Alert archive / Virginia / Botetourt County
Weather alerts in Botetourt County, Virginia, 2010
172 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Botetourt County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 172
- Warnings
- 54
- Watches
- 33
- Advisories
- 26
- Busiest month
- August22 alerts
- Busiest day
- August 5, 20109 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Botetourt County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 27 | 26 | 4% | 11 | 82% | 20 min |
| Flash flood warnings | 5 | 4 | 20% | 9 | 100% | 144 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 31 | 2 | 94% | 7 | 43% | 3 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 344 | 275 | 20% | 845 | 76% | 23 min |
| NWS Blacksburg, VA: flash flood warnings | 111 | 62 | 44% | 205 | 90% | 130 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 2, 4:11 AM EST | Wind Chill Advisory | RNK | 32 hr |
| Jan 3, 3:42 PM EST | Wind Chill Advisory | RNK | 19 hr |
| Jan 6, 3:04 PM EST | Winter Weather Advisory | RNK | 40 hr |
| Jan 16, 4:52 AM EST | Flood Watch | RNK | 35 hr |
| Jan 18, 11:47 AM EST | Flash Flood Watch | RNK | 8 days |
| Jan 20, 3:26 PM EST | Winter Storm Watch | RNK | 14 hr |
| Jan 21, 5:18 AM EST | Winter Storm Warning | RNK | 31 hr |
| Jan 23, 3:57 PM EST | Wind Advisory | RNK | 39 hr |
| Jan 24, 10:34 AM EST | River Flood Warning | RNK | 44 hr |
| Jan 24, 10:34 AM EST | River Flood Warning | RNK | 51 hr |
| Jan 24, 10:53 PM EST | Flash Flood Warning | RNK | 6 hr |
| Jan 25, 4:33 AM EST | Areal Flood Warning | RNK | 6 hr |
| Jan 25, 10:39 AM EST | Areal Flood Warning | RNK | 4 hr |
| Jan 25, 2:25 PM EST | Areal Flood Warning | RNK | 24 hr |
| Jan 25, 10:01 PM EST | Special Weather Statement | RNK | 59 min |
| Jan 27, 3:57 PM EST | Winter Storm Watch | RNK | 36 hr |
| Jan 28, 4:18 PM EST | Winter Storm Warning | RNK | 50 hr |
| Jan 30, 3:56 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 1, 3:53 PM EST | Winter Weather Advisory | RNK | 32 hr |
| Feb 3, 3:53 PM EST | Winter Storm Watch | RNK | 25 hr |
| Feb 4, 4:23 AM EST | Winter Storm Warning | RNK | 59 hr |
| Feb 5, 7:06 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 5, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 12:55 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 8, 4:16 PM EST | Winter Storm Warning | RNK | 62 hr |
| Feb 8, 4:16 PM EST | Winter Weather Advisory | RNK | 3 days |
| Feb 9, 3:56 AM EST | High Wind Watch | RNK | 18 hr |
| Feb 9, 12:14 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 1:22 PM EST | High Wind Warning | RNK | 40 hr |
| Feb 14, 3:35 PM EST | Winter Weather Advisory | RNK | 5 days |
| Feb 24, 3:44 PM EST | High Wind Warning | RNK | 60 hr |
| Mar 9, 3:33 PM EST | Flood Watch | RNK | 4 days |
| Mar 12, 12:03 PM EST | River Flood Warning | RNK | 27 hr |
| Mar 13, 4:53 AM EST | Areal Flood Warning | RNK | 6 hr |
| Mar 13, 4:20 PM EST | Areal Flood Warning | RNK | 6 hr |
| Mar 22, 5:24 AM EDT | Special Weather Statement | RNK | 66 min |
| Mar 22, 6:25 AM EDT | Special Weather Statement | RNK | 65 min |
| Mar 22, 6:42 AM EDT | Special Weather Statement | RNK | 63 min |
| Mar 28, 4:14 AM EDT | Flood Watch | RNK | 26 hr |
| Mar 28, 5:09 PM EDT | Special Weather Statement | RNK | 36 min |
| Apr 2, 12:10 PM EDT | Fire Weather Watch | RNK | 22 hr |
| Apr 5, 10:19 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Apr 5, 11:29 PM EDT | Special Weather Statement | RNK | 16 min |
| Apr 5, 11:53 PM EDT | Severe Thunderstorm Warning | RNK | 52 min |
| Apr 6, 12:42 AM EDT | Severe Thunderstorm Warning | RNK | 33 min |
| Apr 7, 9:44 AM EDT | Red Flag Warning | RNK | 10 hr |
| Apr 10, 4:05 PM EDT | Frost Advisory | RNK | 16 hr |
| Apr 16, 1:04 PM EDT | Red Flag Warning | RNK | 7 hr |
| Apr 17, 5:10 AM EDT | Red Flag Warning | RNK | 16 hr |
| Apr 18, 3:04 PM EDT | Frost Advisory | RNK | 18 hr |
| Apr 25, 2:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Apr 25, 6:31 PM EDT | Severe Thunderstorm Warning | RNK | 44 min |
| Apr 28, 3:12 PM EDT | Frost Advisory | RNK | 18 hr |
| May 7, 3:17 PM EDT | Wind Advisory | RNK | 32 hr |
| May 8, 4:52 AM EDT | Special Weather Statement | RNK | 53 min |
| May 8, 5:27 AM EDT | Special Weather Statement | RNK | 63 min |
| May 9, 4:35 AM EDT | Frost Advisory | RNK | 28 hr |
| May 12, 1:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 12, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 12, 3:04 PM EDT | Special Weather Statement | RNK | 41 min |
| May 12, 3:47 PM EDT | Special Weather Statement | RNK | 43 min |
| May 14, 6:11 AM EDT | Dense Fog Advisory | RNK | 3 hr |
| May 14, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 16, 4:19 AM EDT | Flash Flood Watch | RNK | 48 hr |
| May 23, 1:02 PM EDT | Special Weather Statement | RNK | 43 min |
| May 28, 4:28 AM EDT | Flash Flood Watch | RNK | 22 hr |
| May 28, 1:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 4:34 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| May 28, 5:15 PM EDT | Special Weather Statement | RNK | 60 min |
| May 28, 5:25 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| May 28, 5:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| May 31, 1:17 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| May 31, 2:20 PM EDT | Special Weather Statement | RNK | 25 min |
| Jun 4, 12:22 AM EDT | Special Weather Statement | RNK | 53 min |
| Jun 4, 3:27 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Jun 4, 3:40 PM EDT | Special Weather Statement | RNK | 65 min |
| Jun 4, 4:14 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 4, 4:17 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jun 9, 10:35 AM EDT | Flash Flood Watch | RNK | 10 hr |
| Jun 12, 1:33 PM EDT | Severe Thunderstorm Warning | RNK | 57 min |
| Jun 14, 10:28 AM EDT | Flash Flood Watch | RNK | 35 hr |
| Jun 14, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 3:36 PM EDT | Special Weather Statement | RNK | 54 min |
| Jun 15, 5:31 PM EDT | Severe Thunderstorm Warning | RNK | 44 min |
| Jun 19, 9:00 PM EDT | Special Weather Statement | RNK | 60 min |
| Jun 19, 9:19 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jun 24, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 24, 3:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 5:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Jun 28, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 8, 8:55 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 8, 9:34 PM EDT | Special Weather Statement | RNK | 56 min |
| Jul 8, 11:46 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Jul 9, 4:19 PM EDT | Flash Flood Watch | RNK | 7 hr |
| Jul 12, 2:06 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 13, 2:52 PM EDT | Severe Thunderstorm Warning | RNK | 68 min |
| Jul 13, 2:54 PM EDT | Severe Thunderstorm Warning | RNK | 96 min |
| Jul 13, 4:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 13, 5:25 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 17, 10:52 AM EDT | Special Weather Statement | RNK | 53 min |
| Jul 17, 11:19 AM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jul 20, 12:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 20, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 3:25 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 31, 9:31 PM EDT | Special Weather Statement | RNK | 59 min |
| Aug 4, 5:30 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Aug 4, 5:52 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 7:13 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| Aug 4, 7:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 4, 7:58 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| Aug 5, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 2:46 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Aug 5, 3:10 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Aug 5, 3:44 PM EDT | Severe Thunderstorm Warning | RNK | 76 min |
| Aug 5, 3:56 PM EDT | Severe Thunderstorm Warning | RNK | 47 min |
| Aug 5, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 5, 4:39 PM EDT | Severe Thunderstorm Warning | RNK | 34 min |
| Aug 5, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 15, 4:17 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| Aug 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 17, 3:08 PM EDT | Special Weather Statement | RNK | 37 min |
| Aug 17, 3:48 PM EDT | Flash Flood Watch | RNK | 50 hr |
| Aug 18, 2:22 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Aug 26, 2:26 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Aug 26, 3:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 7, 3:38 PM EDT | Fire Weather Watch | RNK | 18 hr |
| Sep 22, 3:33 PM EDT | Special Weather Statement | RNK | 57 min |
| Sep 22, 3:49 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Sep 22, 4:30 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Sep 26, 3:36 PM EDT | Flood Watch | RNK | 36 hr |
| Sep 29, 4:48 AM EDT | Flash Flood Watch | RNK | 30 hr |
| Sep 30, 7:06 AM EDT | Flash Flood Warning | RNK | 6 hr |
| Sep 30, 8:15 AM EDT | Special Weather Statement | RNK | 60 min |
| Sep 30, 9:13 AM EDT | Areal Flood Advisory | RNK | 6 hr |
| Sep 30, 9:58 AM EDT | Areal Flood Warning | RNK | 6 hr |
| Oct 13, 4:08 PM EDT | Special Weather Statement | RNK | 37 min |
| Oct 13, 4:46 PM EDT | Special Weather Statement | RNK | 29 min |
| Oct 13, 5:17 PM EDT | Special Weather Statement | RNK | 43 min |
| Oct 13, 6:04 PM EDT | Special Weather Statement | RNK | 26 min |
| Oct 20, 3:36 PM EDT | Wind Advisory | RNK | 24 hr |
| Oct 22, 3:55 AM EDT | Freeze Watch | RNK | 11 hr |
| Oct 22, 3:14 PM EDT | Freeze Warning | RNK | 18 hr |
| Oct 25, 10:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Oct 26, 6:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Oct 26, 7:19 PM EDT | Tornado Watch | SPC | 12 hr |
| Oct 26, 11:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Oct 27, 12:24 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 29, 4:00 AM EDT | Freeze Watch | RNK | 12 hr |
| Oct 29, 3:32 PM EDT | Freeze Warning | RNK | 17 hr |
| Nov 16, 3:44 PM EST | Wind Advisory | RNK | 23 hr |
| Nov 16, 8:47 PM EST | Tornado Watch | SPC | 6 hr |
| Nov 16, 9:16 PM EST | Special Weather Statement | RNK | 59 min |
| Nov 26, 3:39 AM EST | Wind Advisory | RNK | 32 hr |
| Nov 29, 3:44 AM EST | Flash Flood Watch | RNK | 50 hr |
| Nov 30, 11:30 PM EST | Special Weather Statement | RNK | 60 min |
| Dec 1, 12:48 AM EST | Mesoscale Discussion | SPC | 117 min |
| Dec 1, 1:07 AM EST | Flash Flood Warning | RNK | 6 hr |
| Dec 1, 9:44 AM EST | Wind Advisory | RNK | 5 hr |
| Dec 3, 3:23 PM EST | Winter Weather Advisory | RNK | 40 hr |
| Dec 11, 4:19 AM EST | Winter Weather Advisory | RNK | 60 hr |
| Dec 13, 5:29 AM EST | Wind Chill Advisory | RNK | 52 hr |
| Dec 15, 5:10 AM EST | Winter Storm Watch | RNK | 10 hr |
| Dec 15, 3:31 PM EST | Winter Storm Warning | RNK | 26 hr |
| Dec 15, 3:31 PM EST | Winter Weather Advisory | RNK | 37 hr |
| Dec 16, 4:17 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 22, 3:18 PM EST | Wind Advisory | RNK | 27 hr |
| Dec 25, 4:52 AM EST | Winter Weather Advisory | RNK | 32 hr |
| Dec 26, 4:34 AM EST | High Wind Warning | RNK | 40 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 archive20092011
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.