Alert archive / Virginia / Powhatan County
Weather alerts in Powhatan County, Virginia, 2010
132 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Powhatan County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 132
- Warnings
- 32
- Watches
- 23
- Advisories
- 18
- Busiest month
- August29 alerts
- Busiest day
- October 27, 201012 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 2 tornado warnings covering Powhatan County in 2010 had a tornado report inside them.
Powhatan County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 23 | 20 | 13% | 11 | 91% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 50 | 6 | 88% | 16 | 56% | 19 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 170 | 133 | 22% | 362 | 82% | 23 min |
| NWS Wakefield, VA: flash flood warnings | 11 | 9 | 18% | 18 | 89% | 94 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, 1:15 AM EST | Dense Fog Advisory | AKQ | 8 hr |
| Jan 25, 12:01 PM EST | River Flood Warning | AKQ | 60 hr |
| Jan 28, 3:56 AM EST | Winter Storm Watch | AKQ | 36 hr |
| Jan 29, 4:04 AM EST | Winter Storm Warning | AKQ | 48 hr |
| Jan 30, 3:56 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 30, 8:10 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 3, 3:59 PM EST | Winter Storm Watch | AKQ | 37 hr |
| Feb 4, 4:04 PM EST | Winter Storm Warning | AKQ | 50 hr |
| Feb 5, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 8, 3:34 PM EST | Winter Storm Watch | AKQ | 12 hr |
| Feb 9, 3:26 AM EST | Winter Weather Advisory | AKQ | 43 hr |
| Feb 9, 2:41 PM EST | Wind Advisory | AKQ | 32 hr |
| Feb 24, 3:28 PM EST | Winter Weather Advisory | AKQ | 21 hr |
| Feb 25, 4:08 AM EST | Wind Advisory | AKQ | 37 hr |
| Mar 12, 4:35 AM EST | Flood Watch | AKQ | 24 hr |
| Mar 22, 12:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 28, 11:06 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Mar 29, 10:28 AM EDT | River Flood Warning | AKQ | 24 hr |
| Apr 5, 6:17 PM EDT | Severe Thunderstorm Warning | AKQ | 50 min |
| Apr 8, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Apr 8, 7:12 PM EDT | Tornado Watch | SPC | 3 hr |
| Apr 8, 8:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 5:00 AM EDT | Dense Fog Advisory | AKQ | 114 min |
| Apr 26, 6:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 12, 1:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 12, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 12, 4:07 PM EDT | Severe Thunderstorm Warning | AKQ | 68 min |
| May 14, 8:56 PM EDT | Severe Thunderstorm Warning | AKQ | 34 min |
| May 14, 9:26 PM EDT | Severe Thunderstorm Warning | AKQ | 34 min |
| May 14, 9:52 PM EDT | Severe Thunderstorm Warning | AKQ | 38 min |
| May 23, 1:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 23, 5:48 PM EDT | Special Weather Statement | AKQ | 57 min |
| Jun 1, 4:42 PM EDT | Special Weather Statement | AKQ | 63 min |
| Jun 3, 5:45 PM EDT | Severe Thunderstorm Warning | AKQ | 60 min |
| Jun 3, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 3, 10:10 PM EDT | Special Weather Statement | AKQ | 50 min |
| Jun 12, 2:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 12, 3:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 12, 3:16 PM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| Jun 12, 4:06 PM EDT | Special Weather Statement | AKQ | 54 min |
| Jun 12, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 12, 4:29 PM EDT | Severe Thunderstorm Warning | AKQ | 46 min |
| Jun 23, 2:30 PM EDT | Heat Advisory | AKQ | 30 hr |
| Jun 24, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 24, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 6:17 PM EDT | Special Weather Statement | AKQ | 58 min |
| Jun 28, 4:20 PM EDT | Special Weather Statement | AKQ | 55 min |
| Jun 28, 6:28 PM EDT | Special Weather Statement | AKQ | 62 min |
| Jun 28, 7:35 PM EDT | Special Weather Statement | AKQ | 55 min |
| Jul 8, 3:15 PM EDT | Special Weather Statement | AKQ | 45 min |
| Jul 13, 4:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 13, 6:36 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 13, 11:24 PM EDT | Special Weather Statement | AKQ | 66 min |
| Jul 16, 5:11 PM EDT | Severe Thunderstorm Warning | AKQ | 49 min |
| Jul 17, 10:29 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 7:31 PM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| Jul 19, 11:37 AM EDT | Special Weather Statement | AKQ | 53 min |
| Jul 20, 12:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 20, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 6:06 PM EDT | Special Weather Statement | AKQ | 54 min |
| Jul 22, 3:18 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 23, 2:57 PM EDT | Heat Advisory | AKQ | 29 hr |
| Jul 24, 3:44 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 25, 1:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 29, 11:36 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 29, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 5:07 PM EDT | Special Weather Statement | AKQ | 53 min |
| Aug 4, 4:04 PM EDT | Heat Advisory | AKQ | 27 hr |
| Aug 4, 5:30 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Aug 4, 5:52 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 7:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 4, 8:10 PM EDT | Severe Thunderstorm Warning | AKQ | 65 min |
| Aug 4, 9:15 PM EDT | Severe Thunderstorm Warning | AKQ | 30 min |
| Aug 5, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 5, 4:42 PM EDT | Special Weather Statement | AKQ | 63 min |
| Aug 5, 4:54 PM EDT | Severe Thunderstorm Warning | AKQ | 36 min |
| Aug 5, 5:04 PM EDT | Severe Thunderstorm Warning | AKQ | 56 min |
| Aug 5, 5:25 PM EDT | Severe Thunderstorm Warning | AKQ | 35 min |
| Aug 5, 5:53 PM EDT | Severe Thunderstorm Warning | AKQ | 52 min |
| Aug 5, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 11, 3:08 PM EDT | Special Weather Statement | AKQ | 52 min |
| Aug 12, 10:34 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 12, 12:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 12, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 12, 4:51 PM EDT | Special Weather Statement | AKQ | 54 min |
| Aug 12, 4:58 PM EDT | Severe Thunderstorm Warning | AKQ | 47 min |
| Aug 12, 5:12 PM EDT | Severe Thunderstorm Warning | AKQ | 33 min |
| Aug 12, 6:20 PM EDT | Special Weather Statement | AKQ | 55 min |
| Aug 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 17, 4:02 PM EDT | Special Weather Statement | AKQ | 58 min |
| Aug 18, 4:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 18, 5:04 PM EDT | Special Weather Statement | AKQ | 56 min |
| Aug 22, 4:12 PM EDT | Special Weather Statement | AKQ | 63 min |
| Aug 26, 3:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 29, 4:41 AM EDT | Flash Flood Watch | AKQ | 47 hr |
| Sep 30, 3:01 AM EDT | Areal Flood Advisory | AKQ | 89 min |
| Sep 30, 6:20 PM EDT | Areal Flood Advisory | AKQ | 4 hr |
| Oct 22, 3:21 PM EDT | Frost Advisory | AKQ | 17 hr |
| Oct 27, 2:44 AM EDT | Tornado Watch | SPC | 7 hr |
| Oct 27, 5:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 27, 11:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 27, 12:13 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 27, 3:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Oct 27, 3:42 PM EDT | Severe Thunderstorm Warning | AKQ | 48 min |
| Oct 27, 3:53 PM EDT | Tornado Warning | AKQ | 37 min |
| Oct 27, 4:23 PM EDT | Tornado Warning | AKQ | 37 min |
| Oct 27, 7:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Oct 27, 7:18 PM EDT | Special Weather Statement | AKQ | 57 min |
| Oct 27, 7:34 PM EDT | Severe Thunderstorm Warning | AKQ | 41 min |
| Oct 27, 7:46 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 27, 9:15 PM EDT | Special Weather Statement | AKQ | 60 min |
| Oct 29, 4:06 AM EDT | Freeze Warning | AKQ | 28 hr |
| Nov 16, 8:47 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 16, 11:27 PM EST | Severe Thunderstorm Warning | AKQ | 48 min |
| Nov 16, 11:27 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 22, 2:30 AM EST | Dense Fog Advisory | AKQ | 7 hr |
| Dec 1, 12:48 AM EST | Mesoscale Discussion | SPC | 117 min |
| Dec 1, 2:13 AM EST | Tornado Watch | SPC | 8 hr |
| Dec 1, 3:52 AM EST | Severe Thunderstorm Warning | AKQ | 53 min |
| Dec 1, 4:25 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 1, 4:45 AM EST | Severe Thunderstorm Warning | AKQ | 45 min |
| Dec 4, 2:09 PM EST | Winter Weather Advisory | AKQ | 14 hr |
| Dec 13, 5:55 AM EST | Winter Weather Advisory | AKQ | 4 hr |
| Dec 15, 10:51 AM EST | Winter Storm Watch | AKQ | 4 hr |
| Dec 15, 3:11 PM EST | Winter Storm Warning | AKQ | 28 hr |
| Dec 24, 3:51 PM EST | Winter Storm Watch | AKQ | 24 hr |
| Dec 25, 12:02 PM EST | Winter Storm Warning | AKQ | 39 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 | 23 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 37 |
| Special Weather Statement | 22 |
| Flooding | |
| River Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.