Alert archive / Virginia / Northumberland County
Weather alerts in Northumberland County, Virginia, 2017
131 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 131
- Warnings
- 20
- Watches
- 11
- Advisories
- 19
- Busiest month
- July24 alerts
- Busiest day
- April 6, 20177 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 2017 had a tornado report inside them.
Northumberland County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 14 | 7 | 50% | 2 | 50% | 27 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 6 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 35 | 8 | 77% | 25 | 68% | 14 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 183 | 103 | 44% | 289 | 79% | 19 min |
| NWS Wakefield, VA: flash flood warnings | 7 | 5 | 29% | 5 | 100% | 46 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 5, 10:20 AM EST | Winter Storm Watch | AKQ | 17 hr |
| Jan 6, 3:45 AM EST | Winter Storm Warning | AKQ | 39 hr |
| Jan 6, 3:45 AM EST | Winter Weather Advisory | AKQ | 54 hr |
| Jan 7, 8:11 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 23, 6:51 AM EST | Coastal Flood Advisory | AKQ | 29 hr |
| Feb 9, 8:56 AM EST | Special Weather Statement | AKQ | 34 min |
| Feb 9, 4:40 PM EST | Special Weather Statement | AKQ | 95 min |
| Feb 9, 5:41 PM EST | Special Weather Statement | AKQ | 64 min |
| Feb 25, 12:24 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 25, 1:30 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 25, 4:24 PM EST | Special Weather Statement | AKQ | 36 min |
| Feb 25, 4:26 PM EST | Mesoscale Discussion | SPC | 94 min |
| Mar 1, 12:50 PM EST | Mesoscale Discussion | SPC | 55 min |
| Mar 1, 1:13 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 1, 2:07 PM EST | Severe Thunderstorm Warning | AKQ | 38 min |
| Mar 1, 2:50 PM EST | Mesoscale Discussion | SPC | 55 min |
| Mar 1, 2:52 PM EST | Special Weather Statement | AKQ | 23 min |
| Mar 8, 6:16 AM EST | Special Weather Statement | AKQ | 59 min |
| Mar 13, 3:27 PM EDT | Wind Advisory | AKQ | 22 hr |
| Mar 14, 5:32 AM EDT | Special Weather Statement | AKQ | 58 min |
| Mar 28, 4:42 PM EDT | Special Weather Statement | AKQ | 48 min |
| Apr 6, 5:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 6, 7:06 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 6, 10:38 AM EDT | Mesoscale Discussion | SPC | 67 min |
| Apr 6, 12:04 PM EDT | Severe Thunderstorm Warning | AKQ | 41 min |
| Apr 6, 12:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 6, 1:07 PM EDT | Special Weather Statement | AKQ | 38 min |
| Apr 6, 1:48 PM EDT | Special Weather Statement | AKQ | 12 min |
| Apr 6, 10:07 PM EDT | Coastal Flood Advisory | AKQ | 5 hr |
| Apr 15, 9:11 PM EDT | Special Weather Statement | AKQ | 19 min |
| Apr 20, 8:30 PM EDT | Special Weather Statement | AKQ | 60 min |
| Apr 21, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 21, 7:54 PM EDT | Severe Thunderstorm Warning | AKQ | 36 min |
| Apr 21, 8:14 PM EDT | Tornado Warning | AKQ | 16 min |
| Apr 21, 8:32 PM EDT | Severe Thunderstorm Warning | AKQ | 28 min |
| Apr 24, 5:05 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| Apr 25, 4:29 AM EDT | Coastal Flood Statement | AKQ | 12 hr |
| Apr 25, 4:44 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 5, 8:28 AM EDT | Severe Thunderstorm Warning | AKQ | 33 min |
| May 5, 8:40 AM EDT | Severe Thunderstorm Warning | AKQ | 50 min |
| May 11, 6:04 PM EDT | Coastal Flood Statement | AKQ | 24 hr |
| May 12, 5:54 PM EDT | Coastal Flood Advisory | AKQ | 14 hr |
| May 19, 6:37 PM EDT | Severe Thunderstorm Warning | AKQ | 38 min |
| May 24, 5:41 PM EDT | Coastal Flood Statement | AKQ | 9 hr |
| May 25, 5:03 AM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 25, 12:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 25, 4:30 PM EDT | Special Weather Statement | AKQ | 45 min |
| May 25, 4:58 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 25, 4:58 PM EDT | Coastal Flood Advisory | AKQ | 11 hr |
| May 27, 6:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 28, 9:53 PM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 29, 4:39 PM EDT | Coastal Flood Statement | AKQ | 14 hr |
| May 29, 7:02 PM EDT | Special Weather Statement | AKQ | 43 min |
| May 29, 7:09 PM EDT | Severe Thunderstorm Warning | AKQ | 39 min |
| May 29, 7:50 PM EDT | Special Weather Statement | AKQ | 40 min |
| May 30, 10:17 AM EDT | Coastal Flood Statement | AKQ | 10 hr |
| May 30, 9:59 PM EDT | Special Weather Statement | AKQ | 46 min |
| May 31, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 6:41 PM EDT | Coastal Flood Statement | AKQ | 31 hr |
| Jun 17, 2:44 PM EDT | Special Weather Statement | AKQ | 61 min |
| Jun 19, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 12:48 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 6:42 PM EDT | Severe Thunderstorm Warning | AKQ | 48 min |
| Jun 19, 7:02 PM EDT | Special Weather Statement | AKQ | 43 min |
| Jul 1, 9:15 PM EDT | Special Weather Statement | AKQ | 45 min |
| Jul 1, 9:59 PM EDT | Special Weather Statement | AKQ | 46 min |
| Jul 6, 6:14 AM EDT | Special Weather Statement | AKQ | 46 min |
| Jul 6, 8:44 PM EDT | Severe Thunderstorm Warning | AKQ | 46 min |
| Jul 12, 3:40 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 13, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 14, 7:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 14, 7:04 PM EDT | Special Weather Statement | AKQ | 41 min |
| Jul 14, 7:45 PM EDT | Special Weather Statement | AKQ | 30 min |
| Jul 20, 3:46 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 21, 3:51 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 22, 7:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 7:45 PM EDT | Severe Thunderstorm Warning | AKQ | 60 min |
| Jul 22, 8:44 PM EDT | Special Weather Statement | AKQ | 31 min |
| Jul 23, 12:29 AM EDT | Special Weather Statement | AKQ | 46 min |
| Jul 27, 3:20 PM EDT | Flash Flood Watch | AKQ | 42 hr |
| Jul 28, 5:12 PM EDT | Special Weather Statement | AKQ | 33 min |
| Jul 28, 5:44 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 28, 5:51 PM EDT | Special Weather Statement | AKQ | 24 min |
| Jul 28, 6:19 PM EDT | Special Weather Statement | AKQ | 41 min |
| Jul 28, 6:34 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Jul 28, 6:52 PM EDT | Special Weather Statement | AKQ | 53 min |
| Jul 29, 3:54 PM EDT | Coastal Flood Advisory | AKQ | 32 hr |
| Jul 31, 3:38 AM EDT | Coastal Flood Statement | AKQ | 9 hr |
| Aug 7, 3:32 AM EDT | Flash Flood Watch | AKQ | 18 hr |
| Aug 7, 12:16 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 4:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 7, 5:22 PM EDT | Special Weather Statement | AKQ | 53 min |
| Aug 15, 12:54 PM EDT | Special Weather Statement | AKQ | 51 min |
| Aug 15, 12:58 PM EDT | Severe Thunderstorm Warning | AKQ | 47 min |
| Aug 15, 1:20 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 15, 1:34 PM EDT | Severe Thunderstorm Warning | AKQ | 41 min |
| Aug 15, 1:45 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 18, 2:27 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 18, 7:53 PM EDT | Severe Thunderstorm Warning | AKQ | 52 min |
| Aug 18, 8:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 28, 3:36 AM EDT | Flash Flood Watch | AKQ | 41 hr |
| Aug 28, 2:58 PM EDT | Wind Advisory | AKQ | 33 hr |
| Aug 28, 5:59 PM EDT | Coastal Flood Watch | AKQ | 12 hr |
| Aug 28, 5:59 PM EDT | Coastal Flood Advisory | AKQ | 40 hr |
| Aug 30, 5:25 PM EDT | Coastal Flood Statement | AKQ | 7 hr |
| Aug 31, 6:10 AM EDT | Coastal Flood Statement | AKQ | 6 hr |
| Sep 1, 7:18 PM EDT | Special Weather Statement | AKQ | 42 min |
| Sep 1, 8:00 PM EDT | Special Weather Statement | AKQ | 60 min |
| Sep 2, 4:59 AM EDT | Coastal Flood Statement | AKQ | 9 hr |
| Sep 2, 4:44 PM EDT | Special Weather Statement | AKQ | 61 min |
| Sep 2, 5:17 PM EDT | Coastal Flood Statement | AKQ | 8 hr |
| Sep 2, 5:44 PM EDT | Special Weather Statement | AKQ | 61 min |
| Sep 5, 10:14 PM EDT | Special Weather Statement | AKQ | 46 min |
| Sep 18, 5:50 PM EDT | Coastal Flood Advisory | AKQ | 4 days |
| Sep 23, 6:27 AM EDT | Coastal Flood Advisory | AKQ | 25 hr |
| Sep 26, 4:31 AM EDT | Coastal Flood Statement | AKQ | 11 hr |
| Sep 27, 4:03 AM EDT | Coastal Flood Statement | AKQ | 7 hr |
| Oct 11, 4:48 AM EDT | Special Weather Statement | AKQ | 42 min |
| Oct 12, 4:48 AM EDT | Coastal Flood Statement | AKQ | 37 hr |
| Oct 12, 4:53 PM EDT | Coastal Flood Advisory | AKQ | 31 hr |
| Oct 24, 3:37 PM EDT | Coastal Flood Statement | AKQ | 3 hr |
| Nov 5, 3:10 AM EST | Coastal Flood Statement | AKQ | 13 hr |
| Nov 6, 4:15 AM EST | Coastal Flood Statement | AKQ | 14 hr |
| Nov 6, 8:21 PM EST | Special Weather Statement | AKQ | 39 min |
| Nov 7, 8:22 PM EST | Coastal Flood Advisory | AKQ | 50 hr |
| Nov 9, 3:33 AM EST | Freeze Watch | AKQ | 24 hr |
| Nov 10, 3:18 AM EST | Freeze Warning | AKQ | 31 hr |
| Dec 8, 6:06 AM EST | Winter Weather Advisory | AKQ | 40 hr |
| Dec 8, 2:52 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 8, 3:09 PM EST | Winter Storm Warning | AKQ | 28 hr |
| Dec 12, 7:20 PM EST | Special Weather Statement | AKQ | 70 min |
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 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 39 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 3 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind and dust | |
| Wind Advisory | 2 |
| Coast and beach | |
| Coastal Flood Watch | 1 |
| Coastal Flood Advisory | 10 |
| Coastal Flood Statement | 22 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.