Alert archive / Virginia / Shenandoah County
Weather alerts in Shenandoah County, Virginia, 2013
134 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 134
- Warnings
- 37
- Watches
- 29
- Advisories
- 29
- Busiest month
- May25 alerts
- Busiest day
- June 13, 201311 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, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 7 | 50% | 7 | 100% | 22 min |
| Flash flood warnings | 3 | 1 | 67% | 4 | 0% |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 22 | 9 | 59% | 21 | 62% | 11 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 210 | 141 | 33% | 495 | 74% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 81 | 51 | 37% | 124 | 78% | 74 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 11, 4:39 PM EST | Dense Fog Advisory | LWX | 19 hr |
| Jan 12, 7:27 PM EST | Dense Fog Advisory | LWX | 18 hr |
| Jan 15, 1:13 PM EST | Winter Weather Advisory | LWX | 22 hr |
| Jan 16, 3:28 AM EST | Winter Storm Watch | LWX | 24 hr |
| Jan 27, 4:02 AM EST | Winter Weather Advisory | LWX | 32 hr |
| Jan 29, 2:54 PM EST | Wind Advisory | LWX | 47 hr |
| Jan 30, 4:07 AM EST | Flash Flood Watch | LWX | 21 hr |
| Jan 30, 10:19 AM EST | Mesoscale Discussion | SPC | 86 min |
| Jan 30, 12:39 PM EST | Special Weather Statement | LWX | 51 min |
| Jan 30, 12:54 PM EST | Mesoscale Discussion | SPC | 96 min |
| Jan 30, 1:14 PM EST | Special Weather Statement | LWX | 46 min |
| Jan 30, 11:11 PM EST | Areal Flood Warning | LWX | 6 hr |
| Jan 31, 7:00 AM EST | Areal Flood Warning | LWX | 6 hr |
| Jan 31, 10:04 AM EST | River Flood Watch | LWX | 5 hr |
| Feb 7, 3:09 PM EST | Winter Weather Advisory | LWX | 19 hr |
| Feb 8, 1:26 PM EST | Wind Advisory | LWX | 17 hr |
| Feb 11, 11:15 AM EST | Wind Advisory | LWX | 23 hr |
| Feb 17, 6:56 AM EST | Special Weather Statement | LWX | 64 min |
| Feb 17, 9:11 AM EST | Special Weather Statement | LWX | 6 hr |
| Feb 17, 9:43 AM EST | Special Weather Statement | LWX | 77 min |
| Feb 22, 3:27 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Feb 25, 2:34 PM EST | Winter Weather Advisory | LWX | 27 hr |
| Mar 4, 3:11 AM EST | Winter Storm Watch | LWX | 36 hr |
| Mar 4, 8:48 PM EST | Winter Storm Warning | LWX | 42 hr |
| Mar 5, 10:52 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 6, 3:25 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 16, 3:33 PM EDT | Winter Storm Watch | LWX | 12 hr |
| Mar 17, 3:03 AM EDT | Winter Storm Warning | LWX | 30 hr |
| Mar 18, 8:46 AM EDT | Winter Weather Advisory | LWX | 17 hr |
| Mar 23, 8:45 PM EDT | Winter Storm Warning | LWX | 39 hr |
| Mar 24, 4:26 AM EDT | Winter Weather Advisory | LWX | 38 hr |
| Mar 24, 11:53 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 25, 12:35 AM EDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 25, 5:31 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 2, 3:32 PM EDT | Fire Weather Watch | LWX | 13 hr |
| Apr 3, 4:30 AM EDT | Red Flag Warning | LWX | 16 hr |
| Apr 4, 4:36 PM EDT | Winter Weather Advisory | LWX | 9 hr |
| Apr 16, 11:17 PM EDT | Special Weather Statement | LWX | 43 min |
| Apr 19, 1:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 19, 2:31 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 19, 4:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 6, 1:45 PM EDT | Flood Watch | LWX | 34 hr |
| May 7, 12:31 PM EDT | Areal Flood Warning | LWX | 15 hr |
| May 8, 3:27 AM EDT | Areal Flood Warning | LWX | 2 hr |
| May 8, 7:17 AM EDT | Areal Flood Warning | LWX | 12 hr |
| May 8, 8:40 AM EDT | Flood Watch | LWX | 10 hr |
| May 8, 10:38 AM EDT | Areal Flood Warning | LWX | 3 hr |
| May 8, 3:11 PM EDT | Areal Flood Warning | LWX | 4 hr |
| May 8, 4:10 PM EDT | Special Weather Statement | LWX | 35 min |
| May 8, 7:06 PM EDT | Areal Flood Warning | LWX | 3 hr |
| May 8, 10:01 PM EDT | Areal Flood Warning | LWX | 4 hr |
| May 8, 11:27 PM EDT | Dense Fog Advisory | LWX | 9 hr |
| May 12, 1:53 PM EDT | Freeze Watch | LWX | 25 hr |
| May 12, 4:35 PM EDT | Frost Advisory | LWX | 15 hr |
| May 13, 3:15 PM EDT | Freeze Warning | LWX | 17 hr |
| May 20, 6:23 PM EDT | Flash Flood Warning | LWX | 3 hr |
| May 22, 3:32 PM EDT | Severe Thunderstorm Warning | LWX | 58 min |
| May 22, 3:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 22, 4:29 PM EDT | Severe Thunderstorm Warning | LWX | 61 min |
| May 22, 5:16 PM EDT | Flash Flood Warning | LWX | 3 hr |
| May 22, 7:28 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| May 22, 7:58 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| May 23, 3:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 23, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| May 23, 4:12 PM EDT | Flash Flood Warning | LWX | 5 hr |
| May 23, 4:28 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Jun 9, 9:09 PM EDT | Flash Flood Watch | LWX | 26 hr |
| Jun 10, 2:02 PM EDT | Tornado Watch | SPC | 10 hr |
| Jun 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 12, 1:50 PM EDT | Flash Flood Watch | LWX | 30 hr |
| Jun 12, 6:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 13, 2:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 3:58 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 5:27 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 7:28 AM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Jun 13, 7:52 AM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 13, 8:10 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 13, 8:11 AM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jun 13, 11:38 AM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 13, 12:19 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 1:55 PM EDT | Severe Thunderstorm Warning | LWX | 80 min |
| Jun 13, 2:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 18, 3:54 AM EDT | Flash Flood Watch | LWX | 13 hr |
| Jun 25, 6:20 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 26, 1:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 3:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 28, 1:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 28, 1:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 7:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 30, 11:48 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 12:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 7, 1:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 7, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 12, 3:46 AM EDT | Flash Flood Watch | LWX | 14 hr |
| Jul 12, 12:13 PM EDT | Areal Flood Warning | LWX | 9 hr |
| Jul 14, 4:56 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Jul 17, 2:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 19, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jul 20, 1:07 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 22, 10:01 AM EDT | Flash Flood Watch | LWX | 13 hr |
| Aug 12, 5:05 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Aug 20, 2:49 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Aug 21, 5:15 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Sep 12, 1:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Oct 15, 4:40 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Oct 20, 1:13 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 23, 1:28 PM EDT | Freeze Watch | LWX | 24 hr |
| Oct 24, 1:34 PM EDT | Freeze Warning | LWX | 19 hr |
| Oct 31, 12:53 PM EDT | Wind Advisory | LWX | 22 hr |
| Nov 1, 3:37 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Nov 1, 4:17 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 10, 12:27 PM EST | Red Flag Warning | LWX | 5 hr |
| Nov 17, 12:35 PM EST | Wind Advisory | LWX | 17 hr |
| Nov 17, 11:08 PM EST | Mesoscale Discussion | SPC | 67 min |
| Nov 17, 11:31 PM EST | Severe Thunderstorm Watch | SPC | 2 hr |
| Nov 18, 12:16 AM EST | Severe Thunderstorm Warning | LWX | 59 min |
| Nov 23, 11:05 AM EST | Fire Weather Watch | LWX | 17 hr |
| Nov 24, 3:23 AM EST | Red Flag Warning | LWX | 15 hr |
| Nov 25, 9:58 AM EST | Winter Weather Advisory | LWX | 62 hr |
| Nov 26, 2:56 PM EST | Winter Weather Advisory | LWX | 33 hr |
| Nov 27, 4:38 AM EST | Wind Advisory | LWX | 19 hr |
| Dec 6, 12:07 PM EST | Winter Storm Watch | LWX | 32 hr |
| Dec 7, 8:34 PM EST | Winter Storm Warning | LWX | 36 hr |
| Dec 8, 11:05 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 9, 10:09 AM EST | Winter Storm Watch | LWX | 4 hr |
| Dec 9, 2:29 PM EST | Winter Weather Advisory | LWX | 21 hr |
| Dec 9, 5:22 PM EST | Dense Fog Advisory | LWX | 10 hr |
| Dec 9, 8:54 PM EST | Winter Storm Warning | LWX | 15 hr |
| Dec 10, 4:37 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 2:33 PM EST | Winter Weather Advisory | LWX | 34 hr |
| Dec 21, 5:32 PM EST | Wind Advisory | LWX | 19 hr |
| Dec 22, 3:37 AM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Dec 22, 6:14 AM EST | Mesoscale Discussion | SPC | 61 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 | 14 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 32 |
| Special Weather Statement | 7 |
| Flooding | |
| Areal Flood Warning | 10 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 6 |
| Flood Watch | 2 |
| River Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 12 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.