A small cluster of thunderstorms developed over eastern Tennessee and moved across the southwest mountains of North Carolina. The storms produced some wind damage.
Every event with a place to put it. Tap one for its entry below.
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 small cluster of thunderstorms developed over eastern Tennessee and moved across the southwest mountains of North Carolina. The storms produced some wind damage. Later in the evening new thunderstorms develop along the outflow boundary from these old storms, resulting in additional wind damage over the western Piedmont.
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 8, 1:09 PM EST, 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 209 PM EDT MON AUG 8 2011 .SYNOPSIS... A WEAK FRONTAL BOUNDARY ALONG WITH A HOT AND HUMID AIRMASS WILL LINGER ATOP THE REGION INTO TUESDAY. DRIER HIGH PRESSURE WILL BUILD OVER THE AREA ON WEDNESDAY. MOISTURE AHEAD OF THE NEXT COLD FRONT WILL RETURN BY SATURDAY. && .NEAR TERM /THROUGH TONIGHT/... AS OF 2 PM...AT MANY LOCATIONS THE TEMP TREND LAGS THE FCST...WHICH SUGGESTS THAT OUR HIGH TEMP FCST MIGHT BE A BIT TOO WARM. UNLESS THE TREND REVERSES...IT APPEARS AS THOUGH WE WILL NOT REACH HEAT ADVISORY CRITERIA...EVEN THOUGH IT WILL BE PLENTY HOT. CONVECTION HAS DEVELOPED VIGOROUSLY OVER ERN TN AND WILL MOVE INTO THE WRN MOUNTAINS SHORTLY AFTER 18Z. NEAR TERM POP TREND WILL BE ADJUSTED UPWARD ON THE TN BORDER...BUT CONFIDENCE NOT GREAT THAT IT WILL MAKE IT E OF THE BLUE RIDGE. MODELS SUGGEST A BETTER CHANCE ACROSS THE UPSTATE SO THE CHANCES WILL BE INCREASED THERE. EXPECT MORE ADJUSTMENTS LATER THIS AFTERNOON. REMAINDER OF PREVIOUS DISCUSSION... THE MOST INTERESTING PART OF THE SHORT TERM FORECAST IS THE POSSIBILITY OF AN MCS AFFECTING THE FA TONIGHT. THE 0300 UTC RUN OF OUR LOCAL WORKSTATION WRF IS IN VERY GOOD AGREEMENT WITH THE 0000 UTC GFS IN DEVELOPING AN MCS OVER MO THIS AFTN WHICH THEN TRACKS QUICKLY EASTWARD THIS EVENING...AFFECTING THE NC MTNS AROUND MIDNIGHT TONIGHT. THE NAM HAS AN MCS IN A SIMILAR LOCATION LATE IN THE AFTN...BUT IT DISSIPATES WITH CONVECTION REGENERATING FARTHER TO THE SOUTHWEST MUCH LATER TONIGHT. SPC FAVORED SUPERCELLS AND MULTICELL CLUSTERS CONSOLIDATING IN THAT AREA THIS AFTN AND MOVING ACROSS THE TN VALLEY TONIGHT...MORE LIKE THE GFS AND OUR LOCAL MODEL. THE DEEP LAYER SHEAR IS A LITTLE WEAK...THOUGH BEHIND THE CONVECTIVE SYSTEM H5 WINDS ARE ON THE ORDER OF 30 TO 35 KTS. WITH THE LLVL FLOW VEERING AND STRENGTHENING OVER MIDDLE TN BY LATE EVENING...THE MORE RAPID EASTWARD MCS PROPAGATION MAKES SENSE. IF ONLY THE NAM WERE ON BOARD I/D GO WITH LIKELY POPS TONIGHT. AS IT STANDS I/VE RAISED THEM TO 50 PERCENT A LITTLE AFTER MIDNIGHT ACROSS THE MTNS. CHANCE POPS HAVE BEEN RUN ACROSS THE REST OF THE FA DURING THE EARLY MORNING HOURS AS WELL. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/... AS OF 140 AM MONDAY...IT REMAINS TO BE SEEN WHAT EFFECTS ANY MCV OR REMNANTS THEREOF EFFECT DEEP CONVECTIVE DEVELOP EARLY TUESDAY...BUT ON THE SYNOPTIC SCALE...S/WV ENERGY AND LOW AMPLITUDE TROUGH REMAINS PROGGED TO SLIDE EAST ACRS THE CWFA. WITHIN THE LINGERING MOIST AIRMASS...PWATS PROGGED TO BE ABT 125 PERCENT OF NORMAL...AND WILL PLAN ON RAMPING UP TO MID-CHANCE POP CWFAWIDE AS BOTH THE NAM AND GFS THUNDER PROBABILITIES ARE EQUIVALENT TO THIS DESPITE THE EXPECTED DOWNSLOPE FLOW. WITH 85H TEMPS PROGGED TO REMAIN ABV 20 DEG C AND AIDED BY THE AFOREMENTIONED DOWNSLOPE...EXPECTING FTHL/PIEDMONT MAXES IN THE MID TO UPPER 90S. WESTERLY LLVL FLOW SHOULD ALSO AID IN BLYR DRYING AND LOWERING OF SFC DWPTS...SO APPARENT TEMPS SHOULD BE SIMILAR TO ACTUAL TEMPS. SUBTLE TROFINESS TRANSLATES DOWNSTREAM OF THE CWFA TUESDAY NIGHT AND A MUCH DRIER CONTINENTAL AIRMASS IS PROGGED TO OVERSPREAD THE REGION IN IT/S WAKE. BENEATH MODERATE WESTERLY FLOW ALOFT AND NW OF SFC TROUGHING...DEEP LAYERED DRYING LOOKS TO LINGER THRU WEDNESDAY. DOWNSLOPE AIDED DRYING/WARMING WILL SUPPORT PIEDMONT MAX TEMPS IN THE MID 90S...BUT THE DOWNWARD MIXING OF NOTABLY LOW DWPTS IS EXPECTED TO CAP ANY DEEP CONVECTIVE CHANCES. && .LONG TERM /THURSDAY THROUGH SUNDAY/... AS OF 330 AM MONDAY...THERE LOOKS TO BE LITTLE EVIDENCE AFTER REVIEWING THE RECENTLY POSTED 00 UTC OP GFS AND ECMWF FOR ANY CHANGES TO FCST FOR THURSDAY AND FRIDAY. EASTERN CONUS L/WV TROUGH REMAINS PROGGED TO DEAMPLIFY FRIDAY AND LLVL RIDGING COULD GIVE WAY TO SOME DEGREE OF RETURN FLOW MOISTURE BUT HESITANT AT THIS POINT TO BUMP UP POP GIVEN THE STILL DRY ECMWF SOLUTION. MAX TEMPS REMAIN ON TRACK TO FALL WITHIN A FEW DEG F OF THE MID-AUGUST CLIMO. INCREASED DEEP CONVECTIVE CHANCES WILL REMAIN SLATED FOR SATURDAY...AS AGAIN...OP MEDIUM RANGE MODEL SOLUTIONS ARE SIMILARLY DEVELOPING BROAD UPPER DIFFLUENCE DOWNSTREAM OF GREAT LAKES S/WV. UPPER TROUGH REASSERTS ITSELF ACRS THE EASTERN CONUS ON SUNDAY AS ATTENDANT COLD FRONT SAGS SOUTH INTO THE REGION. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... AT KCLT...VFR CONDITIONS THROUGH THE PERIOD. FOR THIS AFTERNOON AND EVENING...MAINLY A WIND FCST. TCLT RADAR WIND PROFILE SHOWS NW IN THE BOUNDARY LAYER SO EXPECT NW WINDS TO CONTINUE AT THE SFC FOR AT LEAST THE REMAINDER OF THE DAYLIGHT HOURS. FOR CLOUDS...ONLY A FEW HIGH-BASED STRATOCU TO DEAL WITH...ALTHO THERE IS A VERY REMOTE POSSIBILITY OF A SHOWER LATE THIS AFTERNOON. AM WATCHING CONVECTION MOVING ACROSS ERN TN WITH SOME INTEREST. WESTERLY WIND ALOFT IS LESS FAVORABLE FOR IT REACHING THE PIEDMONT. THERE IS A LOW CHANCE OF ANY RESTRICTIONS IN THE MORNING. SOME CONVECTIVE DEBRIS CLOUDS SHOULD ROLL IN AFTER SUNRISE TUESDAY. THINK ANY DEEPER CONVECTION WILL PROBABLY HOLD OFF UNTIL AFTER THE END OF THE TAF PERIOD. ELSEWHERE...GENERALLY A WESTERLY COMPONENT TO THE WIND THIS AFTERNOON...FUNNELLED BY THE TERRAIN. CONVECTION OVER ERN TN WILL BE WATCHED FOR IMPACT AT KAVL AND OTHER TAF SITES AND WILL AMEND ACCORDINGLY. THE BEST CHANCE MIGHT BE AROUND KGSP AROUND 21Z AS CONVERGENCE IN WNW FLOW MAY AID THE REDEVELOPMENT OF THE CONVECTION...AS SHOWN BY THE NAM AND WRF-NMM MODELS. FOR NOW...WILL LEAVE IT OUT. LATER TONIGHT A MORE ORGANIZED AREA OF SHRA/TSTMS MAY MOVE INTO THE MTNS. SOME FOG IS POSSIBLE AT KAVL AROUND SUNRISE. THERE SHOULD BE MORE CONVECTIVE DEBRIS CLOUDS AFTER SUNRISE TUESDAY. OUTLOOK...MOISTURE WILL GRADUALLY DIMINISH EARLY NEXT WEEK IN PERSISTENT WESTERLY FLOW. STILL EXPECT ISOLD-SCT SHWRS/TSTMS THRU THE PERIOD. AN EXPERIMENTAL AVIATION FORECAST CONSISTENCY TABLE SHOWING THE PERCENTAGE OF GUIDANCE MEMBERS AGREEING WITH THE SCHEDULED ISSUANCE CATEGORY IS AVAILABLE AT FOLLOWING LINK (USE LOWER CASE)... WWW.WEATHER.GOV/GSP/AVIATION/TABLES.HTM && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...CSH NEAR TERM...MCAVOY/PM SHORT TERM...CSH LONG TERM...CSH/SBK AVIATION...MCAVOY/PM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 554 AM EDT MON AUG 8 2011 GAZ018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-508- 510-SCZ004>014-019-091000- STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-DAVIE-CATAWBA-ROWAN- CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- GREATER CALDWELL-GREATER BURKE-EASTERN MCDOWELL-GREATER RUTHERFORD- EASTERN POLK-GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE- SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC- CHESTER-GREENWOOD- 554 AM EDT MON AUG 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. AS AFTERNOON HEAT INDEX VALUES REACH INTO THE LOWER 100S... ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP. IT IS NOT OUT OF THE QUESTION THAT A COUPLE OF THESE STORMS WILL PRODUCE DAMAGING WIND GUSTS OR HAIL TO THE SIZE OF QUARTERS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. GAZ010-017-NCZ033-048>053-058-059-062>065-501-503-505-507-509- SCZ001>003-091000- RABUN-HABERSHAM-AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE- GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS- RUTHERFORD MOUNTAINS-POLK MOUNTAINS-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- 554 AM EDT MON AUG 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY. IT IS NOT OUT OF THE QUESTION THAT A COUPLE OF THESE STORMS WILL PRODUCE DAMAGING WIND GUSTS OR HAIL TO THE SIZE OF QUARTERS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
915 AM EDT MON AUG 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0708 PM TSTM WND DMG 1 E BOILING SPRINGS SC 35.04N 81.96W
08/07/2011 SPARTANBURG SC 911 CALL CENTER
POWERLINES DOWN OFF OF KNOLLWOOD COURT. TIME ESTIMATED
FROM RADAR.
&&
ZHARGROVPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1038 AM EDT MON AUG 08 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0728 PM HAIL 2 NE SPARTANBURG 34.97N 81.90W
08/07/2011 E1.75 INCH SPARTANBURG SC POST OFFICE
CUSTOMER AT DRAYTON POST OFFICE REPORTED GOLF BALL SIZE
HAIL THAT DAMAGED HER YARD. TIME ESTIMATED FROM RADAR.
&&
ZHARGROVSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
208 PM EDT MON AUG 8 2011
NCZ051-058-081845-
GRAHAM-SWAIN-
208 PM EDT MON AUG 8 2011
...STRONG THUNDERSTORMS WILL AFFECT GRAHAM AND WESTERN SWAIN COUNTIES
THROUGH 245 PM EDT...
AT 204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM TALASSEE TO 6 MILES
SOUTHEAST OF CITICO TO 6 MILES WEST OF MURPHY...MOVING EAST AT 25
MPH.
THESE STORMS WILL BE NEAR...
TAPOCO...
SANTEETLAH LAKE...
FONTANA VILLAGE...
ROBBINSVILLE...
FONTANA LAKE...
PEOPLE IN GRAHAM AND WESTERN SWAIN COUNTIES...INCLUDING THE FOLLOWING
LOCATIONS...
TAPOCO...SANTEETLAH LAKE...FONTANA VILLAGE...ROBBINSVILLE...FONTANA
LAKE AND STECOAH...
SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE
WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE
WEATHER THREATEN.
MOTHBALL SIZE HAIL...AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH
THESE STORMS.
FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
LAT...LON 3537 8401 3541 8403 3548 8392 3553 8388
3553 8383 3557 8377 3558 8360 3557 8353
3526 8369 3524 8373 3525 8384 3521 8396
3523 8401 3531 8404 3536 8404
NEDThe Knoxville radar (KMRX), 104 km away, was scanning. The volume nearest the first event began at 18:38 UTC.
1 thunderstorm wind. Local standard time, as filed.
Two trees were blown down along highway 129. Power lines were also blown down in the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2011Every state in 2011This day in weather historyWarnings in North Carolina, August 2011
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: 340937.