Alert archive / North Carolina / Flash Flood Warnings
Flash Flood Warnings in North Carolina, 2022
86 flash flood warnings in 2022. 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 2022. Tap one for its archive.
- Flash Flood Warnings
- 86
- Busiest month
- July33 flash flood warnings
- Busiest day
- May 26, 20227 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.
36 of 86 flash flood warnings covering North Carolina in 2022 had a flash flood report inside them; 78 of 85 flash flood reports fell inside a warning, on average 79 minutes after it went out.
North Carolina, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 86 | 36 | 58% | 85 | 92% | 79 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: flash flood warnings | 51 | 27 | 47% | 66 | 82% | 91 min |
| NWS Blacksburg, VA: flash flood warnings | 25 | 9 | 64% | 21 | 81% | 74 min |
| NWS Raleigh, NC: flash flood warnings | 41 | 23 | 44% | 55 | 95% | 61 min |
| NWS Newport/Morehead City, NC: flash flood warnings | 9 | 3 | 67% | 5 | 100% | 75 min |
| NWS Wilmington, NC: flash flood warnings | 14 | 8 | 43% | 20 | 90% | 62 min |
| NWS Wakefield, VA: flash flood warnings | 33 | 21 | 36% | 41 | 100% | 37 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 32 | 10 | 69% | 30 | 73% | 126 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 |
|---|---|---|---|---|
| Jan 3, 5:44 AM EST | Flash Flood Warning | RAH | Chatham, Durham, Franklin, Granville, Lee, Orange and 1 more | 4 hr |
| Mar 16, 6:54 PM EDT | Flash Flood Warning | GSP | Gaston | 3 hr |
| Mar 17, 7:27 AM EDT | Flash Flood Warning | RAH | Johnston, Wake | 3 hr |
| Mar 23, 7:05 PM EDT | Flash Flood Warning | GSP | Jackson, Macon, Transylvania | 3 hr |
| Mar 23, 8:10 PM EDT | Flash Flood Warning | GSP | Burke, Caldwell | 5 hr |
| May 7, 4:54 PM EDT | Flash Flood Warning | RAH | Wake | 97 min |
| May 22, 3:04 PM EDT | Flash Flood Warning | RNK | Ashe | 2 hr |
| May 23, 3:55 PM EDT | Flash Flood Warning | RAH | Alamance | 113 min |
| May 23, 4:17 PM EDT | Flash Flood Warning | RAH | Orange | 2 hr |
| May 23, 4:23 PM EDT | Flash Flood Warning | RAH | Chatham, Durham, Harnett, Johnston, Lee, Wake | 114 min |
| May 23, 11:20 PM EDT | Flash Flood Warning | RAH | Durham, Franklin, Granville, Halifax, Johnston, Nash and 4 more | 3 hr |
| May 26, 1:36 PM EDT | Flash Flood Warning | GSP | Jackson, Transylvania | 8 hr |
| May 26, 2:06 PM EDT | Flash Flood Warning | GSP | Haywood | 8 hr |
| May 26, 3:57 PM EDT | Flash Flood Warning | GSP | Transylvania | 6 hr |
| May 26, 4:21 PM EDT | Flash Flood Warning | GSP | Henderson | 4 hr |
| May 26, 5:12 PM EDT | Flash Flood Warning | GSP | Macon | 4 hr |
| May 26, 5:32 PM EDT | Flash Flood Warning | GSP | Henderson | 5 hr |
| May 26, 6:43 PM EDT | Flash Flood Warning | GSP | Jackson | 7 hr |
| May 27, 7:02 AM EDT | Flash Flood Warning | RAH | Anson, Davidson, Forsyth, Guilford, Montgomery, Randolph and 1 more | 3 hr |
| May 27, 9:54 AM EDT | Flash Flood Warning | RAH | Durham, Orange | 2 hr |
| May 27, 5:06 PM EDT | Flash Flood Warning | RAH | Johnston, Wake | 114 min |
| Jun 16, 4:16 PM EDT | Flash Flood Warning | RAH | Forsyth, Guilford | 2 hr |
| Jun 16, 4:33 PM EDT | Flash Flood Warning | RAH | Guilford | 106 min |
| Jun 16, 4:51 PM EDT | Flash Flood Warning | RAH | Stanly | 3 hr |
| Jun 16, 5:20 PM EDT | Flash Flood Warning | RNK | Wilkes, Yadkin | 4 hr |
| Jun 29, 7:08 AM EDT | Flash Flood Warning | MHX | Onslow | 2 hr |
| Jul 2, 8:21 PM EDT | Flash Flood Warning | RAH | Forsyth | 3 hr |
| Jul 4, 11:21 AM EDT | Flash Flood Warning | ILM | Brunswick | 114 min |
| Jul 5, 1:01 AM EDT | Flash Flood Warning | MRX | Cherokee | 3 hr |
| Jul 5, 5:58 PM EDT | Flash Flood Warning | RAH | Forsyth | 4 hr |
| Jul 6, 5:52 PM EDT | Flash Flood Warning | RAH | Guilford, Randolph | 99 min |
| Jul 6, 7:41 PM EDT | Flash Flood Warning | RAH | Franklin, Johnston, Nash, Wake, Wilson | 3 hr |
| Jul 6, 7:53 PM EDT | Flash Flood Warning | MRX | Cherokee | 112 min |
| Jul 6, 9:58 PM EDT | Flash Flood Warning | MHX | Martin | 3 hr |
| Jul 7, 6:38 PM EDT | Flash Flood Warning | RAH | Wake | 48 min |
| Jul 7, 10:44 PM EDT | Flash Flood Warning | RAH | Cumberland, Harnett, Hoke, Johnston, Sampson, Wayne | 2 hr |
| Jul 8, 12:06 AM EDT | Flash Flood Warning | RAH | Cumberland, Sampson | 2 hr |
| Jul 8, 1:03 AM EDT | Flash Flood Warning | MHX | Duplin | 3 hr |
| Jul 8, 2:26 AM EDT | Flash Flood Warning | MHX | Carteret, Onslow | 3 hr |
| Jul 8, 6:24 PM EDT | Flash Flood Warning | RAH | Durham | 102 min |
| Jul 9, 6:38 PM EDT | Flash Flood Warning | RAH | Chatham, Durham, Orange, Wake | 3 hr |
| Jul 9, 7:28 PM EDT | Flash Flood Warning | RAH | Anson, Stanly | 89 min |
| Jul 9, 10:50 PM EDT | Flash Flood Warning | RAH | Cumberland | 85 min |
| Jul 13, 6:28 PM EDT | Flash Flood Warning | GSP | Cabarrus, Gaston, Iredell, Lincoln, Mecklenburg | 3 hr |
| Jul 13, 8:08 PM EDT | Flash Flood Warning | RAH | Durham, Orange | 3 hr |
| Jul 14, 8:58 PM EDT | Flash Flood Warning | MHX | Pitt | 4 hr |
| Jul 15, 6:16 AM EDT | Flash Flood Warning | RAH | Cumberland, Harnett, Johnston, Sampson | 104 min |
| Jul 15, 7:47 AM EDT | Flash Flood Warning | MHX | Beaufort, Pamlico | 2 hr |
| Jul 15, 7:58 AM EDT | Flash Flood Warning | ILM | Brunswick, New Hanover | 115 min |
| Jul 15, 10:37 AM EDT | Flash Flood Warning | MHX | Craven, Pamlico | 85 min |
| Jul 15, 6:06 PM EDT | Flash Flood Warning | RAH | Durham, Wake | 83 min |
| Jul 15, 8:14 PM EDT | Flash Flood Warning | AKQ | Chowan | 3 hr |
| Jul 16, 2:37 PM EDT | Flash Flood Warning | RAH | Guilford | 3 hr |
| Jul 19, 8:53 PM EDT | Flash Flood Warning | GSP | Union | 4 hr |
| Jul 20, 11:54 PM EDT | Flash Flood Warning | MRX | Cherokee, Clay | 5 hr |
| Jul 21, 2:22 AM EDT | Flash Flood Warning | GSP | Swain | 3 hr |
| Jul 26, 4:51 PM EDT | Flash Flood Warning | RNK | Caswell, Rockingham, Stokes | 109 min |
| Jul 27, 8:47 PM EDT | Flash Flood Warning | RAH | Alamance, Chatham, Randolph | 79 min |
| Jul 28, 11:13 PM EDT | Flash Flood Warning | MRX | Cherokee, Clay | 4 hr |
| Aug 7, 4:29 PM EDT | Flash Flood Warning | RAH | Forsyth | 38 min |
| Aug 8, 3:39 PM EDT | Flash Flood Warning | MRX | Cherokee | 87 min |
| Aug 9, 4:46 PM EDT | Flash Flood Warning | RAH | Guilford | 2 hr |
| Aug 11, 7:11 PM EDT | Flash Flood Warning | RAH | Wake | 2 hr |
| Aug 11, 10:11 PM EDT | Flash Flood Warning | RAH | Harnett, Johnston, Sampson, Wayne | 3 hr |
| Aug 11, 11:34 PM EDT | Flash Flood Warning | RAH | Johnston, Wayne | 3 hr |
| Aug 12, 12:10 AM EDT | Flash Flood Warning | RAH | Johnston, Wake | 78 min |
| Aug 21, 3:09 PM EDT | Flash Flood Warning | MHX | Duplin, Onslow | 3 hr |
| Aug 22, 2:05 AM EDT | Flash Flood Warning | RNK | Caswell, Rockingham | 3 hr |
| Aug 22, 9:07 PM EDT | Flash Flood Warning | RAH | Anson, Richmond, Scotland | 113 min |
| Aug 22, 10:18 PM EDT | Flash Flood Warning | RAH | Sampson | 117 min |
| Sep 3, 9:03 AM EDT | Flash Flood Warning | GSP | Macon | 3 hr |
| Sep 4, 10:07 AM EDT | Flash Flood Warning | GSP | Transylvania | 4 hr |
| Sep 4, 11:37 AM EDT | Flash Flood Warning | GSP | Henderson, Transylvania | 4 hr |
| Sep 4, 10:11 PM EDT | Flash Flood Warning | RNK | Stokes | 110 min |
| Sep 5, 11:02 AM EDT | Flash Flood Warning | GSP | Buncombe, McDowell, Rutherford | 4 hr |
| Sep 5, 11:12 AM EDT | Flash Flood Warning | GSP | Henderson, Polk, Transylvania | 4 hr |
| Sep 5, 12:50 PM EDT | Flash Flood Warning | GSP | Burke, Caldwell, McDowell, Rutherford | 3 hr |
| Sep 10, 5:27 PM EDT | Flash Flood Warning | RAH | Cumberland, Harnett, Hoke, Moore | 3 hr |
| Sep 10, 6:46 PM EDT | Flash Flood Warning | RAH | Harnett, Johnston, Wake | 3 hr |
| Sep 30, 11:25 AM EDT | Flash Flood Warning | MHX | Carteret, Craven | 3 hr |
| Sep 30, 2:45 PM EDT | Flash Flood Warning | AKQ | Camden, Chowan, Pasquotank, Perquimans | 3 hr |
| Sep 30, 6:18 PM EDT | Flash Flood Warning | RAH | Chatham, Cumberland, Harnett, Hoke, Johnston, Lee and 5 more | 5 hr |
| Sep 30, 8:32 PM EDT | Flash Flood Warning | RAH | Alamance, Davidson, Durham, Forsyth, Guilford, Montgomery and 3 more | 3 hr |
| Nov 11, 10:37 AM EST | Flash Flood Warning | GSP | Buncombe, Henderson, McDowell, Polk, Rutherford | 6 hr |
| Nov 11, 11:06 AM EST | Flash Flood Warning | GSP | Yancey | 4 hr |
| Nov 11, 11:23 AM EST | Flash Flood Warning | GSP | Avery, Burke, Caldwell, McDowell, Mitchell | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Wake County14
- Johnston County12
- Durham County9
- Orange County7
- Harnett County7
- Guilford County7
- Transylvania County6
- Forsyth County6
- Cumberland County6
- Sampson County6
- Chatham County5
- Henderson County5
- Cherokee County5
- Randolph County4
- Stanly County4
- McDowell County4
- Franklin County3
- Lee County3
- Jackson County3
- Macon County3
- Burke County3
- Caldwell County3
- Alamance County3
- Nash County3
- Anson County3
- Onslow County3
- Hoke County3
- Wayne County3
- Rutherford County3
- Granville County2
- Gaston County2
- Davidson County2
- Montgomery County2
- Brunswick County2
- Duplin County2
- Carteret County2
- Pamlico County2
- Craven County2
- Chowan County2
- Clay County2
32 more counties
- Caswell County2
- Rockingham County2
- Stokes County2
- Scotland County2
- Buncombe County2
- Polk County2
- Moore County2
- Ashe County1
- Halifax County1
- Person County1
- Vance County1
- Haywood County1
- Wilkes County1
- Yadkin County1
- Wilson County1
- Martin County1
- Cabarrus County1
- Iredell County1
- Lincoln County1
- Mecklenburg County1
- Pitt County1
- Beaufort County1
- New Hanover County1
- Union County1
- Swain County1
- Richmond County1
- Camden County1
- Pasquotank County1
- Perquimans County1
- Yancey County1
- Avery County1
- Mitchell County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20212023
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.