Alert archive / South Carolina / Flash Flood Warnings in 2003

Flash Flood Warning 9, NWS Greenville-Spartanburg, SC

March 20, 2003Oconee County, Pickens County, South Carolina; Franklin County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this flash flood warning at Mar 20, 2003, 1:55 AM EST for Oconee County, Pickens County, South Carolina; Franklin County, Stephens County, Georgia. 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
Mar 20, 2003, 1:55 AM EST (06:55 UTC)
Expired
Mar 20, 2003, 5:00 AM EST
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

Counties Franklin County, GA, Stephens County, GA, Oconee County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 83 km from the middle of the area, began a volume at 06:56 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.9 hours before the alert went out and 193 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, Peachtre/Fal Fld, GA at 00:00Z on 2003-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 753 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, Peachtre/Fal Fld, GA at 00:00Z on 2003-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 square meters per square second.1939587897117Sfc1 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
753 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
467 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.6
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KGSP 200655
FFWGSP
GAC119-257-SCC073-077-201000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
155 AM EST THU MAR 20 2003

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  STEPHENS COUNTY IN NORTHEAST GEORGIA
  FRANKLIN COUNTY IN NORTHEAST GEORGIA
  PICKENS COUNTY IN UPSTATE SOUTH CAROLINA
  SOUTHERN OCONEE COUNTY IN UPSTATE SOUTH CAROLINA

* UNTIL 500 AM EST

* AT 146 AM EST...WEATHER SERVICE DOPPLER RADAR INDICATED HOURLY 
  RAINFALL RATES OF AROUND ONE INCH WERE OCCURRING ACROSS THE AREA. 
  MODERATE TO HEAVY RAINFALL IS EXPECTED TO CONTINUE FOR THE NEXT 
  SEVERAL HOURS.   

* FLOODING HAS ALREADY BEEN REPORTED IN SOME LOW LYING AND POOR 
  DRAINAGE AREAS. CONTINUED HEAVY RAINFALL WILL LIKELY RESULT IN 
  SOME CREEKS AND STREAMS COMING OUT OF THEIR BANKS...AS WELL AS 
  URBAN AND ROAD FLOODING IN AREAS FROM CARNESVILLE...TO SENECA...
  TO EASLEY...INCLUDING THE PICKENS AND CLEMSON AREAS.  
    
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND. EVEN MODERN SPORT UTILITY VEHICLES CANNOT BE
SAFELY DRIVEN THROUGH FLOOD WATERS.

$$

LANE
2 follow-up statements
000 
WGUS72 KGSP 200900
FFSGSP
GAC119-257-SCC073-077-200945-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
400 AM EST THU MAR 20 2003

...A FLASH FLOOD WARNING CONTINUES UNTIL 500 AM EST FOR STEPHENS...
FRANKLIN...PICKENS AND SOUTHERN OCONEE COUNTIES...

ALTHOUGH HEAVIER RAINS HAVE MOVED EAST OUT OF THE WARNED AREA... 
LIGHT TO MODERATE RAIN WILL CONTINUE FOR THE NEXT HOUR OR TWO FROM 
CARNESVILLE...TO SENECA AND OAKWAY...TO PICKENS AND EASLEY. SOME 
SMALL STREAMS HAVE BEEN REPORTED TO BE OUT OF THEIR BANKS ACROSS 
PORTIONS OF PICKENS COUNTY. OTHERWISE...FLOODING HAS BEEN RELATIVELY 
MINOR ACROSS THIS MORNING. HOWEVER...THE GROUND IS SATURATED AND 
MANY RIVERS AND STREAMS ARE NEAR BANKFULL ACROSS ALL OF THE WARNED  
AREA. EVEN MODERATE RAINFALL COULD CAUSE ADDITIONAL FLOODING.  

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. USE CAUTION IN OR NEAR ANY SMALL
CREEK TONIGHT...AND AVOID ROUTES THAT YOU KNOW ARE FLOOD PRONE.

DO NOT BECOME A FATALITY DO NOT CROSS FLOODED ROADS...THE ROAD COULD
BE WASHED OUT FROM THE FLOW OF THE WATER...AND YOUR CAR COULD BE
SWEPT AWAY BY THE SWIFTLY MOVING WATER.

$$

LANE
000 
WGUS72 KGSP 201017
FFSGSP
GAC119-257-SCC073-077-201115-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
515 AM EST THU MAR 20 2003

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR STEPHENS... 
FRANKLIN...PICKENS AND OCONEE COUNTIES EXPIRED AT 500 AM EST...

RAIN CONTINUED OVER THE AREA AT 515 AM... BUT EXCESSIVE RAINFALL HAS 
MOVED TO THE EAST.  STREAMS AND CREEKS WILL SOON BEGIN TO 
RECEDE...ENDING THE FLASH FLOOD THREAT. EVEN THOUGH WATER LEVELS 
WILL BE LOWERING... SOME ROADWAYS STILL MAY BE COVERED WITH WATER. 
MOTORISTS ARE ADVISED TO AVOID DRIVING THROUGH FLOODED ROADWAYS.

FLOODED ROADS AND ROADWAYS DAMAGED BY WATER WILL BE DIFFICULT TO SEE 
UNTIL SUNRISE.  BE CAREFUL WHILE TRAVELING DURING THE PRE-DAWN HOURS.

$$
LGL

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 19, 8:32 PM ESTFlash Flood WarningGSPAnderson, Pickens3 hr
Mar 19, 9:34 PM ESTFlash Flood WarningGSPGreenville, Spartanburg4 hr
Mar 19, 9:40 PM ESTSevere Thunderstorm WarningGSPAnderson65 min
Mar 20, 1:30 AM ESTFlash Flood WarningGSPGreenville, Spartanburg4 hr
Mar 20, 1:59 AM ESTSevere Thunderstorm WarningGSPOconee, Pickens46 min
Mar 19, 9:07 PM ESTSevere Thunderstorm WarningGSPElbert53 min

Nearby

Flash Flood Warnings in South Carolina, 2003Flash Flood Warnings in Georgia, 2003Every flash flood warning in 2003

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.