Alert archive / North Carolina / Flash Flood Warnings
Flash Flood Warnings in North Carolina, 2019
88 flash flood warnings in 2019. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Flash Flood Warnings
- 88
- Busiest month
- June30 flash flood warnings
- Busiest day
- June 8, 201912 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
51 of 88 flash flood warnings covering North Carolina in 2019 had a flash flood report inside them; 142 of 171 flash flood reports fell inside a warning, on average 93 minutes after it went out.
North Carolina, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| 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: flash flood warnings | 35 | 14 | 60% | 52 | 48% | 70 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 30 | 20 | 33% | 68 | 79% | 100 min |
| NWS Morristown, TN: flash flood warnings | 24 | 12 | 50% | 37 | 51% | 36 min |
| NWS Newport/Morehead City, NC: flash flood warnings | 7 | 3 | 57% | 4 | 100% | 189 min |
| NWS Wilmington, NC: flash flood warnings | 12 | 9 | 25% | 15 | 93% | 93 min |
| NWS Raleigh, NC: flash flood warnings | 29 | 21 | 28% | 79 | 89% | 75 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
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 | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 1:39 AM EST | Flash Flood Warning | RNK | Caswell | 111 min |
| Apr 12, 7:32 PM EDT | Flash Flood Warning | RAH | Durham | 118 min |
| Apr 13, 9:57 AM EDT | Flash Flood Warning | GSP | Cabarrus | 6 hr |
| Apr 13, 10:04 AM EDT | Flash Flood Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 7 hr |
| Apr 13, 12:20 PM EDT | Flash Flood Warning | RAH | Alamance, Durham, Orange | 6 hr |
| Apr 15, 1:24 AM EDT | Flash Flood Warning | RAH | Wake | 80 min |
| Apr 19, 8:58 AM EDT | Flash Flood Warning | GSP | Transylvania | 12 hr |
| Apr 19, 9:17 AM EDT | Flash Flood Warning | GSP | Graham, Macon, Swain | 12 hr |
| Apr 19, 9:31 AM EDT | Flash Flood Warning | MRX | Cherokee, Clay | 3 hr |
| Apr 19, 11:17 AM EDT | Flash Flood Warning | GSP | Henderson | 12 hr |
| Apr 19, 12:12 PM EDT | Flash Flood Warning | GSP | Avery, Buncombe, Burke, McDowell, Mitchell, Yancey | 6 hr |
| Apr 19, 12:50 PM EDT | Flash Flood Warning | GSP | Haywood, Jackson, Macon | 6 hr |
| Apr 19, 1:06 PM EDT | Flash Flood Warning | RNK | Watauga | 6 hr |
| Apr 19, 1:39 PM EDT | Flash Flood Warning | GSP | Madison, Mitchell, Yancey | 6 hr |
| Apr 19, 2:13 PM EDT | Flash Flood Warning | RNK | Alleghany | 6 hr |
| Apr 19, 8:51 PM EDT | Flash Flood Warning | RNK | Ashe, Watauga, Wilkes | 3 hr |
| Jun 1, 10:15 PM EDT | Flash Flood Warning | RNK | Stokes, Surry, Yadkin | 3 hr |
| Jun 7, 8:37 PM EDT | Flash Flood Warning | GSP | Catawba | 3 hr |
| Jun 7, 10:41 PM EDT | Flash Flood Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 4 hr |
| Jun 7, 10:59 PM EDT | Flash Flood Warning | GSP | Alexander, Burke, Caldwell, Catawba, Lincoln | 3 hr |
| Jun 8, 1:08 AM EDT | Flash Flood Warning | RNK | Wilkes | 6 hr |
| Jun 8, 2:46 AM EDT | Flash Flood Warning | RAH | Davidson, Forsyth, Guilford, Randolph | 89 min |
| Jun 8, 5:05 AM EDT | Flash Flood Warning | GSP | Iredell | 63 min |
| Jun 8, 11:16 AM EDT | Flash Flood Warning | RAH | Franklin, Wake | 4 hr |
| Jun 8, 2:13 PM EDT | Flash Flood Warning | RNK | Stokes | 6 hr |
| Jun 8, 5:33 PM EDT | Flash Flood Warning | RAH | Cumberland | 75 min |
| Jun 8, 6:59 PM EDT | Flash Flood Warning | GSP | Avery, Burke, Caldwell, Catawba, McDowell | 3 hr |
| Jun 8, 7:44 PM EDT | Flash Flood Warning | RNK | Watauga | 6 hr |
| Jun 8, 7:57 PM EDT | Flash Flood Warning | GSP | Alexander, Caldwell, Catawba, Lincoln | 2 hr |
| Jun 8, 8:28 PM EDT | Flash Flood Warning | RNK | Wilkes | 6 hr |
| Jun 8, 8:57 PM EDT | Flash Flood Warning | RNK | Alleghany, Ashe, Surry, Wilkes, Yadkin | 6 hr |
| Jun 9, 4:49 AM EDT | Flash Flood Warning | GSP | Catawba | 3 hr |
| Jun 9, 5:39 AM EDT | Flash Flood Warning | GSP | Alexander, Caldwell | 5 hr |
| Jun 9, 5:43 AM EDT | Flash Flood Warning | RAH | Moore | 3 hr |
| Jun 9, 12:39 PM EDT | Flash Flood Warning | GSP | Avery, Burke, Caldwell | 6 hr |
| Jun 9, 3:00 PM EDT | Flash Flood Warning | GSP | Avery | 4 hr |
| Jun 12, 10:03 PM EDT | Flash Flood Warning | RAH | Davidson, Forsyth, Guilford | 3 hr |
| Jun 17, 7:45 PM EDT | Flash Flood Warning | RNK | Watauga | 3 hr |
| Jun 17, 9:06 PM EDT | Flash Flood Warning | RNK | Stokes, Surry, Wilkes | 6 hr |
| Jun 17, 10:03 PM EDT | Flash Flood Warning | RNK | Stokes, Surry | 6 hr |
| Jun 18, 5:27 PM EDT | Flash Flood Warning | RNK | Alleghany, Ashe, Watauga, Wilkes | 4 hr |
| Jun 18, 6:16 PM EDT | Flash Flood Warning | RNK | Alleghany, Surry, Wilkes, Yadkin | 3 hr |
| Jun 18, 7:34 PM EDT | Flash Flood Warning | RNK | Rockingham | 3 hr |
| Jun 18, 7:46 PM EDT | Flash Flood Warning | RNK | Rockingham, Stokes | 2 hr |
| Jun 18, 7:53 PM EDT | Flash Flood Warning | RAH | Forsyth | 2 hr |
| Jun 18, 10:42 PM EDT | Flash Flood Warning | RAH | Durham, Granville, Orange, Person, Vance | 3 hr |
| Jul 3, 1:28 PM EDT | Flash Flood Warning | ILM | Brunswick, New Hanover | 2 hr |
| Jul 4, 5:18 PM EDT | Flash Flood Warning | RAH | Cumberland | 3 hr |
| Jul 7, 4:59 PM EDT | Flash Flood Warning | RAH | Alamance, Guilford | 3 hr |
| Jul 11, 4:31 PM EDT | Flash Flood Warning | GSP | Caldwell | 3 hr |
| Jul 12, 5:31 AM EDT | Flash Flood Warning | RAH | Johnston, Wayne | 3 hr |
| Jul 13, 5:16 PM EDT | Flash Flood Warning | GSP | Mecklenburg, Union | 3 hr |
| Jul 15, 7:00 PM EDT | Flash Flood Warning | RAH | Forsyth | 82 min |
| Jul 19, 11:27 PM EDT | Flash Flood Warning | GSP | Mecklenburg | 3 hr |
| Jul 31, 7:19 PM EDT | Flash Flood Warning | GSP | Henderson, Rutherford | 3 hr |
| Jul 31, 7:22 PM EDT | Flash Flood Warning | RAH | Guilford | 9 hr |
| Aug 1, 10:21 PM EDT | Flash Flood Warning | RAH | Guilford | 114 min |
| Aug 2, 8:03 PM EDT | Flash Flood Warning | RAH | Chatham, Wake | 3 hr |
| Aug 4, 3:31 PM EDT | Flash Flood Warning | GSP | Cabarrus | 119 min |
| Aug 4, 8:07 PM EDT | Flash Flood Warning | RAH | Wilson | 2 hr |
| Aug 5, 4:28 PM EDT | Flash Flood Warning | RAH | Wake | 2 hr |
| Aug 16, 12:39 AM EDT | Flash Flood Warning | RNK | Rockingham | 4 hr |
| Aug 16, 1:00 PM EDT | Flash Flood Warning | RAH | Sampson | 3 hr |
| Aug 17, 2:20 PM EDT | Flash Flood Warning | RAH | Forsyth | 46 min |
| Aug 19, 5:43 PM EDT | Flash Flood Warning | RAH | Guilford | 3 hr |
| Aug 23, 7:38 PM EDT | Flash Flood Warning | RAH | Stanly | 3 hr |
| Sep 5, 10:06 AM EDT | Flash Flood Warning | ILM | Brunswick, Columbus | 114 min |
| Sep 5, 12:04 PM EDT | Flash Flood Warning | ILM | New Hanover, Pender | 3 hr |
| Sep 5, 2:30 PM EDT | Flash Flood Warning | MHX | Duplin, Onslow | 5 hr |
| Sep 5, 2:42 PM EDT | Flash Flood Warning | RAH | Sampson, Wayne | 5 hr |
| Sep 5, 4:10 PM EDT | Flash Flood Warning | RAH | Johnston, Wilson | 5 hr |
| Sep 5, 4:18 PM EDT | Flash Flood Warning | RAH | Cumberland | 5 hr |
| Sep 5, 5:24 PM EDT | Flash Flood Warning | ILM | New Hanover, Pender | 6 hr |
| Sep 5, 5:55 PM EDT | Flash Flood Warning | MHX | Craven, Jones, Lenoir, Pamlico | 3 hr |
| Sep 5, 6:37 PM EDT | Flash Flood Warning | ILM | Brunswick, Columbus, New Hanover, Pender | 6 hr |
| Sep 5, 7:31 PM EDT | Flash Flood Warning | MHX | Duplin, Lenoir | 11 hr |
| Sep 5, 9:30 PM EDT | Flash Flood Warning | RAH | Cumberland, Harnett, Johnston, Sampson, Wayne, Wilson | 12 hr |
| Sep 5, 10:18 PM EDT | Flash Flood Warning | MHX | Duplin, Onslow | 8 hr |
| Sep 5, 11:00 PM EDT | Flash Flood Warning | ILM | New Hanover, Pender | 6 hr |
| Sep 6, 12:19 AM EDT | Flash Flood Warning | ILM | Brunswick, Columbus, New Hanover, Pender | 5 hr |
| Sep 6, 12:31 AM EDT | Flash Flood Warning | MHX | Beaufort, Dare, Hyde, Martin, Tyrrell, Washington | 6 hr |
| Sep 6, 12:48 AM EDT | Flash Flood Warning | AKQ | Bertie, Chowan, Perquimans | 10 hr |
| Sep 6, 3:16 AM EDT | Flash Flood Warning | MHX | Carteret | 4 hr |
| Sep 6, 3:17 AM EDT | Flash Flood Warning | AKQ | Bertie, Camden, Chowan, Gates, Hertford, Pasquotank and 1 more | 13 hr |
| Sep 6, 5:12 AM EDT | Flash Flood Warning | AKQ | Camden, Currituck, Pasquotank | 11 hr |
| Sep 6, 9:04 AM EDT | Flash Flood Warning | MHX | Dare, Hyde | 3 hr |
| Sep 6, 9:29 AM EDT | Flash Flood Warning | AKQ | Currituck | 6 hr |
| Sep 13, 4:49 PM EDT | Flash Flood Warning | GSP | Mecklenburg | 102 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Guilford County8
- Forsyth County7
- Wilkes County7
- Caldwell County6
- New Hanover County6
- Watauga County5
- Stokes County5
- Surry County5
- Catawba County5
- Pender County5
- Davidson County4
- Wake County4
- Avery County4
- Burke County4
- Alleghany County4
- Cumberland County4
- Brunswick County4
- Durham County3
- Randolph County3
- Ashe County3
- Yadkin County3
- Alexander County3
- Rockingham County3
- Johnston County3
- Wayne County3
- Mecklenburg County3
- Wilson County3
- Sampson County3
- Columbus County3
- Duplin County3
- Cabarrus County2
- Alamance County2
- Orange County2
- Macon County2
- Henderson County2
- McDowell County2
- Mitchell County2
- Yancey County2
- Lincoln County2
- Onslow County2
40 more counties
- Lenoir County2
- Dare County2
- Hyde County2
- Bertie County2
- Chowan County2
- Perquimans County2
- Camden County2
- Pasquotank County2
- Currituck County2
- Caswell County1
- Transylvania County1
- Graham County1
- Swain County1
- Cherokee County1
- Clay County1
- Buncombe County1
- Haywood County1
- Jackson County1
- Madison County1
- Iredell County1
- Franklin County1
- Moore County1
- Granville County1
- Person County1
- Vance County1
- Union County1
- Rutherford County1
- Chatham County1
- Stanly County1
- Craven County1
- Jones County1
- Pamlico County1
- Harnett County1
- Beaufort County1
- Martin County1
- Tyrrell County1
- Washington County1
- Carteret County1
- Gates County1
- Hertford County1
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.