Alert archive / Virginia / Shenandoah County
Weather alerts in Shenandoah County, Virginia, 2018
153 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Shenandoah County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 153
- Warnings
- 56
- Watches
- 39
- Advisories
- 30
- Busiest month
- May30 alerts
- Busiest day
- May 14, 20187 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Shenandoah County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 14 | 86% | 17 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 19 | 1 | 95% | 4 | 25% | 1 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 312 | 208 | 33% | 690 | 70% | 20 min |
| NWS Baltimore/Washington: flash flood warnings | 87 | 38 | 56% | 129 | 89% | 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 4, 3:36 AM EST | Wind Chill Advisory | LWX | 32 hr |
| Jan 5, 3:45 AM EST | Wind Chill Advisory | LWX | 54 hr |
| Jan 7, 2:46 PM EST | Winter Weather Advisory | LWX | 33 hr |
| Feb 3, 3:00 PM EST | Winter Weather Advisory | LWX | 28 hr |
| Feb 6, 4:02 AM EST | Winter Weather Advisory | LWX | 38 hr |
| Feb 10, 3:38 AM EST | Flood Watch | LWX | 36 hr |
| Feb 16, 9:12 PM EST | Winter Weather Advisory | LWX | 31 hr |
| Feb 28, 2:52 PM EST | High Wind Watch | LWX | 21 hr |
| Mar 1, 4:06 AM EST | High Wind Warning | LWX | 45 hr |
| Mar 1, 10:37 PM EST | Special Weather Statement | LWX | 7 hr |
| Mar 2, 7:57 PM EST | Wind Advisory | LWX | 10 hr |
| Mar 11, 2:37 PM EDT | Winter Weather Advisory | LWX | 23 hr |
| Mar 16, 1:27 PM EDT | Winter Weather Advisory | LWX | 23 hr |
| Mar 19, 12:06 PM EDT | Winter Storm Watch | LWX | 25 hr |
| Mar 19, 3:42 PM EDT | Winter Storm Warning | LWX | 52 hr |
| Mar 19, 3:42 PM EDT | Winter Weather Advisory | LWX | 28 hr |
| Mar 20, 10:00 AM EDT | Special Weather Statement | LWX | 15 min |
| Mar 20, 9:55 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 29, 4:23 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Apr 1, 4:01 AM EDT | Winter Weather Advisory | LWX | 27 hr |
| Apr 3, 5:33 PM EDT | Wind Advisory | LWX | 25 hr |
| Apr 11, 1:34 PM EDT | Fire Weather Watch | LWX | 14 hr |
| Apr 12, 3:42 AM EDT | Red Flag Warning | LWX | 16 hr |
| Apr 15, 2:42 PM EDT | Flash Flood Watch | LWX | 13 hr |
| Apr 16, 4:13 AM EDT | Flash Flood Warning | LWX | 85 min |
| Apr 16, 4:29 AM EDT | Freeze Watch | LWX | 12 hr |
| Apr 16, 5:37 AM EDT | Areal Flood Warning | LWX | 13 hr |
| Apr 16, 4:25 PM EDT | Freeze Warning | LWX | 15 hr |
| Apr 17, 4:08 AM EDT | Freeze Watch | LWX | 9 hr |
| Apr 17, 1:24 PM EDT | Freeze Warning | LWX | 19 hr |
| Apr 19, 4:27 AM EDT | Freeze Watch | LWX | 10 hr |
| Apr 19, 2:22 PM EDT | Freeze Warning | LWX | 18 hr |
| Apr 20, 4:16 AM EDT | Freeze Watch | LWX | 10 hr |
| Apr 20, 2:28 PM EDT | Freeze Warning | LWX | 19 hr |
| Apr 29, 3:15 PM EDT | Freeze Warning | LWX | 17 hr |
| Apr 29, 3:18 PM EDT | Fire Weather Watch | LWX | 12 hr |
| Apr 30, 3:32 AM EDT | Red Flag Warning | LWX | 16 hr |
| May 7, 2:34 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| May 10, 12:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 10, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 10, 4:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 12, 5:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 13, 1:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 13, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 13, 7:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 14, 5:32 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| May 14, 11:56 AM EDT | Mesoscale Discussion | SPC | 64 min |
| May 14, 12:29 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 14, 3:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 4:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 14, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| May 14, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | 57 min |
| May 15, 4:33 AM EDT | Flash Flood Watch | LWX | 20 hr |
| May 16, 1:40 PM EDT | Flood Watch | LWX | 3 days |
| May 22, 12:53 AM EDT | River Flood Warning | LWX | 6 hr |
| May 22, 6:01 AM EDT | Areal Flood Warning | LWX | 11 hr |
| May 22, 1:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 22, 4:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 22, 5:47 PM EDT | Areal Flood Warning | LWX | 6 hr |
| May 26, 3:15 AM EDT | Flash Flood Watch | LWX | 15 hr |
| May 26, 3:29 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| May 26, 3:53 PM EDT | Areal Flood Warning | LWX | 6 hr |
| May 27, 4:25 AM EDT | Flash Flood Watch | LWX | 16 hr |
| May 27, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 28, 2:56 PM EDT | Areal Flood Warning | LWX | 4 hr |
| May 30, 4:24 AM EDT | Flash Flood Watch | LWX | 25 hr |
| May 31, 4:06 AM EDT | Flash Flood Watch | LWX | 17 hr |
| Jun 2, 3:13 AM EDT | Flash Flood Watch | LWX | 25 hr |
| Jun 3, 4:11 AM EDT | Flood Watch | LWX | 14 hr |
| Jun 3, 5:07 AM EDT | Areal Flood Warning | LWX | 24 hr |
| Jun 3, 5:43 AM EDT | Areal Flood Warning | LWX | 22 hr |
| Jun 3, 7:25 AM EDT | Areal Flood Warning | LWX | 20 hr |
| Jun 3, 8:23 PM EDT | River Flood Warning | LWX | 15 hr |
| Jun 9, 1:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 5:23 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| Jun 9, 5:36 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Jun 9, 5:52 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 9, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jun 10, 3:47 AM EDT | Flash Flood Watch | LWX | 24 hr |
| Jun 19, 12:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 21, 4:11 AM EDT | Flash Flood Watch | LWX | 29 hr |
| Jun 22, 6:39 AM EDT | River Flood Warning | LWX | 6 hr |
| Jun 22, 8:24 AM EDT | Areal Flood Warning | LWX | 12 hr |
| Jun 22, 9:57 AM EDT | River Flood Warning | LWX | 30 hr |
| Jun 22, 10:12 PM EDT | Areal Flood Warning | LWX | 11 hr |
| Jun 23, 8:41 AM EDT | Areal Flood Warning | LWX | 3 hr |
| Jun 27, 7:37 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 2:14 PM EDT | Heat Advisory | LWX | 27 hr |
| Jul 1, 2:10 PM EDT | Heat Advisory | LWX | 30 hr |
| Jul 2, 1:40 PM EDT | Heat Advisory | LWX | 30 hr |
| Jul 4, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jul 4, 4:35 PM EDT | Areal Flood Warning | LWX | 7 hr |
| Jul 5, 9:56 AM EDT | Flash Flood Watch | LWX | 17 hr |
| Jul 23, 4:59 AM EDT | Flash Flood Watch | LWX | 68 hr |
| Jul 25, 12:11 PM EDT | Areal Flood Warning | LWX | 5 hr |
| Jul 25, 5:26 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Jul 26, 1:47 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Jul 27, 1:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 27, 1:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 1, 4:10 AM EDT | Flash Flood Watch | LWX | 3 days |
| Aug 1, 3:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 1, 6:25 PM EDT | Areal Flood Warning | LWX | 102 min |
| Aug 1, 7:15 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Aug 3, 8:39 PM EDT | Areal Flood Warning | LWX | 18 hr |
| Aug 4, 2:23 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| Aug 6, 1:57 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Aug 12, 12:23 PM EDT | Flash Flood Watch | LWX | 9 hr |
| Aug 13, 3:20 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Aug 13, 4:21 AM EDT | Flash Flood Watch | LWX | 18 hr |
| Aug 13, 1:57 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 2:06 PM EDT | Severe Thunderstorm Warning | LWX | 54 min |
| Aug 17, 2:53 PM EDT | Severe Thunderstorm Warning | LWX | 67 min |
| Aug 17, 3:10 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 3:15 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Aug 18, 8:03 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Aug 21, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 7:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 21, 7:58 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Aug 21, 8:02 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 30, 1:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 30, 3:34 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Sep 1, 12:11 PM EDT | Flash Flood Watch | LWX | 8 hr |
| Sep 1, 3:41 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Sep 2, 7:23 AM EDT | Dense Fog Advisory | LWX | 2 hr |
| Sep 7, 3:29 AM EDT | Flash Flood Watch | LWX | 19 hr |
| Sep 8, 2:46 PM EDT | Flood Watch | LWX | 39 hr |
| Sep 16, 3:11 PM EDT | Flash Flood Watch | LWX | 52 hr |
| Sep 17, 2:45 PM EDT | Areal Flood Warning | LWX | 12 hr |
| Sep 17, 5:54 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Sep 20, 4:09 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| Sep 26, 3:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 27, 2:39 AM EDT | Flood Watch | LWX | 27 hr |
| Sep 27, 8:24 PM EDT | Areal Flood Warning | LWX | 15 hr |
| Sep 27, 9:53 PM EDT | Areal Flood Warning | LWX | 33 hr |
| Sep 29, 4:24 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Oct 8, 2:58 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Oct 10, 5:30 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Oct 17, 2:46 PM EDT | Freeze Watch | LWX | 24 hr |
| Oct 18, 2:57 PM EDT | Freeze Warning | LWX | 18 hr |
| Oct 20, 1:10 PM EDT | Wind Advisory | LWX | 18 hr |
| Nov 13, 3:46 PM EST | Winter Storm Watch | LWX | 24 hr |
| Nov 14, 3:54 PM EST | Winter Storm Warning | LWX | 36 hr |
| Nov 15, 3:18 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 15, 9:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 23, 3:32 AM EST | Winter Weather Advisory | LWX | 36 hr |
| Nov 27, 2:03 PM EST | Wind Advisory | LWX | 24 hr |
| Dec 2, 6:32 PM EST | Dense Fog Advisory | LWX | 11 hr |
| Dec 13, 2:04 PM EST | Flood Watch | LWX | 63 hr |
| Dec 15, 2:27 PM EST | Areal Flood Warning | LWX | 15 hr |
| Dec 19, 3:48 AM EST | Flood Watch | LWX | 59 hr |
| Dec 21, 2:33 PM EST | Mesoscale Discussion | SPC | 57 min |
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 | 15 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 2 |
| Flooding | |
| Areal Flood Warning | 24 |
| Flash Flood Warning | 2 |
| River Flood Warning | 4 |
| Flash Flood Watch | 17 |
| Flood Watch | 7 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 5 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.