Alert archive / North Carolina / Onslow County
Weather alerts in Onslow County, North Carolina, 2020
206 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Onslow County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 206
- Warnings
- 29
- Watches
- 16
- Advisories
- 62
- Busiest month
- April34 alerts
- Busiest day
- April 13, 20208 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 3 tornado warnings covering Onslow County in 2020 had a tornado report inside them; 7 of 8 tornado reports fell inside a warning, on average 10 minutes after it went out.
Onslow County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 2 | 33% | 8 | 88% | 10 min |
| Severe thunderstorm warnings | 11 | 10 | 9% | 6 | 100% | 18 min |
| Flash flood warnings | 6 | 5 | 17% | 7 | 86% | 87 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Newport/Morehead City, NC: tornado warnings | 27 | 11 | 59% | 20 | 90% | 11 min |
| NWS Newport/Morehead City, NC: severe thunderstorm warnings | 40 | 25 | 38% | 90 | 82% | 24 min |
| NWS Newport/Morehead City, NC: flash flood warnings | 13 | 9 | 31% | 16 | 88% | 103 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 12, 1:49 AM EST | Mesoscale Discussion | SPC | 86 min |
| Jan 13, 12:46 PM EST | Mesoscale Discussion | SPC | 119 min |
| Jan 14, 4:43 AM EST | Dense Fog Advisory | MHX | 5 hr |
| Jan 25, 3:21 AM EST | Mesoscale Discussion | SPC | 114 min |
| Feb 5, 3:18 PM EST | Wind Advisory | MHX | 50 hr |
| Feb 5, 3:50 PM EST | High Surf Advisory | MHX | 57 hr |
| Feb 6, 4:00 PM EST | Mesoscale Discussion | SPC | 60 min |
| Feb 6, 4:23 PM EST | Tornado Watch | SPC | 9 hr |
| Feb 6, 8:05 PM EST | Special Weather Statement | MHX | 55 min |
| Feb 6, 8:09 PM EST | Mesoscale Discussion | SPC | 96 min |
| Feb 7, 12:01 AM EST | Areal Flood Advisory | MHX | 119 min |
| Feb 7, 2:08 AM EST | Areal Flood Advisory | MHX | 82 min |
| Feb 7, 8:59 PM EST | River Flood Warning | MHX | 30 hr |
| Feb 13, 3:19 PM EST | Special Weather Statement | MHX | 41 min |
| Feb 19, 3:02 PM EST | Winter Weather Advisory | MHX | 43 hr |
| Feb 26, 8:52 AM EST | Dense Fog Advisory | MHX | 2 hr |
| Mar 3, 6:21 PM EST | Special Weather Statement | MHX | 24 min |
| Mar 3, 7:07 PM EST | Special Weather Statement | MHX | 38 min |
| Apr 7, 3:10 PM EDT | Coastal Flood Advisory | MHX | 9 hr |
| Apr 8, 2:50 PM EDT | Coastal Flood Advisory | MHX | 9 hr |
| Apr 8, 9:45 PM EDT | Special Weather Statement | MHX | 45 min |
| Apr 9, 8:27 AM EDT | Special Weather Statement | MHX | 63 min |
| Apr 9, 2:55 PM EDT | Coastal Flood Advisory | MHX | 9 hr |
| Apr 10, 10:40 AM EDT | Red Flag Warning | MHX | 7 hr |
| Apr 10, 2:37 PM EDT | Frost Advisory | MHX | 17 hr |
| Apr 12, 4:08 AM EDT | Wind Advisory | MHX | 35 hr |
| Apr 12, 2:52 PM EDT | High Surf Advisory | MHX | 37 hr |
| Apr 13, 4:40 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 13, 5:01 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 13, 6:46 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 13, 8:29 AM EDT | Severe Thunderstorm Warning | MHX | 61 min |
| Apr 13, 9:28 AM EDT | Severe Thunderstorm Warning | MHX | 62 min |
| Apr 13, 9:30 AM EDT | Tornado Warning | MHX | 45 min |
| Apr 13, 10:06 AM EDT | Tornado Warning | MHX | 39 min |
| Apr 13, 10:12 AM EDT | Severe Thunderstorm Warning | MHX | 48 min |
| Apr 15, 3:20 AM EDT | Frost Advisory | MHX | 29 hr |
| Apr 16, 3:27 PM EDT | Frost Advisory | MHX | 17 hr |
| Apr 18, 11:48 AM EDT | Severe Thunderstorm Warning | MHX | 42 min |
| Apr 19, 8:24 PM EDT | Beach Hazards Statement | MHX | 48 hr |
| Apr 22, 3:34 PM EDT | Wind Advisory | MHX | 35 hr |
| Apr 22, 8:04 PM EDT | Beach Hazards Statement | MHX | 48 hr |
| Apr 23, 3:27 AM EDT | High Surf Advisory | MHX | 24 hr |
| Apr 25, 7:48 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Apr 26, 1:25 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 26, 2:10 AM EDT | Special Weather Statement | MHX | 35 min |
| Apr 26, 2:40 AM EDT | Special Weather Statement | MHX | 35 min |
| Apr 26, 2:49 AM EDT | Special Weather Statement | MHX | 26 min |
| Apr 29, 2:53 PM EDT | Coastal Flood Advisory | MHX | 29 hr |
| Apr 29, 2:53 PM EDT | High Surf Advisory | MHX | 37 hr |
| Apr 29, 8:05 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Apr 30, 8:16 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 30, 1:11 PM EDT | Severe Thunderstorm Warning | MHX | 64 min |
| Apr 30, 8:15 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 2, 8:18 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 6, 4:42 AM EDT | Special Weather Statement | MHX | 63 min |
| May 6, 7:55 PM EDT | Special Weather Statement | MHX | 65 min |
| May 7, 7:45 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 9, 3:41 AM EDT | Frost Advisory | MHX | 28 hr |
| May 16, 5:04 PM EDT | Tropical Storm Watch | MHX | 14 hr |
| May 16, 8:05 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 17, 5:07 AM EDT | Tropical Storm Warning | MHX | 36 hr |
| May 17, 2:57 PM EDT | Coastal Flood Advisory | MHX | 5 days |
| May 17, 7:49 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 18, 7:30 PM EDT | Beach Hazards Statement | MHX | 25 hr |
| May 20, 3:20 PM EDT | Flash Flood Watch | MHX | 39 hr |
| May 20, 8:50 PM EDT | Beach Hazards Statement | MHX | 23 hr |
| May 21, 8:58 AM EDT | Areal Flood Advisory | MHX | 92 min |
| May 21, 10:39 AM EDT | Special Weather Statement | MHX | 36 min |
| May 21, 12:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 12:55 PM EDT | Flash Flood Warning | MHX | 3 hr |
| May 21, 2:32 PM EDT | Tornado Warning | MHX | 13 min |
| May 21, 3:24 PM EDT | Areal Flood Advisory | MHX | 2 hr |
| May 22, 4:14 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 22, 6:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 22, 7:05 PM EDT | Severe Thunderstorm Warning | MHX | 55 min |
| May 22, 7:59 PM EDT | Severe Thunderstorm Warning | MHX | 30 min |
| May 27, 7:38 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| May 29, 2:15 PM EDT | Areal Flood Advisory | MHX | 90 min |
| May 29, 4:09 PM EDT | Flash Flood Warning | MHX | 3 hr |
| May 30, 3:33 AM EDT | River Flood Warning | MHX | 45 hr |
| Jun 2, 8:16 PM EDT | Beach Hazards Statement | MHX | 48 hr |
| Jun 5, 4:31 AM EDT | Beach Hazards Statement | MHX | 15 hr |
| Jun 5, 8:08 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Jun 11, 5:03 AM EDT | Beach Hazards Statement | MHX | 15 hr |
| Jun 16, 7:17 AM EDT | Flash Flood Watch | MHX | 20 hr |
| Jun 16, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 5:48 PM EDT | Areal Flood Advisory | MHX | 87 min |
| Jun 16, 7:47 PM EDT | Flash Flood Warning | MHX | 100 min |
| Jun 20, 7:55 PM EDT | Special Weather Statement | MHX | 35 min |
| Jun 22, 2:11 PM EDT | Special Weather Statement | MHX | 34 min |
| Jun 22, 3:49 PM EDT | Special Weather Statement | MHX | 26 min |
| Jun 22, 8:06 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Jun 30, 1:28 PM EDT | Special Weather Statement | MHX | 32 min |
| Jun 30, 2:20 PM EDT | Special Weather Statement | MHX | 25 min |
| Jun 30, 2:42 PM EDT | Special Weather Statement | MHX | 33 min |
| Jun 30, 3:17 PM EDT | Special Weather Statement | MHX | 28 min |
| Jul 1, 1:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 5, 2:49 PM EDT | Special Weather Statement | MHX | 41 min |
| Jul 5, 3:44 PM EDT | Special Weather Statement | MHX | 61 min |
| Jul 6, 4:12 PM EDT | Special Weather Statement | MHX | 48 min |
| Jul 11, 6:30 PM EDT | Special Weather Statement | MHX | 30 min |
| Jul 12, 8:13 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Jul 13, 1:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 13, 3:40 PM EDT | Special Weather Statement | MHX | 35 min |
| Jul 13, 3:59 PM EDT | Flash Flood Warning | MHX | 3 hr |
| Jul 13, 4:22 PM EDT | Special Weather Statement | MHX | 23 min |
| Jul 13, 8:34 PM EDT | Beach Hazards Statement | MHX | 23 hr |
| Jul 18, 8:35 PM EDT | Heat Advisory | MHX | 23 hr |
| Jul 19, 2:45 PM EDT | Heat Advisory | MHX | 29 hr |
| Jul 20, 8:03 PM EDT | Heat Advisory | MHX | 24 hr |
| Jul 21, 8:01 PM EDT | Heat Advisory | MHX | 24 hr |
| Jul 23, 3:05 AM EDT | Heat Advisory | MHX | 16 hr |
| Jul 27, 2:43 AM EDT | Heat Advisory | MHX | 17 hr |
| Jul 27, 9:41 PM EDT | Heat Advisory | MHX | 22 hr |
| Jul 28, 2:43 PM EDT | Special Weather Statement | MHX | 47 min |
| Jul 28, 3:19 PM EDT | Special Weather Statement | MHX | 56 min |
| Jul 29, 1:51 PM EDT | Special Weather Statement | MHX | 39 min |
| Jul 30, 8:16 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Jul 31, 3:22 AM EDT | Heat Advisory | MHX | 16 hr |
| Jul 31, 8:09 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Aug 1, 3:11 AM EDT | Heat Advisory | MHX | 15 hr |
| Aug 1, 1:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 8:05 PM EDT | Beach Hazards Statement | MHX | 48 hr |
| Aug 2, 3:06 AM EDT | Flash Flood Watch | MHX | 52 hr |
| Aug 2, 11:00 AM EDT | Tropical Storm Watch | MHX | 12 hr |
| Aug 2, 5:00 PM EDT | Storm Surge Watch | MHX | 38 hr |
| Aug 2, 5:00 PM EDT | Tropical Storm Warning | MHX | 42 hr |
| Aug 3, 4:24 AM EDT | High Surf Advisory | MHX | 34 hr |
| Aug 3, 3:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 8:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 3, 8:16 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Aug 3, 8:49 PM EDT | Tornado Watch | SPC | 9 hr |
| Aug 4, 12:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 6, 1:57 PM EDT | Special Weather Statement | MHX | 33 min |
| Aug 6, 2:32 PM EDT | Flash Flood Warning | MHX | 2 hr |
| Aug 7, 9:40 PM EDT | Special Weather Statement | MHX | 50 min |
| Aug 9, 1:37 PM EDT | Special Weather Statement | MHX | 23 min |
| Aug 10, 6:16 PM EDT | Areal Flood Advisory | MHX | 119 min |
| Aug 19, 4:53 PM EDT | Areal Flood Advisory | MHX | 52 min |
| Aug 28, 8:11 PM EDT | Beach Hazards Statement | MHX | 24 hr |
| Aug 29, 12:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 2, 3:01 AM EDT | Heat Advisory | MHX | 16 hr |
| Sep 2, 7:05 PM EDT | Heat Advisory | MHX | 24 hr |
| Sep 3, 3:24 AM EDT | Excessive Heat Warning | MHX | 16 hr |
| Sep 11, 11:14 AM EDT | Areal Flood Advisory | MHX | 39 min |
| Sep 12, 8:09 PM EDT | Beach Hazards Statement | MHX | 8 hr |
| Sep 13, 4:16 AM EDT | Beach Hazards Statement | MHX | 64 hr |
| Sep 15, 10:49 AM EDT | Coastal Flood Advisory | MHX | 10 hr |
| Sep 15, 8:14 PM EDT | Beach Hazards Statement | MHX | 9 days |
| Sep 16, 4:06 AM EDT | Flash Flood Watch | MHX | 49 hr |
| Sep 16, 4:05 PM EDT | Coastal Flood Advisory | MHX | 5 hr |
| Sep 17, 3:03 PM EDT | High Surf Advisory | MHX | 6 days |
| Sep 17, 3:06 PM EDT | Tornado Watch | SPC | 8 hr |
| Sep 17, 6:00 PM EDT | Special Weather Statement | MHX | 60 min |
| Sep 17, 6:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 7:45 PM EDT | Areal Flood Advisory | MHX | 3 hr |
| Sep 18, 4:58 AM EDT | Coastal Flood Advisory | MHX | 7 days |
| Sep 25, 7:56 PM EDT | Special Weather Statement | MHX | 64 min |
| Sep 27, 3:20 AM EDT | Dense Fog Advisory | MHX | 6 hr |
| Sep 29, 12:39 PM EDT | Special Weather Statement | MHX | 36 min |
| Sep 29, 2:36 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 29, 9:43 PM EDT | Severe Thunderstorm Warning | MHX | 47 min |
| Sep 29, 9:51 PM EDT | Severe Thunderstorm Warning | MHX | 39 min |
| Sep 29, 10:41 PM EDT | Severe Thunderstorm Warning | MHX | 34 min |
| Oct 11, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 11, 10:10 PM EDT | Special Weather Statement | MHX | 50 min |
| Oct 16, 3:48 AM EDT | Coastal Flood Advisory | MHX | 3 days |
| Oct 21, 8:11 PM EDT | Beach Hazards Statement | MHX | 49 hr |
| Oct 24, 4:34 AM EDT | Beach Hazards Statement | MHX | 16 hr |
| Oct 27, 5:08 AM EDT | Dense Fog Advisory | MHX | 5 hr |
| Oct 28, 3:40 PM EDT | Wind Advisory | MHX | 38 hr |
| Oct 28, 8:40 PM EDT | Beach Hazards Statement | MHX | 23 hr |
| Oct 29, 8:37 PM EDT | Beach Hazards Statement | MHX | 23 hr |
| Nov 1, 11:36 AM EST | Mesoscale Discussion | SPC | 114 min |
| Nov 1, 12:52 PM EST | Special Weather Statement | MHX | 38 min |
| Nov 2, 2:03 PM EST | Frost Advisory | MHX | 18 hr |
| Nov 6, 1:26 AM EST | Dense Fog Advisory | MHX | 8 hr |
| Nov 11, 3:40 AM EST | Flash Flood Watch | MHX | 40 hr |
| Nov 12, 11:36 AM EST | Mesoscale Discussion | SPC | 114 min |
| Nov 12, 12:45 PM EST | Flash Flood Warning | MHX | 3 hr |
| Nov 12, 1:41 PM EST | Areal Flood Advisory | MHX | 109 min |
| Nov 12, 4:17 PM EST | Areal Flood Warning | MHX | 3 hr |
| Nov 13, 11:51 AM EST | River Flood Warning | MHX | 33 hr |
| Nov 14, 12:37 AM EST | Dense Fog Advisory | MHX | 4 hr |
| Nov 17, 3:10 AM EST | Freeze Watch | MHX | 24 hr |
| Nov 18, 3:00 AM EST | Freeze Warning | MHX | 29 hr |
| Nov 28, 3:50 AM EST | Dense Fog Advisory | MHX | 5 hr |
| Nov 29, 3:14 AM EST | High Surf Advisory | MHX | 56 hr |
| Nov 29, 3:20 AM EST | Wind Advisory | MHX | 40 hr |
| Nov 30, 2:08 AM EST | Special Weather Statement | MHX | 37 min |
| Nov 30, 12:26 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 5, 12:58 AM EST | Special Weather Statement | MHX | 92 min |
| Dec 13, 7:47 PM EST | Dense Fog Advisory | MHX | 10 hr |
| Dec 14, 11:32 AM EST | Special Weather Statement | MHX | 43 min |
| Dec 14, 3:01 PM EST | Coastal Flood Advisory | MHX | 19 hr |
| Dec 15, 3:28 PM EST | Coastal Flood Advisory | MHX | 45 hr |
| Dec 16, 12:39 PM EST | Special Weather Statement | MHX | 36 min |
| Dec 16, 1:15 PM EST | Special Weather Statement | MHX | 30 min |
| Dec 23, 3:26 AM EST | Wind Advisory | MHX | 48 hr |
| Dec 23, 3:07 PM EST | Coastal Flood Advisory | MHX | 51 hr |
| Dec 23, 3:07 PM EST | High Surf Advisory | MHX | 51 hr |
| Dec 24, 2:19 PM EST | Tornado Watch | SPC | 9 hr |
| Dec 24, 7:13 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 24, 9:38 PM EST | Tornado Watch | SPC | 3 hr |
| Dec 24, 10:39 PM EST | Severe Thunderstorm Warning | MHX | 66 min |
| Dec 31, 3:26 PM EST | Mesoscale Discussion | SPC | 2 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 | 11 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 41 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 6 |
| River Flood Warning | 3 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 11 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 11 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Storm Surge Watch | 1 |
| Tropical Storm Watch | 2 |
| Coast and beach | |
| Coastal Flood Advisory | 12 |
| High Surf Advisory | 8 |
| Beach Hazards Statement | 31 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.