Alert archive / Virginia / Appomattox County
Weather alerts in Appomattox County, Virginia, 2013
141 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Appomattox County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 141
- Warnings
- 26
- Watches
- 18
- Advisories
- 27
- Busiest month
- June34 alerts
- Busiest day
- June 30, 20138 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Appomattox County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 8 | 43% | 8 | 88% | 24 min |
| Flash flood warnings | 5 | 3 | 40% | 2 | 100% | 54 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 3 | 0 | 100% | 1 | 0% | |
| NWS Blacksburg, VA: severe thunderstorm warnings | 198 | 126 | 36% | 389 | 78% | 24 min |
| NWS Blacksburg, VA: flash flood warnings | 69 | 38 | 45% | 121 | 73% | 101 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, 2:37 PM EST | Dense Fog Advisory | RNK | 19 hr |
| Jan 12, 8:01 PM EST | Dense Fog Advisory | RNK | 14 hr |
| Jan 16, 3:56 PM EST | Winter Storm Warning | RNK | 33 hr |
| Jan 16, 3:56 PM EST | Winter Weather Advisory | RNK | 12 hr |
| Jan 17, 6:54 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 24, 3:52 PM EST | Winter Weather Advisory | RNK | 41 hr |
| Jan 27, 5:00 AM EST | Freezing Rain Advisory | RNK | 29 hr |
| Jan 29, 4:07 PM EST | Wind Advisory | RNK | 69 hr |
| Jan 30, 12:54 PM EST | Mesoscale Discussion | SPC | 96 min |
| Jan 30, 3:42 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Jan 30, 5:48 PM EST | Severe Thunderstorm Warning | RNK | 42 min |
| Jan 30, 7:09 PM EST | Mesoscale Discussion | SPC | 66 min |
| Jan 30, 8:02 PM EST | Flash Flood Warning | RNK | 6 hr |
| Jan 30, 8:21 PM EST | Tornado Watch | SPC | 6 hr |
| Jan 30, 9:48 PM EST | Special Weather Statement | RNK | 42 min |
| Feb 15, 3:35 PM EST | Winter Weather Advisory | RNK | 46 hr |
| Feb 21, 4:59 AM EST | Winter Weather Advisory | RNK | 53 hr |
| Feb 25, 4:08 AM EST | Winter Weather Advisory | RNK | 38 hr |
| Mar 4, 5:24 AM EST | Winter Storm Watch | RNK | 23 hr |
| Mar 5, 4:48 AM EST | Winter Storm Warning | RNK | 39 hr |
| Mar 5, 4:48 AM EST | Winter Weather Advisory | RNK | 53 hr |
| Mar 12, 10:00 AM EDT | Special Weather Statement | RNK | 15 min |
| Mar 16, 3:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Mar 16, 5:12 PM EDT | Special Weather Statement | RNK | 63 min |
| Mar 23, 4:15 PM EDT | Winter Storm Warning | RNK | 70 hr |
| Mar 23, 8:54 PM EDT | Winter Weather Advisory | RNK | 65 hr |
| Apr 4, 4:36 AM EDT | Winter Weather Advisory | RNK | 21 hr |
| Apr 12, 1:58 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 12, 5:05 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 12, 5:39 AM EDT | Special Weather Statement | RNK | 66 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, 4:27 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Apr 19, 4:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 19, 4:55 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Apr 24, 6:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 5:16 PM EDT | Special Weather Statement | RNK | 89 min |
| May 6, 7:01 PM EDT | Special Weather Statement | RNK | 44 min |
| May 7, 1:12 PM EDT | Special Weather Statement | RNK | 48 min |
| May 7, 1:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 7, 5:04 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| May 7, 5:30 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| May 8, 10:19 AM EDT | Flood Watch | RNK | 5 hr |
| May 9, 12:02 AM EDT | Dense Fog Advisory | RNK | 8 hr |
| May 11, 1:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 11, 7:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 11, 7:41 PM EDT | Severe Thunderstorm Warning | RNK | 49 min |
| May 11, 8:23 PM EDT | Special Weather Statement | RNK | 37 min |
| May 13, 4:00 PM EDT | Frost Advisory | RNK | 17 hr |
| May 17, 7:12 PM EDT | Special Weather Statement | RNK | 63 min |
| May 18, 12:31 AM EDT | Special Weather Statement | RNK | 29 min |
| May 23, 3:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 23, 9:32 PM EDT | Special Weather Statement | RNK | 28 min |
| Jun 2, 3:00 PM EDT | Special Weather Statement | RNK | 45 min |
| Jun 3, 4:04 PM EDT | Special Weather Statement | RNK | 56 min |
| Jun 3, 6:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Jun 6, 1:13 PM EDT | Flood Watch | RNK | 30 hr |
| Jun 6, 8:59 PM EDT | Areal Flood Warning | RNK | 3 hr |
| Jun 9, 9:00 PM EDT | Flash Flood Watch | RNK | 22 hr |
| Jun 10, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 2:02 PM EDT | Tornado Watch | SPC | 10 hr |
| Jun 10, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 10, 5:13 PM EDT | Severe Thunderstorm Warning | RNK | 47 min |
| Jun 10, 5:57 PM EDT | Severe Thunderstorm Warning | RNK | 48 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, 2:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 13, 2:36 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jun 13, 2:54 PM EDT | Severe Thunderstorm Warning | RNK | 81 min |
| Jun 13, 3:28 PM EDT | Severe Thunderstorm Warning | RNK | 47 min |
| Jun 18, 10:40 AM EDT | Flash Flood Watch | RNK | 7 hr |
| Jun 26, 1:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 4:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 4:44 PM EDT | Severe Thunderstorm Warning | RNK | 46 min |
| Jun 28, 1:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 28, 2:40 PM EDT | Special Weather Statement | RNK | 65 min |
| Jun 28, 2:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 4:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 30, 5:25 AM EDT | Special Weather Statement | RNK | 65 min |
| Jun 30, 11:48 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 2:19 PM EDT | Special Weather Statement | RNK | 41 min |
| Jun 30, 2:45 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jun 30, 4:34 PM EDT | Special Weather Statement | RNK | 56 min |
| Jun 30, 4:55 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jun 30, 5:13 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Jun 30, 5:20 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Jul 2, 4:19 AM EDT | Flash Flood Watch | RNK | 5 days |
| Jul 3, 3:23 PM EDT | Special Weather Statement | RNK | 82 min |
| Jul 10, 6:19 PM EDT | Special Weather Statement | RNK | 26 min |
| Jul 10, 6:51 PM EDT | Special Weather Statement | RNK | 24 min |
| Jul 11, 4:48 AM EDT | Flash Flood Watch | RNK | 44 hr |
| Jul 11, 3:26 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 11, 4:10 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 11, 4:53 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 11, 5:33 PM EDT | Flash Flood Warning | RNK | 3 hr |
| Jul 11, 8:25 PM EDT | Areal Flood Warning | RNK | 3 hr |
| Jul 13, 9:31 PM EDT | Special Weather Statement | RNK | 29 min |
| Jul 16, 3:20 PM EDT | Special Weather Statement | RNK | 55 min |
| Jul 17, 2:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 18, 9:58 AM EDT | Heat Advisory | RNK | 8 hr |
| Jul 20, 5:25 PM EDT | Special Weather Statement | RNK | 50 min |
| Jul 20, 5:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 20, 6:32 PM EDT | Special Weather Statement | RNK | 58 min |
| Jul 20, 6:47 PM EDT | Flash Flood Warning | RNK | 3 hr |
| Jul 21, 3:42 PM EDT | Special Weather Statement | RNK | 33 min |
| Jul 21, 4:10 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 24, 2:11 PM EDT | Special Weather Statement | RNK | 64 min |
| Jul 24, 4:48 PM EDT | Special Weather Statement | RNK | 42 min |
| Jul 24, 8:24 PM EDT | Severe Thunderstorm Warning | RNK | 51 min |
| Aug 1, 6:51 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Aug 6, 6:35 PM EDT | Special Weather Statement | RNK | 25 min |
| Aug 6, 7:01 PM EDT | Special Weather Statement | RNK | 29 min |
| Aug 6, 7:37 PM EDT | Special Weather Statement | RNK | 23 min |
| Aug 10, 11:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 10, 1:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 10, 9:21 PM EDT | Special Weather Statement | RNK | 54 min |
| Aug 10, 9:38 PM EDT | Areal Flood Advisory | RNK | 112 min |
| Aug 11, 3:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 11, 6:10 PM EDT | Special Weather Statement | RNK | 50 min |
| Aug 11, 6:53 PM EDT | Areal Flood Advisory | RNK | 112 min |
| Aug 20, 2:18 AM EDT | Dense Fog Advisory | RNK | 8 hr |
| Aug 22, 12:09 AM EDT | Special Weather Statement | RNK | 51 min |
| Aug 22, 2:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 1:14 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 3:41 PM EDT | Special Weather Statement | RNK | 34 min |
| Sep 1, 4:56 PM EDT | Special Weather Statement | RNK | 79 min |
| Sep 21, 7:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 9:33 AM EDT | Special Weather Statement | RNK | 42 min |
| Oct 23, 2:42 PM EDT | Frost Advisory | RNK | 18 hr |
| Oct 24, 9:40 AM EDT | Freeze Watch | RNK | 23 hr |
| Oct 25, 3:52 AM EDT | Freeze Warning | RNK | 29 hr |
| Nov 1, 1:58 AM EDT | Special Weather Statement | RNK | 62 min |
| Nov 9, 10:50 PM EST | Fire Weather Watch | RNK | 10 hr |
| Nov 17, 3:06 AM EST | Dense Fog Advisory | RNK | 6 hr |
| Nov 25, 5:03 AM EST | Winter Weather Advisory | RNK | 34 hr |
| Dec 6, 5:09 AM EST | Winter Storm Watch | RNK | 25 hr |
| Dec 7, 5:45 AM EST | Winter Storm Warning | RNK | 51 hr |
| Dec 8, 11:05 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 9, 2:39 PM EST | Winter Weather Advisory | RNK | 21 hr |
| Dec 22, 3:23 AM EST | Flood Watch | RNK | 33 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 | 14 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 40 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 4 |
| Flood Watch | 3 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.