Alert archive / North Carolina / Chatham County
Weather alerts in Chatham County, North Carolina, 2013
130 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chatham County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 130
- Warnings
- 20
- Watches
- 13
- Advisories
- 35
- Busiest month
- June42 alerts
- Busiest day
- June 30, 20139 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 Chatham County in 2013 had a tornado report inside them.
Chatham County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 14 | 14 | 0% | 9 | 100% | 28 min |
| Flash flood warnings | 2 | 2 | 0% | 5 | 100% | 38 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Raleigh, NC: tornado warnings | 11 | 4 | 64% | 6 | 83% | 10 min |
| NWS Raleigh, NC: severe thunderstorm warnings | 137 | 103 | 25% | 372 | 90% | 24 min |
| NWS Raleigh, NC: flash flood warnings | 48 | 32 | 33% | 119 | 97% | 62 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 11, 2:12 PM EST | Dense Fog Advisory | RAH | 21 hr |
| Jan 12, 9:08 PM EST | Dense Fog Advisory | RAH | 14 hr |
| Jan 16, 3:44 PM EST | Winter Storm Watch | RAH | 12 hr |
| Jan 17, 3:56 AM EST | Winter Storm Warning | RAH | 22 hr |
| Jan 17, 6:54 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 18, 2:38 AM EST | River Flood Warning | RAH | 11 hr |
| Jan 18, 3:43 PM EST | Winter Weather Advisory | RAH | 17 hr |
| Jan 24, 3:05 PM EST | Winter Weather Advisory | RAH | 44 hr |
| Jan 25, 12:43 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 25, 1:18 PM EST | Special Weather Statement | RAH | 42 min |
| Jan 25, 2:12 PM EST | Special Weather Statement | RAH | 78 min |
| Jan 27, 3:07 PM EST | Freezing Rain Advisory | RAH | 18 hr |
| Jan 29, 9:55 PM EST | Wind Advisory | RAH | 30 hr |
| Jan 30, 4:06 PM EST | Mesoscale Discussion | SPC | 114 min |
| Jan 30, 7:56 PM EST | Mesoscale Discussion | SPC | 94 min |
| Jan 30, 8:21 PM EST | Tornado Watch | SPC | 6 hr |
| Jan 30, 9:40 PM EST | Severe Thunderstorm Warning | RAH | 80 min |
| Jan 30, 10:42 PM EST | Mesoscale Discussion | SPC | 93 min |
| Feb 15, 3:51 PM EST | Winter Weather Advisory | RAH | 30 hr |
| Feb 16, 10:05 PM EST | Winter Weather Advisory | RAH | 12 hr |
| Feb 21, 3:36 PM EST | Winter Weather Advisory | RAH | 18 hr |
| Mar 5, 3:41 PM EST | Wind Advisory | RAH | 27 hr |
| Apr 2, 3:28 PM EDT | Frost Advisory | RAH | 17 hr |
| Apr 3, 4:10 AM EDT | Freeze Watch | RAH | 11 hr |
| Apr 3, 3:01 PM EDT | Frost Advisory | RAH | 6 hr |
| Apr 12, 1:58 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 12, 2:57 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 12, 3:27 AM EDT | Special Weather Statement | RAH | 63 min |
| Apr 12, 5:20 AM EDT | Severe Thunderstorm Warning | RAH | 40 min |
| Apr 12, 6:03 AM EDT | Special Weather Statement | RAH | 42 min |
| Apr 19, 12:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 19, 2:00 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 19, 4:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 19, 4:57 PM EDT | Severe Thunderstorm Warning | RAH | 48 min |
| Apr 19, 5:28 PM EDT | Tornado Warning | RAH | 32 min |
| Apr 19, 5:44 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Apr 19, 6:30 PM EDT | Severe Thunderstorm Warning | RAH | 15 min |
| May 6, 2:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 7, 5:30 PM EDT | Special Weather Statement | RAH | 45 min |
| May 9, 1:23 AM EDT | Dense Fog Advisory | RAH | 7 hr |
| May 11, 7:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| May 20, 2:18 PM EDT | Special Weather Statement | RAH | 57 min |
| May 21, 3:15 PM EDT | Special Weather Statement | RAH | 60 min |
| Jun 3, 2:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 3, 5:50 PM EDT | Special Weather Statement | RAH | 40 min |
| Jun 6, 4:15 AM EDT | Flash Flood Watch | RAH | 38 hr |
| Jun 7, 3:50 AM EDT | Areal Flood Advisory | RAH | 5 hr |
| Jun 7, 9:06 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 7, 1:29 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 7, 1:58 PM EDT | Flash Flood Warning | RAH | 2 hr |
| Jun 10, 3:50 AM EDT | Flash Flood Watch | RAH | 17 hr |
| Jun 10, 11:31 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 10, 12:57 PM EDT | Special Weather Statement | RAH | 63 min |
| Jun 10, 1:18 PM EDT | Tornado Watch | SPC | 9 hr |
| Jun 10, 4:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 4:36 PM EDT | Severe Thunderstorm Warning | RAH | 54 min |
| Jun 13, 11:38 AM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 13, 1:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 13, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 4:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 13, 4:31 PM EDT | Severe Thunderstorm Warning | RAH | 89 min |
| Jun 13, 5:03 PM EDT | Severe Thunderstorm Warning | RAH | 57 min |
| Jun 13, 5:39 PM EDT | Severe Thunderstorm Warning | RAH | 66 min |
| Jun 18, 7:10 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 23, 5:10 PM EDT | Special Weather Statement | RAH | 50 min |
| Jun 25, 4:42 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 26, 2:30 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 5:47 PM EDT | Special Weather Statement | RAH | 58 min |
| Jun 26, 6:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 26, 6:53 PM EDT | Special Weather Statement | RAH | 82 min |
| Jun 28, 1:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 28, 2:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 4:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 28, 5:50 PM EDT | Severe Thunderstorm Warning | RAH | 55 min |
| Jun 28, 9:52 PM EDT | Special Weather Statement | RAH | 3 hr |
| Jun 28, 10:58 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 30, 3:24 AM EDT | Special Weather Statement | RAH | 51 min |
| Jun 30, 4:10 AM EDT | Areal Flood Advisory | RAH | 110 min |
| Jun 30, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 2:42 PM EDT | Special Weather Statement | RAH | 33 min |
| Jun 30, 2:51 PM EDT | Special Weather Statement | RAH | 24 min |
| Jun 30, 3:02 PM EDT | Areal Flood Advisory | RAH | 118 min |
| Jun 30, 3:10 PM EDT | Severe Thunderstorm Warning | RAH | 50 min |
| Jun 30, 3:28 PM EDT | Flash Flood Watch | RAH | 3 days |
| Jun 30, 3:52 PM EDT | Flash Flood Warning | RAH | 3 hr |
| Jul 1, 6:08 AM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jul 3, 2:49 PM EDT | Special Weather Statement | RAH | 56 min |
| Jul 3, 7:16 PM EDT | Areal Flood Advisory | RAH | 74 min |
| Jul 10, 9:11 PM EDT | Special Weather Statement | RAH | 49 min |
| Jul 11, 10:46 AM EDT | Flash Flood Watch | RAH | 34 hr |
| Jul 11, 11:34 AM EDT | Special Weather Statement | RAH | 86 min |
| Jul 16, 7:49 PM EDT | Severe Thunderstorm Warning | RAH | 41 min |
| Jul 16, 8:22 PM EDT | Areal Flood Advisory | RAH | 98 min |
| Jul 16, 8:32 PM EDT | Special Weather Statement | RAH | 58 min |
| Jul 17, 2:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 24, 1:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 8:00 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jul 24, 8:55 PM EDT | Severe Thunderstorm Warning | RAH | 50 min |
| Jul 27, 1:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 27, 3:30 PM EDT | Special Weather Statement | RAH | 60 min |
| Jul 28, 10:35 PM EDT | Severe Thunderstorm Warning | RAH | 70 min |
| Aug 3, 12:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 10, 3:50 PM EDT | Special Weather Statement | RAH | 55 min |
| Aug 10, 4:45 PM EDT | Special Weather Statement | RAH | 45 min |
| Aug 13, 2:15 AM EDT | Special Weather Statement | RAH | 60 min |
| Aug 20, 2:33 AM EDT | Dense Fog Advisory | RAH | 6 hr |
| Aug 21, 3:08 PM EDT | Special Weather Statement | RAH | 67 min |
| Aug 21, 4:11 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Aug 21, 5:12 PM EDT | Areal Flood Advisory | RAH | 78 min |
| Aug 22, 2:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 1:14 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 1, 7:38 PM EDT | Special Weather Statement | RAH | 52 min |
| Sep 3, 11:12 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 21, 7:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 10:45 PM EDT | Special Weather Statement | RAH | 90 min |
| Oct 6, 6:22 AM EDT | Dense Fog Advisory | RAH | 4 hr |
| Oct 7, 1:17 PM EDT | Special Weather Statement | RAH | 58 min |
| Oct 7, 2:19 PM EDT | Special Weather Statement | RAH | 56 min |
| Oct 7, 2:32 PM EDT | Areal Flood Advisory | RAH | 118 min |
| Oct 23, 3:52 AM EDT | Frost Advisory | RAH | 29 hr |
| Oct 24, 2:57 PM EDT | Freeze Watch | RAH | 13 hr |
| Oct 25, 3:27 AM EDT | Freeze Warning | RAH | 30 hr |
| Nov 2, 5:24 PM EDT | Special Weather Statement | RAH | 96 min |
| Nov 17, 5:59 AM EST | Dense Fog Advisory | RAH | 5 hr |
| Nov 18, 5:36 AM EST | Special Weather Statement | RAH | 84 min |
| Dec 5, 12:39 AM EST | Dense Fog Advisory | RAH | 8 hr |
| Dec 7, 4:26 AM EST | Freezing Rain Advisory | RAH | 49 hr |
| Dec 17, 8:53 PM EST | Special Weather Statement | RAH | 52 min |
| Dec 23, 12:11 AM EST | Special Weather Statement | RAH | 64 min |
| Dec 26, 5:22 AM EST | Winter Weather Advisory | RAH | 5 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 | 14 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 29 |
| Special Weather Statement | 33 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 1 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 15 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20122014
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.