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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Flash flood warnings863658%8592%79 min

Each office's whole area, 2022

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Morristown, TN: flash flood warnings512747%6682%91 min
NWS Blacksburg, VA: flash flood warnings25964%2181%74 min
NWS Raleigh, NC: flash flood warnings412344%5595%61 min
NWS Newport/Morehead City, NC: flash flood warnings9367%5100%75 min
NWS Wilmington, NC: flash flood warnings14843%2090%62 min
NWS Wakefield, VA: flash flood warnings332136%41100%37 min
NWS Greenville-Spartanburg, SC: flash flood warnings321069%3073%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.

IssuedProductOfficeCountiesLasted
Jan 3, 5:44 AM ESTFlash Flood Warning Considerable damage threatRAHChatham, Durham, Franklin, Granville, Lee, Orange and 1 more4 hr
Mar 16, 6:54 PM EDTFlash Flood WarningGSPGaston3 hr
Mar 17, 7:27 AM EDTFlash Flood Warning Considerable damage threatRAHJohnston, Wake3 hr
Mar 23, 7:05 PM EDTFlash Flood WarningGSPJackson, Macon, Transylvania3 hr
Mar 23, 8:10 PM EDTFlash Flood WarningGSPBurke, Caldwell5 hr
May 7, 4:54 PM EDTFlash Flood Warning Considerable damage threatRAHWake97 min
May 22, 3:04 PM EDTFlash Flood WarningRNKAshe2 hr
May 23, 3:55 PM EDTFlash Flood Warning Considerable damage threatRAHAlamance113 min
May 23, 4:17 PM EDTFlash Flood Warning Considerable damage threatRAHOrange2 hr
May 23, 4:23 PM EDTFlash Flood Warning Considerable damage threatRAHChatham, Durham, Harnett, Johnston, Lee, Wake114 min
May 23, 11:20 PM EDTFlash Flood WarningRAHDurham, Franklin, Granville, Halifax, Johnston, Nash and 4 more3 hr
May 26, 1:36 PM EDTFlash Flood WarningGSPJackson, Transylvania8 hr
May 26, 2:06 PM EDTFlash Flood WarningGSPHaywood8 hr
May 26, 3:57 PM EDTFlash Flood WarningGSPTransylvania6 hr
May 26, 4:21 PM EDTFlash Flood WarningGSPHenderson4 hr
May 26, 5:12 PM EDTFlash Flood WarningGSPMacon4 hr
May 26, 5:32 PM EDTFlash Flood WarningGSPHenderson5 hr
May 26, 6:43 PM EDTFlash Flood WarningGSPJackson7 hr
May 27, 7:02 AM EDTFlash Flood Warning Considerable damage threatRAHAnson, Davidson, Forsyth, Guilford, Montgomery, Randolph and 1 more3 hr
May 27, 9:54 AM EDTFlash Flood Warning Considerable damage threatRAHDurham, Orange2 hr
May 27, 5:06 PM EDTFlash Flood Warning Considerable damage threatRAHJohnston, Wake114 min
Jun 16, 4:16 PM EDTFlash Flood Warning Considerable damage threatRAHForsyth, Guilford2 hr
Jun 16, 4:33 PM EDTFlash Flood Warning Considerable damage threatRAHGuilford106 min
Jun 16, 4:51 PM EDTFlash Flood Warning Considerable damage threatRAHStanly3 hr
Jun 16, 5:20 PM EDTFlash Flood WarningRNKWilkes, Yadkin4 hr
Jun 29, 7:08 AM EDTFlash Flood WarningMHXOnslow2 hr
Jul 2, 8:21 PM EDTFlash Flood Warning Considerable damage threatRAHForsyth3 hr
Jul 4, 11:21 AM EDTFlash Flood WarningILMBrunswick114 min
Jul 5, 1:01 AM EDTFlash Flood WarningMRXCherokee3 hr
Jul 5, 5:58 PM EDTFlash Flood WarningRAHForsyth4 hr
Jul 6, 5:52 PM EDTFlash Flood Warning Considerable damage threatRAHGuilford, Randolph99 min
Jul 6, 7:41 PM EDTFlash Flood Warning Considerable damage threatRAHFranklin, Johnston, Nash, Wake, Wilson3 hr
Jul 6, 7:53 PM EDTFlash Flood WarningMRXCherokee112 min
Jul 6, 9:58 PM EDTFlash Flood WarningMHXMartin3 hr
Jul 7, 6:38 PM EDTFlash Flood Warning Considerable damage threatRAHWake48 min
Jul 7, 10:44 PM EDTFlash Flood Warning Considerable damage threatRAHCumberland, Harnett, Hoke, Johnston, Sampson, Wayne2 hr
Jul 8, 12:06 AM EDTFlash Flood Warning Considerable damage threatRAHCumberland, Sampson2 hr
Jul 8, 1:03 AM EDTFlash Flood WarningMHXDuplin3 hr
Jul 8, 2:26 AM EDTFlash Flood WarningMHXCarteret, Onslow3 hr
Jul 8, 6:24 PM EDTFlash Flood Warning Considerable damage threatRAHDurham102 min
Jul 9, 6:38 PM EDTFlash Flood Warning Considerable damage threatRAHChatham, Durham, Orange, Wake3 hr
Jul 9, 7:28 PM EDTFlash Flood Warning Considerable damage threatRAHAnson, Stanly89 min
Jul 9, 10:50 PM EDTFlash Flood Warning Considerable damage threatRAHCumberland85 min
Jul 13, 6:28 PM EDTFlash Flood Warning Considerable damage threatGSPCabarrus, Gaston, Iredell, Lincoln, Mecklenburg3 hr
Jul 13, 8:08 PM EDTFlash Flood Warning Considerable damage threatRAHDurham, Orange3 hr
Jul 14, 8:58 PM EDTFlash Flood Warning Considerable damage threatMHXPitt4 hr
Jul 15, 6:16 AM EDTFlash Flood Warning Considerable damage threatRAHCumberland, Harnett, Johnston, Sampson104 min
Jul 15, 7:47 AM EDTFlash Flood WarningMHXBeaufort, Pamlico2 hr
Jul 15, 7:58 AM EDTFlash Flood WarningILMBrunswick, New Hanover115 min
Jul 15, 10:37 AM EDTFlash Flood WarningMHXCraven, Pamlico85 min
Jul 15, 6:06 PM EDTFlash Flood Warning Considerable damage threatRAHDurham, Wake83 min
Jul 15, 8:14 PM EDTFlash Flood WarningAKQChowan3 hr
Jul 16, 2:37 PM EDTFlash Flood Warning Considerable damage threatRAHGuilford3 hr
Jul 19, 8:53 PM EDTFlash Flood WarningGSPUnion4 hr
Jul 20, 11:54 PM EDTFlash Flood WarningMRXCherokee, Clay5 hr
Jul 21, 2:22 AM EDTFlash Flood WarningGSPSwain3 hr
Jul 26, 4:51 PM EDTFlash Flood WarningRNKCaswell, Rockingham, Stokes109 min
Jul 27, 8:47 PM EDTFlash Flood Warning Considerable damage threatRAHAlamance, Chatham, Randolph79 min
Jul 28, 11:13 PM EDTFlash Flood WarningMRXCherokee, Clay4 hr
Aug 7, 4:29 PM EDTFlash Flood Warning Considerable damage threatRAHForsyth38 min
Aug 8, 3:39 PM EDTFlash Flood WarningMRXCherokee87 min
Aug 9, 4:46 PM EDTFlash Flood Warning Considerable damage threatRAHGuilford2 hr
Aug 11, 7:11 PM EDTFlash Flood Warning Considerable damage threatRAHWake2 hr
Aug 11, 10:11 PM EDTFlash Flood Warning Considerable damage threatRAHHarnett, Johnston, Sampson, Wayne3 hr
Aug 11, 11:34 PM EDTFlash Flood Warning Considerable damage threatRAHJohnston, Wayne3 hr
Aug 12, 12:10 AM EDTFlash Flood Warning Considerable damage threatRAHJohnston, Wake78 min
Aug 21, 3:09 PM EDTFlash Flood WarningMHXDuplin, Onslow3 hr
Aug 22, 2:05 AM EDTFlash Flood WarningRNKCaswell, Rockingham3 hr
Aug 22, 9:07 PM EDTFlash Flood Warning Considerable damage threatRAHAnson, Richmond, Scotland113 min
Aug 22, 10:18 PM EDTFlash Flood Warning Considerable damage threatRAHSampson117 min
Sep 3, 9:03 AM EDTFlash Flood WarningGSPMacon3 hr
Sep 4, 10:07 AM EDTFlash Flood WarningGSPTransylvania4 hr
Sep 4, 11:37 AM EDTFlash Flood Warning Considerable damage threatGSPHenderson, Transylvania4 hr
Sep 4, 10:11 PM EDTFlash Flood WarningRNKStokes110 min
Sep 5, 11:02 AM EDTFlash Flood WarningGSPBuncombe, McDowell, Rutherford4 hr
Sep 5, 11:12 AM EDTFlash Flood WarningGSPHenderson, Polk, Transylvania4 hr
Sep 5, 12:50 PM EDTFlash Flood WarningGSPBurke, Caldwell, McDowell, Rutherford3 hr
Sep 10, 5:27 PM EDTFlash Flood Warning Considerable damage threatRAHCumberland, Harnett, Hoke, Moore3 hr
Sep 10, 6:46 PM EDTFlash Flood Warning Considerable damage threatRAHHarnett, Johnston, Wake3 hr
Sep 30, 11:25 AM EDTFlash Flood WarningMHXCarteret, Craven3 hr
Sep 30, 2:45 PM EDTFlash Flood WarningAKQCamden, Chowan, Pasquotank, Perquimans3 hr
Sep 30, 6:18 PM EDTFlash Flood Warning Considerable damage threatRAHChatham, Cumberland, Harnett, Hoke, Johnston, Lee and 5 more5 hr
Sep 30, 8:32 PM EDTFlash Flood Warning Considerable damage threatRAHAlamance, Davidson, Durham, Forsyth, Guilford, Montgomery and 3 more3 hr
Nov 11, 10:37 AM ESTFlash Flood Warning Considerable damage threatGSPBuncombe, Henderson, McDowell, Polk, Rutherford6 hr
Nov 11, 11:06 AM ESTFlash Flood WarningGSPYancey4 hr
Nov 11, 11:23 AM ESTFlash Flood WarningGSPAvery, Burke, Caldwell, McDowell, Mitchell6 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

32 more counties

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.