Alert archive / Virginia / Pittsylvania County
Weather alerts in Pittsylvania County, Virginia, 2017
145 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Pittsylvania County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 145
- Warnings
- 40
- Watches
- 14
- Advisories
- 15
- Busiest month
- May34 alerts
- Busiest day
- May 1, 20178 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 1 tornado warnings covering Pittsylvania County in 2017 had a tornado report inside them.
Pittsylvania County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 30 | 27 | 10% | 51 | 65% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 17 | 4 | 76% | 12 | 58% | 17 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 167 | 140 | 16% | 462 | 74% | 19 min |
| NWS Blacksburg, VA: flash flood warnings | 24 | 15 | 38% | 53 | 72% | 80 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 5, 2:56 PM EST | Winter Storm Watch | RNK | 13 hr |
| Jan 6, 3:54 AM EST | Winter Storm Warning | RNK | 34 hr |
| Jan 6, 8:56 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 7, 3:18 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 21, 3:57 AM EST | Dense Fog Advisory | RNK | 8 hr |
| Feb 12, 3:29 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Feb 22, 10:30 PM EST | Dense Fog Advisory | RNK | 12 hr |
| Feb 25, 1:30 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 1, 9:44 AM EST | Mesoscale Discussion | SPC | 91 min |
| Mar 1, 10:38 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 1, 12:25 PM EST | Mesoscale Discussion | SPC | 65 min |
| Mar 1, 12:43 PM EST | Severe Thunderstorm Warning | RNK | 45 min |
| Mar 1, 2:38 PM EST | Special Weather Statement | RNK | 37 min |
| Mar 1, 3:02 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 18, 3:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 18, 3:59 PM EDT | Special Weather Statement | RNK | 16 min |
| Mar 18, 4:15 PM EDT | Special Weather Statement | RNK | 60 min |
| Mar 21, 10:00 AM EDT | Special Weather Statement | RNK | 15 min |
| Mar 31, 8:35 AM EDT | Special Weather Statement | RNK | 55 min |
| Mar 31, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Mar 31, 2:26 PM EDT | Special Weather Statement | RNK | 64 min |
| Apr 5, 3:39 PM EDT | Wind Advisory | RNK | 48 hr |
| Apr 6, 12:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Apr 6, 5:31 AM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Apr 6, 5:49 AM EDT | Special Weather Statement | RNK | 56 min |
| Apr 6, 5:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 7, 3:17 PM EDT | Frost Advisory | RNK | 18 hr |
| Apr 8, 2:44 PM EDT | Frost Advisory | RNK | 18 hr |
| Apr 15, 3:49 PM EDT | Special Weather Statement | RNK | 41 min |
| Apr 16, 7:03 PM EDT | Special Weather Statement | RNK | 57 min |
| Apr 21, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 22, 11:57 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 2:37 PM EDT | Severe Thunderstorm Warning | RNK | 53 min |
| Apr 22, 3:01 PM EDT | Special Weather Statement | RNK | 29 min |
| Apr 22, 3:09 PM EDT | Severe Thunderstorm Warning | RNK | 51 min |
| Apr 22, 3:17 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 22, 4:11 PM EDT | Flood Watch | RNK | 64 hr |
| Apr 22, 4:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 1:02 AM EDT | River Flood Warning | RNK | 3 days |
| May 1, 2:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 4:06 PM EDT | Special Weather Statement | RNK | 54 min |
| May 1, 5:04 PM EDT | Special Weather Statement | RNK | 56 min |
| May 1, 5:10 PM EDT | Severe Thunderstorm Warning | RNK | 43 min |
| May 1, 5:32 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| May 1, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 1, 6:25 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| May 1, 6:58 PM EDT | Severe Thunderstorm Warning | RNK | 77 min |
| May 4, 2:57 PM EDT | Flood Watch | RNK | 18 hr |
| May 5, 3:36 AM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| May 5, 3:45 AM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| May 5, 2:59 PM EDT | River Flood Warning | RNK | 32 hr |
| May 9, 11:25 PM EDT | Special Weather Statement | RNK | 50 min |
| May 11, 4:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 12:27 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| May 19, 1:25 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| May 19, 2:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 4:10 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| May 20, 6:58 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| May 20, 7:22 PM EDT | Severe Thunderstorm Warning | RNK | 53 min |
| May 20, 8:17 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| May 23, 3:22 AM EDT | Flood Watch | RNK | 23 hr |
| May 23, 7:12 AM EDT | Areal Flood Advisory | RNK | 3 hr |
| May 23, 10:09 AM EDT | River Flood Warning | RNK | 48 hr |
| May 23, 3:29 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| May 24, 4:27 AM EDT | Flash Flood Watch | RNK | 20 hr |
| May 24, 3:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 3:46 PM EDT | Tornado Watch | SPC | 6 hr |
| May 24, 6:49 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| May 24, 8:57 PM EDT | River Flood Warning | RNK | 44 hr |
| May 25, 9:52 AM EDT | Special Weather Statement | RNK | 38 min |
| May 25, 10:13 AM EDT | River Flood Warning | RNK | 17 hr |
| May 27, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 27, 6:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 4, 3:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 4, 5:23 PM EDT | Severe Thunderstorm Warning | RNK | 36 min |
| Jun 4, 5:29 PM EDT | Special Weather Statement | RNK | 46 min |
| Jun 13, 4:53 PM EDT | Severe Thunderstorm Warning | RNK | 67 min |
| Jun 13, 5:10 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| Jun 13, 5:43 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 6:16 PM EDT | Special Weather Statement | RNK | 29 min |
| Jun 15, 8:54 PM EDT | Severe Thunderstorm Warning | RNK | 30 min |
| Jun 16, 1:21 AM EDT | Special Weather Statement | RNK | 54 min |
| Jun 16, 2:09 AM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jun 16, 10:28 AM EDT | Special Weather Statement | RNK | 62 min |
| Jun 16, 11:33 AM EDT | Special Weather Statement | RNK | 42 min |
| Jun 16, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 17, 10:20 AM EDT | River Flood Warning | RNK | 31 hr |
| Jun 18, 11:30 PM EDT | Special Weather Statement | RNK | 60 min |
| Jun 19, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 12:48 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 2:08 PM EDT | Severe Thunderstorm Warning | RNK | 37 min |
| Jun 19, 6:01 PM EDT | Special Weather Statement | RNK | 29 min |
| Jun 19, 6:36 PM EDT | Special Weather Statement | RNK | 24 min |
| Jul 4, 5:34 PM EDT | Special Weather Statement | RNK | 56 min |
| Jul 4, 6:18 PM EDT | Special Weather Statement | RNK | 57 min |
| Jul 5, 8:54 PM EDT | Severe Thunderstorm Warning | RNK | 53 min |
| Jul 6, 4:28 PM EDT | Special Weather Statement | RNK | 47 min |
| Jul 6, 4:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 6, 5:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 8, 4:02 PM EDT | Special Weather Statement | RNK | 28 min |
| Jul 8, 4:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 8, 4:56 PM EDT | Special Weather Statement | RNK | 34 min |
| Jul 8, 6:11 PM EDT | Severe Thunderstorm Warning | RNK | 49 min |
| Jul 13, 4:20 PM EDT | Special Weather Statement | RNK | 25 min |
| Jul 14, 1:13 PM EDT | Special Weather Statement | RNK | 47 min |
| Jul 18, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 18, 4:48 PM EDT | Severe Thunderstorm Warning | RNK | 57 min |
| Jul 18, 5:02 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Jul 18, 5:48 PM EDT | Severe Thunderstorm Warning | RNK | 27 min |
| Jul 18, 6:51 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jul 21, 3:33 PM EDT | Heat Advisory | RNK | 27 hr |
| Jul 21, 5:14 PM EDT | Special Weather Statement | RNK | 61 min |
| Jul 22, 3:16 PM EDT | Severe Thunderstorm Warning | RNK | 24 min |
| Jul 27, 4:38 PM EDT | Special Weather Statement | RNK | 52 min |
| Aug 7, 9:32 PM EDT | Special Weather Statement | RNK | 43 min |
| Aug 7, 10:40 PM EDT | Special Weather Statement | RNK | 35 min |
| Aug 11, 6:50 PM EDT | Special Weather Statement | RNK | 55 min |
| Aug 11, 8:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Aug 15, 2:31 PM EDT | Special Weather Statement | RNK | 59 min |
| Aug 17, 3:28 PM EDT | Special Weather Statement | RNK | 62 min |
| Aug 18, 4:34 PM EDT | Special Weather Statement | RNK | 56 min |
| Aug 18, 5:56 PM EDT | Special Weather Statement | RNK | 34 min |
| Aug 18, 6:33 PM EDT | Special Weather Statement | RNK | 42 min |
| Sep 5, 4:27 PM EDT | Special Weather Statement | RNK | 63 min |
| Sep 20, 4:14 PM EDT | Special Weather Statement | RNK | 31 min |
| Sep 20, 4:27 PM EDT | Special Weather Statement | RNK | 33 min |
| Sep 20, 5:09 PM EDT | Special Weather Statement | RNK | 36 min |
| Sep 20, 5:37 PM EDT | Special Weather Statement | RNK | 23 min |
| Sep 20, 5:38 PM EDT | Special Weather Statement | RNK | 37 min |
| Sep 20, 6:09 PM EDT | Special Weather Statement | RNK | 51 min |
| Oct 11, 3:20 PM EDT | Special Weather Statement | RNK | 40 min |
| Oct 15, 5:14 AM EDT | Dense Fog Advisory | RNK | 6 hr |
| Oct 17, 4:03 AM EDT | Frost Advisory | RNK | 29 hr |
| Oct 23, 4:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Oct 23, 5:40 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 23, 6:46 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Oct 23, 7:16 PM EDT | Tornado Warning | RNK | 29 min |
| Oct 23, 7:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Oct 23, 7:50 PM EDT | Special Weather Statement | RNK | 55 min |
| Oct 26, 3:12 AM EDT | Frost Advisory | RNK | 30 hr |
| Nov 9, 3:41 AM EST | Freeze Watch | RNK | 23 hr |
| Nov 10, 3:03 AM EST | Freeze Warning | RNK | 31 hr |
| Dec 8, 4:15 AM EST | Winter Weather Advisory | RNK | 10 hr |
| Dec 8, 2:34 PM EST | Winter Storm Warning | RNK | 25 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 | 30 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 49 |
| Flooding | |
| River Flood Warning | 6 |
| Flash Flood Watch | 1 |
| Flood Watch | 3 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 1 |
| 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 archive20162018
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.