Alert archive / Virginia / Northumberland County
Weather alerts in Northumberland County, Virginia, 2012
124 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Northumberland County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 124
- Warnings
- 20
- Watches
- 18
- Advisories
- 21
- Busiest month
- June30 alerts
- Busiest day
- September 18, 20128 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 Northumberland County in 2012 had a tornado report inside them.
Northumberland County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 5 | 44% | 2 | 50% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 23 | 7 | 70% | 18 | 56% | 16 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 180 | 120 | 33% | 288 | 83% | 24 min |
| NWS Wakefield, VA: flash flood warnings | 8 | 5 | 38% | 21 | 62% | 53 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 |
|---|---|---|---|
| Feb 11, 4:45 PM EST | Special Weather Statement | AKQ | 45 min |
| Feb 11, 5:42 PM EST | Special Weather Statement | AKQ | 33 min |
| Feb 16, 10:10 PM EST | Dense Fog Advisory | AKQ | 11 hr |
| Feb 19, 2:39 AM EST | Winter Weather Advisory | AKQ | 26 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, 3:29 PM EST | Special Weather Statement | AKQ | 41 min |
| Feb 24, 4:45 PM EST | Mesoscale Discussion | SPC | 90 min |
| Feb 24, 5:20 PM EST | Special Weather Statement | AKQ | 55 min |
| Feb 29, 11:45 AM EST | Special Weather Statement | AKQ | 60 min |
| Feb 29, 9:03 PM EST | Special Weather Statement | AKQ | 102 min |
| Mar 4, 3:18 PM EST | Winter Weather Advisory | AKQ | 23 hr |
| Mar 20, 5:15 AM EDT | Dense Fog Advisory | AKQ | 4 hr |
| Mar 21, 9:42 PM EDT | Dense Fog Advisory | AKQ | 12 hr |
| Mar 24, 2:27 PM EDT | Special Weather Statement | AKQ | 63 min |
| Mar 28, 8:52 PM EDT | Severe Thunderstorm Warning | AKQ | 38 min |
| Apr 6, 4:09 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| Apr 8, 7:38 PM EDT | Red Flag Warning | AKQ | 24 hr |
| Apr 9, 10:30 AM EDT | Fire Weather Watch | AKQ | 9 hr |
| Apr 9, 3:53 PM EDT | Red Flag Warning | AKQ | 28 hr |
| May 15, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 1, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 1, 1:50 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 3:02 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Jun 1, 3:44 PM EDT | Tornado Warning | AKQ | 31 min |
| Jun 1, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 1, 4:16 PM EDT | Severe Thunderstorm Warning | AKQ | 29 min |
| Jun 1, 6:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 8:01 PM EDT | Tornado Watch | SPC | 4 hr |
| Jun 4, 7:03 AM EDT | Coastal Flood Statement | AKQ | 18 hr |
| Jun 5, 4:42 AM EDT | Coastal Flood Statement | AKQ | 17 hr |
| Jun 5, 4:42 AM EDT | Coastal Flood Advisory | AKQ | 26 hr |
| Jun 6, 10:45 AM EDT | Coastal Flood Statement | AKQ | 7 hr |
| Jun 6, 5:56 PM EDT | Coastal Flood Advisory | AKQ | 14 hr |
| Jun 22, 12:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 1:22 PM EDT | Special Weather Statement | AKQ | 53 min |
| Jun 22, 1:51 PM EDT | Severe Thunderstorm Warning | AKQ | 39 min |
| Jun 22, 2:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 2:33 PM EDT | Special Weather Statement | AKQ | 57 min |
| Jun 22, 4:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 6:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 25, 10:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 25, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 1:18 PM EDT | Special Weather Statement | AKQ | 42 min |
| Jun 25, 3:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 29, 3:51 AM EDT | Heat Advisory | AKQ | 13 hr |
| Jun 29, 1:18 PM EDT | Excessive Heat Warning | AKQ | 26 hr |
| Jun 29, 10:09 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 29, 10:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 29, 11:09 PM EDT | Severe Thunderstorm Warning | AKQ | 81 min |
| Jun 30, 7:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 2, 6:36 AM EDT | Special Weather Statement | AKQ | 54 min |
| Jul 4, 3:15 PM EDT | Heat Advisory | AKQ | 29 hr |
| Jul 5, 3:29 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 6, 10:05 AM EDT | Excessive Heat Watch | AKQ | 17 hr |
| Jul 7, 3:19 AM EDT | Excessive Heat Watch | AKQ | 24 hr |
| Jul 7, 3:19 AM EDT | Excessive Heat Warning | AKQ | 17 hr |
| Jul 8, 2:53 AM EDT | Heat Advisory | AKQ | 17 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, 6:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 8, 6:44 PM EDT | Severe Thunderstorm Warning | AKQ | 20 min |
| Jul 14, 3:52 PM EDT | Areal Flood Advisory | AKQ | 98 min |
| Jul 15, 4:09 PM EDT | Special Weather Statement | AKQ | 66 min |
| Jul 15, 4:37 PM EDT | Severe Thunderstorm Warning | AKQ | 38 min |
| Jul 17, 3:07 PM EDT | Heat Advisory | AKQ | 29 hr |
| Jul 18, 3:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 24, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 1:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 3:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 25, 4:05 PM EDT | Heat Advisory | AKQ | 27 hr |
| Jul 26, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 9:31 PM EDT | Heat Advisory | AKQ | 21 hr |
| Jul 27, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 28, 4:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 31, 3:45 AM EDT | Special Weather Statement | AKQ | 60 min |
| Jul 31, 5:48 PM EDT | Special Weather Statement | AKQ | 57 min |
| Aug 2, 5:25 PM EDT | Special Weather Statement | AKQ | 35 min |
| Aug 2, 5:30 PM EDT | Severe Thunderstorm Warning | AKQ | 30 min |
| Aug 2, 6:27 PM EDT | Areal Flood Advisory | AKQ | 93 min |
| Aug 8, 5:59 PM EDT | Special Weather Statement | AKQ | 31 min |
| Aug 8, 6:31 PM EDT | Special Weather Statement | AKQ | 29 min |
| Aug 10, 8:21 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 6:32 AM EDT | Special Weather Statement | AKQ | 58 min |
| Aug 11, 3:52 PM EDT | Special Weather Statement | AKQ | 23 min |
| Aug 11, 4:21 PM EDT | Special Weather Statement | AKQ | 24 min |
| Aug 15, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 25, 11:22 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 26, 2:23 PM EDT | Special Weather Statement | AKQ | 52 min |
| Aug 26, 6:09 PM EDT | Special Weather Statement | AKQ | 66 min |
| Aug 27, 2:56 AM EDT | Special Weather Statement | AKQ | 64 min |
| Sep 2, 1:21 PM EDT | Special Weather Statement | AKQ | 54 min |
| Sep 2, 2:19 PM EDT | Special Weather Statement | AKQ | 56 min |
| Sep 6, 11:55 AM EDT | Special Weather Statement | AKQ | 65 min |
| Sep 8, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 8, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 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, 12:01 PM EDT | Special Weather Statement | AKQ | 29 min |
| Sep 18, 12:21 PM EDT | Severe Thunderstorm Warning | AKQ | 39 min |
| Sep 18, 1:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Sep 18, 3:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 18, 4:41 PM EDT | Special Weather Statement | AKQ | 64 min |
| Sep 18, 5:46 PM EDT | Special Weather Statement | AKQ | 49 min |
| Sep 28, 5:30 PM EDT | Special Weather Statement | AKQ | 60 min |
| Sep 28, 9:37 PM EDT | Special Weather Statement | AKQ | 23 min |
| Oct 26, 4:00 PM EDT | Flood Watch | AKQ | 3 days |
| Oct 26, 5:31 PM EDT | High Wind Watch | AKQ | 35 hr |
| Oct 27, 5:18 PM EDT | High Wind Warning | AKQ | 59 hr |
| Oct 27, 5:18 PM EDT | Wind Advisory | AKQ | 59 hr |
| Oct 27, 5:33 PM EDT | Coastal Flood Warning | AKQ | 4 days |
| Oct 28, 1:18 PM EDT | Areal Flood Warning | AKQ | 6 hr |
| Oct 29, 3:21 PM EDT | Coastal Flood Advisory | AKQ | 9 hr |
| Oct 29, 6:13 PM EDT | Areal Flood Warning | AKQ | 6 hr |
| Oct 29, 6:45 PM EDT | Areal Flood Warning | AKQ | 6 hr |
| Nov 5, 3:50 PM EST | Freeze Warning | AKQ | 16 hr |
| Dec 2, 1:01 AM EST | Dense Fog Advisory | AKQ | 8 hr |
| Dec 9, 7:04 PM EST | Dense Fog Advisory | AKQ | 14 hr |
| Dec 21, 12:24 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 21, 7:58 AM EST | Coastal Flood Advisory | AKQ | 3 hr |
| Dec 21, 2:20 PM EST | Wind Advisory | AKQ | 25 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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 31 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Advisory | 4 |
| Coastal Flood Statement | 4 |
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.