Alert archive / South Carolina / Flash Flood Warnings in 1999

Flash Flood Warning 21, NWS Wilmington, NC

September 15, 1999Columbus County, Robeson County, North Carolina; Dillon County, Horry County, Marion County, South Carolina

NWS Wilmington, NC issued this flash flood warning at Sep 15, 1999, 7:45 PM EDT for Columbus County, Robeson County, North Carolina; Dillon County, Horry County, Marion County, South Carolina. It was in force for 6 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
Sep 15, 1999, 7:45 PM EDT (23:45 UTC)
Expired
Sep 16, 1999, 2:00 AM EDT
In force
6 hr
Issued by
NWS Wilmington, NC
Area
Whole counties

Counties Columbus County, NC, Robeson County, NC, Dillon County, SC, Horry County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 68 km from the middle of the area, began a volume at 23:46 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 12:00Z, 11.8 hours before the alert went out and 211 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-pSkew-T log-p diagram, Newport, NC at 12:00Z on 1999-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 1999-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
392 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
956 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
266 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KILM 152346
FFWILM
NCC017-019-047-129-141-155-SCC033-043-051-067-160600-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE WILMINGTON NC
745 PM EDT WED SEP 15 1999

THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A

* FLOOD WARNING FOR...
  BLADEN COUNTY IN SOUTHEASTERN NORTH CAROLINA
  BRUNSWICK COUNTY IN SOUTHEASTERN NORTH CAROLINA
  COLUMBUS COUNTY IN SOUTHEASTERN NORTH CAROLINA
  DILLON COUNTY IN NORTHEASTERN SOUTH CAROLINA
  GEORGETOWN COUNTY IN NORTHEASTERN SOUTH CAROLINA
  HORRY COUNTY IN NORTHEASTERN SOUTH CAROLINA
  MARION COUNTY IN NORTHEASTERN SOUTH CAROLINA
  NEW HANOVER COUNTY IN SOUTHEASTERN NORTH CAROLINA
  PENDER COUNTY IN SOUTHEASTERN NORTH CAROLINA
  ROBESON COUNTY IN SOUTHEASTERN NORTH CAROLINA

* UNTIL 200 AM EDT

* AT 735 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A BAND OF
HEAVY RAIN MOVING WEST OVER BLADEN...COLUMBUS AND HORRY COUNTIES.
THE HEAVY RAINS ARE EXPECTED TO SPREAD INTO ROBESON...DILLON AND
MARION COUNTIES BY 10 PM AND FLOODING CONDITIONS ARE EXPECTED
TO DEVELOP. ADDITIONAL HEAVY RAINS WILL MOVE ONSHORE OVER THE
COASTAL COUNTIES AHEAD OF HURRICANE FLOYD AND AGGRAVATE EXISTING
FLOODING.

* RADAR ESTIMATES INDICATE THAT 3 TO 6 INCHES OF RAIN HAS ALREADY
FALLEN OVER MUCH OF THE AREA WITH LOCAL AMOUNTS OF 12 TO 15 INCHES
MAINLY ACROSS THE COASTAL COUNTIES. WIDESPREAD FLOODING HAS BEEN
REPORTED ON HIGHWAYS AND SECONDARY ROADS IN MUCH OF THE WARNED AREA
THIS EVENING. FLOODING CONDITIONS ARE EXPECTED TO PERSIST INTO EARLY
THURSDAY MORNING.


DO NOT DRIVE THROUGH FLOODED AREAS. SHALLOW...SWIFTLY FLOWING WATER
CAN WASH A CAR FROM A ROADWAY.  ALSO...THE ROADBED MAY NOT BE
INTACT UNDER THE WATER. IF YOUR VEHICLE STRALLS...ABANDON IT
IMMEDIATELY AND SEEK HIGHER GROUND.

PNEUHERZ

&

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 15, 4:27 AM EDTFlash Flood WarningILMNew Hanover3 hr
Sep 15, 7:25 AM EDTTornado WarningILMPender20 min
Sep 15, 8:23 AM EDTFlash Flood WarningILMBrunswick, New Hanover, Pender6 hr
Sep 15, 10:16 AM EDTTornado WarningILMBrunswick, New Hanover29 min
Sep 15, 2:35 PM EDTFlash Flood WarningILMBrunswick, New Hanover, Pender5 hr
Sep 15, 2:35 PM EDTFlash Flood WarningILMBladen, Columbus5 hr
Sep 15, 2:42 PM EDTTornado WarningILMBrunswick, New Hanover33 min
Sep 15, 3:07 PM EDTTornado WarningILMNew Hanover33 min
Sep 15, 3:23 PM EDTSevere Thunderstorm WarningILMBrunswick, Columbus22 min
Sep 15, 3:23 PM EDTTornado WarningILMBrunswick22 min
Sep 15, 7:45 PM EDTFlash Flood WarningILMBladen, Brunswick, New Hanover, Pender6 hr
Sep 15, 2:35 PM EDTFlash Flood WarningILMGeorgetown, Horry5 hr
Sep 15, 7:45 PM EDTFlash Flood WarningILMGeorgetown6 hr

Nearby

Flash Flood Warnings in South Carolina, 1999Flash Flood Warnings in North Carolina, 1999Every flash flood warning in 1999

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.