Alert archive / Virginia / Amherst County
Weather alerts in Amherst County, Virginia, 2023
139 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Amherst County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 139
- Warnings
- 32
- Watches
- 20
- Advisories
- 50
- Busiest month
- July53 alerts
- Busiest day
- July 13, 202311 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Amherst County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 17 | 17 | 0% | 11 | 73% | 17 min |
| Flash flood warnings | 3 | 3 | 0% | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 8 | 1 | 88% | 2 | 100% | 6 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 225 | 197 | 12% | 776 | 75% | 22 min |
| NWS Blacksburg, VA: flash flood warnings | 30 | 18 | 40% | 60 | 70% | 88 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 |
|---|---|---|---|
| Dec 31, 8:35 PM EST | Dense Fog Advisory | RNK | 10 hr |
| Jan 7, 2:58 PM EST | Winter Weather Advisory | LWX | 37 hr |
| Jan 7, 3:27 PM EST | Winter Weather Advisory | RNK | 39 hr |
| Jan 19, 2:40 AM EST | Wind Advisory | LWX | 35 hr |
| Jan 19, 4:19 AM EST | Wind Advisory | RNK | 36 hr |
| Jan 21, 4:05 AM EST | Winter Weather Advisory | RNK | 38 hr |
| Jan 21, 2:44 PM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 24, 12:03 PM EST | Winter Weather Advisory | LWX | 30 hr |
| Jan 31, 5:34 PM EST | Winter Weather Advisory | LWX | 13 hr |
| Feb 8, 12:01 PM EST | Wind Advisory | LWX | 43 hr |
| Feb 11, 4:36 AM EST | Winter Weather Advisory | RNK | 41 hr |
| Feb 11, 2:18 PM EST | Winter Weather Advisory | LWX | 34 hr |
| Feb 12, 10:40 AM EST | Winter Storm Warning | LWX | 13 hr |
| Feb 17, 4:08 AM EST | Wind Advisory | RNK | 23 hr |
| Feb 17, 3:21 PM EST | Wind Advisory | LWX | 4 hr |
| Feb 21, 3:58 AM EST | Wind Advisory | LWX | 13 hr |
| Feb 24, 1:42 PM EST | Winter Weather Advisory | LWX | 24 hr |
| Feb 24, 2:50 PM EST | Winter Weather Advisory | RNK | 23 hr |
| Feb 26, 4:59 AM EST | Dense Fog Advisory | RNK | 5 hr |
| Feb 27, 3:09 AM EST | Wind Advisory | RNK | 30 hr |
| Feb 27, 3:48 AM EST | Wind Advisory | LWX | 30 hr |
| Mar 2, 7:51 AM EST | Winter Storm Watch | LWX | 6 hr |
| Mar 2, 1:40 PM EST | Winter Weather Advisory | LWX | 28 hr |
| Mar 3, 12:33 PM EST | High Wind Warning | LWX | 24 hr |
| Mar 3, 12:33 PM EST | Wind Advisory | LWX | 26 hr |
| Mar 3, 8:49 PM EST | Special Weather Statement | RNK | 26 min |
| Mar 9, 4:20 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Mar 11, 4:09 AM EST | Winter Weather Advisory | RNK | 45 hr |
| Mar 11, 1:18 PM EST | Winter Weather Advisory | LWX | 40 hr |
| Mar 13, 2:37 PM EDT | Wind Advisory | RNK | 34 hr |
| Mar 13, 2:38 PM EDT | Wind Advisory | LWX | 33 hr |
| Mar 24, 5:32 PM EDT | Special Weather Statement | RNK | 58 min |
| Mar 30, 3:40 AM EDT | High Wind Watch | LWX | 35 hr |
| Mar 30, 2:47 PM EDT | High Wind Watch | RNK | 21 hr |
| Mar 31, 11:57 AM EDT | High Wind Warning | RNK | 40 hr |
| Mar 31, 2:29 PM EDT | High Wind Warning | LWX | 35 hr |
| Apr 6, 2:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 6, 2:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 6, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 8, 2:32 PM EDT | Frost Advisory | RNK | 19 hr |
| Apr 8, 2:32 PM EDT | Freeze Watch | RNK | 24 hr |
| Apr 9, 2:04 PM EDT | Freeze Warning | RNK | 19 hr |
| Apr 10, 10:00 AM EDT | Frost Advisory | RNK | 23 hr |
| Apr 17, 3:28 PM EDT | Fire Weather Watch | RNK | 12 hr |
| Apr 18, 3:31 AM EDT | Red Flag Warning | RNK | 16 hr |
| Apr 22, 9:59 AM EDT | Special Weather Statement | RNK | 31 min |
| Apr 22, 10:07 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Apr 23, 3:46 AM EDT | Freeze Watch | LWX | 9 hr |
| Apr 23, 12:24 PM EDT | Freeze Warning | LWX | 21 hr |
| Apr 24, 3:08 AM EDT | Freeze Watch | LWX | 11 hr |
| Apr 24, 2:32 PM EDT | Freeze Warning | LWX | 17 hr |
| Apr 28, 3:25 AM EDT | Wind Advisory | LWX | 15 hr |
| May 16, 8:54 PM EDT | Special Weather Statement | RNK | 36 min |
| Jun 16, 1:48 PM EDT | Special Weather Statement | RNK | 42 min |
| Jun 16, 2:18 PM EDT | Severe Thunderstorm Warning | RNK | 57 min |
| Jun 19, 3:31 PM EDT | Special Weather Statement | RNK | 14 min |
| Jun 26, 12:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 3:05 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 26, 3:58 PM EDT | Special Weather Statement | RNK | 47 min |
| Jun 26, 4:17 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jun 26, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 26, 5:29 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 26, 9:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 26, 9:40 PM EDT | Areal Flood Advisory | RNK | 2 hr |
| Jun 26, 10:06 PM EDT | Special Weather Statement | RNK | 24 min |
| Jul 1, 1:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 2, 2:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 2, 11:09 PM EDT | Special Weather Statement | RNK | 36 min |
| Jul 2, 11:40 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 3, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 7:31 PM EDT | Special Weather Statement | RNK | 14 min |
| Jul 3, 7:53 PM EDT | Special Weather Statement | RNK | 22 min |
| Jul 3, 8:03 PM EDT | Severe Thunderstorm Warning | RNK | 57 min |
| Jul 8, 4:10 PM EDT | Areal Flood Advisory | RNK | 70 min |
| Jul 13, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 3:31 PM EDT | Special Weather Statement | RNK | 29 min |
| Jul 13, 3:38 PM EDT | Severe Thunderstorm Warning | RNK | 52 min |
| Jul 13, 4:36 PM EDT | Severe Thunderstorm Warning | RNK | 39 min |
| Jul 13, 5:04 PM EDT | Special Weather Statement | RNK | 26 min |
| Jul 13, 5:19 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 13, 5:47 PM EDT | Severe Thunderstorm Warning | RNK | 43 min |
| Jul 13, 6:26 PM EDT | Severe Thunderstorm Warning | RNK | 34 min |
| Jul 13, 6:30 PM EDT | Flash Flood Warning | RNK | 10 hr |
| Jul 13, 7:41 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Jul 13, 7:59 PM EDT | Severe Thunderstorm Warning | RNK | 46 min |
| Jul 13, 8:40 PM EDT | Severe Thunderstorm Warning | RNK | 50 min |
| Jul 13, 9:18 PM EDT | Special Weather Statement | RNK | 27 min |
| Jul 13, 10:27 PM EDT | Flash Flood Watch | RNK | 6 hr |
| Jul 14, 12:14 AM EDT | Areal Flood Advisory | RNK | 2 hr |
| Jul 14, 7:06 PM EDT | Special Weather Statement | RNK | 24 min |
| Jul 14, 7:16 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 14, 7:47 PM EDT | Special Weather Statement | RNK | 28 min |
| Jul 14, 8:22 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 14, 8:27 PM EDT | Special Weather Statement | RNK | 33 min |
| Jul 14, 9:05 PM EDT | Special Weather Statement | RNK | 40 min |
| Jul 15, 3:50 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 4:03 PM EDT | Severe Thunderstorm Warning | RNK | 42 min |
| Jul 15, 4:42 PM EDT | Severe Thunderstorm Warning | RNK | 48 min |
| Jul 15, 5:08 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 15, 6:38 PM EDT | Flood Watch | LWX | 23 hr |
| Jul 15, 7:10 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 15, 8:59 PM EDT | Special Weather Statement | RNK | 16 min |
| Jul 15, 9:14 PM EDT | Areal Flood Advisory | RNK | 50 min |
| Jul 15, 9:56 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Jul 15, 11:18 PM EDT | Flash Flood Warning | RNK | 5 hr |
| Jul 16, 12:30 AM EDT | Flash Flood Watch | RNK | 7 hr |
| Jul 16, 4:22 AM EDT | Areal Flood Warning | RNK | 3 hr |
| Jul 17, 9:23 PM EDT | Areal Flood Advisory | RNK | 112 min |
| Jul 23, 8:10 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 23, 8:43 PM EDT | Special Weather Statement | RNK | 32 min |
| Jul 27, 2:45 PM EDT | Heat Advisory | RNK | 28 hr |
| Jul 28, 2:21 PM EDT | Heat Advisory | RNK | 30 hr |
| Jul 28, 5:54 PM EDT | Severe Thunderstorm Warning | RNK | 81 min |
| Jul 28, 6:29 PM EDT | Severe Thunderstorm Warning | RNK | 76 min |
| Jul 28, 6:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 29, 2:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 29, 3:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 29, 5:39 PM EDT | Severe Thunderstorm Warning | RNK | 66 min |
| Aug 7, 8:18 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 7, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 1:51 PM EDT | Tornado Watch | SPC | 6 hr |
| Aug 7, 4:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 8, 8:11 PM EDT | Severe Thunderstorm Warning | RNK | 50 min |
| Sep 9, 3:19 AM EDT | Flood Watch | RNK | 23 hr |
| Sep 9, 2:04 PM EDT | Flood Watch | LWX | 5 hr |
| Sep 12, 4:14 PM EDT | Special Weather Statement | RNK | 46 min |
| Sep 22, 4:20 AM EDT | Wind Advisory | LWX | 39 hr |
| Oct 22, 2:52 AM EDT | Frost Advisory | RNK | 30 hr |
| Oct 23, 9:52 AM EDT | Frost Advisory | LWX | 24 hr |
| Oct 30, 2:32 PM EDT | Freeze Watch | RNK | 14 hr |
| Oct 31, 4:02 AM EDT | Freeze Warning | RNK | 30 hr |
| Nov 1, 4:51 AM EDT | Freeze Warning | RNK | 28 hr |
| Nov 17, 11:24 AM EST | Fire Weather Watch | RNK | 20 hr |
| Nov 18, 2:05 AM EST | Dense Fog Advisory | RNK | 5 hr |
| Nov 20, 3:11 AM EST | Winter Weather Advisory | LWX | 36 hr |
| Nov 27, 2:21 AM EST | Wind Advisory | RNK | 35 hr |
| Dec 10, 3:28 AM EST | Winter Storm Warning | LWX | 31 hr |
| Dec 17, 3:51 AM EST | Wind Advisory | LWX | 34 hr |
| Dec 17, 5:01 AM EST | Wind Advisory | RNK | 47 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 | 17 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 23 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 10 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 15 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 4 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 2 |
| Wind Advisory | 16 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 2 |
| 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 archive20222024
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.