Alert archive / South Carolina / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 339, NWS Greenville-Spartanburg, SC

August 7, 2003Greenville County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 7, 2003, 3:06 PM EDT for Greenville County, Pickens County, South Carolina. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 7, 2003, 3:06 PM EDT (19:06 UTC)
Expired
Aug 7, 2003, 4:00 PM EDT
In force
54 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Counties, with a storm outline in the text

Counties Greenville County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 19:05 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.1 hours before the alert went out and 254 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 12:00Z on 2003-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 321 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, Peachtre/Fal Fld, GA at 12:00Z on 2003-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
321 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
698 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KGSP 071906
SVRGSP
SCC045-077-072000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
305 PM EDT THU AUG 7 2003

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GREENVILLE COUNTY IN UPSTATE SOUTH CAROLINA
  EASTERN PICKENS COUNTY IN UPSTATE SOUTH CAROLINA

* UNTIL 400 PM EDT

* AT 305 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM 11 MILES NORTHEAST OF PICKENS...OR ABOUT 4 MILES EAST
  OF PUMPKINTOWN...MOVING SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DACUSVILLE AT 325 PM EDT.
  TRAVELERS REST AT 330 PM EDT.
  PARIS MOUNTAIN STATE PARK AT 345 PM EDT.
  BEREA AT 400 PM EDT.

PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR
LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY
RAIN CAN OCCUR WITH ANY THUNDERSTORM.

LAT...LON 3512 8253 3504 8272 3473 8258 3484 8231

$$
RB/BPM

What forecasters said that day

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

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 9:30 AM EDT, 5 hours 36 minutes earlier.

Area forecast discussion, Aug 7, 9:30 AM EDT, 5 hours 36 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
930 AM EDT THU AUG 7 2003

FORECAST ON TRACK WITH SCT SHOWERS MOVING INTO MTNS...ISOLD ACROSS N
FOOTHILLS/PIEDMONT ATTM. WILL UPDATE TO REMOVE MENTION OF FOG...NO
OTHER CHANGES PLANNED.

.GSP...
GA...NONE.
NC...FLOOD WATCH FOR TODAY AND TONIGHT FOR ZONES NCZ033>037...
NCZ048>050...NCZ053>057...NCZ065>072...NCZ082.

SC...FLOOD WATCH FOR TODAY AND TONIGHT FOR ZONES SCZ003...
SCZ006>009...SCZ012>014.

RB
Hazardous weather outlook, Aug 7, 5:21 AM EDT, 9 hours 45 minutes before
GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014-
019-071100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
521 AM EDT THU AUG 7 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA...
UPSTATE SOUTH CAROLINA...AND EXTREME NORTHEAST GEORGIA.

.DAY ONE...TODAY

SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE WESTERN CAROLINAS
AND NORTHEAST GEORGIA TODAY AND THIS EVENING. WITH EXCESSIVE
RAINFALL EXPECTED...A FLOOD WATCH HAS BEEN ISSUED FOR TODAY AND
TONIGHT. THE WATCH COVERS PORTIONS OF THE WESTERN CAROLINAS
GENERALLY EAST OF A LINE THROUGH ASHEVILLE AND GREENVILLE. PLEASE
SEE THE LATEST FLOOD WATCH (FFAGSP) FOR ADDITIONAL DETAILS. OUTSIDE
THE WATCH AREA...SCATTERED STORMS MAY PRODUCE LOCALLY HEAVY
RAINFALL. A FLOOD POTENTIAL OUTLOOK (ESFGSP) WILL ADDRESS CONCERNS
FOR POSSIBLE FLOODING FOR TODAY THROUGH FRIDAY. IN ADDITION...SOME
OF THESE STORMS MAY REACH SEVERE LEVELS THIS AFTERNOON AND EVENING.
PLEASE SEE THE LATEST SEVERE WEATHER OUTLOOK (SPSGSP) FOR FURTHER
INFORMATION.

.DAYS TWO THROUGH SEVEN...

A FLOOD WATCH WILL REMAIN IN EFFECT FOR TONIGHT. A UPPER AREA OF LOW
PRESSURE WILL EXIST OVER THE FORECAST AREA FOR THE REST OF THE
PERIOD. THIS SYSTEM WILL LEAD TO THE DEVELOPMENT OF
THUNDERSTORMS...SOME MAY PRODUCE SEVERE WEATHER AND/OR EXCESSIVE
RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY AND TONIGHT.

NED

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 12:15 AM EDTFlash Flood WarningGSPGreenville, Spartanburg3 hr

Nearby

Severe Thunderstorm Warnings in South Carolina, 2003Every severe thunderstorm 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.