An area of thunderstorms developed along the Georgia, South Carolina line. One of the storms briefly became severe, producing a small area of damaging winds.
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The episode as NWS GSP wrote it up.
An area of thunderstorms developed along the Georgia, South Carolina line. One of the storms briefly became severe, producing a small area of damaging winds.
The local office's own words before the first event, 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 the first event at Aug 27, 1:22 PM EST, 1 hour 58 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 222 PM EDT THU AUG 27 2009 .SYNOPSIS... HIGH PRESSURE WILL WEAKEN OVER THE AREA AS A UPPER LEVEL LOW APPROACHES THE COAST OFF OF THE CAROLINAS. THE REMAINS OF THIS LOW WILL CROSS THE AREA FRIDAY. MEANWHILE A COLD FRONT WILL MOVE IN FROM THE WEST ON SATURDAY...CROSSING THE AREA ON SUNDAY. HIGH PRESSURE WILL BUILD OVER THE AREA EARLY NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/... DEEP SLY FLOW REMAINS OVER THE AREA TONIGHT AS AN UPPER LOW ALONG THE GULF COAST MOVES EASTWARD. THIS KEEPS DEEP PLUME OF TROPICAL MOISTURE OVER THE AREA. UPPER JET MAX AND SHORT WAVES MOVING AROUND THE LOW MOVE INTO THE AREA AS WELL. THIS WILL LEAD TO INCREASING FORCING AND UPPER DIVERGENCE OVERNIGHT. EVEN THOUGH INSTABILITY WILL BE WEAK...THE FORCING AND MOISTURE WILL LEAD TO INCREASING CONVECTIVE COVERAGE FROM WEST TO EAST. WITH VERY HIGH PRECIP WATER VALUES...SLY FLOW AND DECENT FORCING...PERIODS OF HEAVY RAIN COULD DEVELOP ACROSS THE WRN CWFA...ESP AFTER MIDNIGHT. WITH FLASH FLOOD GUIDANCE RUNNING QUITE HIGH AND THE POSSIBILITY OF GULF COAST CONVECTION ROBBING BEST LOW LEVEL MOISTURE TRANSPORT...DO NOT EXPECT ANY WIDESPREAD FLOODING. HOWEVER...IF CELLS TRAIN OR BECOME ANCHORED TO TERRAIN...ISOLATED FLOODING IS CERTAINLY POSSIBLE. LOWS SHOULD BE WARM AND MUGGY WITH INCREASING CLOUDS AND PRECIP. THIS GENERAL SCENARIO CONTINUES FRIDAY AS THE UPPER LOW SLOWLY OPENS AND TURNS NORTHEAST. THE VERY MOIST ATMOSPHERE REMAINS OVER THE AREA WITH GOOD UPPER DIVERGENCE AND FORCING CONTINUING. EXPECT AT LEAST LIKELY COVERAGE OF CONVECTION SPREADING ACROSS THE AREA THRU THE DAY. THE HEAVY RAIN THREAT CONTINUES WITH ALL THESE MAJOR FEATURES REMAINING IN PLACE. THE POTENTIAL LIMITING FACTOR OF GULF COAST CONVECTION ALSO CONTINUES...SO WILL HAVE TO SEE HOW MUCH RAIN FALLS OVERNIGHT TO DETERMINE IF WIDESPREAD FLOODING BECOMES MORE PROBABLE. THE ISOLATED THREAT WILL CONTINUE THOUGH. HIGHS WILL BE WELL BELOW NORMAL WITH THE CLOUDS AND PRECIP. && .SHORT TERM /FRIDAY THROUGH SUNDAY/... AS OF 205 PM THU...AS THE AREA OF UPPER FORCING/DEEP LAYER MOISTURE LIFTS TO THE NORTHEAST...LIKELY POPS WILL BE MAINTAINED ACROSS THE NORTHWEST NC PIEDMONT/NRN FOOTHILLS FRI EVENING...BEFORE DIMINISHING TO SLIGHT/LOW CHANCES AFTER MIDNIGHT. ALTHOUGH THE DEEPER TROPICAL MOISTURE WILL BE NORTHEAST OF THE CWFA ON SATURDAY...A FRONTAL BOUNDARY APPROACHES FROM THE WEST DURING THE AFTERNOON...DRAWING ADDITIONAL MOISTURE FROM THE GULF. HOWEVER...DO NOT SEE MUCH SUPPORT FOR ANYTHING OTHER THAN LOW/MID CHANCE POPS SATURDAY AFTERNOON. WITH THE FRONT SLOWLY PUSHING ACROSS THE AREA SATURDAY NIGHT INTO SUNDAY...CHANCE POPS WILL LINGER THROUGH THE END OF THE SHORT TERM. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... AS OF 200 PM THU...THE GLOBAL MODELS ARE IN FAIRLY SOLID AGREEMENT IN DEPICTING A MAINLY DRY AND UNSEASONABLY MILD MEDIUM RANGE...AS THE LONG WAVE PATTERN WILL FAVOR AN EASTERN TROUGH THROUGH THE PERIOD. OTHER THAN SOME SLIGHT CHANCE POPS EARLY IN THE PERIOD... MAINLY NEAR THE DEEPER MOISTURE ACROSS THE SOUTHERN AND SOUTHEAST TIER OF THE CWFA...THE FORECAST WILL BE DRY. OTHERWISE...TEMPS ARE EXPECTED TO BE DOWNRIGHT PLEASANT ACROSS MUCH OF THE AREA DURING THE FIRST HALF OF THE WEEK...WITH MAXES EXPECTED TO AVERAGE A SOLID CATEGORY BELOW CLIMATOLOGY. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... KCLT AND ELSEWHERE...SCT CONVECTION WILL CONTINUE THRU THE AFTERNOON IN THE DEEP MOISTURE...WEAK INSTABILITY AND SLY FLOW. BEST CHC FOR ANY TERMINAL AFFECTS WILL BE THE SC SITES AND KAVL. CONVECTION WILL WEAKEN BUT CONTINUE INTO THE EVENING AS DEEP MOISTURE AND SLY FLOW CONTINUE AHEAD OF AN APPROACHING UPPER LEVEL LOW. EXPECT A BRIEF INCREASE IN CIGS BEFORE WRN SITES BECOME MVFR TOWARD MORNING. PRECIP COVERAGE...AND MVFR VSBY...WILL INCREASE FROM WEST TO EAST AS THE BETTER FORCING MOVES IN. LOOKS LIKE KCLT HAS THE LEAST CHC FOR ANY RESTRICTIONS DUE TO EXPECTED TIMING OF PRECIP ONSET. EXPECT GOOD COVERAGE OF PRECIP TO CONTINUE FRIDAY MORNING WITH SOME IMPROVEMENT TO LOW VFR. THAT SAID...CANNOT RULE OUT IFR ESPECIALLY AROUND DAYBREAK AT THE WRN SITES. WINDS WILL BE LIGHT SOUTH THE SE THIS AFTERNOON AND EARLY EVENING. LIGHT AND VARIABLE WINDS WILL CONTINUE THRU THE REST OF THE PERIOD. HOWEVER...NE WINDS COULD BECOME THE PREDOMINANT DIRECTION DURING THE MORNING. OUTLOOK...SHOWERS AND THUNDERSTORMS WILL CONTINUE FRIDAY AFTERNOON...ALONG WITH POSSIBLE CIG AND VSBY RESTRICTIONS. CONDITIONS WILL REMAIN UNSETTLED SATURDAY AND SUNDAY AS A COLD FRONT FRONT CROSSES THE REGION. BETTER WEATHER IS EXPECTED MONDAY AND TUESDAY. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...PAT NEAR TERM...RWH SHORT TERM...JDL LONG TERM...JDL AVIATION...RWH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 313 PM EDT THU AUG 27 2009 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-281915- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-ALEXANDER- IREDELL-DAVIE-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-CATAWBA- ROWAN-GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-GREATER BURKE- MCDOWELL MOUNTAINS-EASTERN MCDOWELL-RUTHERFORD MOUNTAINS- GREATER RUTHERFORD-POLK MOUNTAINS-EASTERN POLK-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-GREATER OCONEE- GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK- ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD- 313 PM EDT THU AUG 27 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE AREA THIS EVENING THROUGH THE OVERNIGHT HOURS. ALTHOUGH THE MAIN HAZARDS FROM THESE THUNDERSTORMS WILL BE CLOUD TO GROUND LIGHTNING AND HEAVY RAINFALL...LOCALLY EXCESSIVE RAINFALL AND ISOLATED FLASH FLOODING WILL BE POSSIBLE. URBAN AREAS AND MOUNTAINOUS TERRAIN WILL BE ESPECIALLY SUSCEPTIBLE TO FLOODING THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF FLASH FLOODING TO OUR OFFICE. LANE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 250 PM EDT THU AUG 27 2009 NCZ033-501-503-271945- AVERY-BURKE MOUNTAINS-CALDWELL MOUNTAINS- 250 PM EDT THU AUG 27 2009 ...THUNDERSTORMS PRODUCING HEAVY RAINFALL WILL AFFECT NORTHWESTERN BURKE...NORTHWESTERN CALDWELL AND SOUTHEASTERN AVERY COUNTIES THROUGH 345 PM EDT... AT 248 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A NEARLY STATIONARY THUNDERSTORM NEAR JONAS RIDGE...OR 7 MILES SOUTH OF NEWLAND. THIS THUNDERSTORM WAS PRODUCING RAINFALL AT THE RATE OF 1 TO 2 INCHES PER HOUR...AND WILL LIKELY CONTINUE TO PRODUCE HEAVY RAINFALL THROUGH 4 PM. MOST AFFECTED IN THIS AREA WILL BE THE LINVILLE RIVER...WILSON CREEK...AND HARPER CREEK. STREAM LEVELS MAY APPROACH OR EXCEED BANKFULL IN THESE AREAS...AND DEEP STANDING WATER WILL LIKELY DEVELOP IN NEARBY LOW LYING AREAS. HG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 331 PM EDT THU AUG 27 2009 GAZ010-017-018-NCZ062>065-SCZ001>005-272100- RABUN-HABERSHAM-STEPHENS-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-OCONEE MOUNTAINS-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- GREATER OCONEE-GREATER PICKENS- INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...TOCCOA... FRANKLIN...BREVARD...HENDERSONVILLE 331 PM EDT THU AUG 27 2009 ...HEAVY RAINFALL TO AFFECT THE EXTREME SOUTHERN APPALACHIANS THROUGH 5 PM THIS EVENING... A LINE OF HEAVY SHOWERS AND STRONG THUNDERSTORMS WILL MOVE SLOWLY NORTHWEST ACROSS THE WESTERN UPSTATE OF SOUTH CAROLINA...AND REACH THE NORTHEAST GEORGIA AND SOUTHERN NORTH CAROLINA MOUNTAINS THROUGH 5 PM THIS EVENING. THESE THUNDERSTORMS WILL PRODUCE RAINFALL AT RATES UP TO TWO INCHES PER HOUR...AND COULD PRODUCE ISOLATED FLOODING AND DEEP PONDING OF WATER ON ROADWAYS. THE HEAVIEST RAINFALL WILL AFFECT THE AREA FROM ROCKY BOTTOM TO WALHALLA THROUGH 415 PM...AND THEN LIKELY STRETCH FROM ROSMAN TO CASHIERS TO CLAYTON GEORGIA BY 5 PM. FLOOD ADVISORIES OR FLASH FLOOD WARNINGS COULD BE NEEDED IN THIS AREA IF ANY OF THE HEAVY SHOWERS PERSIST AGAINST THE EASTERN SLOPES OF THE HIGH TERRAIN. GERAPETRITIS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 355 PM EDT THU AUG 27 2009 SCZ013-272045- UNION- 355 PM EDT THU AUG 27 2009 ...A STRONG THUNDERSTORM WILL AFFECT UNION COUNTY IN SOUTH CAROLINA THROUGH 445 PM EDT... AT 355 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR UNION...MOVING NORTHWEST AT 10 MPH. THIS STORM WILL BE NEAR... UNION... BUFFALO... JONESVILLE... PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. HG
The Greer radar (KGSP), 98 km away, was scanning. The volume nearest the first event began at 20:18 UTC.
1 thunderstorm wind. Local standard time, as filed.
Multiple trees were blown down just off highway 123 near the South Carolina state line.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2009Every state in 2009This day in weather historyWarnings in Georgia, August 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 194872.