Alert archive / North Carolina / Durham County
Weather alerts in Durham County, North Carolina, 2023
157 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Durham County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 157
- Warnings
- 35
- Watches
- 21
- Advisories
- 45
- Busiest month
- July33 alerts
- Busiest day
- August 15, 20239 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Durham County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 18 | 10% | 18 | 83% | 21 min |
| Flash flood warnings | 6 | 3 | 50% | 6 | 100% | 76 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Raleigh, NC: tornado warnings | 14 | 2 | 86% | 3 | 100% | 11 min |
| NWS Raleigh, NC: severe thunderstorm warnings | 221 | 179 | 19% | 513 | 86% | 23 min |
| NWS Raleigh, NC: flash flood warnings | 49 | 25 | 49% | 90 | 78% | 44 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 1, 10:18 PM EST | Dense Fog Advisory | RAH | 12 hr |
| Jan 4, 12:26 PM EST | Special Weather Statement | RAH | 49 min |
| Jan 5, 6:19 AM EST | Dense Fog Advisory | RAH | 4 hr |
| Jan 9, 5:03 AM EST | Dense Fog Advisory | RAH | 3 hr |
| Jan 12, 5:54 PM EST | Mesoscale Discussion | SPC | 96 min |
| Jan 12, 8:20 PM EST | Special Weather Statement | RAH | 40 min |
| Jan 12, 8:45 PM EST | Severe Thunderstorm Warning | RAH | 45 min |
| Jan 31, 2:29 AM EST | Dense Fog Advisory | RAH | 8 hr |
| Feb 5, 7:15 PM EST | Dense Fog Advisory | RAH | 9 hr |
| Mar 12, 3:12 PM EDT | Freeze Watch | RAH | 12 hr |
| Mar 13, 3:21 AM EDT | Freeze Watch | RAH | 25 hr |
| Mar 13, 3:21 AM EDT | Freeze Warning | RAH | 30 hr |
| Mar 14, 3:55 AM EDT | Freeze Warning | RAH | 30 hr |
| Mar 14, 2:59 PM EDT | Freeze Watch | RAH | 12 hr |
| Mar 15, 3:22 AM EDT | Freeze Warning | RAH | 30 hr |
| Mar 17, 2:44 PM EDT | Freeze Watch | RAH | 13 hr |
| Mar 18, 3:30 AM EDT | Freeze Watch | RAH | 11 hr |
| Mar 18, 3:30 AM EDT | Freeze Warning | RAH | 30 hr |
| Mar 18, 2:48 PM EDT | Freeze Warning | RAH | 43 hr |
| Mar 19, 3:30 AM EDT | Freeze Watch | RAH | 30 hr |
| Mar 20, 9:27 AM EDT | Freeze Warning | RAH | 24 hr |
| Mar 27, 2:58 AM EDT | Special Weather Statement | RAH | 62 min |
| Mar 31, 12:00 PM EDT | Wind Advisory | RAH | 36 hr |
| Apr 1, 9:23 AM EDT | Special Weather Statement | RAH | 37 min |
| Apr 1, 9:55 AM EDT | Special Weather Statement | RAH | 35 min |
| Apr 7, 9:51 AM EDT | Special Weather Statement | RAH | 54 min |
| Apr 7, 10:46 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Apr 7, 11:11 AM EDT | Flash Flood Warning | RAH | 3 hr |
| Apr 7, 2:12 PM EDT | Areal Flood Advisory | RAH | 5 hr |
| Apr 7, 5:57 PM EDT | Areal Flood Warning | RAH | 7 hr |
| Apr 9, 2:37 PM EDT | Frost Advisory | RAH | 18 hr |
| Apr 10, 9:35 AM EDT | Frost Advisory | RAH | 23 hr |
| Apr 14, 9:57 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Apr 22, 8:07 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 22, 9:34 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 22, 10:07 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Apr 22, 10:15 AM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Apr 22, 5:28 PM EDT | Special Weather Statement | RAH | 62 min |
| Apr 28, 3:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 30, 2:35 PM EDT | Severe Thunderstorm Warning | RAH | 40 min |
| May 9, 1:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 9, 8:22 PM EDT | Special Weather Statement | RAH | 38 min |
| May 16, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 16, 4:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 16, 7:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 16, 8:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 12, 1:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 16, 3:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 4:59 PM EDT | Special Weather Statement | RAH | 46 min |
| Jun 16, 5:17 PM EDT | Severe Thunderstorm Warning | RAH | 31 min |
| Jun 19, 2:58 PM EDT | Special Weather Statement | RAH | 62 min |
| Jun 19, 3:19 PM EDT | Severe Thunderstorm Warning | RAH | 41 min |
| Jun 20, 10:42 AM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jun 20, 6:35 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jun 22, 2:53 AM EDT | Flood Watch | RAH | 27 hr |
| Jun 22, 8:11 AM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jun 23, 2:15 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 23, 6:49 AM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jun 23, 4:24 PM EDT | Special Weather Statement | RAH | 66 min |
| Jun 23, 5:19 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 23, 5:31 PM EDT | Special Weather Statement | RAH | 59 min |
| Jun 23, 5:49 PM EDT | Flash Flood Warning | RAH | 2 hr |
| Jun 23, 5:54 PM EDT | Severe Thunderstorm Warning | RAH | 35 min |
| Jun 23, 6:33 PM EDT | Special Weather Statement | RAH | 42 min |
| Jun 23, 9:34 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 26, 12:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 4:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 26, 7:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 9:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 10:30 PM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Jun 26, 10:48 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 30, 9:31 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jun 30, 9:56 PM EDT | Flash Flood Warning | RAH | 4 hr |
| Jul 1, 3:26 PM EDT | Heat Advisory | RAH | 29 hr |
| Jul 1, 4:54 PM EDT | Severe Thunderstorm Warning | RAH | 51 min |
| Jul 1, 5:25 PM EDT | Severe Thunderstorm Warning | RAH | 50 min |
| Jul 2, 2:28 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 2, 2:56 PM EDT | Heat Advisory | RAH | 29 hr |
| Jul 2, 4:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 3, 3:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 6, 4:38 PM EDT | Special Weather Statement | RAH | 37 min |
| Jul 6, 5:37 PM EDT | Special Weather Statement | RAH | 23 min |
| Jul 7, 9:05 PM EDT | Special Weather Statement | RAH | 55 min |
| Jul 9, 11:23 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 9, 12:03 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 9, 12:31 PM EDT | Severe Thunderstorm Warning | RAH | 44 min |
| Jul 9, 12:58 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jul 9, 1:12 PM EDT | Severe Thunderstorm Warning | RAH | 48 min |
| Jul 9, 1:18 PM EDT | Flash Flood Warning | RAH | 102 min |
| Jul 14, 1:34 AM EDT | Areal Flood Advisory | RAH | 4 hr |
| Jul 14, 2:25 AM EDT | Areal Flood Advisory | RAH | 74 min |
| Jul 14, 3:16 AM EDT | Flood Watch | RAH | 21 hr |
| Jul 14, 4:19 AM EDT | Areal Flood Advisory | RAH | 86 min |
| Jul 14, 5:45 AM EDT | Flash Flood Warning | RAH | 105 min |
| Jul 14, 8:52 AM EDT | Areal Flood Advisory | RAH | 112 min |
| Jul 14, 1:38 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 19, 9:30 AM EDT | Special Weather Statement | RAH | 45 min |
| Jul 24, 1:41 AM EDT | Severe Thunderstorm Warning | RAH | 38 min |
| Jul 24, 2:24 AM EDT | Special Weather Statement | RAH | 51 min |
| Jul 27, 3:04 PM EDT | Heat Advisory | RAH | 53 hr |
| Jul 29, 2:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 31, 6:47 PM EDT | Special Weather Statement | RAH | 58 min |
| Jul 31, 6:53 PM EDT | Severe Thunderstorm Warning | RAH | 34 min |
| Jul 31, 7:19 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jul 31, 8:24 PM EDT | Special Weather Statement | RAH | 51 min |
| Aug 5, 3:57 AM EDT | Dense Fog Advisory | RAH | 5 hr |
| Aug 6, 3:46 PM EDT | Heat Advisory | RAH | 27 hr |
| Aug 6, 6:50 PM EDT | Special Weather Statement | RAH | 55 min |
| Aug 7, 4:30 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 5:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 7, 7:04 PM EDT | Severe Thunderstorm Warning | RAH | 56 min |
| Aug 12, 2:40 PM EDT | Heat Advisory | RAH | 29 hr |
| Aug 13, 3:10 PM EDT | Heat Advisory | RAH | 27 hr |
| Aug 14, 1:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 3:31 PM EDT | Heat Advisory | RAH | 26 hr |
| Aug 15, 1:26 PM EDT | Special Weather Statement | RAH | 34 min |
| Aug 15, 1:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 15, 1:45 PM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Aug 15, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 15, 2:06 PM EDT | Special Weather Statement | RAH | 84 min |
| Aug 15, 2:16 PM EDT | Severe Thunderstorm Warning | RAH | 44 min |
| Aug 15, 3:51 PM EDT | Severe Thunderstorm Warning | RAH | 39 min |
| Aug 15, 3:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Aug 15, 4:22 PM EDT | Severe Thunderstorm Warning | RAH | 38 min |
| Aug 27, 8:27 PM EDT | Special Weather Statement | RAH | 63 min |
| Aug 27, 8:40 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Aug 27, 8:59 PM EDT | Flash Flood Warning | RAH | 105 min |
| Aug 27, 10:16 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Aug 29, 2:26 PM EDT | Flood Watch | RAH | 43 hr |
| Aug 29, 6:49 PM EDT | Special Weather Statement | RAH | 56 min |
| Sep 8, 3:46 PM EDT | Severe Thunderstorm Warning | RAH | 44 min |
| Sep 8, 4:21 PM EDT | Special Weather Statement | RAH | 54 min |
| Sep 8, 4:30 PM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Sep 9, 9:12 AM EDT | Special Weather Statement | RAH | 63 min |
| Sep 9, 9:22 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Sep 9, 10:25 AM EDT | Special Weather Statement | RAH | 65 min |
| Sep 12, 3:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 22, 3:40 AM EDT | Flood Watch | RAH | 39 hr |
| Sep 23, 3:46 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Oct 7, 2:32 AM EDT | Dense Fog Advisory | RAH | 5 hr |
| Oct 13, 12:28 AM EDT | Dense Fog Advisory | RAH | 11 hr |
| Oct 20, 3:10 PM EDT | Special Weather Statement | RAH | 50 min |
| Oct 20, 6:31 PM EDT | Special Weather Statement | RAH | 59 min |
| Oct 23, 2:22 PM EDT | Frost Advisory | RAH | 19 hr |
| Oct 31, 4:11 AM EDT | Freeze Watch | RAH | 24 hr |
| Oct 31, 3:04 PM EDT | Frost Advisory | RAH | 19 hr |
| Nov 1, 3:53 AM EDT | Freeze Warning | RAH | 29 hr |
| Nov 22, 12:03 AM EST | Special Weather Statement | RAH | 42 min |
| Nov 22, 12:23 AM EST | Special Weather Statement | RAH | 67 min |
| Dec 2, 6:51 PM EST | Dense Fog Advisory | RAH | 5 hr |
| Dec 10, 12:36 PM EST | Mesoscale Discussion | SPC | 114 min |
| Dec 10, 1:31 PM EST | Tornado Watch | SPC | 8 hr |
| Dec 10, 10:02 PM EST | Areal Flood Advisory | RAH | 2 hr |
| Dec 17, 3:43 AM EST | Flood Watch | RAH | 24 hr |
| Dec 17, 4:41 PM EST | Areal Flood Advisory | RAH | 6 hr |
| Dec 17, 6:01 PM EST | Areal Flood Warning | RAH | 4 hr |
| Dec 17, 11:47 PM EST | Areal Flood Advisory | RAH | 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 | 20 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 32 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 6 |
| Flood Watch | 5 |
| Areal Flood Advisory | 24 |
| Heat | |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 7 |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.