Alert archive / Virginia / Clarke County
Weather alerts in Clarke County, Virginia, 2024
128 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clarke County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 128
- Warnings
- 35
- Watches
- 25
- Advisories
- 42
- Busiest month
- August30 alerts
- Busiest day
- August 9, 20249 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Clarke County in 2024 had a tornado report inside them.
Clarke County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 0 | ||
| Severe thunderstorm warnings | 15 | 13 | 13% | 5 | 100% | 20 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 73 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 50 | 12 | 76% | 35 | 69% | 19 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 306 | 203 | 34% | 536 | 85% | 19 min |
| NWS Baltimore/Washington: flash flood warnings | 59 | 26 | 56% | 60 | 82% | 97 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, 2:21 PM EST | Winter Storm Watch | LWX | 19 hr |
| Jan 5, 9:31 AM EST | Winter Storm Warning | LWX | 35 hr |
| Jan 6, 11:47 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 1:57 AM EST | Flood Watch | LWX | 44 hr |
| Jan 9, 10:20 AM EST | River Flood Watch | LWX | 13 hr |
| Jan 9, 2:40 PM EST | Wind Advisory | LWX | 25 hr |
| Jan 12, 2:24 AM EST | Wind Advisory | LWX | 39 hr |
| Jan 14, 2:09 AM EST | Wind Advisory | LWX | 15 hr |
| Jan 14, 10:13 AM EST | Special Weather Statement | LWX | 32 min |
| Jan 14, 2:35 PM EST | Winter Weather Advisory | LWX | 43 hr |
| Jan 18, 8:26 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 24, 6:19 PM EST | Dense Fog Advisory | LWX | 41 hr |
| Jan 28, 8:42 AM EST | Areal Flood Warning | LWX | 8 hr |
| Jan 28, 10:02 AM EST | River Flood Watch | LWX | 19 hr |
| Feb 12, 4:07 AM EST | Winter Weather Advisory | LWX | 31 hr |
| Feb 15, 9:46 AM EST | Winter Storm Watch | LWX | 24 hr |
| Feb 16, 3:24 AM EST | Winter Storm Warning | LWX | 28 hr |
| Feb 27, 2:58 PM EST | Wind Advisory | LWX | 36 hr |
| Mar 3, 2:23 AM EST | Dense Fog Advisory | LWX | 7 hr |
| Mar 4, 2:57 AM EST | Dense Fog Advisory | LWX | 7 hr |
| Mar 6, 4:36 AM EST | Dense Fog Advisory | LWX | 7 hr |
| Mar 9, 3:15 AM EST | Wind Advisory | LWX | 61 hr |
| Mar 18, 2:33 PM EDT | Fire Weather Watch | LWX | 36 hr |
| Mar 19, 12:02 PM EDT | Wind Advisory | LWX | 32 hr |
| Mar 19, 2:50 PM EDT | Red Flag Warning | LWX | 29 hr |
| Mar 20, 1:38 PM EDT | High Wind Warning | LWX | 3 hr |
| Mar 20, 1:38 PM EDT | Wind Advisory | LWX | 6 hr |
| Mar 31, 1:41 PM EDT | Flood Watch | LWX | 3 days |
| Apr 12, 3:29 AM EDT | Wind Advisory | LWX | 37 hr |
| Apr 15, 11:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 15, 1:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 15, 1:27 PM EDT | Severe Thunderstorm Warning | LWX | 33 min |
| Apr 15, 1:44 PM EDT | Severe Thunderstorm Warning | LWX | 20 min |
| Apr 15, 1:50 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 21, 4:04 AM EDT | Freeze Watch | LWX | 9 hr |
| Apr 21, 12:42 PM EDT | Freeze Warning | LWX | 19 hr |
| Apr 22, 10:45 AM EDT | Frost Advisory | LWX | 22 hr |
| Apr 28, 6:23 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| May 1, 4:05 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| May 6, 3:27 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| May 20, 5:04 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| May 22, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 4:24 PM EDT | Severe Thunderstorm Warning | LWX | 23 min |
| May 22, 4:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 8:44 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 26, 9:05 PM EDT | Severe Thunderstorm Warning | LWX | 55 min |
| May 26, 9:56 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| May 27, 11:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 12:35 PM EDT | Heat Advisory | LWX | 31 hr |
| Jun 20, 4:59 PM EDT | Excessive Heat Watch | LWX | 19 hr |
| Jun 21, 12:27 PM EDT | Heat Advisory | LWX | 32 hr |
| Jun 22, 12:12 PM EDT | Heat Advisory | LWX | 30 hr |
| Jun 26, 6:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 8:10 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Jun 26, 8:33 PM EDT | Severe Thunderstorm Warning | LWX | 27 min |
| Jun 29, 3:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 29, 4:21 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 4, 3:52 AM EDT | Heat Advisory | LWX | 40 hr |
| Jul 8, 2:25 PM EDT | Heat Advisory | LWX | 30 hr |
| Jul 9, 4:15 AM EDT | Heat Advisory | LWX | 39 hr |
| Jul 10, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 10, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 4:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 13, 1:39 PM EDT | Excessive Heat Watch | LWX | 23 hr |
| Jul 14, 9:33 AM EDT | Excessive Heat Watch | LWX | 27 hr |
| Jul 14, 12:59 PM EDT | Excessive Heat Warning | LWX | 31 hr |
| Jul 15, 12:55 PM EDT | Excessive Heat Warning | LWX | 31 hr |
| Jul 15, 3:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 11:44 AM EDT | Heat Advisory | LWX | 32 hr |
| Jul 16, 2:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 16, 6:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 2:11 PM EDT | Mesoscale Discussion | SPC | 79 min |
| Jul 17, 2:38 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 17, 4:14 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jul 17, 4:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 30, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 4:15 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Aug 1, 12:01 PM EDT | Heat Advisory | LWX | 32 hr |
| Aug 1, 2:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 12:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 3, 2:10 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Aug 3, 2:39 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 3, 4:39 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 3, 5:20 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Aug 7, 2:43 PM EDT | Flood Watch | LWX | 45 hr |
| Aug 8, 11:49 AM EDT | River Flood Watch | LWX | 32 hr |
| Aug 8, 4:50 PM EDT | Flash Flood Warning | LWX | 77 min |
| Aug 8, 6:37 PM EDT | Tornado Watch | SPC | 12 hr |
| Aug 8, 8:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 8, 9:07 PM EDT | Flash Flood Warning | LWX | 6 hr |
| Aug 8, 9:07 PM EDT | Tornado Warning | LWX | 23 min |
| Aug 8, 9:26 PM EDT | Tornado Warning | LWX | 19 min |
| Aug 8, 9:40 PM EDT | Tornado Warning | LWX | 35 min |
| Aug 8, 11:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 9, 3:25 AM EDT | Areal Flood Warning | LWX | 10 hr |
| Aug 9, 4:38 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 9, 7:46 PM EDT | River Flood Warning | LWX | 13 hr |
| Aug 18, 1:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 27, 2:36 PM EDT | Heat Advisory | LWX | 28 hr |
| Aug 29, 10:59 AM EDT | Flood Watch | LWX | 12 hr |
| Aug 29, 1:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 29, 3:54 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 29, 5:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 31, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 31, 5:10 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Sep 8, 12:42 PM EDT | Frost Advisory | LWX | 20 hr |
| Sep 14, 5:37 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Sep 20, 4:29 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| Sep 21, 2:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 7:39 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Sep 28, 10:27 AM EDT | River Flood Warning | LWX | 38 hr |
| Sep 30, 12:08 AM EDT | River Flood Watch | LWX | 24 hr |
| Sep 30, 11:43 PM EDT | River Flood Warning | LWX | 54 hr |
| Oct 5, 2:51 AM EDT | Dense Fog Advisory | LWX | 6 hr |
| Oct 10, 12:49 PM EDT | Frost Advisory | LWX | 20 hr |
| Oct 15, 1:34 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 16, 2:01 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 17, 1:54 PM EDT | Frost Advisory | LWX | 19 hr |
| Oct 17, 11:24 PM EDT | Freeze Warning | LWX | 10 hr |
| Nov 1, 9:54 AM EDT | Red Flag Warning | LWX | 8 hr |
| Nov 7, 5:33 PM EST | Red Flag Warning | LWX | 24 hr |
| Nov 20, 1:59 AM EST | Wind Advisory | LWX | 23 hr |
| Dec 4, 4:22 AM EST | Wind Advisory | LWX | 44 hr |
| Dec 14, 12:26 PM EST | Winter Weather Advisory | LWX | 40 hr |
| Dec 23, 3:00 AM EST | Winter Weather Advisory | LWX | 40 hr |
| Dec 28, 8:54 PM EST | Dense Fog Advisory | LWX | 12 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.