Alert archive / Virginia / Franklin County
Weather alerts in Franklin County, Virginia, 2009
134 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Franklin County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 134
- Warnings
- 52
- Watches
- 22
- Advisories
- 26
- Busiest month
- June27 alerts
- Busiest day
- May 9, 20098 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 2 tornado warnings covering Franklin County in 2009 had a tornado report inside them.
Franklin County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 40 | 22 | 45% | 20 | 90% | 22 min |
| Flash flood warnings | 5 | 4 | 20% | 3 | 0% |
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 15, 4:19 AM EST | Wind Chill Advisory | RNK | 33 hr |
| Jan 25, 2:05 PM EST | Winter Storm Watch | RNK | 25 hr |
| Jan 26, 3:20 PM EST | Winter Weather Advisory | RNK | 45 hr |
| Jan 27, 3:48 PM EST | Wind Advisory | RNK | 29 hr |
| Feb 3, 4:01 AM EST | Winter Weather Advisory | RNK | 32 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, 4:40 AM EST | Wind Advisory | RNK | 43 hr |
| Feb 11, 5:32 PM EST | Mesoscale Discussion | SPC | 88 min |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 28, 5:24 AM EST | Winter Storm Watch | RNK | 23 hr |
| Mar 1, 4:39 AM EST | Winter Storm Warning | RNK | 28 hr |
| Mar 1, 1:16 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Mar 27, 4:12 AM EDT | Dense Fog Advisory | RNK | 6 hr |
| Apr 2, 4:17 AM EDT | Dense Fog Advisory | RNK | 5 hr |
| Apr 2, 9:54 PM EDT | High Wind Watch | RNK | 6 hr |
| Apr 3, 3:57 AM EDT | Wind Advisory | RNK | 32 hr |
| Apr 16, 2:42 PM EDT | Frost Advisory | RNK | 17 hr |
| Apr 20, 2:50 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 20, 3:31 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 21, 2:45 PM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| Apr 21, 4:01 PM EDT | Special Weather Statement | RNK | 44 min |
| Apr 22, 1:14 PM EDT | Wind Advisory | RNK | 8 hr |
| May 3, 10:41 PM EDT | Special Weather Statement | RNK | 64 min |
| May 3, 10:43 PM EDT | Flood Watch | RNK | 13 hr |
| May 3, 11:52 PM EDT | Special Weather Statement | RNK | 53 min |
| May 4, 12:29 PM EDT | Tornado Watch | SPC | 5 hr |
| May 6, 2:16 PM EDT | Tornado Watch | SPC | 6 hr |
| May 6, 6:55 PM EDT | Severe Thunderstorm Warning | RNK | 19 min |
| May 7, 5:17 AM EDT | Mesoscale Discussion | SPC | 118 min |
| May 8, 10:01 PM EDT | Tornado Watch | SPC | 4 hr |
| May 8, 11:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 8, 11:48 PM EDT | Severe Thunderstorm Warning | RNK | 42 min |
| May 9, 12:29 AM EDT | Severe Thunderstorm Warning | RNK | 33 min |
| May 9, 12:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 9, 1:04 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| May 9, 1:14 PM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| May 9, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 3:57 AM EDT | Frost Advisory | RNK | 29 hr |
| May 25, 6:46 PM EDT | Special Weather Statement | RNK | 29 min |
| May 26, 12:07 PM EDT | Flash Flood Watch | RNK | 20 hr |
| May 28, 3:15 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| May 28, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 29, 2:28 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| May 29, 4:27 PM EDT | Severe Thunderstorm Warning | RNK | 78 min |
| May 31, 2:54 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 6:25 PM EDT | Severe Thunderstorm Warning | RNK | 37 min |
| Jun 3, 12:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 3, 1:02 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jun 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 3, 1:36 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jun 3, 2:00 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jun 3, 2:14 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 3, 2:30 PM EDT | Severe Thunderstorm Warning | RNK | 60 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, 12:39 PM EDT | Severe Thunderstorm Warning | RNK | 66 min |
| Jun 4, 1:43 PM EDT | Severe Thunderstorm Warning | RNK | 50 min |
| Jun 4, 1:51 PM EDT | Tornado Warning | RNK | 54 min |
| Jun 4, 2:18 PM EDT | Tornado Warning | RNK | 57 min |
| Jun 5, 3:19 AM EDT | Areal Flood Warning | RNK | 8 hr |
| Jun 9, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 4:20 PM EDT | Severe Thunderstorm Warning | RNK | 33 min |
| Jun 9, 6:02 PM EDT | Special Weather Statement | RNK | 28 min |
| Jun 9, 6:09 PM EDT | Severe Thunderstorm Warning | RNK | 81 min |
| Jun 9, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 6:47 PM EDT | Severe Thunderstorm Warning | RNK | 73 min |
| Jun 11, 7:28 PM EDT | Severe Thunderstorm Warning | RNK | 77 min |
| Jun 15, 2:31 PM EDT | Special Weather Statement | RNK | 44 min |
| Jun 16, 4:31 AM EDT | Flash Flood Warning | RNK | 6 hr |
| Jun 16, 2:58 PM EDT | Flash Flood Watch | RNK | 29 hr |
| Jun 16, 10:36 PM EDT | Special Weather Statement | RNK | 54 min |
| Jul 1, 12:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 11, 3:56 PM EDT | Special Weather Statement | RNK | 64 min |
| Jul 12, 2:47 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jul 17, 9:42 AM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Jul 17, 10:03 AM EDT | Severe Thunderstorm Warning | RNK | 57 min |
| Jul 17, 10:34 AM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jul 17, 4:33 PM EDT | Special Weather Statement | RNK | 57 min |
| Jul 17, 4:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 20, 6:00 AM EDT | Special Weather Statement | RNK | 60 min |
| Jul 20, 6:47 AM EDT | Flash Flood Warning | RNK | 5 hr |
| Jul 20, 7:36 AM EDT | Flash Flood Warning | RNK | 4 hr |
| Jul 20, 9:27 AM EDT | Flash Flood Watch | RNK | 12 hr |
| Jul 23, 12:10 AM EDT | Flash Flood Warning | RNK | 5 hr |
| Jul 23, 3:18 AM EDT | Special Weather Statement | RNK | 57 min |
| Jul 26, 1:40 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Aug 4, 3:07 PM EDT | Severe Thunderstorm Warning | RNK | 53 min |
| Aug 4, 4:32 PM EDT | Severe Thunderstorm Warning | RNK | 73 min |
| Aug 5, 3:19 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Aug 5, 3:48 PM EDT | Severe Thunderstorm Warning | RNK | 36 min |
| Aug 5, 4:14 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Aug 5, 4:35 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| Aug 5, 5:50 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| Aug 5, 6:14 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Aug 5, 6:29 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Aug 5, 6:54 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Aug 10, 6:55 PM EDT | Special Weather Statement | RNK | 35 min |
| Aug 10, 7:04 PM EDT | Severe Thunderstorm Warning | RNK | 36 min |
| Aug 11, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 11, 3:01 PM EDT | Severe Thunderstorm Warning | RNK | 74 min |
| Aug 20, 2:27 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Aug 22, 1:07 AM EDT | Special Weather Statement | RNK | 23 min |
| Aug 28, 10:43 PM EDT | Special Weather Statement | RNK | 62 min |
| Sep 19, 1:25 AM EDT | Dense Fog Advisory | RNK | 8 hr |
| Sep 25, 3:45 PM EDT | Flash Flood Watch | RNK | 31 hr |
| Oct 6, 9:53 PM EDT | Wind Advisory | RNK | 18 hr |
| Oct 18, 10:25 AM EDT | Frost Advisory | RNK | 24 hr |
| Oct 19, 3:27 AM EDT | Frost Advisory | RNK | 31 hr |
| Nov 3, 1:44 PM EST | Frost Advisory | RNK | 17 hr |
| Nov 10, 2:46 PM EST | Flood Watch | RNK | 45 hr |
| Nov 11, 4:10 AM EST | Wind Advisory | RNK | 50 hr |
| Nov 11, 10:57 AM EST | Areal Flood Warning | RNK | 46 hr |
| Nov 26, 1:34 AM EST | Dense Fog Advisory | RNK | 7 hr |
| Dec 1, 2:58 PM EST | Wind Advisory | RNK | 45 hr |
| Dec 8, 5:11 AM EST | Wind Advisory | RNK | 64 hr |
| Dec 12, 4:41 AM EST | Winter Weather Advisory | RNK | 31 hr |
| Dec 13, 8:05 PM EST | Dense Fog Advisory | RNK | 13 hr |
| Dec 17, 4:30 AM EST | Winter Storm Watch | RNK | 11 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, 3:49 PM EST | Winter Storm Watch | RNK | 24 hr |
| Dec 24, 4:04 AM EST | Freezing Rain Advisory | RNK | 35 hr |
| Dec 24, 4:17 AM EST | Wind Advisory | RNK | 36 hr |
| Dec 24, 11:11 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 25, 6:31 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 30, 3:22 PM EST | Winter Weather Advisory | RNK | 21 hr |
| Dec 30, 10:57 PM EST | Mesoscale Discussion | SPC | 6 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 | 40 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 5 |
| Flash Flood Watch | 4 |
| Flood Watch | 4 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 4 |
| Cold | |
| Frost Advisory | 5 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.