Alert archive / West Virginia / Jefferson County
Weather alerts in Jefferson County, West Virginia, 2019
171 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 171
- Warnings
- 64
- Watches
- 32
- Advisories
- 34
- Busiest month
- May30 alerts
- Busiest day
- May 3, 20196 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Jefferson County in 2019 had a tornado report inside them.
Jefferson County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 36 | 24 | 33% | 17 | 100% | 18 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 34 | 4 | 88% | 8 | 50% | 5 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 694 | 468 | 33% | 1,610 | 81% | 19 min |
| NWS Baltimore/Washington: flash flood warnings | 36 | 16 | 56% | 74 | 96% | 103 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 9, 10:32 PM EST | Snow Squall Warning | LWX | 28 min |
| Jan 10, 2:25 AM EST | Wind Advisory | LWX | 11 hr |
| Jan 11, 2:17 PM EST | Winter Storm Warning | LWX | 56 hr |
| Jan 11, 2:17 PM EST | Winter Weather Advisory | LWX | 56 hr |
| Jan 13, 9:47 PM EST | Winter Weather Advisory | LWX | 20 hr |
| Jan 17, 3:41 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Jan 18, 8:31 AM EST | Dense Fog Advisory | LWX | 3 hr |
| Jan 18, 1:27 PM EST | Winter Storm Warning | LWX | 41 hr |
| Jan 18, 1:27 PM EST | Winter Weather Advisory | LWX | 41 hr |
| Jan 19, 1:44 PM EST | Wind Advisory | LWX | 29 hr |
| Jan 20, 3:44 AM EST | Wind Chill Advisory | LWX | 31 hr |
| Jan 20, 8:55 AM EST | River Flood Warning | LWX | 16 hr |
| Jan 23, 8:13 AM EST | River Flood Watch | LWX | 6 hr |
| Jan 23, 1:56 PM EST | River Flood Warning | LWX | 36 hr |
| Jan 23, 10:22 PM EST | River Flood Watch | LWX | 11 hr |
| Jan 25, 9:22 AM EST | Special Weather Statement | LWX | 53 min |
| Jan 28, 2:58 PM EST | Winter Weather Advisory | LWX | 29 hr |
| Jan 29, 3:20 AM EST | Wind Chill Advisory | LWX | 57 hr |
| Jan 29, 9:00 PM EST | Wind Advisory | LWX | 20 hr |
| Jan 30, 10:13 AM EST | Snow Squall Warning | LWX | 62 min |
| Jan 30, 11:13 AM EST | Snow Squall Warning | LWX | 92 min |
| Jan 31, 3:27 PM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 10, 3:02 AM EST | Winter Weather Advisory | LWX | 61 hr |
| Feb 12, 4:16 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 3:23 PM EST | River Flood Warning | LWX | 22 hr |
| Feb 16, 2:54 PM EST | Winter Weather Advisory | LWX | 34 hr |
| Feb 18, 3:38 AM EST | Winter Storm Watch | LWX | 23 hr |
| Feb 19, 2:47 AM EST | Winter Storm Warning | LWX | 46 hr |
| Feb 20, 5:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 20, 6:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 23, 3:20 AM EST | River Flood Watch | LWX | 30 hr |
| Feb 23, 3:01 PM EST | High Wind Warning | LWX | 44 hr |
| Feb 23, 3:01 PM EST | Wind Advisory | LWX | 44 hr |
| Feb 24, 3:02 AM EST | Wind Advisory | LWX | 38 hr |
| Feb 24, 9:26 AM EST | River Flood Warning | LWX | 16 hr |
| Feb 24, 9:33 AM EST | River Flood Watch | LWX | 25 hr |
| Feb 28, 9:28 AM EST | Winter Weather Advisory | LWX | 24 hr |
| Mar 1, 9:43 AM EST | Winter Weather Advisory | LWX | 19 hr |
| Mar 1, 1:55 PM EST | Winter Storm Watch | LWX | 24 hr |
| Mar 2, 1:55 PM EST | Winter Storm Warning | LWX | 35 hr |
| Mar 20, 8:53 PM EDT | Flood Watch | LWX | 26 hr |
| Mar 21, 11:24 AM EDT | River Flood Watch | LWX | 5 hr |
| Mar 21, 4:15 PM EDT | River Flood Warning | LWX | 30 hr |
| Mar 21, 5:58 PM EDT | Areal Flood Warning | LWX | 12 hr |
| Mar 22, 4:08 AM EDT | Wind Advisory | LWX | 24 hr |
| Apr 3, 3:56 AM EDT | Red Flag Warning | LWX | 16 hr |
| Apr 14, 6:08 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 15, 3:51 AM EDT | Wind Advisory | LWX | 16 hr |
| Apr 18, 2:07 PM EDT | Flash Flood Watch | LWX | 32 hr |
| Apr 19, 12:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 12:48 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 4:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Apr 19, 8:06 PM EDT | Tornado Warning | LWX | 24 min |
| Apr 20, 1:12 AM EDT | Areal Flood Warning | LWX | 5 hr |
| Apr 20, 3:03 AM EDT | River Flood Warning | LWX | 20 hr |
| Apr 26, 11:37 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 26, 5:39 PM EDT | Wind Advisory | LWX | 19 hr |
| Apr 28, 1:15 PM EDT | Frost Advisory | LWX | 19 hr |
| May 2, 4:30 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| May 3, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 3, 4:09 PM EDT | Flash Flood Watch | LWX | 5 hr |
| May 3, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 3, 6:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 3, 7:27 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| May 3, 7:55 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| May 3, 8:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| May 3, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| May 3, 8:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 3, 8:43 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| May 4, 4:05 AM EDT | Flash Flood Watch | LWX | 30 hr |
| May 4, 7:26 AM EDT | River Flood Warning | LWX | 4 hr |
| May 5, 6:47 AM EDT | Areal Flood Warning | LWX | 18 hr |
| May 5, 10:56 AM EDT | River Flood Watch | LWX | 27 min |
| May 5, 11:21 AM EDT | River Flood Warning | LWX | 33 hr |
| May 19, 1:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 19, 4:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 23, 11:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 23, 1:02 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 23, 2:26 PM EDT | Severe Thunderstorm Warning | LWX | 34 min |
| May 26, 11:14 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 5:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 8:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 30, 12:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 1:45 PM EDT | Severe Thunderstorm Warning | LWX | 29 min |
| May 30, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 30, 2:20 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jun 2, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 1:49 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jun 2, 2:08 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jun 2, 2:30 PM EDT | Severe Thunderstorm Warning | LWX | 21 min |
| Jun 2, 3:01 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Jun 2, 3:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 13, 3:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 13, 4:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Jun 16, 1:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 17, 3:57 AM EDT | Flash Flood Watch | LWX | 15 hr |
| Jun 17, 2:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 20, 1:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 4:12 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 27, 4:23 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jun 27, 4:37 PM EDT | Severe Thunderstorm Warning | LWX | 53 min |
| Jun 27, 5:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 28, 5:42 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 29, 2:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 29, 5:15 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Jun 29, 9:18 PM EDT | Severe Thunderstorm Warning | LWX | 57 min |
| Jun 29, 9:57 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jul 2, 5:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 5:20 PM EDT | Severe Thunderstorm Warning | LWX | 27 min |
| Jul 7, 4:06 AM EDT | Flash Flood Watch | LWX | 34 hr |
| Jul 7, 11:24 PM EDT | Areal Flood Warning | LWX | 12 hr |
| Jul 8, 12:42 AM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 8, 12:48 AM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jul 8, 2:22 AM EDT | Areal Flood Warning | LWX | 6 hr |
| Jul 11, 4:18 AM EDT | Flash Flood Watch | LWX | 15 hr |
| Jul 11, 12:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 8:57 PM EDT | Excessive Heat Watch | LWX | 6 hr |
| Jul 17, 8:57 PM EDT | Excessive Heat Watch | LWX | 19 hr |
| Jul 18, 11:09 AM EDT | Excessive Heat Watch | LWX | 28 hr |
| Jul 18, 11:09 AM EDT | Excessive Heat Watch | LWX | 58 hr |
| Jul 18, 1:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:43 PM EDT | Heat Advisory | LWX | 29 hr |
| Jul 19, 3:52 AM EDT | Excessive Heat Warning | LWX | 17 hr |
| Jul 19, 3:05 PM EDT | Excessive Heat Warning | LWX | 30 hr |
| Jul 20, 7:53 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 20, 8:49 PM EDT | Excessive Heat Warning | LWX | 24 hr |
| Jul 21, 2:48 PM EDT | Flash Flood Watch | LWX | 37 hr |
| Jul 21, 6:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 21, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 22, 1:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 2:10 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Jul 22, 2:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jul 22, 8:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 30, 4:17 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 6, 7:19 PM EDT | Severe Thunderstorm Warning | LWX | 24 min |
| Aug 13, 8:25 PM EDT | Severe Thunderstorm Warning | LWX | 20 min |
| Aug 15, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 2:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 20, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 22, 6:38 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Sep 2, 2:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Sep 2, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Sep 11, 2:53 PM EDT | Severe Thunderstorm Warning | LWX | 20 min |
| Sep 11, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Sep 11, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Sep 12, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 16, 3:51 AM EDT | Wind Advisory | LWX | 34 hr |
| Oct 17, 6:59 PM EDT | Freeze Watch | LWX | 8 hr |
| Oct 18, 3:15 AM EDT | Freeze Warning | LWX | 30 hr |
| Oct 22, 11:46 PM EDT | Dense Fog Advisory | LWX | 6 hr |
| Oct 31, 3:48 AM EDT | Wind Advisory | LWX | 24 hr |
| Oct 31, 1:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 31, 2:56 PM EDT | Tornado Watch | SPC | 10 hr |
| Oct 31, 4:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Oct 31, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Oct 31, 7:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 26, 2:47 PM EST | Wind Advisory | LWX | 45 hr |
| Dec 10, 2:28 PM EST | Winter Weather Advisory | LWX | 15 hr |
| Dec 12, 1:51 PM EST | Winter Weather Advisory | LWX | 28 hr |
| Dec 13, 4:59 PM EST | Dense Fog Advisory | LWX | 6 hr |
| Dec 15, 2:51 PM EST | Winter Weather Advisory | LWX | 37 hr |
| Dec 17, 11:47 AM EST | Dense Fog Advisory | LWX | 3 hr |
| Dec 30, 4:43 AM EST | Dense Fog Advisory | LWX | 4 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.