Alert archive / Virginia / Henrico County
Weather alerts in Henrico County, Virginia, 2020
185 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 185
- Warnings
- 54
- Watches
- 17
- Advisories
- 48
- Busiest month
- August50 alerts
- Busiest day
- August 6, 202011 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, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 14 | 7% | 6 | 100% | 22 min |
| Flash flood warnings | 12 | 9 | 25% | 2 | 100% | 49 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wakefield, VA: tornado warnings | 60 | 19 | 68% | 39 | 72% | 17 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 170 | 120 | 29% | 237 | 91% | 19 min |
| NWS Wakefield, VA: flash flood warnings | 87 | 57 | 34% | 118 | 92% | 79 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 4, 5:11 PM EST | Special Weather Statement | AKQ | 49 min |
| Jan 11, 11:25 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Jan 12, 12:34 AM EST | Severe Thunderstorm Warning | AKQ | 41 min |
| Jan 12, 1:18 AM EST | Severe Thunderstorm Warning | AKQ | 27 min |
| Jan 14, 3:21 AM EST | Special Weather Statement | AKQ | 39 min |
| Jan 14, 5:30 AM EST | Special Weather Statement | AKQ | 45 min |
| Feb 5, 3:45 PM EST | Flood Watch | AKQ | 37 hr |
| Feb 6, 2:18 PM EST | Areal Flood Advisory | AKQ | 3 hr |
| Feb 6, 2:42 PM EST | Wind Advisory | AKQ | 27 hr |
| Feb 6, 2:57 PM EST | Areal Flood Advisory | AKQ | 3 hr |
| Feb 7, 8:08 AM EST | Special Weather Statement | AKQ | 52 min |
| Feb 7, 9:55 AM EST | River Flood Warning | AKQ | 63 hr |
| Feb 8, 4:53 PM EST | River Flood Warning | AKQ | 24 hr |
| Feb 19, 8:25 PM EST | Winter Weather Advisory | AKQ | 35 hr |
| Feb 26, 1:08 AM EST | Dense Fog Advisory | AKQ | 12 hr |
| Feb 26, 8:44 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 29, 6:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 7, 5:46 PM EDT | Special Weather Statement | AKQ | 44 min |
| Apr 7, 6:13 PM EDT | Special Weather Statement | AKQ | 32 min |
| Apr 12, 2:25 PM EDT | Wind Advisory | AKQ | 26 hr |
| Apr 13, 4:40 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 13, 5:01 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 13, 6:46 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 13, 8:46 AM EDT | Severe Thunderstorm Warning | AKQ | 44 min |
| Apr 14, 12:07 AM EDT | River Flood Warning | AKQ | 58 hr |
| Apr 14, 6:59 AM EDT | River Flood Warning | AKQ | 45 hr |
| Apr 16, 3:12 PM EDT | Frost Advisory | AKQ | 18 hr |
| Apr 24, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 24, 4:02 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Apr 24, 4:40 PM EDT | Severe Thunderstorm Warning | AKQ | 50 min |
| Apr 26, 7:17 PM EDT | Special Weather Statement | AKQ | 43 min |
| Apr 29, 3:23 AM EDT | Flood Watch | AKQ | 39 hr |
| Apr 30, 8:41 AM EDT | Special Weather Statement | AKQ | 64 min |
| Apr 30, 1:49 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Apr 30, 7:49 PM EDT | River Flood Warning | AKQ | 56 hr |
| May 1, 1:58 PM EDT | River Flood Warning | AKQ | 36 hr |
| May 8, 10:55 PM EDT | Special Weather Statement | AKQ | 50 min |
| May 9, 3:26 AM EDT | Frost Advisory | AKQ | 29 hr |
| May 9, 3:26 AM EDT | Freeze Warning | AKQ | 29 hr |
| May 21, 3:25 PM EDT | River Flood Warning | AKQ | 3 days |
| May 22, 3:05 PM EDT | River Flood Warning | AKQ | 53 hr |
| May 28, 11:33 AM EDT | Special Weather Statement | AKQ | 42 min |
| May 30, 2:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 11, 8:01 PM EDT | Special Weather Statement | AKQ | 44 min |
| Jun 11, 8:43 PM EDT | Special Weather Statement | AKQ | 47 min |
| Jun 11, 9:32 PM EDT | Special Weather Statement | AKQ | 43 min |
| Jun 11, 10:58 PM EDT | Special Weather Statement | AKQ | 62 min |
| Jun 11, 11:18 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 19, 9:19 AM EDT | River Flood Warning | AKQ | 24 hr |
| Jun 19, 2:25 PM EDT | Flash Flood Warning | AKQ | 2 hr |
| Jun 19, 2:32 PM EDT | Severe Thunderstorm Warning | AKQ | 43 min |
| Jun 19, 4:49 PM EDT | Special Weather Statement | AKQ | 56 min |
| Jun 19, 5:22 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 19, 5:37 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Jun 19, 6:05 PM EDT | Severe Thunderstorm Warning | AKQ | 40 min |
| Jun 22, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 22, 2:20 PM EDT | Severe Thunderstorm Warning | AKQ | 40 min |
| Jun 22, 2:34 PM EDT | Special Weather Statement | AKQ | 41 min |
| Jun 25, 1:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 25, 4:27 PM EDT | Special Weather Statement | AKQ | 48 min |
| Jun 25, 4:37 PM EDT | Severe Thunderstorm Warning | AKQ | 53 min |
| Jun 25, 5:13 PM EDT | Severe Thunderstorm Warning | AKQ | 47 min |
| Jun 25, 5:27 PM EDT | Areal Flood Advisory | AKQ | 63 min |
| Jun 25, 5:44 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Jun 25, 5:49 PM EDT | Severe Thunderstorm Warning | AKQ | 41 min |
| Jun 25, 6:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 25, 6:20 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 25, 9:33 PM EDT | Special Weather Statement | AKQ | 42 min |
| Jun 25, 10:18 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 25, 10:18 PM EDT | Special Weather Statement | AKQ | 42 min |
| Jun 25, 10:43 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jun 28, 6:26 PM EDT | Special Weather Statement | AKQ | 34 min |
| Jul 1, 1:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 1, 2:15 PM EDT | Special Weather Statement | AKQ | 45 min |
| Jul 1, 4:18 PM EDT | Severe Thunderstorm Warning | AKQ | 42 min |
| Jul 1, 4:24 PM EDT | Areal Flood Advisory | AKQ | 6 min |
| Jul 1, 4:30 PM EDT | Flash Flood Warning | AKQ | 2 hr |
| Jul 1, 5:00 PM EDT | Flash Flood Warning | AKQ | 117 min |
| Jul 17, 1:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 17, 3:42 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Jul 17, 4:10 PM EDT | Special Weather Statement | AKQ | 50 min |
| Jul 17, 4:16 PM EDT | Severe Thunderstorm Warning | AKQ | 29 min |
| Jul 18, 3:09 PM EDT | Heat Advisory | AKQ | 30 hr |
| Jul 19, 2:40 PM EDT | Heat Advisory | AKQ | 30 hr |
| Jul 20, 8:46 PM EDT | Heat Advisory | AKQ | 70 hr |
| Jul 21, 9:39 PM EDT | Special Weather Statement | AKQ | 51 min |
| Jul 21, 10:15 PM EDT | Severe Thunderstorm Warning | AKQ | 45 min |
| Jul 22, 1:07 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Jul 22, 1:17 AM EDT | Special Weather Statement | AKQ | 43 min |
| Jul 22, 10:48 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 24, 4:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 24, 9:34 PM EDT | Special Weather Statement | AKQ | 71 min |
| Jul 26, 3:32 PM EDT | Heat Advisory | AKQ | 52 hr |
| Jul 28, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 28, 5:38 PM EDT | Special Weather Statement | AKQ | 52 min |
| Jul 31, 1:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 31, 6:14 PM EDT | Special Weather Statement | AKQ | 46 min |
| Aug 2, 3:26 PM EDT | Flash Flood Watch | AKQ | 43 hr |
| Aug 2, 5:44 PM EDT | Tropical Storm Watch | AKQ | 5 hr |
| Aug 2, 10:51 PM EDT | Tropical Storm Warning | AKQ | 43 hr |
| Aug 3, 1:34 PM EDT | Special Weather Statement | AKQ | 56 min |
| Aug 3, 7:02 PM EDT | Special Weather Statement | AKQ | 43 min |
| Aug 4, 12:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 4, 1:41 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 4, 4:22 AM EDT | Flash Flood Warning | AKQ | 5 hr |
| Aug 4, 10:39 PM EDT | Areal Flood Warning | AKQ | 8 days |
| Aug 5, 7:39 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 5, 8:08 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 5, 8:17 PM EDT | Special Weather Statement | AKQ | 43 min |
| Aug 5, 8:37 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 5, 9:18 PM EDT | Special Weather Statement | AKQ | 42 min |
| Aug 6, 10:43 AM EDT | Flash Flood Watch | AKQ | 15 hr |
| Aug 6, 2:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 6, 4:44 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 6, 4:56 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Aug 6, 5:14 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 6, 5:49 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 6, 6:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 6, 9:12 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 7, 2:43 AM EDT | Flash Flood Watch | AKQ | 19 hr |
| Aug 9, 6:09 PM EDT | Areal Flood Advisory | AKQ | 22 min |
| Aug 9, 6:31 PM EDT | Flash Flood Warning | AKQ | 93 min |
| Aug 10, 1:38 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 12, 3:13 AM EDT | Flash Flood Watch | AKQ | 19 hr |
| Aug 12, 2:38 PM EDT | Areal Flood Advisory | AKQ | 112 min |
| Aug 12, 2:53 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 12, 6:53 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 13, 2:25 AM EDT | Flash Flood Watch | AKQ | 17 hr |
| Aug 13, 3:26 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 13, 4:04 PM EDT | Flash Flood Warning | AKQ | 3 hr |
| Aug 14, 9:34 PM EDT | Areal Flood Advisory | AKQ | 116 min |
| Aug 14, 11:30 PM EDT | Areal Flood Advisory | AKQ | 2 hr |
| Aug 15, 3:21 AM EDT | Flash Flood Watch | AKQ | 33 hr |
| Aug 15, 5:23 AM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 15, 8:37 AM EDT | Areal Flood Advisory | AKQ | 6 hr |
| Aug 15, 1:30 PM EDT | Areal Flood Warning | AKQ | 23 hr |
| Aug 15, 10:45 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Aug 16, 12:10 PM EDT | Areal Flood Advisory | AKQ | 49 min |
| Aug 16, 12:59 PM EDT | Areal Flood Warning | AKQ | 19 hr |
| Aug 17, 4:51 PM EDT | Special Weather Statement | AKQ | 54 min |
| Aug 21, 8:18 PM EDT | Flash Flood Watch | AKQ | 12 hr |
| Aug 25, 7:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 25, 8:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 27, 9:16 PM EDT | Special Weather Statement | AKQ | 44 min |
| Aug 28, 7:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 12:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 12:12 PM EDT | Special Weather Statement | AKQ | 48 min |
| Sep 1, 3:41 PM EDT | River Flood Warning | AKQ | 14 hr |
| Sep 2, 7:09 PM EDT | Heat Advisory | AKQ | 25 hr |
| Sep 3, 3:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 9, 2:26 PM EDT | Flash Flood Watch | AKQ | 31 hr |
| Sep 10, 4:48 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Sep 16, 3:51 AM EDT | Flash Flood Watch | AKQ | 50 hr |
| Sep 17, 3:26 PM EDT | Areal Flood Advisory | AKQ | 107 min |
| Sep 17, 5:13 PM EDT | Areal Flood Warning | AKQ | 6 hr |
| Sep 29, 8:32 PM EDT | Special Weather Statement | AKQ | 43 min |
| Sep 29, 9:39 PM EDT | Special Weather Statement | AKQ | 51 min |
| Sep 29, 10:39 PM EDT | Areal Flood Advisory | AKQ | 3 hr |
| Oct 16, 7:49 AM EDT | Special Weather Statement | AKQ | 56 min |
| Oct 21, 12:37 AM EDT | Dense Fog Advisory | AKQ | 9 hr |
| Oct 27, 1:30 AM EDT | Dense Fog Advisory | AKQ | 10 hr |
| Oct 28, 3:27 PM EDT | Wind Advisory | AKQ | 28 hr |
| Oct 28, 3:37 PM EDT | Flood Watch | AKQ | 24 hr |
| Oct 30, 8:01 AM EDT | River Flood Warning | AKQ | 44 hr |
| Oct 30, 8:01 AM EDT | River Flood Warning | AKQ | 44 hr |
| Oct 31, 5:10 AM EDT | River Flood Warning | AKQ | 8 hr |
| Nov 2, 1:43 PM EST | Freeze Warning | AKQ | 18 hr |
| Nov 11, 10:30 AM EST | Flash Flood Watch | AKQ | 31 hr |
| Nov 11, 9:51 PM EST | River Flood Warning | AKQ | 21 days |
| Nov 11, 9:51 PM EST | River Flood Warning | AKQ | 4 days |
| Nov 15, 9:04 PM EST | Special Weather Statement | AKQ | 56 min |
| Nov 30, 12:26 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Nov 30, 12:27 PM EST | Special Weather Statement | AKQ | 33 min |
| Nov 30, 9:22 PM EST | River Flood Warning | AKQ | 28 hr |
| Dec 1, 1:54 PM EST | River Flood Warning | AKQ | 8 hr |
| Dec 5, 12:31 AM EST | Areal Flood Advisory | AKQ | 6 hr |
| Dec 5, 2:37 PM EST | River Flood Warning | AKQ | 24 hr |
| Dec 14, 10:10 AM EST | Areal Flood Advisory | AKQ | 4 hr |
| Dec 23, 2:36 PM EST | Flash Flood Watch | AKQ | 33 hr |
| Dec 24, 3:28 PM EST | Severe Thunderstorm Warning | AKQ | 32 min |
| Dec 24, 3:40 PM EST | Special Weather Statement | AKQ | 50 min |
| Dec 24, 3:54 PM EST | Areal Flood Advisory | AKQ | 3 hr |
| Dec 24, 10:37 PM EST | Special Weather Statement | AKQ | 23 min |
| Dec 25, 4:36 AM EST | River Flood Warning | AKQ | 40 hr |
| Dec 25, 3:49 PM EST | River Flood Warning | AKQ | 23 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 | 15 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 25 |
| Special Weather Statement | 41 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 12 |
| River Flood Warning | 20 |
| Flash Flood Watch | 11 |
| Flood Watch | 3 |
| Areal Flood Advisory | 34 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.