Alert archive / Virginia / Spotsylvania County
Weather alerts in Spotsylvania County, Virginia, 2012
163 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Spotsylvania County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 163
- Warnings
- 42
- Watches
- 31
- Advisories
- 28
- Busiest month
- June43 alerts
- Busiest day
- June 30, 201211 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Spotsylvania County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 26 | 22 | 15% | 32 | 94% | 27 min |
| Flash flood warnings | 3 | 2 | 33% | 5 | 80% | 82 min |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 43 | 9 | 79% | 18 | 61% | 13 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 365 | 286 | 22% | 1,001 | 90% | 26 min |
| NWS Baltimore/Washington: flash flood warnings | 81 | 46 | 43% | 156 | 78% | 70 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 20, 1:00 PM EST | Winter Weather Advisory | LWX | 24 hr |
| Jan 21, 4:20 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 22, 1:26 PM EST | Freezing Rain Advisory | LWX | 22 hr |
| Jan 24, 1:01 AM EST | Dense Fog Advisory | LWX | 9 hr |
| Feb 11, 2:13 PM EST | Special Weather Statement | LWX | 77 min |
| Feb 16, 11:24 PM EST | Dense Fog Advisory | LWX | 10 hr |
| Feb 18, 9:53 PM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 24, 3:53 AM EST | Wind Advisory | LWX | 20 hr |
| Feb 24, 12:43 PM EST | Mesoscale Discussion | SPC | 92 min |
| Feb 24, 1:19 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 24, 2:36 PM EST | Special Weather Statement | LWX | 24 min |
| Feb 25, 12:08 AM EST | Wind Advisory | LWX | 3 hr |
| Feb 29, 8:10 PM EST | Areal Flood Warning | LWX | 84 min |
| Mar 2, 11:53 AM EST | Flood Watch | LWX | 18 hr |
| Mar 4, 9:46 PM EST | Winter Weather Advisory | LWX | 17 hr |
| Mar 5, 9:36 AM EST | Winter Storm Warning | LWX | 3 hr |
| Mar 17, 5:11 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Mar 20, 5:14 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Mar 21, 5:51 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Mar 22, 3:55 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Mar 24, 6:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 24, 11:43 PM EDT | Special Weather Statement | LWX | 47 min |
| Mar 25, 2:52 PM EDT | Freeze Watch | LWX | 26 hr |
| Mar 26, 4:10 AM EDT | Freeze Warning | LWX | 29 hr |
| Apr 6, 3:54 AM EDT | Freeze Warning | LWX | 28 hr |
| Apr 8, 3:28 AM EDT | Fire Weather Watch | LWX | 22 hr |
| Apr 8, 8:19 PM EDT | Red Flag Warning | LWX | 23 hr |
| Apr 9, 10:34 AM EDT | Fire Weather Watch | LWX | 10 hr |
| Apr 9, 8:39 PM EDT | Red Flag Warning | LWX | 27 hr |
| May 2, 1:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 15, 7:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| May 22, 12:58 AM EDT | Special Weather Statement | LWX | 92 min |
| May 24, 1:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 28, 4:16 AM EDT | Heat Advisory | LWX | 17 hr |
| May 29, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 29, 7:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 1, 12:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 1, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 1, 1:42 PM EDT | Special Weather Statement | LWX | 48 min |
| Jun 1, 1:50 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 3:16 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 1, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 1, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Jun 1, 6:35 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jun 1, 6:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 8:01 PM EDT | Tornado Watch | SPC | 4 hr |
| Jun 1, 8:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jun 12, 9:20 PM EDT | Special Weather Statement | LWX | 25 min |
| Jun 19, 1:57 PM EDT | Heat Advisory | LWX | 51 hr |
| Jun 22, 12:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 2:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 2:30 PM EDT | Special Weather Statement | LWX | 45 min |
| Jun 22, 3:12 PM EDT | Special Weather Statement | LWX | 48 min |
| Jun 22, 3:30 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jun 22, 3:48 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jun 22, 6:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 22, 8:35 PM EDT | Special Weather Statement | LWX | 40 min |
| Jun 25, 12:38 PM EDT | Special Weather Statement | LWX | 37 min |
| Jun 25, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 2:06 PM EDT | Special Weather Statement | LWX | 39 min |
| Jun 25, 3:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 27, 2:44 PM EDT | Excessive Heat Watch | LWX | 24 hr |
| Jun 28, 2:46 PM EDT | Heat Advisory | LWX | 30 hr |
| Jun 29, 1:33 AM EDT | Excessive Heat Watch | LWX | 27 hr |
| Jun 29, 10:03 AM EDT | Excessive Heat Warning | LWX | 11 hr |
| Jun 29, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 29, 6:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 29, 7:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 29, 9:46 PM EDT | Severe Thunderstorm Warning | LWX | 59 min |
| Jun 29, 10:10 PM EDT | Severe Thunderstorm Warning | LWX | 65 min |
| Jun 29, 10:42 PM EDT | Severe Thunderstorm Warning | LWX | 78 min |
| Jun 29, 10:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 30, 4:19 AM EDT | Excessive Heat Warning | LWX | 12 hr |
| Jun 30, 4:19 AM EDT | Heat Advisory | LWX | 14 hr |
| Jun 30, 4:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jun 30, 6:24 PM EDT | Severe Thunderstorm Warning | LWX | 66 min |
| Jun 30, 7:26 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jun 30, 7:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 9:01 PM EDT | Special Weather Statement | LWX | 29 min |
| Jun 30, 9:05 PM EDT | Severe Thunderstorm Warning | LWX | 10 min |
| Jul 4, 3:04 AM EDT | Heat Advisory | LWX | 18 hr |
| Jul 4, 3:12 PM EDT | Special Weather Statement | LWX | 3 hr |
| Jul 5, 3:45 AM EDT | Heat Advisory | LWX | 16 hr |
| Jul 5, 9:20 PM EDT | Excessive Heat Watch | LWX | 16 hr |
| Jul 6, 3:22 AM EDT | Heat Advisory | LWX | 17 hr |
| Jul 6, 1:49 PM EDT | Excessive Heat Warning | LWX | 32 hr |
| Jul 8, 3:45 AM EDT | Heat Advisory | LWX | 15 hr |
| Jul 8, 12:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 8, 1:44 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 4:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 8, 4:25 PM EDT | Severe Thunderstorm Warning | LWX | 65 min |
| Jul 8, 5:06 PM EDT | Severe Thunderstorm Warning | LWX | 69 min |
| Jul 8, 5:19 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 9, 12:09 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 14, 11:44 AM EDT | Flash Flood Watch | LWX | 10 hr |
| Jul 14, 5:59 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jul 14, 6:03 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 14, 6:07 PM EDT | Special Weather Statement | LWX | 38 min |
| Jul 14, 6:53 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 14, 9:17 PM EDT | Special Weather Statement | LWX | 43 min |
| Jul 15, 4:48 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jul 15, 6:39 PM EDT | Special Weather Statement | LWX | 51 min |
| Jul 15, 6:53 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 17, 1:40 PM EDT | Heat Advisory | LWX | 31 hr |
| Jul 18, 12:41 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 3:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 20, 4:26 AM EDT | Flash Flood Watch | LWX | 17 hr |
| Jul 24, 11:48 AM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 3:46 PM EDT | Special Weather Statement | LWX | 44 min |
| Jul 25, 2:08 PM EDT | Heat Advisory | LWX | 30 hr |
| Jul 26, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 27, 1:19 AM EDT | Heat Advisory | LWX | 15 hr |
| Jul 27, 1:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 27, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 4:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 5, 2:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 7:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 10, 9:33 PM EDT | Special Weather Statement | LWX | 42 min |
| Aug 14, 2:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 15, 6:09 PM EDT | Special Weather Statement | LWX | 51 min |
| Sep 5, 2:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 6, 7:29 AM EDT | Special Weather Statement | LWX | 61 min |
| Sep 6, 7:40 AM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Sep 6, 8:08 AM EDT | Flash Flood Warning | LWX | 3 hr |
| Sep 6, 8:25 AM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Sep 8, 12:15 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Sep 8, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Sep 8, 3:55 PM EDT | Special Weather Statement | LWX | 80 min |
| Sep 8, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Sep 8, 4:47 PM EDT | Special Weather Statement | LWX | 28 min |
| Sep 18, 8:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 18, 10:54 AM EDT | Tornado Watch | SPC | 9 hr |
| Sep 18, 11:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 18, 1:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 18, 1:56 PM EDT | Flash Flood Watch | LWX | 4 hr |
| Sep 18, 2:26 PM EDT | Severe Thunderstorm Warning | LWX | 64 min |
| Sep 18, 3:25 PM EDT | Severe Thunderstorm Warning | LWX | 65 min |
| Sep 27, 6:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 27, 8:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 27, 9:18 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Sep 28, 5:34 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Sep 28, 2:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 12, 2:00 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 18, 8:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 19, 3:12 AM EDT | Special Weather Statement | LWX | 33 min |
| Oct 27, 4:39 AM EDT | Flood Watch | LWX | 61 hr |
| Oct 27, 5:02 PM EDT | High Wind Watch | LWX | 12 hr |
| Oct 28, 4:34 AM EDT | High Wind Warning | LWX | 48 hr |
| Oct 29, 3:26 PM EDT | Areal Flood Warning | LWX | 23 hr |
| Oct 29, 4:49 PM EDT | River Flood Warning | LWX | 5 hr |
| Nov 4, 3:30 AM EST | Freeze Watch | LWX | 11 hr |
| Nov 5, 2:18 PM EST | Freeze Warning | LWX | 19 hr |
| Dec 9, 7:10 PM EST | Dense Fog Advisory | LWX | 14 hr |
| Dec 16, 8:42 PM EST | Dense Fog Advisory | LWX | 13 hr |
| Dec 20, 2:11 PM EST | High Wind Watch | LWX | 23 hr |
| Dec 20, 2:11 PM EST | Wind Advisory | LWX | 50 hr |
| Dec 21, 12:24 AM EST | Mesoscale Discussion | SPC | 2 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 archive20112013
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.