Alert archive / North Carolina / Caswell County
Weather alerts in Caswell County, North Carolina, 2012
154 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Caswell County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 154
- Warnings
- 30
- Watches
- 19
- Advisories
- 24
- Busiest month
- July49 alerts
- Busiest day
- March 24, 20128 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 Caswell County in 2012 had a tornado report inside them.
Caswell County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 22 | 21 | 5% | 18 | 89% | 28 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 17 | 0 | 100% | 0 | ||
| NWS Blacksburg, VA: severe thunderstorm warnings | 359 | 271 | 25% | 793 | 83% | 23 min |
| NWS Blacksburg, VA: flash flood warnings | 50 | 27 | 46% | 60 | 77% | 56 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 9, 10:34 PM EST | Dense Fog Advisory | RNK | 10 hr |
| Jan 17, 6:39 PM EST | Special Weather Statement | RNK | 51 min |
| Jan 24, 1:29 AM EST | Dense Fog Advisory | RNK | 10 hr |
| Feb 16, 10:28 PM EST | Dense Fog Advisory | RNK | 5 hr |
| Feb 18, 4:36 PM EST | Winter Weather Advisory | RNK | 34 hr |
| Feb 19, 12:47 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 11:18 PM EST | Special Weather Statement | RNK | 27 min |
| Feb 23, 2:26 PM EST | Wind Advisory | RNK | 34 hr |
| Feb 24, 3:44 PM EST | Fire Weather Watch | RNK | 14 hr |
| Feb 24, 3:45 PM EST | Special Weather Statement | RNK | 45 min |
| Feb 24, 3:49 PM EST | Severe Thunderstorm Warning | RNK | 56 min |
| Feb 24, 4:07 PM EST | Tornado Warning | RNK | 13 min |
| Feb 24, 4:45 PM EST | Mesoscale Discussion | SPC | 90 min |
| Feb 25, 6:06 AM EST | Red Flag Warning | RNK | 13 hr |
| Feb 28, 3:19 AM EST | Dense Fog Advisory | RNK | 5 hr |
| Mar 4, 2:22 PM EST | Winter Weather Advisory | RNK | 22 hr |
| Mar 20, 3:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Mar 20, 5:42 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Mar 20, 6:43 PM EDT | Severe Thunderstorm Warning | RNK | 62 min |
| Mar 21, 5:52 AM EDT | Dense Fog Advisory | RNK | 4 hr |
| Mar 21, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Mar 24, 12:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Mar 24, 12:46 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 24, 2:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Mar 24, 3:38 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 24, 6:43 PM EDT | Tornado Watch | SPC | 4 hr |
| Mar 24, 6:45 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Mar 24, 7:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Mar 24, 7:39 PM EDT | Severe Thunderstorm Warning | RNK | 81 min |
| Mar 25, 6:50 AM EDT | Flash Flood Watch | RNK | 14 hr |
| Apr 4, 1:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 4, 2:34 PM EDT | Special Weather Statement | RNK | 56 min |
| Apr 4, 4:21 PM EDT | Special Weather Statement | RNK | 54 min |
| Apr 4, 5:44 PM EDT | Special Weather Statement | RNK | 61 min |
| Apr 6, 3:37 AM EDT | Frost Advisory | RNK | 30 hr |
| Apr 8, 7:09 PM EDT | Fire Weather Watch | RNK | 16 hr |
| Apr 8, 7:09 PM EDT | Red Flag Warning | RNK | 25 hr |
| Apr 9, 10:51 AM EDT | Fire Weather Watch | RNK | 16 hr |
| Apr 9, 8:51 PM EDT | Red Flag Warning | RNK | 23 hr |
| Apr 10, 3:52 PM EDT | Freeze Watch | RNK | 23 hr |
| Apr 11, 3:13 PM EDT | Freeze Warning | RNK | 18 hr |
| Apr 21, 7:35 PM EDT | Special Weather Statement | RNK | 55 min |
| Apr 26, 10:42 AM EDT | Special Weather Statement | RNK | 63 min |
| May 1, 12:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 1, 5:22 PM EDT | Special Weather Statement | RNK | 23 min |
| May 2, 1:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 9, 2:40 PM EDT | Special Weather Statement | RNK | 65 min |
| May 15, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 22, 6:55 PM EDT | Special Weather Statement | RNK | 50 min |
| May 24, 1:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 29, 6:36 PM EDT | Special Weather Statement | RNK | 24 min |
| May 29, 10:40 PM EDT | Special Weather Statement | RNK | 110 min |
| Jun 1, 1:28 PM EDT | Tornado Watch | SPC | 8 hr |
| Jun 18, 5:35 PM EDT | Special Weather Statement | RNK | 40 min |
| Jun 22, 2:45 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jun 22, 4:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 12:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 29, 3:46 AM EDT | Heat Advisory | RNK | 16 hr |
| Jun 29, 3:33 PM EDT | Excessive Heat Warning | RNK | 28 hr |
| Jun 29, 9:32 PM EDT | Severe Thunderstorm Warning | RNK | 73 min |
| Jun 29, 10:44 PM EDT | Severe Thunderstorm Warning | RNK | 22 min |
| Jun 30, 3:06 PM EDT | Heat Advisory | RNK | 29 hr |
| Jun 30, 4:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 7:39 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 10:18 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Jul 1, 9:44 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 1, 11:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 1, 12:53 PM EDT | Severe Thunderstorm Warning | RNK | 52 min |
| Jul 1, 12:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 1:45 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jul 1, 7:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 1, 9:06 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 2, 12:39 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 2, 1:12 AM EDT | Severe Thunderstorm Warning | RNK | 93 min |
| Jul 3, 4:15 PM EDT | Severe Thunderstorm Warning | RNK | 42 min |
| Jul 3, 6:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 5, 3:48 AM EDT | Heat Advisory | RNK | 16 hr |
| Jul 5, 1:19 PM EDT | Special Weather Statement | RNK | 56 min |
| Jul 5, 2:54 PM EDT | Special Weather Statement | RNK | 51 min |
| Jul 5, 4:37 PM EDT | Special Weather Statement | RNK | 23 min |
| Jul 5, 4:46 PM EDT | Severe Thunderstorm Warning | RNK | 36 min |
| Jul 6, 3:59 AM EDT | Heat Advisory | RNK | 40 hr |
| Jul 6, 6:12 PM EDT | Special Weather Statement | RNK | 63 min |
| Jul 7, 1:17 PM EDT | Excessive Heat Warning | RNK | 7 hr |
| Jul 7, 3:33 PM EDT | Heat Advisory | RNK | 27 hr |
| Jul 9, 1:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 9, 3:19 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 9, 5:49 PM EDT | Special Weather Statement | RNK | 56 min |
| Jul 9, 5:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 9, 6:29 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 9, 7:14 PM EDT | Areal Flood Advisory | RNK | 106 min |
| Jul 14, 11:52 AM EDT | Flash Flood Watch | RNK | 9 hr |
| Jul 14, 2:17 PM EDT | Special Weather Statement | RNK | 28 min |
| Jul 16, 5:10 PM EDT | Special Weather Statement | RNK | 65 min |
| Jul 16, 6:54 PM EDT | Special Weather Statement | RNK | 51 min |
| Jul 19, 4:01 PM EDT | Special Weather Statement | RNK | 44 min |
| Jul 20, 2:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 2:06 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 21, 2:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 3:33 PM EDT | Special Weather Statement | RNK | 57 min |
| Jul 21, 5:04 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jul 21, 5:15 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jul 21, 5:37 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Jul 21, 5:40 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Jul 23, 12:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 4:49 PM EDT | Special Weather Statement | RNK | 56 min |
| Jul 24, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 5:36 AM EDT | Heat Advisory | RNK | 13 hr |
| Jul 27, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 4:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 27, 5:01 PM EDT | Special Weather Statement | RNK | 59 min |
| Jul 28, 6:59 PM EDT | Special Weather Statement | RNK | 61 min |
| Jul 29, 10:02 PM EDT | Special Weather Statement | RNK | 58 min |
| Aug 6, 8:35 PM EDT | Special Weather Statement | RNK | 55 min |
| Aug 6, 9:21 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Aug 8, 1:27 PM EDT | Severe Thunderstorm Warning | RNK | 63 min |
| Aug 10, 12:17 AM EDT | Special Weather Statement | RNK | 58 min |
| Aug 10, 7:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 11, 5:14 AM EDT | Special Weather Statement | RNK | 61 min |
| Aug 11, 1:30 PM EDT | Special Weather Statement | RNK | 30 min |
| Aug 11, 2:08 PM EDT | Special Weather Statement | RNK | 52 min |
| Aug 15, 3:27 PM EDT | Severe Thunderstorm Warning | RNK | 43 min |
| Aug 28, 7:19 PM EDT | Special Weather Statement | RNK | 56 min |
| Aug 28, 8:38 PM EDT | Special Weather Statement | RNK | 67 min |
| Aug 28, 9:44 PM EDT | Special Weather Statement | RNK | 61 min |
| Sep 2, 6:16 PM EDT | Severe Thunderstorm Warning | RNK | 59 min |
| Sep 2, 8:05 PM EDT | Severe Thunderstorm Warning | RNK | 85 min |
| Sep 3, 1:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 3, 2:46 PM EDT | Areal Flood Advisory | RNK | 108 min |
| Sep 6, 3:50 PM EDT | Special Weather Statement | RNK | 40 min |
| Sep 8, 12:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 8, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 8, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Sep 8, 3:48 PM EDT | Special Weather Statement | RNK | 57 min |
| Sep 8, 5:30 PM EDT | Special Weather Statement | RNK | 30 min |
| Sep 18, 8:38 AM EDT | Special Weather Statement | RNK | 52 min |
| Sep 18, 8:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 18, 10:54 AM EDT | Tornado Watch | SPC | 9 hr |
| Sep 18, 11:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Sep 18, 12:33 PM EDT | Special Weather Statement | RNK | 57 min |
| Sep 18, 1:43 PM EDT | Special Weather Statement | RNK | 47 min |
| Sep 22, 4:53 PM EDT | Special Weather Statement | RNK | 52 min |
| Sep 22, 5:47 PM EDT | Special Weather Statement | RNK | 58 min |
| Sep 22, 8:44 PM EDT | Special Weather Statement | RNK | 61 min |
| Sep 22, 9:45 PM EDT | Special Weather Statement | RNK | 60 min |
| Sep 28, 2:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 28, 3:19 PM EDT | Special Weather Statement | RNK | 41 min |
| Oct 18, 8:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 21, 4:00 PM EDT | Frost Advisory | RNK | 17 hr |
| Oct 28, 5:10 PM EDT | Wind Advisory | RNK | 42 hr |
| Nov 2, 4:06 PM EDT | Frost Advisory | RNK | 17 hr |
| Dec 9, 10:28 PM EST | Dense Fog Advisory | RNK | 10 hr |
| Dec 20, 5:17 AM EST | Wind Advisory | RNK | 58 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 | 22 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 34 |
| Special Weather Statement | 47 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.