A weakening line of thunderstorms moved out of Tennessee and into the North Carolina Mountains. One of the storms produced an isolated area of wind damage.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GSP wrote it up.
A weakening line of thunderstorms moved out of Tennessee and into the North Carolina Mountains. One of the storms produced an isolated area of wind damage.
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 11, 9:52 AM EST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1052 AM EDT TUE AUG 11 2009 .SYNOPSIS... AN UPPER LEVEL TROUGH WILL APPROACH THE REGION TUESDAY. THE ASSOCIATED COLD FRONT IS EXPECTED TO APPROACH THE CAROLINAS LATE TUESDAY INTO EARLY WEDNESDAY AND BRING COOLER TEMPERATURES IN ITS WAKE. UPPER LEVEL DISTURBANCES WILL CONTINUE TO EFFECT THE AREA THROUGH THE END OF THE WEEK WHILE THE BERMUDA HIGH ONCE AGAIN HELPS ESTABLISH MOIST SOUTHERLY FLOW OVER THE WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... WITH FAIRLY WARM AND INCREASINGLY MOIST PROFILES ACROSS THE REGION THIS AFTN...CAPE VALUES APPEAR SOMEWHAT LIMITED TO THE 1000 TO 2000 J/KG RANGE DESPITE THE HOT SFC TEMPERATURES AND HIGH SFC DEWPOINTS. STILL...INCREASING UPPER SUPPORT FROM THE WEST...COMBINED WITH LOW LEVEL CONVERGENGE EAST OF THE BLUE EARLY THIS AFTN...AND OUT OVER THE PIEDMONT LATE DAY...SHOULD ALLOW BETTER COVERAGE OF TSTMS TO DEVELOP. ANALYZED DCAPE VALUES ARE ALSO IN EXCESS OF 1000 J/KG TODAY...AND SLIGHTLY BETTER DEEP LAYER SHEAR COULD PERMIT MORE OF A DAMAGING WIND THREAT TO MATERIALIZE. WILL CONTINUE TO ADVERTISE THE BEST CHANCE POPS IN THE MTNS AND JUST EAST OF THE NC ESCARPMENT THROUGH EARLY AFTERNOON...WITH CHC POPS FANNING OUT ACROSS THE PIEDMONT THROUGH LATE DAY. TEMPS WILL GET ABOUT A ONE DEGREE BOOST IN MOST LOCATIONS EAST OF THE MTNS AS LITTLE TO NO CLOUDS HAVE ARRIVED/DEVELOPED YET. SCATTERED CONVECTION WILL PERSIST THROUGH THE EVENING...WITH ONLY A GRADUAL DIMINISHING IN COVERAGE...THANKS TO PLENTY OF MOISTURE/LINGERING INSTABILITY AND WEAKLY CYCLONIC UPPER FLOW. CHANCE POPS WILL CONTINUE THROUGH 06Z...WITH SLIGHT CHANCES LINGERING THROUGH THE END OF THE PERIOD. && .SHORT TERM /WEDNESDAY THROUGH FRIDAY/... AS OF 230 AM TUESDAY...THE SHORT TERM FCST BEGINS 12Z WEDNESDAY WITH THE UPPER TROUGH DIGGING ITS WAY DOWN OVER THE SOUTHERN APPALACHIANS. MODELS CONTINUE TO TILT THE TROUGH IN A NE TO SW ORIENTATION AND PUSH A SYNOPTIC BOUNDARY OVER THE CWA ON WED. THE BOUNDARY IS EXPECTED TO LINGER THROUGH THURS WITH THE BEST MOISTURE LOCATED OVER THE SE PORTIONS OF OUR AREA. ONCE THIS FEATURE FINALLY DISSIPATES...MOIST SOUTHERLY FLOW WILL ESTABLISH ITSELF OVER THE AREA AS THE BERMUDA HIGH PUSHES FURTHER WEST. WITH FAVORABLE MID/UPPER FORCING PRESENT AHEAD OF THE SHORTWAVE AND AMPLE MOISTURE OVER THE REGION...WE CAN EXPECT WIDESPREAD SHOWERS AND SOME THUNDERSTORMS THRU WED AND WED NIGHT. SOME OF THESE STORMS COULD BECOME SVR. SPC CURRENTLY HAS MUCH OF THE CAROLINAS IN A SLIGHT RISK CAT FOR DAY 2. I HAVE SHIFTED THE HIGHER POPS TO THE SE DURING THIS TIME TO REFLECT THE HIGHER MOISTURE PROFILES ON THE WARM SIDE OF THE BOUNDARY. ON THURS...I KEEP A SOLID CHANCE POPS THRU THE DAY WITH THE GREATEST COVERAGE LIKELY OVER THE SE PORTION OF THE CWA AS THIS IS WHERE THE MODELS CONTINUE TO SHOW THE GREATEST RH VALUES AND FAVORABLE ASCENT. THIS PATTERN SHOULD HOLD THRU THE END OF THE PERIOD AND WELL INTO THE MEDIUM RANGE AS THE BERMUDA HIGH GENERATES STEADY SOUTHERLY FLOW OVER THE EXTREME SE CONUS. TEMPS WHERE CHANGED VERY LITTLE FROM THE PREVIOUS FCST AND MAX VALUES SHOULD BE NEAR NORMAL IF NOT SLIGHTLY BELOW NORMAL ON THURS AND FRI. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... AS OF 3 AM TUESDAY...THE MEDIUM RANGE BEGINS 12Z FRIDAY WITH THE SUBTROPICAL BERMUDA HIGH SLOWLY PUSHING WESTWARD AND OVER THE EXTREME SE CONUS. AT THE SFC...THE REMNANTS OF THE FRONTAL BOUNDARY APPEAR TO DISSIPATE ONCE THE WEEKEND ARRIVES...HOWEVER THE TIMING REMAINS SOMEWHAT UNCERTAIN AS THERE ARE NO OTHER WELL DEFINED SYNOPTIC FEATURES OVER THE REGION. THE ATMOSPHERE IS STILL EXPECTED TO REMAIN UNSETTLED THRU THE WEEKEND AND INTO NEXT WEEK. AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THRU SUNDAY WITH THE MOIST AND SOMEWHAT UNSTABLE ENVIRONMENT. IT LOOKS LIKE WE CAN EXPECT SE/LY TO S/LY LOW LVL FLOW THROUGH THE PERIOD WITH SOME ENHANCED ISENTROPIC LIFT LIKELY EACH DAY AS WELL. SOLID CHANCE POPS REMAIN THRU DAY 6 WITH SLIGHT CHANCE KEPT FOR DAY 7. MAX TEMPS SHOULD BE RIGHT AROUND NORMAL...OR PERHAPS A COUPLE DEGREES BELOW....WHILE MINIMUM TEMPS COULD BE A COUPLE DEGREES ABOVE NORMAL WITH THE HIGH AMOUNT OF CLOUD COVER EXPECTED. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/... SIMILAR TO YESTERDAY...WINDS ARE GENERALLY NORTHWESTERLY AT MOST TERMINALS LATE THIS MORNING...BUT EXPECTED TO RETURN TO THE W/SW DURING THE AFTERNOON. CHANCES FOR DIURNAL CONVECTION WILL BE HIGHER TODAY THAN THEY/VE BEEN IN SOME TIME...OWING TO THE BREAKDOWN OF THE UPPER RIDGE/GOOD DESTABILIZATION...AND WEAK UPPER LEVEL DISTURBANCES. VCTS WILL BE CARRIED AT KAVL...WITH CB AT ALL OTHER TERMINALS BY LATE AFTERNOON. CONVECTION WILL BE SLOW TO DIMINISH THIS EVENING...SO CB WILL BE CARRIED AT MOST TERMINALS THROUGH ABOUT MIDNIGHT. OUTLOOK...TSTM CHANCES REMAIN RATHER HIGH WEDNESDAY AHEAD OF AN APPROACHING COLD FRONT. THE BOUNDARY WILL LIKELY STALL IN THE AREA...MAINTAINING CHANCES FOR MAINLY DIURNAL CONVECTION...AND EARLY MORNING FOG/STRATUS THROUGH LATE WEEK. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...JPT NEAR TERM...HG/JDL SHORT TERM...JPT LONG TERM...JPT AVIATION...HG/JDL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1055 AM EDT TUE AUG 11 2009 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-121500- 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- 1055 AM EDT TUE AUG 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE REGION THIS AFTERNOON THROUGH TONIGHT. SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS...LARGE HAIL...HEAVY RAINFALL...AND DANGEROUS CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. WITH THE APPROACH OF A COLD FRONT...SCATTERED SHOWERS AND THUNDERSTORMS ARE LIKELY WEDNESDAY AND WEDNESDAY EVENING. SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS...LARGE HAIL...HEAVY RAINFALL...AND DANGEROUS CLOUD TO GROUND LIGHTNING. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF LARGE HAIL...DAMAGING WINDS...TORNADOES OR FLASH FLOODING TO OUR OFFICE. HG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 102 PM EDT TUE AUG 11 2009 NCZ048-052-111800- HAYWOOD-MADISON- 102 PM EDT TUE AUG 11 2009 ...STRONG THUNDERSTORM WINDS WILL AFFECT NORTHWESTERN HAYWOOD AND WESTERN MADISON COUNTIES THROUGH 200 PM EDT... AT 1258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORM OUTFLOW WINDS APPROACHING THE TENNESSEE AND NORTH CAROLINA BORDER. THESE WINDS WILL BE NEAR WATERVILLE...SPRING CREEK AND HOT SPRINGS. WIND GUSTS AROUND 40 MPH ARE EXPECTED WITH THIS STORM. KRENTZ
The Knoxville radar (KMRX), 70 km away, was scanning. The volume nearest the first event began at 17:30 UTC.
1 thunderstorm wind. Local standard time, as filed.
Two small trees were snapped off on Revere Rd in the northeast part of the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2009Every state in 2009This day in weather historyWarnings in North Carolina, 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: 194855.