Alert archive / Virginia / Tazewell County
Weather alerts in Tazewell County, Virginia, 2009
148 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Tazewell County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 148
- Warnings
- 39
- Watches
- 25
- Advisories
- 30
- Busiest month
- June31 alerts
- Busiest day
- May 9, 20099 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Tazewell County in 2009 had a tornado report inside them.
Tazewell County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 13 | 8 | 38% | 3 | 67% | 45 min |
| Flash flood warnings | 14 | 7 | 50% | 6 | 83% | 58 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 19 | 1 | 95% | 9 | 11% | 4 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 264 | 144 | 45% | 348 | 82% | 26 min |
| NWS Blacksburg, VA: flash flood warnings | 108 | 53 | 51% | 135 | 81% | 100 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 6, 3:30 AM EST | Flood Watch | RNK | 43 hr |
| Jan 7, 4:19 AM EST | Wind Advisory | RNK | 23 hr |
| Jan 7, 4:02 PM EST | Winter Weather Advisory | RNK | 22 hr |
| Jan 15, 4:19 AM EST | Wind Chill Advisory | RNK | 33 hr |
| Jan 17, 11:36 PM EST | Freezing Rain Advisory | RNK | 11 hr |
| Jan 18, 10:52 AM EST | Winter Weather Advisory | RNK | 3 hr |
| Jan 18, 2:53 PM EST | Winter Weather Advisory | RNK | 27 hr |
| Jan 20, 2:00 PM EST | Wind Chill Advisory | RNK | 19 hr |
| Jan 27, 3:48 PM EST | Wind Advisory | RNK | 29 hr |
| Feb 2, 3:34 PM EST | Winter Storm Warning | RNK | 62 hr |
| Feb 4, 2:46 PM EST | Wind Chill Advisory | RNK | 19 hr |
| Feb 10, 3:01 PM EST | High Wind Watch | RNK | 14 hr |
| Feb 11, 4:40 AM EST | High Wind Warning | RNK | 35 hr |
| Feb 11, 4:34 PM EST | Mesoscale Discussion | SPC | 86 min |
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | 88 min |
| Feb 11, 5:47 PM EST | Severe Thunderstorm Warning | RNK | 240 days |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 11, 6:59 PM EST | Severe Thunderstorm Warning | RNK | 46 min |
| Feb 21, 3:22 PM EST | Winter Weather Advisory | RNK | 40 hr |
| Feb 27, 5:21 AM EST | Wind Advisory | RNK | 7 hr |
| Feb 28, 5:24 AM EST | Winter Storm Watch | RNK | 23 hr |
| Mar 2, 3:32 PM EST | Wind Chill Advisory | RNK | 17 hr |
| Mar 12, 3:59 PM EDT | Winter Weather Advisory | RNK | 19 hr |
| Mar 12, 10:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 28, 4:40 PM EDT | Wind Advisory | RNK | 11 hr |
| Apr 2, 4:17 AM EDT | Wind Advisory | RNK | 26 hr |
| Apr 3, 3:57 AM EDT | Wind Advisory | RNK | 32 hr |
| Apr 6, 1:39 AM EDT | Special Weather Statement | RNK | 66 min |
| Apr 6, 4:06 AM EDT | Winter Weather Advisory | RNK | 46 hr |
| Apr 10, 4:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 10, 7:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Apr 13, 9:37 AM EDT | Wind Advisory | RNK | 5 hr |
| May 3, 10:43 PM EDT | Flood Watch | RNK | 13 hr |
| May 5, 3:56 PM EDT | Flood Watch | RNK | 42 hr |
| May 6, 6:35 PM EDT | Special Weather Statement | RNK | 115 min |
| May 8, 3:51 PM EDT | Flood Watch | RNK | 26 hr |
| May 8, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 8, 6:32 PM EDT | Tornado Watch | SPC | 7 hr |
| May 8, 8:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 8, 9:26 PM EDT | Tornado Warning | RNK | 51 min |
| May 8, 9:31 PM EDT | Flash Flood Warning | RNK | 6 hr |
| May 8, 9:34 PM EDT | Tornado Warning | RNK | 41 min |
| May 8, 10:39 PM EDT | Tornado Warning | RNK | 41 min |
| May 8, 11:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 9, 12:46 AM EDT | Flash Flood Warning | RNK | 4 hr |
| May 9, 3:24 AM EDT | Flash Flood Warning | RNK | 6 hr |
| May 9, 9:11 AM EDT | Areal Flood Warning | RNK | 6 hr |
| May 18, 3:57 AM EDT | Frost Advisory | RNK | 29 hr |
| May 25, 2:51 PM EDT | Special Weather Statement | RNK | 39 min |
| May 25, 4:26 PM EDT | Special Weather Statement | RNK | 109 min |
| May 25, 6:30 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| May 27, 4:28 PM EDT | Flash Flood Warning | RNK | 3 hr |
| May 27, 5:06 PM EDT | Special Weather Statement | RNK | 39 min |
| May 27, 5:22 PM EDT | Flash Flood Warning | RNK | 4 hr |
| May 28, 3:42 AM EDT | Flash Flood Watch | RNK | 26 hr |
| May 28, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 28, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 7:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 29, 2:14 AM EDT | Flash Flood Warning | RNK | 4 hr |
| May 31, 2:23 AM EDT | Severe Thunderstorm Warning | RNK | 82 min |
| May 31, 2:54 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 5:31 AM EDT | Special Weather Statement | RNK | 59 min |
| Jun 2, 7:59 PM EDT | Special Weather Statement | RNK | 61 min |
| Jun 2, 8:04 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jun 2, 8:21 PM EDT | Severe Thunderstorm Warning | RNK | 84 min |
| Jun 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 3, 1:51 PM EDT | Flash Flood Watch | RNK | 15 hr |
| Jun 3, 4:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 3, 7:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 4:48 AM EDT | Flood Watch | RNK | 31 hr |
| Jun 4, 4:23 PM EDT | Special Weather Statement | RNK | 67 min |
| Jun 4, 5:03 PM EDT | Flash Flood Warning | RNK | 5 hr |
| Jun 8, 3:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 11, 9:51 AM EDT | Special Weather Statement | RNK | 54 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 4:40 PM EDT | Special Weather Statement | RNK | 50 min |
| Jun 11, 5:13 PM EDT | Severe Thunderstorm Warning | RNK | 77 min |
| Jun 15, 11:01 PM EDT | Special Weather Statement | RNK | 59 min |
| Jun 15, 11:44 PM EDT | Flash Flood Watch | RNK | 9 hr |
| Jun 16, 12:42 AM EDT | Flash Flood Warning | RNK | 5 hr |
| Jun 16, 2:58 PM EDT | Flash Flood Watch | RNK | 29 hr |
| Jun 16, 5:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 16, 8:00 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jun 16, 8:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 16, 8:56 PM EDT | Severe Thunderstorm Warning | RNK | 34 min |
| Jun 17, 1:53 AM EDT | Special Weather Statement | RNK | 82 min |
| Jun 17, 2:12 AM EDT | Flash Flood Warning | RNK | 6 hr |
| Jun 17, 12:40 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jun 17, 2:39 PM EDT | Flash Flood Warning | RNK | 5 hr |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 18, 3:01 PM EDT | Special Weather Statement | RNK | 29 min |
| Jun 18, 3:35 PM EDT | Special Weather Statement | RNK | 40 min |
| Jun 28, 4:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 9, 2:23 PM EDT | Special Weather Statement | RNK | 67 min |
| Jul 9, 2:56 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Jul 17, 2:39 PM EDT | Special Weather Statement | RNK | 66 min |
| Jul 20, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 25, 8:30 PM EDT | Severe Thunderstorm Warning | RNK | 90 min |
| Jul 25, 8:56 PM EDT | Special Weather Statement | RNK | 64 min |
| Jul 26, 9:59 AM EDT | Flash Flood Watch | RNK | 4 hr |
| Jul 28, 8:57 PM EDT | Special Weather Statement | RNK | 63 min |
| Jul 31, 10:13 AM EDT | Special Weather Statement | RNK | 62 min |
| Aug 2, 12:40 AM EDT | Flash Flood Watch | RNK | 15 hr |
| Aug 5, 6:15 AM EDT | Special Weather Statement | RNK | 45 min |
| Aug 5, 5:33 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Aug 5, 5:46 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Aug 11, 8:51 AM EDT | Special Weather Statement | RNK | 54 min |
| Aug 11, 10:20 AM EDT | Special Weather Statement | RNK | 55 min |
| Aug 11, 11:30 AM EDT | Special Weather Statement | RNK | 60 min |
| Aug 11, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 17, 2:50 PM EDT | Special Weather Statement | RNK | 55 min |
| Aug 18, 7:04 PM EDT | Special Weather Statement | RNK | 41 min |
| Aug 22, 5:04 AM EDT | Special Weather Statement | RNK | 56 min |
| Sep 6, 9:20 PM EDT | Special Weather Statement | RNK | 55 min |
| Sep 6, 10:15 PM EDT | Special Weather Statement | RNK | 60 min |
| Sep 9, 12:40 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Sep 9, 1:08 PM EDT | Severe Thunderstorm Warning | RNK | 43 min |
| Sep 9, 1:28 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Sep 19, 1:25 AM EDT | Dense Fog Advisory | RNK | 8 hr |
| Sep 25, 3:45 PM EDT | Flash Flood Watch | RNK | 31 hr |
| Sep 25, 6:21 PM EDT | Special Weather Statement | RNK | 24 min |
| Sep 26, 11:40 AM EDT | Special Weather Statement | RNK | 50 min |
| Sep 26, 2:41 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Sep 30, 3:49 AM EDT | Frost Advisory | RNK | 30 hr |
| Oct 6, 9:53 PM EDT | Wind Advisory | RNK | 18 hr |
| Oct 8, 4:03 PM EDT | Wind Advisory | RNK | 27 hr |
| Oct 9, 5:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Oct 9, 7:45 PM EDT | Special Weather Statement | RNK | 90 min |
| Oct 16, 5:13 PM EDT | Freeze Warning | RNK | 16 hr |
| Oct 17, 3:48 PM EDT | Freeze Watch | RNK | 19 hr |
| Oct 17, 3:48 PM EDT | Freeze Warning | RNK | 17 hr |
| Oct 18, 10:25 AM EDT | Freeze Warning | RNK | 24 hr |
| Oct 24, 4:14 AM EDT | Special Weather Statement | RNK | 61 min |
| Nov 10, 2:46 PM EST | Flood Watch | RNK | 45 hr |
| Nov 17, 9:59 PM EST | Wind Advisory | RNK | 18 hr |
| Dec 1, 4:11 AM EST | High Wind Watch | RNK | 11 hr |
| Dec 1, 2:58 PM EST | High Wind Warning | RNK | 37 hr |
| Dec 4, 3:57 PM EST | Winter Weather Advisory | RNK | 27 hr |
| Dec 8, 5:11 AM EST | High Wind Warning | RNK | 53 hr |
| Dec 8, 5:11 AM EST | Wind Advisory | RNK | 64 hr |
| Dec 9, 2:58 AM EST | Flood Watch | RNK | 5 hr |
| Dec 13, 8:05 PM EST | Dense Fog Advisory | RNK | 13 hr |
| Dec 17, 3:20 PM EST | Winter Storm Warning | RNK | 60 hr |
| Dec 18, 1:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 18, 7:22 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 23, 3:37 PM EST | High Wind Watch | RNK | 13 hr |
| Dec 24, 4:17 AM EST | High Wind Warning | RNK | 36 hr |
| Dec 30, 3:22 PM EST | Winter Weather Advisory | RNK | 21 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 archive20082010
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.