Alert archive / North Carolina / Flash Flood Warnings in 2023

Flash Flood Warning 12, NWS Wilmington, NC

August 31, 20235 counties in North Carolina

NWS Wilmington, NC issued this flash flood warning at Aug 31, 2023, 1:29 AM EDT for 5 counties in North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 31, 2023, 1:29 AM EDT (05:29 UTC)
Expired: Aug 31, 2023, 4:30 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Flood severity: None

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC

The radar

The Wilmington radar (KLTX), 41 km from the middle of the area, began a volume at 05:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Newport, NC (KMHX), launched 00:00Z, 5.5 hours before the alert went out and 135 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 459 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 642 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, NC wrote its last area forecast discussion before this flash flood warning went out at Aug 30, 11:41 PM EDT, 1 hour 48 minutes earlier.

Area forecast discussion, Aug 30, 11:41 PM EDT, 1 hour 48 minutes before

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Hazardous weather outlook, Aug 31, 1:05 AM EDT, 24 minutes before

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In the hours before

Local storm report, Aug 30, 9:03 PM EDT, 4 hours 26 minutes before

Preliminary Local Storm Report
National Weather Service Wilmington NC
903 PM EDT Wed Aug 30 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0812 PM     Coastal Flood    Johnny Mercer Pier      34.21N  77.80W
08/30/2023                   New Hanover        NC   Other Federal

            Peak tide level of 2.6 ft MMHHW (7.08 ft MLLW) was
            observed at the Wrightsville Beach NOS gage.

&&

Event Number ILM2300163

RJB

Local storm report, Aug 30, 9:11 PM EDT, 4 hours 18 minutes before

Preliminary Local Storm Report
National Weather Service Wilmington NC
911 PM EDT Wed Aug 30 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0748 PM     Coastal Flood    Springmaid Pier         33.66N  78.93W
08/30/2023                   Horry              SC   Other Federal

            Peak tide level of 3.53 ft MHHW (9.13 ft MLLW) was
            observed at the Springmaid Pier NOS gage.

&&

Event Number ILM2300164

RJB

Local storm report, Aug 30, 10:50 PM EDT, 2 hours 39 minutes before

Preliminary Local Storm Report
National Weather Service Wilmington NC
1050 PM EDT Wed Aug 30 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1012 PM     Tornado          3 SSE Little River      33.84N  78.61W
08/30/2023                   Horry              SC   Fire Dept/Rescue

            North Myrtle Beach Rescue reported tornado damage in
            the Cherry Grove area. Moderate structural damage around
            57th Ave N and Ocean Blvd, continuing several blocks to
            the northwest. No additional details at this time.

&&

Event Number ILM2300165

OLIVA

Local storm report, Aug 30, 11:08 PM EDT, 2 hours 21 minutes before

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Local storm report, Aug 30, 11:18 PM EDT, 2 hours 11 minutes before

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Local storm report, Aug 30, 11:35 PM EDT, 1 hour 54 minutes before

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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 30, 9:43 PM EDT	Special Marine Warning	ILM		32 min
Aug 30, 10:08 PM EDT	Tornado Warning	ILM	Brunswick	13 min
Aug 30, 10:54 PM EDT	Flash Flood Warning	ILM	Brunswick, Columbus	5 hr
Aug 30, 11:03 PM EDT	Flash Flood Warning	ILM	Robeson	4 hr
Aug 31, 12:00 AM EDT	Areal Flood Advisory	ILM	Bladen, Pender, Robeson	3 hr
Aug 31, 12:53 AM EDT	Areal Flood Advisory	ILM	Brunswick, New Hanover, Pender	2 hr
Aug 31, 12:58 AM EDT	Coastal Flood Advisory	ILM	New Hanover, Pender	11 hr
Aug 31, 1:54 PM EDT	Small Craft Advisory	ILM		5 hr
Aug 31, 2:34 PM EDT	Coastal Flood Advisory	ILM	Brunswick, New Hanover, Pender	11 hr
Aug 31, 4:52 PM EDT	Gale Warning	ILM		2 hr
Aug 31, 7:19 PM EDT	Small Craft Advisory	ILM		20 hr
Aug 30, 9:25 PM EDT	Flash Flood Warning	ILM	Florence, Marion, Williamsburg	4 hr
Aug 30, 10:25 PM EDT	Flash Flood Warning	ILM	Horry	5 hr

Nearby

Flash Flood Warnings in North Carolina, 2023 Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.