Alert archive / South Carolina / Areal Flood Warnings in 2012

Areal Flood Warning 8, NWS Wilmington, NC

May 16, 2012Georgetown County, South Carolina

NWS Wilmington, NC issued this areal flood warning at May 16, 2012, 8:37 PM EDT for Georgetown County, South 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
May 16, 2012, 8:37 PM EDT (00:37 UTC)
Expired
May 16, 2012, 11:30 PM EDT
In force
3 hr
Issued by
NWS Wilmington, NC
Area
Storm-based polygon
Flood severity
None

County Georgetown County, SC

The radar

The Wilmington radar (KLTX), 103 km from the middle of the area, began a volume at 00:38 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

Charleston AFB, SC (KCHS), launched 00:00Z, 0.6 hours before the alert went out and 87 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, Charleston AFB, SC at 00:00Z on 2012-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1393 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2012-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.19395878Sfc1 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
1393 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
1014 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal 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 areal flood warning went out at May 16, 8:01 PM EDT, 36 minutes earlier.

Area forecast discussion, May 16, 8:01 PM EDT, 36 minutes before
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Hazardous weather outlook, May 16, 3:23 PM EDT, 5 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON NC
323 PM EDT WED MAY 16 2012

NCZ087-096-099-105>109-SCZ017-023-024-032-033-039-053>056-171930-
ROBESON-BLADEN-COLUMBUS-INLAND PENDER-COASTAL PENDER-
INLAND NEW HANOVER-COASTAL NEW HANOVER-INLAND BRUNSWICK-MARLBORO-
DARLINGTON-DILLON-FLORENCE-MARION-WILLIAMSBURG-INLAND HORRY-
COASTAL HORRY-INLAND GEORGETOWN-COASTAL GEORGETOWN-
323 PM EDT WED MAY 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST NORTH CAROLINA AND
NORTHEAST SOUTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL BRING PERIODS OF HEAVY RAINFALL
TODAY. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING WIND
DAMAGE...MAINLY THIS AFTERNOON THROUGH EARLY EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDS ARE EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

AMZ250-252-254-256-171930-
SURF CITY TO CAPE FEAR NC OUT 20 NM-
CAPE FEAR NC TO LITTLE RIVER INLET SC OUT 20 NM-
LITTLE RIVER INLET TO MURRELLS INLET SC OUT 20 NM-
MURRELLS INLET TO SOUTH SANTEE RIVER SC OUT 20 NM-
323 PM EDT WED MAY 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ADJACENT COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS WILL BRING PERIODS OF HEAVY RAINFALL
TODAY...WHICH MAY BRING LIMITED VISIBILITIES AND LOCALLY HIGHER
WINDS AND WAVES...AS WELL AS CLOUD TO WATER LIGHTNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDS ARE EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NCZ110-171930-
COASTAL BRUNSWICK-
323 PM EDT WED MAY 16 2012

...MODERATE RISK OF RIP CURRENTS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   MODERATE RISK OF RIP CURRENTS.

MODERATE RISK OF RIP CURRENTS.

SHOWERS AND THUNDERSTORMS WILL BRING PERIODS OF HEAVY RAINFALL
TODAY. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING WIND
DAMAGE...MAINLY THIS AFTERNOON THROUGH EARLY EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDS ARE EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, May 16, 5:22 PM EDT, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON NC
522 PM EDT WED MAY 16 2012

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

0824 PM     HAIL             3 NNE QUINBY            34.28N  79.70W
05/15/2012  E1.00 INCH       FLORENCE           SC   PUBLIC

            QUARTER SIZE HAIL REPORTED ALONG NORTH WILLISTON ROAD.

&&

EVENT NUMBER ILM1200112

SRP
Special weather statement, May 16, 5:38 PM EDT, 2 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON NC
538 PM EDT WED MAY 16 2012

SCZ055-056-162245-
COASTAL GEORGETOWN-INLAND GEORGETOWN-
538 PM EDT WED MAY 16 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS GEORGETOWN COUNTY THROUGH
645 PM EDT...

AT 538 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
NORTH SANTEE...OR ABOUT 8 MILES SOUTHWEST OF GEORGETOWN...MOVING
NORTHEAST AT 15 MPH.

SOME LOCATIONS IMPACTED INCLUDE GEORGETOWN...GRAVES...JACKSON...
LITCHFIELD BEACH...NORTH SANTEE...PLANTERSVILLE AND PAWLEY'S ISLAND.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

HEAVY RAINFALL AND MINOR FLOODING.

THUNDERSTORMS CAN POSE A VARIETY OF THREATS INCLUDING GUSTY WINDS...
SMALL HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALIZED FLOODING. IT
IS RECOMMENDED THAT YOU REMAIN INDOORS UNTIL THE STORMS PASS.

&&

LAT...LON 3323 7946 3323 7949 3329 7955 3359 7923
      3347 7909 3341 7913 3334 7915 3334 7917
      3332 7916 3330 7920 3329 7927 3331 7928
      3328 7928 3326 7925 3317 7939
TIME...MOT...LOC 2138Z 225DEG 11KT 3329 7940

BACON
Local storm report, May 16, 6:13 PM EDT, 2 hours 24 minutes before
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Local storm report, May 16, 6:23 PM EDT, 2 hours 14 minutes before
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Local storm report, May 16, 6:41 PM EDT, 1 hour 56 minutes before
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Local storm report, May 16, 6:44 PM EDT, 1 hour 53 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 8:08 PM EDTAreal Flood AdvisoryILMGeorgetown31 min
May 17, 4:36 AM EDTSpecial Weather StatementILMHorry, Williamsburg54 min
May 17, 6:26 AM EDTSpecial Weather StatementILMFlorence34 min
May 17, 7:04 AM EDTRiver Flood WarningILMFlorence, Marion5 days
May 17, 12:01 PM EDTAreal Flood AdvisoryILMDarlington, Florence56 min
May 17, 12:35 PM EDTAreal Flood WarningILMDarlington, Florence28 min
May 17, 12:55 PM EDTFlash Flood WarningILMDarlington, Florence2 hr
May 17, 1:10 PM EDTAreal Flood AdvisoryILMFlorence, Williamsburg52 min
May 17, 2:00 PM EDTAreal Flood WarningILMDillon, Florence, Marion, Williamsburg2 hr
May 17, 2:56 PM EDTAreal Flood AdvisoryILMFlorence, Horry, Marion113 min
May 17, 3:04 PM EDTAreal Flood AdvisoryILMDillon100 min
May 17, 4:27 PM EDTAreal Flood AdvisoryILMDillon, Horry, Marion2 hr
May 17, 6:15 PM EDTSpecial Weather StatementILMPender60 min
May 17, 6:48 PM EDTAreal Flood AdvisoryILMBladen, Pender53 min

Nearby

Areal Flood Warnings in South Carolina, 2012Every areal flood warning in 2012

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.