | 18 hr |
| Oct 24, 5:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Nov 14, 9:06 PM EST | Dense Fog Advisory | LWX | 12 hr |
| Nov 25, 3:17 PM EST | Winter Storm Watch | LWX | 24 hr |
| Nov 25, 7:20 PM EST | Dense Fog Advisory | LWX | 17 hr |
| Nov 26, 2:49 PM EST | Winter Weather Advisory | LWX | 30 hr |
| Dec 2, 4:00 AM EST | Wind Advisory | LWX | 18 hr |
| Dec 4, 2:17 PM EST | Winter Weather Advisory | LWX | 30 hr |
| Dec 4, 11:07 PM EST | Winter Storm Warning | LWX | 18 hr |
| Dec 7, 2:16 PM EST | Winter Storm Watch | LWX | 24 hr |
| Dec 8, 9:50 AM EST | Winter Storm Warning | LWX | 21 hr |
| Dec 8, 1:14 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 9, 4:02 AM EST | Wind Advisory | LWX | 17 hr |
| Dec 9, 2:07 PM EST | High Wind Warning | LWX | 5 hr |
| Dec 10, 3:47 AM EST | Wind Advisory | LWX | 7 hr |
| Dec 10, 3:00 PM EST | Wind Chill Advisory | LWX | 18 hr |
| Dec 12, 3:21 PM EST | Winter Weather Advisory | LWX | 23 hr |
| Dec 17, 1:48 PM EST | Winter Storm Watch | LWX | 14 hr |
| Dec 18, 4:05 AM EST | Winter Storm Warning | LWX | 47 hr |
| Dec 19, 12:34 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 19, 6:57 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 23, 2:46 PM EST | Winter Storm Watch | LWX | 24 hr |
| Dec 24, 2:29 PM EST | Winter Weather Advisory | LWX | 31 hr |
| Dec 25, 4:32 AM EST | Wind Advisory | LWX | 13 hr |
| Dec 25, 4:14 PM EST | Dense Fog Advisory | LWX | 4 hr |
| Dec 27, 1:12 AM EST | Dense Fog Advisory | LWX | 8 hr |
| Dec 27, 3:16 PM EST | Winter Weather Advisory | LWX | 39 hr |
| Dec 28, 2:48 PM EST | Wind Advisory | LWX | 23 hr |
| Dec 30, 1:58 PM EST | Winter Weather Advisory | LWX | 21 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 | 4 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 19 |
| Flooding | |
| Flash Flood Watch | 5 |
| Flood Watch | 3 |
| Winter | |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 8 |
| Winter Weather Advisory | 25 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Frost Advisory | 7 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 1 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
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.