Alert archive / West Virginia / Grant County
Weather alerts in Grant County, West Virginia, 2020
116 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 116
- Warnings
- 33
- Watches
- 23
- Advisories
- 40
- Busiest month
- June15 alerts
- Busiest day
- July 22, 20205 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, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 11 | 35% | 4 | 75% | 17 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 27 | 6 | 78% | 15 | 47% | 9 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 456 | 314 | 31% | 1,047 | 79% | 23 min |
| NWS Baltimore/Washington: flash flood warnings | 66 | 34 | 48% | 130 | 90% | 72 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 4, 4:14 AM EST | Dense Fog Advisory | LWX | 7 hr |
| Jan 4, 2:11 PM EST | Winter Weather Advisory | LWX | 16 hr |
| Jan 6, 1:49 PM EST | Winter Weather Advisory | LWX | 29 hr |
| Jan 7, 8:49 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 8, 3:40 AM EST | Wind Advisory | LWX | 13 hr |
| Jan 11, 3:38 AM EST | High Wind Watch | LWX | 10 hr |
| Jan 11, 1:13 PM EST | Wind Advisory | LWX | 20 hr |
| Jan 15, 2:50 PM EST | Wind Advisory | LWX | 22 hr |
| Jan 17, 1:33 PM EST | Winter Weather Advisory | LWX | 29 hr |
| Feb 6, 6:29 PM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 26, 3:15 AM EST | Wind Advisory | LWX | 31 hr |
| Feb 26, 5:07 AM EST | Winter Weather Advisory | LWX | 26 hr |
| Feb 26, 2:49 PM EST | Mesoscale Discussion | SPC | 116 min |
| Mar 3, 1:22 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 3, 4:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 3, 10:28 PM EST | Severe Thunderstorm Warning | LWX | 30 min |
| Mar 5, 2:28 PM EST | Winter Weather Advisory | LWX | 32 hr |
| Mar 14, 1:30 PM EDT | Winter Weather Advisory | LWX | 22 hr |
| Apr 7, 2:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 8, 1:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 8, 2:14 AM EDT | Severe Thunderstorm Watch | SPC | 2 hr |
| Apr 8, 2:29 AM EDT | Severe Thunderstorm Warning | LWX | 61 min |
| Apr 8, 8:13 PM EDT | Wind Advisory | LWX | 23 hr |
| Apr 9, 2:03 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 9, 2:52 AM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Apr 9, 7:38 PM EDT | Wind Advisory | LWX | 22 hr |
| Apr 12, 4:47 AM EDT | High Wind Watch | LWX | 8 hr |
| Apr 12, 12:35 PM EDT | High Wind Warning | LWX | 26 hr |
| Apr 12, 12:35 PM EDT | Wind Advisory | LWX | 29 hr |
| Apr 21, 4:04 AM EDT | Freeze Warning | LWX | 27 hr |
| Apr 29, 4:24 AM EDT | Flood Watch | LWX | 39 hr |
| Apr 29, 5:08 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| May 6, 4:30 AM EDT | Freeze Warning | LWX | 29 hr |
| May 6, 2:13 PM EDT | Frost Advisory | LWX | 19 hr |
| May 7, 4:29 AM EDT | Freeze Watch | LWX | 10 hr |
| May 7, 2:16 PM EDT | Freeze Warning | LWX | 43 hr |
| May 8, 3:30 AM EDT | Freeze Watch | LWX | 24 hr |
| May 9, 3:36 AM EDT | Freeze Warning | LWX | 28 hr |
| May 11, 3:43 AM EDT | Frost Advisory | LWX | 26 hr |
| May 11, 3:43 AM EDT | Freeze Warning | LWX | 29 hr |
| May 12, 2:41 PM EDT | Frost Advisory | LWX | 18 hr |
| May 12, 2:41 PM EDT | Freeze Warning | LWX | 18 hr |
| May 23, 4:09 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Jun 3, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 4, 4:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 4, 7:03 PM EDT | Severe Thunderstorm Warning | LWX | 29 min |
| Jun 5, 3:40 AM EDT | Flash Flood Watch | LWX | 17 hr |
| Jun 6, 6:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 10, 3:37 PM EDT | Severe Thunderstorm Warning | LWX | 18 min |
| Jun 18, 2:20 PM EDT | Areal Flood Warning | LWX | 46 min |
| Jun 19, 12:37 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jun 20, 10:45 AM EDT | Flash Flood Watch | LWX | 10 hr |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 22, 3:11 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| Jun 23, 3:08 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Jun 23, 1:58 PM EDT | Flash Flood Watch | LWX | 10 hr |
| Jul 6, 3:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jul 8, 5:30 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Jul 10, 6:15 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Jul 10, 6:42 PM EDT | Severe Thunderstorm Warning | LWX | 33 min |
| Jul 18, 2:59 PM EDT | Heat Advisory | LWX | 29 hr |
| Jul 19, 2:47 PM EDT | Heat Advisory | LWX | 29 hr |
| Jul 21, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 12:07 AM EDT | Heat Advisory | LWX | 18 hr |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 22, 12:01 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 22, 12:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jul 22, 1:00 PM EDT | Severe Thunderstorm Warning | LWX | 34 min |
| Jul 30, 10:01 PM EDT | Flash Flood Watch | LWX | 20 hr |
| Aug 1, 3:35 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Aug 1, 4:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 1, 7:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 11, 3:19 PM EDT | Flash Flood Watch | LWX | 52 hr |
| Aug 13, 1:49 AM EDT | Flash Flood Watch | LWX | 19 hr |
| Aug 25, 3:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 25, 4:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 25, 5:26 PM EDT | Severe Thunderstorm Warning | LWX | 33 min |
| Aug 25, 7:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 27, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 6:22 PM EDT | Areal Flood Warning | LWX | 2 hr |
| Aug 30, 7:21 PM EDT | Flood Watch | LWX | 26 hr |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 19, 1:37 PM EDT | Frost Advisory | LWX | 20 hr |
| Sep 20, 1:43 PM EDT | Frost Advisory | LWX | 19 hr |
| Sep 20, 8:55 PM EDT | Freeze Warning | LWX | 5 hr |
| Sep 21, 1:31 PM EDT | Frost Advisory | LWX | 19 hr |
| Sep 26, 11:55 PM EDT | Dense Fog Advisory | LWX | 10 hr |
| Sep 27, 10:10 AM EDT | Dense Fog Advisory | LWX | 50 min |
| Oct 2, 12:48 PM EDT | Frost Advisory | LWX | 20 hr |
| Oct 15, 4:44 PM EDT | Freeze Watch | LWX | 22 hr |
| Oct 16, 2:39 PM EDT | Freeze Warning | LWX | 19 hr |
| Oct 31, 6:59 PM EDT | Wind Advisory | LWX | 44 hr |
| Nov 1, 2:29 AM EST | Winter Weather Advisory | LWX | 29 hr |
| Nov 14, 2:06 PM EST | Wind Advisory | LWX | 41 hr |
| Nov 15, 3:38 PM EST | Severe Thunderstorm Warning | LWX | 55 min |
| Nov 15, 4:58 PM EST | Severe Thunderstorm Warning | LWX | 47 min |
| Nov 29, 7:56 PM EST | Winter Weather Advisory | LWX | 24 hr |
| Nov 30, 4:20 AM EST | Winter Storm Warning | LWX | 47 hr |
| Dec 13, 3:52 AM EST | Winter Storm Watch | LWX | 11 hr |
| Dec 13, 2:25 PM EST | Winter Storm Warning | LWX | 23 hr |
| Dec 13, 2:25 PM EST | Winter Weather Advisory | LWX | 23 hr |
| Dec 14, 4:43 AM EST | Winter Storm Watch | LWX | 35 hr |
| Dec 15, 4:09 AM EST | Winter Storm Warning | LWX | 46 hr |
| Dec 16, 8:38 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 18, 5:27 AM EST | Dense Fog Advisory | LWX | 14 hr |
| Dec 21, 4:10 AM EST | Winter Weather Advisory | LWX | 28 hr |
| Dec 21, 4:21 AM EST | Dense Fog Advisory | LWX | 8 hr |
| Dec 21, 9:28 AM EST | Winter Storm Warning | LWX | 24 hr |
| Dec 23, 4:27 AM EST | Flash Flood Watch | LWX | 47 hr |
| Dec 23, 4:39 AM EST | Winter Storm Watch | LWX | 23 hr |
| Dec 24, 3:37 AM EST | Winter Storm Warning | LWX | 30 hr |
| Dec 25, 2:45 AM EST | Wind Chill Advisory | LWX | 30 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 | 17 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 20 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Watch | 8 |
| Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 8 |
| Freeze Watch | 3 |
| Frost Advisory | 7 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.