Alert archive / North Carolina / Orange County
Weather alerts in Orange County, North Carolina, 2019
124 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Orange County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 124
- Warnings
- 39
- Watches
- 16
- Advisories
- 18
- Busiest month
- April37 alerts
- Busiest day
- April 19, 201912 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 8 tornado warnings covering Orange County in 2019 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 7 minutes after it went out.
Orange County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 8 | 2 | 75% | 2 | 100% | 7 min |
| Severe thunderstorm warnings | 23 | 19 | 17% | 15 | 87% | 30 min |
| Flash flood warnings | 2 | 2 | 0% | 1 | 100% | 85 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Raleigh, NC: tornado warnings | 51 | 12 | 76% | 24 | 71% | 11 min |
| NWS Raleigh, NC: severe thunderstorm warnings | 252 | 192 | 24% | 676 | 81% | 21 min |
| NWS Raleigh, NC: flash flood warnings | 29 | 21 | 28% | 79 | 89% | 75 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, 3:53 PM EST | Winter Storm Watch | RAH | 12 hr |
| Jan 12, 3:48 AM EST | Winter Weather Advisory | RAH | 33 hr |
| Jan 20, 4:02 AM EST | Wind Advisory | RAH | 14 hr |
| Jan 24, 3:54 AM EST | Special Weather Statement | RAH | 81 min |
| Jan 24, 5:15 AM EST | Special Weather Statement | RAH | 90 min |
| Jan 30, 3:41 AM EST | Wind Advisory | RAH | 14 hr |
| Feb 19, 3:46 AM EST | Winter Weather Advisory | RAH | 32 hr |
| Feb 23, 12:31 PM EST | Areal Flood Advisory | RAH | 4 hr |
| Feb 23, 7:40 PM EST | Wind Advisory | RAH | 26 hr |
| Feb 28, 2:57 AM EST | Dense Fog Advisory | RAH | 7 hr |
| Mar 31, 4:16 AM EDT | Freeze Warning | RAH | 29 hr |
| Apr 2, 9:19 AM EDT | Special Weather Statement | RAH | 56 min |
| Apr 2, 12:06 PM EDT | Special Weather Statement | RAH | 69 min |
| Apr 2, 3:36 PM EDT | Frost Advisory | RAH | 17 hr |
| Apr 7, 3:35 AM EDT | Dense Fog Advisory | RAH | 7 hr |
| Apr 8, 1:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 8, 2:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 8, 4:20 PM EDT | Special Weather Statement | RAH | 55 min |
| Apr 8, 4:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 8, 4:59 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Apr 8, 5:17 PM EDT | Severe Thunderstorm Warning | RAH | 43 min |
| Apr 8, 5:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 8, 6:00 PM EDT | Special Weather Statement | RAH | 60 min |
| Apr 12, 1:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 12, 4:25 PM EDT | Severe Thunderstorm Warning | RAH | 65 min |
| Apr 12, 5:59 PM EDT | Areal Flood Advisory | RAH | 2 hr |
| Apr 13, 10:38 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Apr 13, 10:53 AM EDT | Flash Flood Watch | RAH | 7 hr |
| Apr 13, 11:36 AM EDT | Special Weather Statement | RAH | 39 min |
| Apr 13, 11:43 AM EDT | Areal Flood Advisory | RAH | 3 hr |
| Apr 13, 12:20 PM EDT | Flash Flood Warning | RAH | 6 hr |
| Apr 13, 6:12 PM EDT | Areal Flood Warning | RAH | 15 hr |
| Apr 14, 2:16 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 14, 10:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 14, 10:14 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 19, 9:45 AM EDT | Tornado Warning | RAH | 45 min |
| Apr 19, 10:31 AM EDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 3:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Apr 19, 3:47 PM EDT | Severe Thunderstorm Warning | RAH | 58 min |
| Apr 19, 3:51 PM EDT | Tornado Warning | RAH | 24 min |
| Apr 19, 4:00 PM EDT | Tornado Warning | RAH | 30 min |
| Apr 19, 4:13 PM EDT | Tornado Warning | RAH | 32 min |
| Apr 19, 4:26 PM EDT | Tornado Warning | RAH | 34 min |
| Apr 19, 4:35 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 19, 4:45 PM EDT | Severe Thunderstorm Warning | RAH | 60 min |
| Apr 19, 4:50 PM EDT | Tornado Warning | RAH | 25 min |
| Apr 19, 4:52 PM EDT | Tornado Warning | RAH | 53 min |
| Apr 26, 1:53 PM EDT | Special Weather Statement | RAH | 52 min |
| May 4, 5:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 13, 9:57 AM EDT | Severe Thunderstorm Warning | RAH | 48 min |
| May 26, 12:44 AM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| May 26, 12:55 AM EDT | Severe Thunderstorm Warning | RAH | 29 min |
| May 31, 12:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 31, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 31, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 31, 5:28 PM EDT | Severe Thunderstorm Warning | RAH | 47 min |
| May 31, 5:31 PM EDT | Severe Thunderstorm Warning | RAH | 44 min |
| May 31, 7:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 31, 9:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 5, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 5, 2:33 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 8, 8:35 PM EDT | Special Weather Statement | RAH | 55 min |
| Jun 10, 8:50 PM EDT | Special Weather Statement | RAH | 70 min |
| Jun 18, 8:08 PM EDT | Special Weather Statement | RAH | 82 min |
| Jun 18, 9:34 PM EDT | Special Weather Statement | RAH | 56 min |
| Jun 18, 10:35 PM EDT | Special Weather Statement | RAH | 55 min |
| Jun 18, 10:42 PM EDT | Flash Flood Warning | RAH | 3 hr |
| Jun 20, 12:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 20, 2:33 PM EDT | Severe Thunderstorm Warning | RAH | 57 min |
| Jun 20, 3:14 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Jun 24, 9:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 5:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 3:13 PM EDT | Severe Thunderstorm Warning | RAH | 29 min |
| Jul 7, 1:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 15, 9:05 PM EDT | Special Weather Statement | RAH | 40 min |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 18, 4:26 AM EDT | Excessive Heat Watch | RAH | 59 hr |
| Jul 18, 4:26 AM EDT | Heat Advisory | RAH | 39 hr |
| Jul 18, 4:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 19, 2:45 PM EDT | Excessive Heat Warning | RAH | 57 hr |
| Jul 19, 2:45 PM EDT | Heat Advisory | RAH | 57 hr |
| Jul 22, 6:43 PM EDT | Severe Thunderstorm Warning | RAH | 65 min |
| Jul 22, 8:14 PM EDT | Special Weather Statement | RAH | 46 min |
| Jul 23, 10:08 AM EDT | Flash Flood Watch | RAH | 7 hr |
| Jul 23, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 4:50 PM EDT | Severe Thunderstorm Warning | RAH | 28 min |
| Aug 5, 3:17 PM EDT | Areal Flood Advisory | RAH | 118 min |
| Aug 6, 3:22 PM EDT | Special Weather Statement | RAH | 38 min |
| Aug 7, 12:17 PM EDT | Special Weather Statement | RAH | 73 min |
| Aug 7, 12:45 PM EDT | Severe Thunderstorm Warning | RAH | 63 min |
| Aug 7, 12:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Aug 7, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 13, 2:58 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 13, 3:10 PM EDT | Severe Thunderstorm Warning | RAH | 29 min |
| Aug 13, 4:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 13, 5:05 PM EDT | Special Weather Statement | RAH | 40 min |
| Aug 13, 5:22 PM EDT | Severe Thunderstorm Warning | RAH | 38 min |
| Aug 14, 5:44 PM EDT | Special Weather Statement | RAH | 61 min |
| Aug 14, 6:26 PM EDT | Special Weather Statement | RAH | 64 min |
| Aug 15, 4:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 15, 9:27 PM EDT | Severe Thunderstorm Warning | RAH | 26 min |
| Aug 17, 4:17 PM EDT | Special Weather Statement | RAH | 58 min |
| Aug 17, 5:18 PM EDT | Special Weather Statement | RAH | 57 min |
| Aug 21, 6:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 21, 6:29 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Aug 22, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 22, 5:37 PM EDT | Special Weather Statement | RAH | 53 min |
| Aug 23, 2:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 11, 9:33 PM EDT | Special Weather Statement | RAH | 42 min |
| Oct 31, 3:39 PM EDT | Tornado Watch | SPC | 7 hr |
| Oct 31, 6:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Oct 31, 6:48 PM EDT | Severe Thunderstorm Warning | RAH | 72 min |
| Oct 31, 7:17 PM EDT | Severe Thunderstorm Warning | RAH | 58 min |
| Oct 31, 7:40 PM EDT | Severe Thunderstorm Warning | RAH | 80 min |
| Oct 31, 7:47 PM EDT | Tornado Warning | RAH | 43 min |
| Nov 1, 3:16 AM EDT | Freeze Warning | RAH | 30 hr |
| Nov 2, 3:16 PM EDT | Freeze Warning | RAH | 18 hr |
| Nov 3, 2:20 PM EST | Freeze Warning | RAH | 18 hr |
| Dec 13, 4:51 PM EST | Areal Flood Advisory | RAH | 4 hr |
| Dec 13, 9:51 PM EST | Areal Flood Advisory | RAH | 3 hr |
| Dec 27, 5:41 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 | 23 |
| Tornado Warning | 8 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 24 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| 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 archive20182020
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.