Alert archive / Virginia / Henrico County
Weather alerts in Henrico County, Virginia, 2019
158 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Henrico County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 158
- Warnings
- 36
- Watches
- 14
- Advisories
- 35
- Busiest month
- August38 alerts
- Busiest day
- June 7, 20198 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Henrico County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 23 | 21 | 9% | 10 | 70% | 19 min |
| Flash flood warnings | 4 | 4 | 0% | 3 | 100% | 18 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 59 | 15 | 75% | 28 | 82% | 13 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 327 | 237 | 28% | 509 | 86% | 20 min |
| NWS Wakefield, VA: flash flood warnings | 18 | 13 | 28% | 33 | 82% | 92 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, 3:36 AM EST | Winter Storm Watch | AKQ | 24 hr |
| Jan 11, 9:59 PM EST | Winter Storm Warning | AKQ | 51 hr |
| Jan 12, 3:46 AM EST | Winter Weather Advisory | AKQ | 48 hr |
| Jan 20, 3:29 AM EST | Wind Chill Advisory | AKQ | 32 hr |
| Jan 30, 3:46 AM EST | Wind Advisory | AKQ | 14 hr |
| Feb 7, 8:29 PM EST | Dense Fog Advisory | AKQ | 8 hr |
| Feb 19, 3:36 AM EST | Winter Weather Advisory | AKQ | 42 hr |
| Feb 22, 7:33 AM EST | River Flood Warning | AKQ | 21 days |
| Feb 22, 11:04 AM EST | River Flood Warning | AKQ | 5 days |
| Mar 19, 10:03 AM EDT | Special Weather Statement | AKQ | 12 min |
| Mar 21, 12:38 PM EDT | Special Weather Statement | AKQ | 37 min |
| Mar 21, 1:18 PM EDT | Special Weather Statement | AKQ | 42 min |
| Mar 22, 7:30 AM EDT | River Flood Warning | AKQ | 33 hr |
| Mar 22, 2:56 PM EDT | River Flood Warning | AKQ | 16 hr |
| Mar 22, 5:54 PM EDT | Special Weather Statement | AKQ | 36 min |
| Apr 8, 2:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 8, 5:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 8, 6:24 PM EDT | Severe Thunderstorm Warning | AKQ | 30 min |
| Apr 8, 7:01 PM EDT | Special Weather Statement | AKQ | 44 min |
| Apr 14, 5:49 PM EDT | Mesoscale Discussion | SPC | 26 min |
| Apr 15, 12:07 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 15, 12:41 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 15, 1:28 AM EDT | Special Weather Statement | AKQ | 47 min |
| Apr 15, 1:28 AM EDT | Severe Thunderstorm Warning | AKQ | 47 min |
| Apr 15, 1:50 AM EDT | Severe Thunderstorm Warning | AKQ | 40 min |
| Apr 15, 2:30 AM EDT | Mesoscale Discussion | SPC | 60 min |
| Apr 16, 8:32 AM EDT | River Flood Warning | AKQ | 7 hr |
| Apr 19, 8:26 AM EDT | Flash Flood Watch | AKQ | 20 hr |
| Apr 19, 12:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 1:12 PM EDT | Severe Thunderstorm Warning | AKQ | 48 min |
| Apr 19, 1:17 PM EDT | Tornado Watch | SPC | 11 hr |
| Apr 19, 1:37 PM EDT | Severe Thunderstorm Warning | AKQ | 21 min |
| Apr 19, 3:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Apr 19, 6:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 20, 3:55 PM EDT | River Flood Warning | AKQ | 44 hr |
| Apr 26, 7:41 AM EDT | Special Weather Statement | AKQ | 49 min |
| Apr 26, 11:37 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 26, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 26, 3:09 PM EDT | Special Weather Statement | AKQ | 51 min |
| Apr 26, 3:12 PM EDT | Special Weather Statement | AKQ | 48 min |
| Apr 26, 3:24 PM EDT | Severe Thunderstorm Warning | AKQ | 33 min |
| May 5, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 5, 4:04 PM EDT | Special Weather Statement | AKQ | 56 min |
| May 5, 4:38 PM EDT | Special Weather Statement | AKQ | 52 min |
| May 8, 4:13 PM EDT | Special Weather Statement | AKQ | 32 min |
| May 11, 3:11 PM EDT | Special Weather Statement | AKQ | 49 min |
| May 13, 6:38 AM EDT | Special Weather Statement | AKQ | 37 min |
| May 17, 10:29 PM EDT | Special Weather Statement | AKQ | 31 min |
| May 17, 10:59 PM EDT | Special Weather Statement | AKQ | 31 min |
| May 26, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 5:37 PM EDT | Special Weather Statement | AKQ | 23 min |
| May 26, 5:59 PM EDT | Special Weather Statement | AKQ | 31 min |
| May 29, 6:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 31, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 31, 8:18 PM EDT | Severe Thunderstorm Warning | AKQ | 42 min |
| May 31, 8:37 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| May 31, 8:53 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| May 31, 8:57 PM EDT | Severe Thunderstorm Warning | AKQ | 48 min |
| May 31, 9:16 PM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| May 31, 11:31 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 1, 5:52 AM EDT | Special Weather Statement | AKQ | 38 min |
| Jun 2, 5:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 5, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 5, 2:33 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 5, 3:28 PM EDT | Special Weather Statement | AKQ | 47 min |
| Jun 5, 4:02 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Jun 7, 11:46 AM EDT | Areal Flood Advisory | AKQ | 119 min |
| Jun 7, 11:52 AM EDT | Areal Flood Advisory | AKQ | 113 min |
| Jun 7, 12:34 PM EDT | Special Weather Statement | AKQ | 41 min |
| Jun 7, 12:48 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 7, 1:43 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Jun 7, 1:54 PM EDT | Flash Flood Warning | AKQ | 6 hr |
| Jun 7, 2:08 PM EDT | Flash Flood Warning | AKQ | 6 hr |
| Jun 7, 2:31 PM EDT | Areal Flood Advisory | AKQ | 5 hr |
| Jun 10, 1:47 PM EDT | Areal Flood Advisory | AKQ | 118 min |
| Jun 10, 6:14 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Jun 18, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 20, 12:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 20, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 8:08 PM EDT | Special Weather Statement | AKQ | 37 min |
| Jul 3, 8:18 PM EDT | Special Weather Statement | AKQ | 27 min |
| Jul 3, 8:46 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jul 4, 4:53 PM EDT | Special Weather Statement | AKQ | 52 min |
| Jul 4, 5:47 PM EDT | Special Weather Statement | AKQ | 58 min |
| Jul 4, 5:57 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 3:44 PM EDT | Flash Flood Watch | AKQ | 5 hr |
| Jul 7, 6:02 PM EDT | Areal Flood Advisory | AKQ | 118 min |
| Jul 7, 6:37 PM EDT | Areal Flood Advisory | AKQ | 113 min |
| Jul 11, 5:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 6:55 PM EDT | Special Weather Statement | AKQ | 50 min |
| Jul 11, 7:04 PM EDT | Severe Thunderstorm Warning | AKQ | 24 min |
| Jul 16, 2:46 PM EDT | Heat Advisory | AKQ | 52 hr |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 8:57 PM EDT | Special Weather Statement | AKQ | 48 min |
| Jul 17, 9:29 PM EDT | Severe Thunderstorm Warning | AKQ | 29 min |
| Jul 18, 3:25 PM EDT | Excessive Heat Warning | AKQ | 3 days |
| Jul 18, 3:25 PM EDT | Heat Advisory | AKQ | 29 hr |
| Jul 18, 7:26 PM EDT | Special Weather Statement | AKQ | 49 min |
| Jul 18, 8:02 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 19, 3:15 AM EDT | Excessive Heat Watch | AKQ | 12 hr |
| Jul 21, 3:08 PM EDT | Heat Advisory | AKQ | 28 hr |
| Jul 22, 9:23 PM EDT | Special Weather Statement | AKQ | 52 min |
| Jul 31, 5:52 PM EDT | Special Weather Statement | AKQ | 38 min |
| Aug 1, 4:51 PM EDT | Severe Thunderstorm Warning | AKQ | 24 min |
| Aug 4, 1:43 PM EDT | Special Weather Statement | AKQ | 47 min |
| Aug 4, 8:01 PM EDT | Areal Flood Advisory | AKQ | 119 min |
| Aug 4, 9:39 PM EDT | Areal Flood Advisory | AKQ | 66 min |
| Aug 5, 5:07 PM EDT | Areal Flood Advisory | AKQ | 5 hr |
| Aug 5, 6:09 PM EDT | Areal Flood Advisory | AKQ | 4 hr |
| Aug 7, 12:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 7, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 7, 3:17 PM EDT | Severe Thunderstorm Warning | AKQ | 21 min |
| Aug 7, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Aug 7, 3:43 PM EDT | Special Weather Statement | AKQ | 47 min |
| Aug 7, 4:13 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Aug 7, 11:50 PM EDT | Severe Thunderstorm Warning | AKQ | 40 min |
| Aug 8, 12:47 AM EDT | Areal Flood Advisory | AKQ | 74 min |
| Aug 9, 2:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 13, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 9:14 PM EDT | Severe Thunderstorm Warning | AKQ | 46 min |
| Aug 13, 9:59 PM EDT | Special Weather Statement | AKQ | 46 min |
| Aug 15, 2:49 PM EDT | Special Weather Statement | AKQ | 41 min |
| Aug 15, 3:03 PM EDT | Severe Thunderstorm Warning | AKQ | 42 min |
| Aug 15, 3:31 PM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| Aug 15, 3:44 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 15, 4:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 16, 1:37 PM EDT | Areal Flood Advisory | AKQ | 113 min |
| Aug 19, 4:44 PM EDT | Special Weather Statement | AKQ | 31 min |
| Aug 19, 5:15 PM EDT | Special Weather Statement | AKQ | 30 min |
| Aug 19, 5:47 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Aug 20, 4:40 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 20, 7:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 10:17 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 20, 10:48 PM EDT | Flash Flood Warning | AKQ | 87 min |
| Aug 22, 5:04 PM EDT | Severe Thunderstorm Warning | AKQ | 41 min |
| Aug 22, 5:39 PM EDT | Severe Thunderstorm Warning | AKQ | 51 min |
| Aug 22, 5:44 PM EDT | Special Weather Statement | AKQ | 46 min |
| Aug 22, 6:11 PM EDT | Severe Thunderstorm Warning | AKQ | 38 min |
| Aug 22, 6:19 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 23, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 20, 9:17 AM EDT | Special Weather Statement | AKQ | 28 min |
| Oct 20, 9:45 AM EDT | Special Weather Statement | AKQ | 45 min |
| Oct 20, 10:31 AM EDT | Special Weather Statement | AKQ | 44 min |
| Oct 23, 1:06 AM EDT | Dense Fog Advisory | AKQ | 4 hr |
| Oct 31, 3:16 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 31, 6:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 31, 8:42 PM EDT | Severe Thunderstorm Warning | AKQ | 12 min |
| Oct 31, 9:54 PM EDT | Special Weather Statement | AKQ | 51 min |
| Oct 31, 11:17 PM EDT | Special Weather Statement | AKQ | 58 min |
| Nov 1, 4:00 AM EDT | Frost Advisory | AKQ | 29 hr |
| Nov 3, 2:00 PM EST | Freeze Warning | AKQ | 19 hr |
| Nov 12, 12:54 PM EST | Special Weather Statement | AKQ | 81 min |
| Dec 27, 12:39 AM EST | Dense Fog Advisory | AKQ | 10 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 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 29 |
| Special Weather Statement | 44 |
| Flooding | |
| Flash Flood Warning | 4 |
| River Flood Warning | 6 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 24 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 1 |
| 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 archive20182020
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.