Alert archive / Virginia / Washington County
Weather alerts in Washington County, Virginia, 2012
123 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 123
- Warnings
- 35
- Watches
- 16
- Advisories
- 44
- Busiest month
- July32 alerts
- Busiest day
- March 2, 20127 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 10 tornado warnings covering Washington County in 2012 had a tornado report inside them.
Washington County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 10 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 20 | 11 | 45% | 7 | 86% | 28 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 81 | 12 | 85% | 23 | 83% | 19 min |
| NWS Morristown, TN: severe thunderstorm warnings | 311 | 198 | 36% | 358 | 78% | 22 min |
| NWS Morristown, TN: flash flood warnings | 16 | 8 | 50% | 14 | 93% | 63 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 1, 3:05 PM EST | Winter Weather Advisory | MRX | 43 hr |
| Jan 9, 9:11 PM EST | Dense Fog Advisory | MRX | 8 hr |
| Jan 11, 3:30 PM EST | Winter Weather Advisory | MRX | 45 hr |
| Jan 12, 3:38 AM EST | Wind Advisory | MRX | 24 hr |
| Jan 14, 3:05 PM EST | Winter Weather Advisory | MRX | 12 hr |
| Feb 10, 4:20 AM EST | Winter Weather Advisory | MRX | 39 hr |
| Feb 10, 1:03 PM EST | Wind Advisory | MRX | 30 hr |
| Feb 11, 7:25 PM EST | Wind Chill Advisory | MRX | 9 hr |
| Feb 14, 6:47 PM EST | Dense Fog Advisory | MRX | 15 hr |
| Feb 17, 8:34 PM EST | Winter Storm Watch | MRX | 31 hr |
| Feb 18, 3:28 PM EST | Winter Storm Warning | MRX | 33 hr |
| Feb 19, 12:47 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 21, 12:24 PM EST | Wind Advisory | MRX | 7 hr |
| Feb 22, 9:03 PM EST | Areal Flood Advisory | MRX | 117 min |
| Feb 23, 3:37 PM EST | Wind Advisory | MRX | 27 hr |
| Feb 24, 4:33 AM EST | Tornado Warning | MRX | 6 days |
| Feb 24, 4:56 AM EST | Severe Thunderstorm Warning | MRX | 49 min |
| Feb 24, 5:29 AM EST | Severe Thunderstorm Warning | MRX | 19 min |
| Feb 24, 9:05 AM EST | Mesoscale Discussion | SPC | 25 min |
| Feb 24, 12:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 24, 3:24 PM EST | Mesoscale Discussion | SPC | 66 min |
| Feb 25, 2:50 AM EST | Wind Advisory | MRX | 13 hr |
| Feb 29, 12:31 PM EST | Tornado Watch | SPC | 8 hr |
| Feb 29, 3:23 PM EST | Mesoscale Discussion | SPC | 67 min |
| Feb 29, 6:29 PM EST | Tornado Warning | MRX | 31 min |
| Mar 1, 12:12 AM EST | Tornado Warning | MRX | 33 min |
| Mar 1, 12:20 AM EST | Mesoscale Discussion | SPC | 85 min |
| Mar 1, 1:16 AM EST | Areal Flood Advisory | MRX | 119 min |
| Mar 2, 10:25 AM EST | Tornado Watch | SPC | 5 hr |
| Mar 2, 10:45 AM EST | Severe Thunderstorm Warning | MRX | 30 min |
| Mar 2, 10:58 AM EST | Severe Thunderstorm Warning | MRX | 32 min |
| Mar 2, 10:59 AM EST | Flood Watch | MRX | 14 hr |
| Mar 2, 11:22 AM EST | Tornado Warning | MRX | 38 min |
| Mar 2, 1:26 PM EST | Tornado Warning | MRX | 34 min |
| Mar 2, 3:19 PM EST | Tornado Watch | SPC | 8 hr |
| Mar 2, 9:45 PM EST | Tornado Warning | MRX | 60 min |
| Mar 2, 10:44 PM EST | Severe Thunderstorm Warning | MRX | 46 min |
| Mar 4, 3:22 AM EST | Winter Weather Advisory | MRX | 33 hr |
| Mar 4, 3:22 PM EST | Winter Storm Warning | MRX | 15 hr |
| Mar 15, 2:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 8:08 PM EDT | Areal Flood Advisory | MRX | 112 min |
| Apr 1, 3:54 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Apr 4, 1:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 6, 3:21 AM EDT | Frost Advisory | MRX | 31 hr |
| Apr 9, 3:10 AM EDT | Freeze Watch | MRX | 24 hr |
| Apr 10, 3:35 AM EDT | Freeze Warning | MRX | 29 hr |
| Apr 10, 8:49 PM EDT | Freeze Watch | MRX | 18 hr |
| Apr 11, 3:01 PM EDT | Freeze Warning | MRX | 18 hr |
| Apr 12, 3:00 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 22, 4:33 AM EDT | Wind Advisory | MRX | 48 hr |
| Apr 25, 11:52 PM EDT | Severe Thunderstorm Warning | MRX | 23 min |
| Apr 26, 6:22 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 26, 7:24 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 26, 8:21 AM EDT | Severe Thunderstorm Warning | MRX | 44 min |
| Apr 26, 8:47 AM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 26, 6:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 16, 5:32 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| May 24, 3:30 AM EDT | Dense Fog Advisory | MRX | 7 hr |
| Jun 30, 4:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 7:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 9:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 1, 9:44 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 10:36 AM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jul 1, 10:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 1, 11:30 PM EDT | Severe Thunderstorm Warning | MRX | 60 min |
| Jul 3, 6:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 5, 11:14 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 5, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 2:11 PM EDT | Severe Thunderstorm Warning | MRX | 64 min |
| Jul 5, 2:56 PM EDT | Severe Thunderstorm Warning | MRX | 64 min |
| Jul 5, 2:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 4:05 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 8, 3:29 PM EDT | Severe Thunderstorm Warning | MRX | 61 min |
| Jul 8, 10:50 PM EDT | Areal Flood Advisory | MRX | 115 min |
| Jul 10, 7:16 AM EDT | Areal Flood Advisory | MRX | 119 min |
| Jul 11, 12:48 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Jul 17, 5:33 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Jul 19, 2:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 19, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 7:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 22, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 3:57 PM EDT | Areal Flood Advisory | MRX | 63 min |
| Jul 23, 12:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 12:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 24, 4:31 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| Jul 25, 2:16 AM EDT | Severe Thunderstorm Warning | MRX | 59 min |
| Jul 25, 2:32 AM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 25, 2:56 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 25, 3:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 31, 6:47 PM EDT | Severe Thunderstorm Warning | MRX | 28 min |
| Jul 31, 7:22 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 1, 2:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 3, 3:43 PM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Aug 3, 5:18 PM EDT | Severe Thunderstorm Warning | MRX | 42 min |
| Aug 5, 6:24 PM EDT | Flash Flood Warning | MRX | 3 hr |
| Aug 7, 10:15 PM EDT | Dense Fog Advisory | MRX | 8 hr |
| Aug 9, 4:44 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 9, 4:58 PM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Aug 9, 6:34 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Aug 10, 12:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Sep 17, 3:23 AM EDT | Flood Watch | MRX | 39 hr |
| Sep 23, 3:04 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 10, 3:06 AM EDT | Frost Advisory | MRX | 30 hr |
| Oct 17, 3:21 PM EDT | Wind Advisory | MRX | 19 hr |
| Oct 18, 4:43 PM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Oct 18, 5:29 PM EDT | Severe Thunderstorm Warning | MRX | 20 min |
| Oct 28, 3:13 AM EDT | Wind Advisory | MRX | 65 hr |
| Oct 28, 3:39 AM EDT | Freeze Warning | MRX | 29 hr |
| Oct 28, 3:51 AM EDT | Winter Storm Watch | MRX | 12 hr |
| Oct 28, 3:43 PM EDT | Winter Storm Warning | MRX | 60 hr |
| Oct 30, 1:02 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 31, 3:52 AM EDT | Winter Weather Advisory | MRX | 11 hr |
| Dec 18, 2:55 PM EST | High Wind Watch | MRX | 23 hr |
| Dec 19, 2:21 PM EST | High Wind Warning | MRX | 26 hr |
| Dec 20, 3:31 AM EST | Wind Advisory | MRX | 39 hr |
| Dec 21, 4:19 AM EST | Winter Weather Advisory | MRX | 15 hr |
| Dec 24, 2:52 PM EST | High Wind Watch | MRX | 19 hr |
| Dec 24, 3:29 PM EST | Dense Fog Advisory | MRX | 19 hr |
| Dec 25, 10:11 AM EST | High Wind Warning | MRX | 27 hr |
| Dec 25, 3:13 PM EST | Wind Advisory | MRX | 37 hr |
| Dec 26, 3:55 AM EST | Winter Weather Advisory | MRX | 27 hr |
| Dec 28, 3:11 PM EST | Winter Weather Advisory | MRX | 37 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 | 20 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 28 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 13 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
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.