Alert archive / North Carolina / Durham County
Weather alerts in Durham County, North Carolina, 2018
193 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 193
- Warnings
- 53
- Watches
- 14
- Advisories
- 40
- Busiest month
- August33 alerts
- Busiest day
- August 2, 201812 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 Durham County in 2018 had a tornado report inside them.
Durham County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 21 | 19 | 10% | 12 | 100% | 18 min |
| Flash flood warnings | 13 | 8 | 38% | 4 | 75% | 87 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Raleigh, NC: tornado warnings | 28 | 6 | 79% | 16 | 94% | 7 min |
| NWS Raleigh, NC: severe thunderstorm warnings | 231 | 166 | 28% | 427 | 81% | 22 min |
| NWS Raleigh, NC: flash flood warnings | 74 | 57 | 23% | 235 | 93% | 439 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, 3:36 PM EST | Wind Chill Advisory | RAH | 17 hr |
| Jan 2, 2:30 PM EST | Winter Weather Advisory | RAH | 4 days |
| Jan 4, 4:05 AM EST | Wind Chill Advisory | RAH | 30 hr |
| Jan 5, 4:04 AM EST | Wind Chill Advisory | RAH | 30 hr |
| Jan 12, 3:38 PM EST | Special Weather Statement | RAH | 82 min |
| Jan 12, 6:46 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 12, 6:58 PM EST | Special Weather Statement | RAH | 92 min |
| Jan 12, 8:11 PM EST | Special Weather Statement | RAH | 94 min |
| Jan 16, 2:55 AM EST | Winter Weather Advisory | RAH | 3 days |
| Jan 16, 2:50 PM EST | Winter Storm Warning | RAH | 32 hr |
| Jan 17, 7:21 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 17, 9:20 AM EST | Special Weather Statement | RAH | 85 min |
| Jan 23, 4:05 AM EST | Special Weather Statement | RAH | 55 min |
| Jan 23, 4:52 AM EST | Special Weather Statement | RAH | 53 min |
| Jan 23, 12:05 PM EST | Wind Advisory | RAH | 6 hr |
| Feb 4, 2:29 PM EST | Special Weather Statement | RAH | 91 min |
| Feb 19, 10:45 PM EST | Dense Fog Advisory | RAH | 13 hr |
| Mar 1, 1:28 PM EST | Wind Advisory | RAH | 32 hr |
| Mar 2, 3:52 AM EST | High Wind Warning | RAH | 17 hr |
| Mar 11, 3:25 PM EDT | Winter Weather Advisory | RAH | 43 hr |
| Mar 15, 9:14 AM EDT | Red Flag Warning | RAH | 10 hr |
| Mar 17, 11:25 PM EDT | Special Weather Statement | RAH | 35 min |
| Mar 20, 9:34 PM EDT | Winter Weather Advisory | RAH | 13 hr |
| Mar 24, 3:04 PM EDT | Winter Weather Advisory | RAH | 13 hr |
| Apr 4, 7:43 PM EDT | Freeze Warning | RAH | 12 hr |
| Apr 5, 9:42 PM EDT | Frost Advisory | RAH | 9 hr |
| Apr 7, 4:07 AM EDT | Freeze Warning | RAH | 29 hr |
| Apr 15, 11:30 AM EDT | Flash Flood Watch | RAH | 14 hr |
| Apr 15, 2:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 15, 3:02 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 15, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Apr 15, 6:08 PM EDT | Severe Thunderstorm Warning | RAH | 67 min |
| Apr 15, 7:08 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Apr 15, 8:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 15, 8:50 PM EDT | Flash Flood Warning | RAH | 4 hr |
| Apr 15, 9:10 PM EDT | Special Weather Statement | RAH | 80 min |
| Apr 15, 9:50 PM EDT | Severe Thunderstorm Warning | RAH | 40 min |
| Apr 16, 2:58 PM EDT | Frost Advisory | RAH | 18 hr |
| Apr 19, 3:17 AM EDT | Frost Advisory | RAH | 29 hr |
| Apr 25, 11:20 AM EDT | Special Weather Statement | RAH | 40 min |
| May 6, 2:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 6, 2:46 PM EDT | Special Weather Statement | RAH | 59 min |
| May 6, 3:32 PM EDT | Special Weather Statement | RAH | 43 min |
| May 10, 3:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 10, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 10, 5:05 PM EDT | Severe Thunderstorm Warning | RAH | 55 min |
| May 10, 5:50 PM EDT | Special Weather Statement | RAH | 55 min |
| May 10, 6:08 PM EDT | Severe Thunderstorm Warning | RAH | 48 min |
| May 10, 7:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 10, 7:55 PM EDT | Special Weather Statement | RAH | 35 min |
| May 18, 2:41 PM EDT | Flash Flood Watch | RAH | 28 hr |
| May 18, 11:06 PM EDT | Special Weather Statement | RAH | 54 min |
| May 21, 2:44 PM EDT | Special Weather Statement | RAH | 31 min |
| May 21, 3:29 PM EDT | Severe Thunderstorm Warning | RAH | 28 min |
| May 21, 3:49 PM EDT | Special Weather Statement | RAH | 26 min |
| May 21, 4:05 PM EDT | Areal Flood Advisory | RAH | 76 min |
| May 21, 4:14 PM EDT | Special Weather Statement | RAH | 46 min |
| May 21, 4:25 PM EDT | Flash Flood Warning | RAH | 39 min |
| May 21, 8:09 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| May 21, 8:25 PM EDT | Flash Flood Warning | RAH | 3 hr |
| May 23, 3:34 PM EDT | Special Weather Statement | RAH | 41 min |
| May 23, 3:51 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 4:40 AM EDT | Flash Flood Watch | RAH | 47 hr |
| Jun 2, 4:46 PM EDT | Special Weather Statement | RAH | 59 min |
| Jun 10, 3:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 11:09 PM EDT | Special Weather Statement | RAH | 66 min |
| Jun 10, 11:29 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Jun 11, 1:05 AM EDT | Special Weather Statement | RAH | 55 min |
| Jun 20, 2:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 3:30 PM EDT | Special Weather Statement | RAH | 45 min |
| Jun 22, 3:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 24, 7:02 PM EDT | Special Weather Statement | RAH | 43 min |
| Jun 24, 7:48 PM EDT | Severe Thunderstorm Warning | RAH | 42 min |
| Jun 26, 10:49 AM EDT | Special Weather Statement | RAH | 86 min |
| Jun 26, 3:03 PM EDT | Special Weather Statement | RAH | 57 min |
| Jun 26, 3:53 PM EDT | Special Weather Statement | RAH | 52 min |
| Jun 29, 2:16 PM EDT | Heat Advisory | RAH | 27 hr |
| Jul 4, 6:42 PM EDT | Special Weather Statement | RAH | 48 min |
| Jul 5, 6:17 PM EDT | Special Weather Statement | RAH | 28 min |
| Jul 5, 6:32 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jul 5, 6:54 PM EDT | Flash Flood Warning | RAH | 115 min |
| Jul 5, 7:00 PM EDT | Special Weather Statement | RAH | 30 min |
| Jul 6, 4:18 PM EDT | Severe Thunderstorm Warning | RAH | 57 min |
| Jul 6, 4:30 PM EDT | Areal Flood Advisory | RAH | 94 min |
| Jul 17, 6:38 PM EDT | Special Weather Statement | RAH | 52 min |
| Jul 22, 12:26 AM EDT | Special Weather Statement | RAH | 79 min |
| Jul 22, 8:52 PM EDT | Special Weather Statement | RAH | 38 min |
| Jul 22, 9:02 PM EDT | Severe Thunderstorm Warning | RAH | 73 min |
| Jul 23, 3:14 AM EDT | Flash Flood Watch | RAH | 47 hr |
| Jul 23, 1:24 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 25, 12:30 PM EDT | Special Weather Statement | RAH | 45 min |
| Jul 29, 6:36 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Jul 29, 6:58 PM EDT | Special Weather Statement | RAH | 32 min |
| Jul 29, 7:04 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jul 29, 7:28 PM EDT | Special Weather Statement | RAH | 32 min |
| Jul 31, 2:41 PM EDT | Areal Flood Advisory | RAH | 93 min |
| Aug 1, 10:20 PM EDT | Flash Flood Watch | RAH | 46 hr |
| Aug 2, 12:12 PM EDT | Special Weather Statement | RAH | 63 min |
| Aug 2, 12:18 PM EDT | Areal Flood Advisory | RAH | 117 min |
| Aug 2, 12:47 PM EDT | Special Weather Statement | RAH | 43 min |
| Aug 2, 2:04 PM EDT | Special Weather Statement | RAH | 56 min |
| Aug 2, 2:34 PM EDT | Severe Thunderstorm Warning | RAH | 41 min |
| Aug 2, 2:43 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Aug 2, 2:58 PM EDT | Severe Thunderstorm Warning | RAH | 47 min |
| Aug 2, 3:11 PM EDT | Severe Thunderstorm Warning | RAH | 24 min |
| Aug 2, 3:32 PM EDT | Flash Flood Warning | RAH | 3 hr |
| Aug 2, 3:32 PM EDT | Severe Thunderstorm Warning | RAH | 43 min |
| Aug 2, 3:39 PM EDT | Severe Thunderstorm Warning | RAH | 51 min |
| Aug 3, 2:07 AM EDT | Special Weather Statement | RAH | 38 min |
| Aug 3, 2:50 PM EDT | Severe Thunderstorm Warning | RAH | 40 min |
| Aug 3, 3:30 PM EDT | Special Weather Statement | RAH | 45 min |
| Aug 7, 7:37 PM EDT | Severe Thunderstorm Warning | RAH | 53 min |
| Aug 7, 11:11 PM EDT | Special Weather Statement | RAH | 49 min |
| Aug 8, 4:24 PM EDT | Special Weather Statement | RAH | 66 min |
| Aug 8, 4:38 PM EDT | Severe Thunderstorm Warning | RAH | 52 min |
| Aug 8, 5:42 PM EDT | Severe Thunderstorm Warning | RAH | 63 min |
| Aug 8, 6:15 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Aug 8, 6:24 PM EDT | Flash Flood Warning | RAH | 3 hr |
| Aug 11, 2:56 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 2:45 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 18, 5:43 PM EDT | Special Weather Statement | RAH | 47 min |
| Aug 19, 10:21 PM EDT | Special Weather Statement | RAH | 54 min |
| Aug 19, 10:28 PM EDT | Severe Thunderstorm Warning | RAH | 47 min |
| Aug 19, 11:53 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Aug 20, 12:29 AM EDT | Flash Flood Warning | RAH | 3 hr |
| Aug 27, 3:23 PM EDT | Special Weather Statement | RAH | 37 min |
| Aug 30, 10:45 PM EDT | Special Weather Statement | RAH | 45 min |
| Aug 31, 1:16 AM EDT | Special Weather Statement | RAH | 89 min |
| Aug 31, 1:36 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Sep 2, 5:18 PM EDT | Special Weather Statement | RAH | 42 min |
| Sep 10, 8:14 PM EDT | Special Weather Statement | RAH | 61 min |
| Sep 12, 4:35 AM EDT | Flash Flood Watch | RAH | 5 days |
| Sep 14, 5:50 PM EDT | Areal Flood Advisory | RAH | 4 hr |
| Sep 14, 6:45 PM EDT | Special Weather Statement | RAH | 60 min |
| Sep 14, 6:57 PM EDT | Flash Flood Warning | RAH | 4 hr |
| Sep 14, 7:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 15, 2:43 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Sep 15, 6:06 AM EDT | Areal Flood Advisory | RAH | 6 hr |
| Sep 15, 1:12 PM EDT | Flash Flood Warning | RAH | 9 hr |
| Sep 16, 8:13 AM EDT | Areal Flood Advisory | RAH | 6 hr |
| Sep 16, 9:51 PM EDT | Special Weather Statement | RAH | 24 min |
| Sep 17, 3:21 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Sep 17, 5:13 AM EDT | Flash Flood Warning | RAH | 9 hr |
| Sep 17, 5:45 AM EDT | Special Weather Statement | RAH | 45 min |
| Sep 17, 7:03 AM EDT | Flash Flood Warning | RAH | 3 hr |
| Sep 17, 7:32 AM EDT | Tornado Warning | RAH | 17 min |
| Sep 17, 7:52 AM EDT | Special Weather Statement | RAH | 23 min |
| Sep 17, 7:54 AM EDT | Special Weather Statement | RAH | 36 min |
| Sep 17, 8:15 AM EDT | Tornado Warning | RAH | 30 min |
| Sep 17, 1:57 PM EDT | Areal Flood Warning | RAH | 4 hr |
| Sep 17, 4:11 PM EDT | Severe Thunderstorm Warning | RAH | 79 min |
| Sep 17, 5:45 PM EDT | Areal Flood Warning | RAH | 3 hr |
| Sep 17, 8:09 PM EDT | Areal Flood Warning | RAH | 24 hr |
| Sep 18, 4:01 PM EDT | Areal Flood Warning | RAH | 53 hr |
| Sep 26, 7:29 PM EDT | Special Weather Statement | RAH | 61 min |
| Sep 27, 2:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 27, 5:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 27, 11:38 PM EDT | Special Weather Statement | RAH | 52 min |
| Oct 9, 4:04 PM EDT | Flash Flood Watch | RAH | 52 hr |
| Oct 10, 11:02 AM EDT | Tropical Storm Warning | RAH | 36 hr |
| Oct 11, 8:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Oct 11, 9:58 AM EDT | Tornado Watch | SPC | 13 hr |
| Oct 11, 11:17 AM EDT | Areal Flood Advisory | RAH | 6 hr |
| Oct 11, 12:25 PM EDT | Flash Flood Warning | RAH | 9 hr |
| Oct 11, 4:16 PM EDT | Severe Thunderstorm Warning | RAH | 59 min |
| Oct 11, 6:14 PM EDT | Special Weather Statement | RAH | 61 min |
| Oct 21, 3:56 AM EDT | Frost Advisory | RAH | 29 hr |
| Nov 2, 3:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Nov 2, 7:26 PM EDT | Special Weather Statement | RAH | 64 min |
| Nov 6, 4:36 AM EST | Dense Fog Advisory | RAH | 115 min |
| Nov 6, 12:26 PM EST | Special Weather Statement | RAH | 64 min |
| Nov 6, 1:44 PM EST | Special Weather Statement | RAH | 61 min |
| Nov 9, 10:46 AM EST | Freeze Watch | RAH | 17 hr |
| Nov 10, 3:36 AM EST | Freeze Warning | RAH | 29 hr |
| Nov 12, 8:49 PM EST | Flash Flood Warning | RAH | 8 hr |
| Nov 12, 10:07 PM EST | Areal Flood Advisory | RAH | 9 hr |
| Nov 13, 4:48 AM EST | Areal Flood Warning | RAH | 6 hr |
| Nov 14, 3:36 AM EST | Flood Watch | RAH | 35 hr |
| Nov 17, 2:08 AM EST | Areal Flood Warning | RAH | 6 hr |
| Nov 17, 7:57 AM EST | Areal Flood Warning | RAH | 72 hr |
| Nov 20, 7:09 AM EST | Areal Flood Warning | RAH | 24 hr |
| Nov 21, 6:50 AM EST | Areal Flood Warning | RAH | 24 hr |
| Dec 2, 11:14 AM EST | Special Weather Statement | RAH | 61 min |
| Dec 6, 3:41 PM EST | Winter Storm Watch | RAH | 36 hr |
| Dec 7, 3:54 PM EST | Winter Storm Warning | RAH | 60 hr |
| Dec 8, 3:45 AM EST | Winter Weather Advisory | RAH | 3 days |
| Dec 9, 3:08 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 9, 8:18 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 9, 12:34 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 3:00 PM EST | Winter Weather Advisory | RAH | 19 hr |
| Dec 13, 3:33 AM EST | Flash Flood Watch | RAH | 59 hr |
| Dec 21, 2:33 PM EST | Mesoscale Discussion | SPC | 57 min |
| Dec 31, 5:18 AM EST | Dense Fog Advisory | RAH | 4 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 | 21 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 62 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 13 |
| Flash Flood Watch | 8 |
| Flood Watch | 1 |
| Areal Flood Advisory | 20 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 2 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.