Alert archive / North Carolina
Weather alerts in North Carolina, 2019
5,453 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 5,453
- Warnings
- 1,493
- Watches
- 130
- Advisories
- 1,012
- Busiest month
- August1,051 alerts
- Busiest day
- April 19, 2019221 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
41 of 158 tornado warnings covering North Carolina in 2019 had a tornado report inside them; 55 of 71 tornado reports fell inside a warning, on average 15 minutes after it went out.
North Carolina, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 158 | 41 | 74% | 71 | 77% | 15 min |
| Severe thunderstorm warnings | 710 | 489 | 31% | 1,359 | 79% | 22 min |
| Flash flood warnings | 88 | 51 | 42% | 171 | 83% | 93 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 45 | 1 | 98% | 4 | 50% | 32 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 299 | 219 | 27% | 791 | 68% | 25 min |
| NWS Blacksburg, VA: flash flood warnings | 35 | 14 | 60% | 52 | 48% | 70 min |
| NWS Greenville-Spartanburg, SC: tornado warnings | 23 | 0 | 100% | 4 | 0% | |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 279 | 181 | 35% | 442 | 73% | 17 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 30 | 20 | 33% | 68 | 79% | 100 min |
| NWS Morristown, TN: tornado warnings | 5 | 0 | 100% | 3 | 0% | |
| NWS Morristown, TN: severe thunderstorm warnings | 126 | 101 | 20% | 239 | 74% | 20 min |
| NWS Morristown, TN: flash flood warnings | 24 | 12 | 50% | 37 | 51% | 36 min |
| NWS Newport/Morehead City, NC: tornado warnings | 28 | 10 | 64% | 12 | 100% | 21 min |
| NWS Newport/Morehead City, NC: severe thunderstorm warnings | 94 | 57 | 39% | 144 | 88% | 24 min |
| NWS Newport/Morehead City, NC: flash flood warnings | 7 | 3 | 57% | 4 | 100% | 189 min |
| NWS Wilmington, NC: tornado warnings | 49 | 21 | 57% | 32 | 91% | 15 min |
| NWS Wilmington, NC: severe thunderstorm warnings | 91 | 42 | 54% | 110 | 86% | 20 min |
| NWS Wilmington, NC: flash flood warnings | 12 | 9 | 25% | 15 | 93% | 93 min |
| 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 |
| NWS Wakefield, VA: tornado warnings | 59 | 15 | 75% | 28 | 82% | 13 min |
| NWS Wakefield, VA: severe thunderstorm warnings | 327 | 237 | 28% | 509 | 86% | 20 min |
| NWS Wakefield, VA: flash flood warnings | 18 | 13 | 28% | 33 | 82% | 92 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
5,453 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 County316
- Pender County249
- Brunswick County211
- Currituck County206
- Johnston County205
- Mecklenburg County205
- Wake County202
- Dare County184
- Guilford County174
- Wayne County171
- Hyde County170
- Burke County168
- Wilson County167
- Nash County163
- Alleghany County162
- Chatham County161
- Surry County159
- Henderson County158
- Randolph County155
- Cumberland County155
- Halifax County154
- Ashe County153
- Wilkes County153
- Davidson County153
- Franklin County153
- Pitt County152
- Camden County152
- Onslow County152
- Edgecombe County151
- Harnett County150
- Cabarrus County149
- Bertie County149
- Transylvania County148
- Stokes County147
- Union County147
- Sampson County146
- McDowell County144
- Chowan County143
- Pasquotank County143
- Moore County142
60 more counties
- Watauga County141
- Perquimans County141
- Rutherford County140
- Carteret County140
- Caldwell County139
- Catawba County139
- Durham County139
- Montgomery County139
- Rockingham County137
- Richmond County136
- Caswell County135
- Craven County135
- Forsyth County134
- Hoke County133
- Northampton County133
- Iredell County132
- Beaufort County132
- Gates County131
- Bladen County130
- Lenoir County130
- Gaston County129
- Hertford County129
- Alamance County128
- Lee County128
- Polk County127
- Columbus County127
- Granville County125
- Rowan County125
- Orange County124
- Warren County124
- Cleveland County123
- Martin County123
- Robeson County121
- Stanly County121
- Greene County121
- Jones County120
- Anson County120
- Person County119
- Buncombe County118
- Scotland County117
- Alexander County114
- Vance County112
- Lincoln County112
- Avery County111
- Pamlico County110
- Duplin County107
- Yadkin County106
- Jackson County104
- Washington County104
- Macon County103
- Haywood County98
- Yancey County98
- Swain County96
- Davie County93
- Mitchell County90
- Tyrrell County90
- Madison County86
- Graham County76
- Cherokee County71
- Clay County65
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe 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.