Alert archive / Virginia / Powhatan County
Weather alerts in Powhatan County, Virginia, 2008
95 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 95
- Warnings
- 16
- Watches
- 26
- Advisories
- 21
- Busiest month
- June23 alerts
- Busiest day
- June 4, 20085 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 1 tornado warnings covering Powhatan County in 2008 had a tornado report inside them.
Powhatan County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 6 | 4 | 33% | 1 | 100% | 16 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 22 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 70 | 20 | 71% | 65 | 60% | 11 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 288 | 138 | 52% | 333 | 73% | 22 min |
| NWS Wakefield, VA: flash flood warnings | 19 | 12 | 37% | 29 | 59% | 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 16, 4:32 AM EST | Winter Storm Watch | AKQ | 11 hr |
| Jan 16, 3:29 PM EST | Winter Weather Advisory | AKQ | 32 hr |
| Jan 19, 4:50 AM EST | Winter Weather Advisory | AKQ | 22 hr |
| Jan 21, 3:33 PM EST | Winter Weather Advisory | AKQ | 20 hr |
| Feb 9, 4:48 AM EST | Fire Weather Watch | AKQ | 12 hr |
| Feb 9, 3:49 PM EST | Wind Advisory | AKQ | 32 hr |
| Feb 9, 4:35 PM EST | Red Flag Warning | AKQ | 28 hr |
| Feb 12, 5:47 PM EST | Winter Weather Advisory | AKQ | 13 hr |
| Feb 13, 10:10 PM EST | Winter Weather Advisory | AKQ | 10 hr |
| Feb 21, 4:20 AM EST | Winter Storm Watch | AKQ | 12 hr |
| Feb 21, 4:07 PM EST | Winter Weather Advisory | AKQ | 23 hr |
| Feb 22, 12:40 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 29, 3:30 PM EST | Fire Weather Watch | AKQ | 13 hr |
| Mar 1, 4:30 AM EST | Red Flag Warning | AKQ | 16 hr |
| Mar 4, 5:53 PM EST | Tornado Watch | SPC | 9 hr |
| Mar 4, 8:09 PM EST | Severe Thunderstorm Warning | AKQ | 29 min |
| Mar 7, 3:00 PM EST | Wind Advisory | AKQ | 30 hr |
| Mar 8, 12:44 PM EST | Mesoscale Discussion | SPC | 61 min |
| Mar 19, 11:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Apr 15, 3:13 PM EDT | Freeze Warning | AKQ | 17 hr |
| Apr 16, 3:28 PM EDT | Frost Advisory | AKQ | 17 hr |
| Apr 20, 12:23 PM EDT | Flash Flood Watch | AKQ | 12 hr |
| Apr 20, 5:59 PM EDT | Areal Flood Advisory | AKQ | 4 hr |
| Apr 20, 7:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 8, 8:38 PM EDT | Tornado Watch | SPC | 6 hr |
| May 8, 9:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 9, 2:32 AM EDT | Mesoscale Discussion | SPC | 88 min |
| May 9, 4:49 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| May 11, 2:07 PM EDT | Tornado Watch | SPC | 6 hr |
| May 11, 6:12 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| May 16, 2:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 20, 12:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 20, 1:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 31, 12:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 31, 3:07 PM EDT | Tornado Watch | SPC | 6 hr |
| May 31, 3:57 PM EDT | Severe Thunderstorm Warning | AKQ | 63 min |
| Jun 1, 6:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 3, 6:09 PM EDT | Severe Thunderstorm Warning | AKQ | 33 min |
| Jun 4, 12:18 AM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 4, 2:26 AM EDT | Tornado Watch | SPC | 6 hr |
| Jun 4, 7:23 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 4, 12:49 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 4, 7:34 PM EDT | Tornado Watch | SPC | 5 hr |
| Jun 5, 4:12 AM EDT | Heat Advisory | AKQ | 16 hr |
| Jun 6, 3:35 AM EDT | Heat Advisory | AKQ | 16 hr |
| Jun 6, 2:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 3:13 PM EDT | Heat Advisory | AKQ | 4 days |
| Jun 10, 2:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 14, 12:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 16, 12:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 4:35 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 16, 5:47 PM EDT | Severe Thunderstorm Warning | AKQ | 33 min |
| Jun 16, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 27, 11:37 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 12:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 29, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 9:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 7:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 4, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 5, 9:02 PM EDT | Areal Flood Advisory | AKQ | 118 min |
| Jul 6, 8:54 PM EDT | Tornado Warning | AKQ | 35 min |
| Jul 7, 7:06 PM EDT | Severe Thunderstorm Warning | AKQ | 39 min |
| Jul 8, 2:46 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 12:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 8, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 8, 3:34 PM EDT | Severe Thunderstorm Warning | AKQ | 56 min |
| Jul 9, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 9, 6:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 23, 12:44 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 2:10 PM EDT | Flash Flood Watch | AKQ | 16 hr |
| Jul 23, 3:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 23, 8:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 27, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 1:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 4:05 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 2, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 15, 12:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 15, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 28, 8:34 AM EDT | Areal Flood Advisory | AKQ | 116 min |
| Sep 5, 4:19 AM EDT | Flash Flood Watch | AKQ | 36 hr |
| Sep 6, 11:37 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Sep 6, 2:20 PM EDT | River Flood Warning | AKQ | 115 min |
| Sep 9, 1:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Sep 26, 9:38 PM EDT | Flash Flood Warning | AKQ | 77 min |
| Oct 19, 4:17 AM EDT | Freeze Warning | AKQ | 29 hr |
| Oct 22, 3:21 PM EDT | Freeze Warning | AKQ | 17 hr |
| Oct 29, 3:39 PM EDT | Freeze Warning | AKQ | 17 hr |
| Nov 15, 11:07 AM EST | Mesoscale Discussion | SPC | 53 min |
| Nov 15, 12:22 PM EST | Tornado Watch | SPC | 7 hr |
| Dec 6, 6:04 PM EST | Winter Weather Advisory | AKQ | 3 hr |
| Dec 10, 3:30 PM EST | Flood Watch | AKQ | 33 hr |
| Dec 18, 8:06 PM EST | Dense Fog Advisory | AKQ | 13 hr |
| Dec 31, 4:43 AM EST | Wind Advisory | AKQ | 17 hr |
| Dec 31, 11:17 AM EST | Red Flag Warning | AKQ | 7 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 | 6 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 32 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.