Alert archive / North Carolina
Weather alerts in North Carolina, 2023
4,964 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 4,964
- Warnings
- 1,566
- Watches
- 167
- Advisories
- 1,041
- Busiest month
- July1,185 alerts
- Busiest day
- August 15, 2023148 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
7 of 51 tornado warnings covering North Carolina in 2023 had a tornado report inside them; 7 of 15 tornado reports fell inside a warning, on average 9 minutes after it went out.
North Carolina, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 51 | 7 | 86% | 15 | 47% | 9 min |
| Severe thunderstorm warnings | 762 | 573 | 25% | 1,430 | 85% | 22 min |
| Flash flood warnings | 106 | 55 | 48% | 184 | 82% | 102 min |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 14 | 3 | 79% | 11 | 27% | 2 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 392 | 296 | 24% | 895 | 86% | 21 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 20 | 10 | 50% | 28 | 93% | 93 min |
| NWS Wilmington, NC: tornado warnings | 15 | 1 | 93% | 3 | 33% | 4 min |
| NWS Wilmington, NC: severe thunderstorm warnings | 64 | 30 | 53% | 78 | 62% | 22 min |
| NWS Wilmington, NC: flash flood warnings | 15 | 11 | 27% | 28 | 93% | 134 min |
| NWS Morristown, TN: tornado warnings | 29 | 4 | 86% | 10 | 60% | 11 min |
| NWS Morristown, TN: severe thunderstorm warnings | 282 | 246 | 13% | 385 | 89% | 22 min |
| NWS Morristown, TN: flash flood warnings | 45 | 25 | 44% | 48 | 79% | 51 min |
| NWS Newport/Morehead City, NC: tornado warnings | 9 | 0 | 100% | 5 | 0% | |
| NWS Newport/Morehead City, NC: severe thunderstorm warnings | 101 | 64 | 37% | 142 | 87% | 25 min |
| NWS Newport/Morehead City, NC: flash flood warnings | 15 | 11 | 27% | 41 | 95% | 201 min |
| NWS Wakefield, VA: tornado warnings | 15 | 4 | 73% | 6 | 83% | 10 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 244 | 165 | 32% | 383 | 89% | 21 min |
| NWS Wakefield, VA: flash flood warnings | 83 | 58 | 30% | 106 | 95% | 58 min |
| 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 |
| NWS Blacksburg, VA: tornado warnings | 8 | 1 | 88% | 2 | 100% | 6 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 225 | 197 | 12% | 776 | 75% | 22 min |
| NWS Blacksburg, VA: flash flood warnings | 30 | 18 | 40% | 60 | 70% | 88 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
4,964 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- New Hanover County323
- Pender County255
- Dare County233
- Carteret County221
- Onslow County209
- Brunswick County208
- Hyde County207
- Wake County205
- Sampson County176
- Chatham County174
- Mecklenburg County173
- Craven County173
- Cumberland County169
- Harnett County169
- Johnston County168
- Beaufort County160
- Currituck County160
- Franklin County159
- Durham County157
- Cabarrus County154
- Duplin County153
- Caldwell County152
- Moore County150
- Halifax County147
- Jones County147
- Pitt County147
- Lee County145
- Nash County143
- Wayne County142
- Davidson County141
- Granville County141
- Burke County140
- Iredell County140
- Orange County139
- Edgecombe County139
- Guilford County137
- Wilson County137
- Hoke County136
- Randolph County135
- McDowell County133
60 more counties
- Wilkes County131
- Rowan County131
- Pamlico County131
- Rutherford County130
- Warren County130
- Lenoir County129
- Scotland County128
- Cherokee County127
- Forsyth County125
- Montgomery County125
- Robeson County125
- Surry County124
- Union County124
- Catawba County123
- Gaston County123
- Columbus County123
- Vance County122
- Richmond County120
- Greene County120
- Bladen County119
- Martin County119
- Washington County119
- Lincoln County118
- Ashe County118
- Cleveland County117
- Polk County117
- Bertie County116
- Alleghany County113
- Stanly County111
- Alexander County109
- Tyrrell County109
- Pasquotank County109
- Person County107
- Yancey County107
- Chowan County107
- Haywood County106
- Buncombe County104
- Macon County104
- Mitchell County104
- Camden County104
- Henderson County103
- Swain County103
- Davie County102
- Graham County102
- Jackson County102
- Alamance County101
- Hertford County101
- Madison County99
- Avery County99
- Gates County99
- Perquimans County99
- Anson County98
- Northampton County98
- Transylvania County97
- Yadkin County96
- Clay County96
- Watauga County96
- Stokes County89
- Rockingham County86
- Caswell County71
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe 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.