Alert archive / North Carolina / Sampson County
Weather alerts in Sampson County, North Carolina, 2017
140 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sampson County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 140
- Warnings
- 30
- Watches
- 12
- Advisories
- 21
- Busiest month
- July26 alerts
- Busiest day
- May 5, 20177 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 4 tornado warnings covering Sampson County in 2017 had a tornado report inside them; 2 of 3 tornado reports fell inside a warning, on average 20 minutes after it went out.
Sampson County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 3 | 67% | 20 min |
| Severe thunderstorm warnings | 23 | 12 | 48% | 32 | 78% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Raleigh, NC: tornado warnings | 18 | 1 | 94% | 4 | 50% | 20 min |
| NWS Raleigh, NC: severe thunderstorm warnings | 211 | 135 | 36% | 418 | 89% | 21 min |
| NWS Raleigh, NC: flash flood warnings | 21 | 12 | 43% | 31 | 87% | 63 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 3, 5:25 AM EST | Special Weather Statement | RAH | 50 min |
| Jan 5, 8:29 AM EST | Winter Storm Watch | RAH | 20 hr |
| Jan 6, 4:38 AM EST | Winter Weather Advisory | RAH | 35 hr |
| Jan 7, 3:17 PM EST | Winter Weather Advisory | RAH | 69 hr |
| Jan 11, 7:32 AM EST | Special Weather Statement | RAH | 73 min |
| Jan 21, 12:17 AM EST | Dense Fog Advisory | RAH | 10 hr |
| Jan 21, 10:06 AM EST | Dense Fog Advisory | RAH | 54 min |
| Feb 9, 4:02 AM EST | Special Weather Statement | RAH | 43 min |
| Feb 15, 9:06 AM EST | Special Weather Statement | RAH | 39 min |
| Mar 1, 6:21 PM EST | Mesoscale Discussion | SPC | 114 min |
| Mar 1, 10:49 PM EST | Special Weather Statement | RAH | 11 min |
| Mar 1, 11:19 PM EST | Special Weather Statement | RAH | 56 min |
| Mar 11, 3:42 PM EST | Winter Weather Advisory | RAH | 20 hr |
| Mar 28, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 31, 9:55 AM EDT | Severe Thunderstorm Warning | RAH | 65 min |
| Mar 31, 9:57 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 3, 6:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 3, 6:45 PM EDT | Special Weather Statement | RAH | 60 min |
| Apr 3, 7:01 PM EDT | Severe Thunderstorm Warning | RAH | 44 min |
| Apr 3, 7:48 PM EDT | Special Weather Statement | RAH | 27 min |
| Apr 5, 2:53 PM EDT | Wind Advisory | RAH | 31 hr |
| Apr 5, 6:03 PM EDT | Special Weather Statement | RAH | 57 min |
| Apr 6, 5:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 6, 7:06 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 6, 7:54 AM EDT | Severe Thunderstorm Warning | RAH | 38 min |
| Apr 6, 8:26 AM EDT | Severe Thunderstorm Warning | RAH | 49 min |
| Apr 6, 3:53 PM EDT | Wind Advisory | RAH | 26 hr |
| Apr 22, 4:11 PM EDT | Flood Watch | RAH | 64 hr |
| Apr 24, 3:33 PM EDT | Areal Flood Advisory | RAH | 4 hr |
| Apr 24, 6:19 PM EDT | Areal Flood Warning | RAH | 17 hr |
| Apr 24, 7:54 PM EDT | Areal Flood Advisory | RAH | 6 hr |
| May 2, 12:11 AM EDT | Special Weather Statement | RAH | 64 min |
| May 4, 8:49 PM EDT | Tornado Watch | SPC | 6 hr |
| May 4, 11:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 5, 1:35 AM EDT | Special Weather Statement | RAH | 40 min |
| May 5, 2:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 5, 3:09 AM EDT | Tornado Watch | SPC | 6 hr |
| May 5, 4:35 AM EDT | Severe Thunderstorm Warning | RAH | 40 min |
| May 5, 5:11 AM EDT | Severe Thunderstorm Warning | RAH | 49 min |
| May 22, 2:38 PM EDT | Special Weather Statement | RAH | 52 min |
| May 23, 3:41 AM EDT | Flood Watch | RAH | 41 hr |
| May 23, 4:56 PM EDT | Tornado Warning | RAH | 34 min |
| May 23, 5:24 PM EDT | Tornado Warning | RAH | 36 min |
| May 24, 3:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 3:46 PM EDT | Tornado Watch | SPC | 6 hr |
| May 24, 4:38 PM EDT | Severe Thunderstorm Warning | RAH | 52 min |
| May 24, 5:05 PM EDT | Tornado Warning | RAH | 40 min |
| May 24, 5:30 PM EDT | Tornado Warning | RAH | 45 min |
| May 25, 12:46 AM EDT | Special Weather Statement | RAH | 29 min |
| May 29, 10:55 PM EDT | Special Weather Statement | RAH | 20 min |
| May 29, 11:36 PM EDT | Severe Thunderstorm Warning | RAH | 24 min |
| May 30, 7:55 PM EDT | Special Weather Statement | RAH | 65 min |
| May 31, 2:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| May 31, 3:28 PM EDT | Special Weather Statement | RAH | 62 min |
| May 31, 3:33 PM EDT | Severe Thunderstorm Warning | RAH | 42 min |
| May 31, 4:12 PM EDT | Severe Thunderstorm Warning | RAH | 28 min |
| Jun 5, 1:58 PM EDT | Special Weather Statement | RAH | 32 min |
| Jun 5, 2:59 PM EDT | Special Weather Statement | RAH | 61 min |
| Jun 5, 9:43 PM EDT | Special Weather Statement | RAH | 62 min |
| Jun 5, 9:53 PM EDT | Severe Thunderstorm Warning | RAH | 22 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 4:41 PM EDT | Severe Thunderstorm Warning | RAH | 64 min |
| Jun 16, 1:27 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 16, 5:59 PM EDT | Special Weather Statement | RAH | 61 min |
| Jun 16, 7:04 PM EDT | Special Weather Statement | RAH | 56 min |
| Jun 19, 1:03 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 1:19 PM EDT | Special Weather Statement | RAH | 41 min |
| Jun 20, 6:14 AM EDT | Special Weather Statement | RAH | 91 min |
| Jun 24, 1:14 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 2:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 5:15 PM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Jun 24, 6:07 PM EDT | Special Weather Statement | RAH | 38 min |
| Jun 30, 1:02 PM EDT | Special Weather Statement | RAH | 73 min |
| Jul 3, 2:04 PM EDT | Special Weather Statement | RAH | 71 min |
| Jul 3, 2:44 PM EDT | Special Weather Statement | RAH | 76 min |
| Jul 6, 9:10 PM EDT | Severe Thunderstorm Warning | RAH | 52 min |
| Jul 7, 12:38 PM EDT | Heat Advisory | RAH | 5 hr |
| Jul 7, 7:43 PM EDT | Special Weather Statement | RAH | 32 min |
| Jul 8, 3:11 PM EDT | Special Weather Statement | RAH | 64 min |
| Jul 8, 8:38 PM EDT | Special Weather Statement | RAH | 82 min |
| Jul 8, 8:43 PM EDT | Severe Thunderstorm Warning | RAH | 62 min |
| Jul 8, 10:00 PM EDT | Special Weather Statement | RAH | 30 min |
| Jul 9, 5:29 PM EDT | Special Weather Statement | RAH | 46 min |
| Jul 9, 6:00 PM EDT | Special Weather Statement | RAH | 45 min |
| Jul 10, 2:40 PM EDT | Special Weather Statement | RAH | 50 min |
| Jul 10, 3:12 PM EDT | Special Weather Statement | RAH | 48 min |
| Jul 10, 4:07 PM EDT | Special Weather Statement | RAH | 38 min |
| Jul 12, 3:42 AM EDT | Heat Advisory | RAH | 15 hr |
| Jul 13, 2:56 AM EDT | Heat Advisory | RAH | 16 hr |
| Jul 14, 3:44 AM EDT | Heat Advisory | RAH | 14 hr |
| Jul 15, 6:13 PM EDT | Special Weather Statement | RAH | 62 min |
| Jul 15, 6:48 PM EDT | Special Weather Statement | RAH | 57 min |
| Jul 16, 2:51 PM EDT | Areal Flood Advisory | RAH | 3 hr |
| Jul 16, 4:20 PM EDT | Special Weather Statement | RAH | 55 min |
| Jul 16, 5:23 PM EDT | Severe Thunderstorm Warning | RAH | 11 min |
| Jul 20, 9:27 PM EDT | Heat Advisory | RAH | 23 hr |
| Jul 21, 3:03 PM EDT | Heat Advisory | RAH | 52 hr |
| Jul 22, 3:39 AM EDT | Excessive Heat Warning | RAH | 39 hr |
| Jul 23, 5:55 PM EDT | Special Weather Statement | RAH | 65 min |
| Aug 12, 12:45 PM EDT | Special Weather Statement | RAH | 90 min |
| Aug 12, 6:27 PM EDT | Special Weather Statement | RAH | 93 min |
| Aug 12, 6:44 PM EDT | Special Weather Statement | RAH | 61 min |
| Aug 12, 6:50 PM EDT | Severe Thunderstorm Warning | RAH | 30 min |
| Aug 14, 4:57 PM EDT | Special Weather Statement | RAH | 63 min |
| Aug 17, 1:06 PM EDT | Heat Advisory | RAH | 6 hr |
| Aug 17, 2:59 PM EDT | Severe Thunderstorm Warning | RAH | 46 min |
| Aug 17, 3:23 PM EDT | Special Weather Statement | RAH | 67 min |
| Aug 17, 4:05 PM EDT | Special Weather Statement | RAH | 40 min |
| Aug 18, 3:49 AM EDT | Heat Advisory | RAH | 14 hr |
| Aug 23, 1:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 6:00 PM EDT | Special Weather Statement | RAH | 60 min |
| Aug 23, 6:08 PM EDT | Severe Thunderstorm Warning | RAH | 68 min |
| Aug 23, 7:53 PM EDT | Severe Thunderstorm Warning | RAH | 52 min |
| Aug 28, 10:33 AM EDT | Flash Flood Watch | RAH | 17 hr |
| Aug 28, 10:34 AM EDT | Wind Advisory | RAH | 16 hr |
| Sep 1, 1:49 PM EDT | Tornado Watch | SPC | 8 hr |
| Sep 1, 2:34 PM EDT | Severe Thunderstorm Warning | RAH | 41 min |
| Sep 1, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 1, 7:15 PM EDT | Severe Thunderstorm Warning | RAH | 45 min |
| Sep 1, 7:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 1, 7:59 PM EDT | Special Weather Statement | RAH | 61 min |
| Sep 1, 8:26 PM EDT | Special Weather Statement | RAH | 64 min |
| Sep 5, 11:35 PM EDT | Special Weather Statement | RAH | 85 min |
| Sep 6, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 6, 2:01 PM EDT | Special Weather Statement | RAH | 29 min |
| Sep 6, 3:26 PM EDT | Special Weather Statement | RAH | 49 min |
| Sep 21, 3:36 PM EDT | Special Weather Statement | RAH | 54 min |
| Sep 21, 4:18 PM EDT | Special Weather Statement | RAH | 57 min |
| Sep 21, 4:25 PM EDT | Severe Thunderstorm Warning | RAH | 51 min |
| Oct 23, 5:40 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 23, 7:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Oct 23, 10:12 PM EDT | Special Weather Statement | RAH | 93 min |
| Oct 23, 10:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 23, 11:36 PM EDT | Special Weather Statement | RAH | 39 min |
| Oct 29, 1:53 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 6, 2:52 AM EST | Dense Fog Advisory | RAH | 6 hr |
| Nov 9, 2:55 PM EST | Freeze Watch | RAH | 12 hr |
| Nov 10, 2:30 AM EST | Freeze Warning | RAH | 31 hr |
| Dec 26, 3:48 PM EST | Winter Weather Advisory | RAH | 18 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 | 4 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 56 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 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 archive20162018
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.