Scattered to numerous thunderstorms developed within a very unstable air mass across the Piedmont during the afternoon. A couple of isolated severe storms produced brief microbursts across the Southern Upstate.
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.
Scattered to numerous thunderstorms developed within a very unstable air mass across the Piedmont during the afternoon. A couple of isolated severe storms produced brief microbursts across the Southern Upstate.
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 Jul 9, 11:07 AM EST, 9 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1207 PM EDT WED JUL 9 2014
.SYNOPSIS...
SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY IN
THE MOIST AIR MASS AHEAD OF A COLD FRONT ENTERING THE REGION. THAT
FRONT WILL STALL OVER THE AREA TONIGHT AND ENHANCE PRECIPITATION
CHANCES THURSDAY BEFORE WEAKENING FRIDAY. WEAK HIGH PRESSURE WILL
RETURN THROUGH THE WEEKEND BEFORE ANOTHER COLD FRONT APPROACHES THE
AREA EARLY NEXT WEEK.
&&
.NEAR TERM /THROUGH TONIGHT/...
AT 1205PM...NOT MUCH CHANGE IN THINKING FOR THIS UPDATE. RADAR
RETURNS INCREASING TO THE WEST AND EXPECT THAT AS A WEAK S/W
TRAVERSES THE AREA THAT COVERAGE OF SHOWERS/STORMS WILL INCREASE.
SBCAPES HAVE INCREASED TO OVER 2000J/KG OVER A LARGE PORTION OF
THE UPSTATE AND CLT METRO AREA. HOWEVER....STILL SOME LOW LEVEL
CIN INHIBITING CONVECTION SO IT WILL BE COUPLE MORE HOURS BEFORE
DEEP CONVECTION CAN GET GOING. MADE SOME MINOR ADJUSTMENTS TO GRID
FIELDS BASED ON LATEST CONSSHORT DATA...BUT NO CHANGES TO POP
TRENDS.
AS OF 1015 AM...NOT MANY ECHOES ON RADAR AT MID MORNING.
HOWEVER...CAMS, 12Z NAM AND RAP ALL INDCIATE THAT COVERAGE WILL
INCREASE THIS AFTERNOON AS ATMOSPHERE DESTABLIZES WITH AFTERNOON
HEATING. RAP INDICATES A WEAK SHORT WAVE OVER EASTERN TN WHICH MOVES
THROUGH THE WESTERN CAROLINAS AND NE GA BY 00Z. THIS SHOULD
PROVIDE JUST ENOUGH UPPER FORCING TO PRODUCE SCT TO EVEN NUMEROUS
SHOWERS/THUNDERSTORMS. OUR LOCAL CAMPOP GUIDANCE SHOWS THE BEST
COVERAGE NORTH OF I-85 THIS AFTERNOON WITH THE ACTUAL HIGHEST POPS
OVER THE NC FOOTHILLS/NC PIEDMONT. HAVE ADJUSTED THE POP GRIDS TO
DEPICT THAT GENERAL SCENARIO BY BLENDING CAMPOP/CONSSHORT. CAN'T
RULE OUT A FEW STORMS THAT WILL PRODUCE SOME GUSTY WINDS/HAIL...BUT
THE OVERALL SEVERE THREAT IS ON THE LOW SIDE AS SHEAR IS
UNIMPRESSIVE. BLENDED IN THE LATEST CONSHORT DATA TO ADJUST
TEMPS/DEWPOINTS WINDS. THIS GENERALLY LOWERED MAX TEMPS BY A DEGREE
OR TWO DUE TO A BIT MORE CLOUDINESS.
PREVIOUS DISCUSSION:
THERE IS VERY LITTLE ONGOING CONVECTIVE ACTIVITY IN OR IMMEDIATELY
UPSTREAM OF THE CWA...NOT SURPRISING CONSIDERING THAT THE AREA IS
WITHIN AN INSTABILITY MINIMUM. NEVERTHELESS...THERE IS STILL SOME
WEAK BUOYANCY UPSTREAM OVER THE TENN VALLEY...AND LATEST KGSP VAD
WIND PROFILE IS CONFIRMING A STOUT 25 TO 35 KTS OF WESTERLY FLOW
ABOVE ABOUT 2 KFT. IN ADDITION...SCATTERED SHOWERS WERE DEVELOPING
AT 07Z ALONG THE WINDWARD SIDE OF THE CUMBERLAND PLATEAU...WHICH
WOULD PROBABLY ARRIVE IN THE FAR WESTERN NC MTNS BY THE START OF THE
PERIOD. WE WILL CONTINUE TO RAMP POPS UP TO HIGH CHANCE ACROSS THE
TENN BORDER COUNTIES BY SUNRISE.
OTHERWISE...THE CONVECTIVE SETUP FOR LATER TODAY LEAVES MUCH TO BE
DESIRED. THE FRONTAL ZONE...SUCH AS IT IS...IS STILL DRAPED FROM THE
OHIO VALLEY W/SW TOWARD THE ARKLATEX. IN OTHER WORDS...IT HAS A LONG
WAY TO GO TO BE A PLAYER IN CONVECTIVE CHANCES ACROSS OUR AREA THIS
AFTERNOON. IN FACT...IT MAY TURN OUT THAT THE MAIN FOCUS (OTHER THAN
THE USUAL TERRAIN/DIFFERENTIAL HEATING EFFECTS) MAY BE A LEE SIDE
TROUGH...BUT EVEN THAT MAY BE MORE OF A CONCERN FOR AREAS JUST TO
OUR EAST. ADDITIONALLY...THERE IS A FAIRLY STRONG SIGNAL IN THE
LATEST MODEL GUIDANCE...AND IN OBSERVATIONAL TRENDS...THAT PESKY
MID/HIGH LEVEL CLOUDS WILL HINDER DIURNAL DESTABILIZATION. IN
FACT...FOR THIS VERY REASON THE MAX TEMP FORECAST IS 2-4 DEGREES
LOWER THAN WHAT WE HAVE SEEN THE PAST COUPLE OF DAYS. FINALLY...
WHILE PROFILES WILL BE MOISTENING CONSIDERABLY...FORECAST PWATS ARE
ONLY 1-2 STANDARD DEVIATIONS ABOVE CLIMO. ALL THINGS CONSIDERED...
HAVE ESSENTIALLY OPTED FOR A SHOTGUNNED 40-50 POPS ACROSS THE CWA...
WITH A SMALL AREA OF LIKELY ACROSS THE SOUTHWEST MTNS...WHICH WILL
HAVE THE BENEFIT OF A CONTINUED (ALBEIT WEAKENING) W/SW UPSLOPE
FLOW. IN TERMS OF THE SEVERE THREAT...MODEST INSTABILITY/MOIST
PROFILES AND WEAKENING SHEAR SHOULD LIMIT THE POTENTIAL
CONSIDERABLY. HOWEVER...THE PIEDMONT WILL HAVE TO BE WATCHED
CLOSELY...ESPECIALLY IF INSOLATION/HEATING IS MORE SIGNIFICANT THAN
EXPECTED.
THE FRONTAL ZONE WILL FINALLY SETTLE INTO THE AREA TONIGHT...BUT BY
THAT TIME...WITH WIND PROFILES WEAKENING AND MODEST AT BEST
NOCTURNAL INSTABILITY...SUSPECT IT WILL BE DIFFICULT TO GET MUCH
MORE THAN SCATTERED CONVECTION FOR TOO LONG PAST MID-EVENING OR SO.
MIN TEMPS WILL REMAIN ABOVE CLIMO UNDER CONSIDERABLE CLOUD
COVER.
&&
.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
AS OF 200 AM WED...SFC FRONT WILL SLOWLY MOVE SEWD THRU THE DEEP
SOUTH AND THE CAROLINAS FROM THURSDAY INTO EARLY SATURDAY...WHILE
BROAD HIGH PRESSURE BUILDS TOWARD THE EAST COAST AS HEIGHTS RISE
ALOFT. DEEP THICKNESSES DO NOT DROP APPRECIABLY BEHIND THE
FRONT...AND IN SOMEWHAT OF A DEPARTURE FROM PREVIOUS RUNS...LATEST
MODEL SOLUTIONS APPEAR TO WEAKEN THE FRONT AND VIRTUALLY WASH IT OUT
OVER THE PIEDMONT INSTEAD OF PUSHING IT OFF TO THE COAST AS BEFORE.
HOWEVER THIS DIFFERENCE DOES NOT IMPLY MAJOR CHANGES TO THE FCST
TRENDS SINCE THE FRONT SHOULD MAINLY JUST SERVE TO FOCUS DIURNAL
CONVECTION ACRS THE AREA. WILL CONTINUE TO ADVERTISE HIGH CHANCE POPS
THU...BUT WILL KEEP A SCHC OVER MOST AREAS THRU THU NIGHT. WHATEVER
WEAK LLVL FORCING PERSISTS LOOKS UNLIKELY TO FIRE MUCH
CONVECTION...BUT THE MERE PRESENCE OF THE BOUNDARY AND MODEST LAPSE
RATES WARRANT A LOW POP MENTION. BY FRIDAY MODEL QPF RESPONSE FAVORS
THE SC MIDLANDS AND CENTRAL NC. MOSTLY SCHC POPS ARE ADVERTISED...BUT
THESE TOO ARE SLOW TO DIMINISH FRI NIGHT.
CONSENSUS OF NAM/SREF INDICATES CAPE VALUES EACH AFTERNOON WILL BE
TYPICAL FOR THE SEASON...1000-2000 J/KG...THOUGH THE GFS IS MORE
STABLE FRIDAY WITH MORE OF THE REGION ON THE COOL SIDE OF THE FRONT.
H5 WINDS AND SHEAR PROFILES ARE UNIMPRESSIVE...AND PWAT VALUES REMAIN
NEAR CLIMO. SEVERE THREAT WITH CELLS WILL BE NONZERO BUT NOT
PARTICULARLY NOTABLE...THOUGH LOCALLY HEAVY RAIN IS LIKELY THURSDAY
BEFORE DRIER AIR MOVES IN ALOFT. TEMPS WILL REMAIN JUST BELOW NORMAL.
&&
.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
AS OF 300 AM TUE...WHILE SOME VESTIGE OF A FRONTAL BOUNDARY MAY
REMAIN OVER THE COASTAL PLAIN THIS WEEKEND...THE PATTERN ACRS THE
REGION WILL BE DOMINATED BY BERMUDA HIGH AT THE SFC. THAT WILL
MAINTAIN LIGHT SOUTHERLY FLOW INTO THE FA...BUT INSTEAD OF KEEPING
US CAPPED THRU SUBSIDENCE...BROADLY CYCLONIC UPPER FLOW ABOVE IT
WILL KEEP CONDITIONS MODESTLY FAVORABLE FOR DIURNAL CONVECTION. THIS
IS THE PREVAILING SIGNAL FOR POPS DURING THE PERIOD. TEMPS WILL
TREND FROM SLIGHTLY BELOW NORMAL SATURDAY TO SLIGHTLY ABOVE NORMAL
BY TUESDAY.
A FRONT WILL DIVE THRU THE NRN PLAINS OVER THE WEEKEND AS TROUGH DIGS
ACRS ERN CANADA. A WEAK LEADING FRONT WILL PUSH THRU THE OH/TN
VALLEYS AND INTO THE AREA MONDAY...ENHANCING PRECIP COVERAGE. THE
TROUGH AMPLIFIES FURTHER IN THE MIDDLE OF THE WEEK WHICH BRINGS THE
STRONGER FRONT SWD TOWARD US. CURRENT GUIDANCE PUTS THIS ON WED
BEYOND THE END OF THE FCST.
&&
.AVIATION /16Z WEDNESDAY THROUGH SUNDAY/...
AT KCLT AND ELSEWHERE (EXCEPT KAVL)...CANNOT RULE OUT A FEW SHOWERS
POPPING UP OR MOVING OUT OF THE MTNS AT JUST ABOUT ANYTIME THIS
MORNING...BUT COVERAGE SHOULD BE VERY SPARSE UNTIL AFTERNOON.
OTHERWISE...PREVAILING VFR CONDITIONS ARE EXPECTED (OUTSIDE OF
SHOWERS/TSTORMS) THROUGH THE PERIOD. COVERAGE OF CONVECTION IS
EXPECTED TO INCREASE THIS AFTERNOON...BUT THERE IS STILL SOME
UNCERTAINTY AS TO THE DEGREE OR COVERAGE. OUR BEST EDUCATED GUESS
CONTINUES TO INDICATE COVERAGE SHOULD REMAIN SCATTERED...AND ALL
TAFS SEE A PROB30 DURING THE AFTERNOON THROUGH MID EVENING OR SO.
AT KAVL...OTHER THAN PERHAPS A STRAY SHOWER OR TWO DEVELOPING NEAR
THE TENN BORDER AND PASSING NEAR THE TERMINAL THIS MORNING...THE
BULK OF CONVECTIVE ACTIVITY SHOULD HOLD OFF UNTIL AFTERNOON...WHEN A
TEMPO IS BEING CARRIED BETWEEN 18Z AND 22Z...ALTHOUGH CONVECTIVE
CHANCES WILL CONTINUE INTO THE EVENING. WE ARE STILL WAITING FOR A
FOGGY NIGHT TO OCCUR AT KAVL...AND WHILE IT IS UNCLEAR THAT TONIGHT
WILL BE THE NIGHT...BASED UPON A CONSENSUS OF GUIDANCE...MVFR VISBY
HAS BEEN INTRODUCED TOWARD DAYBREAK.
OUTLOOK...SCATTERED MAINLY AFTN THUNDERSTORMS WILL CONTINUE THROUGH
LATE WEEK INTO THE WEEKEND AS HIGH PRESSURE SLOWLY SETTLES OVER THE
AREA. ANY RESTRICTIONS WOULD BE CONFINED TO DIURNAL TSTMS AND
MORNING VALLEY FOG EACH DAY.
CONFIDENCE TABLE...
16-22Z 22-04Z 04-10Z 10-16Z
KCLT HIGH 100% HIGH 100% HIGH 100% HIGH 100%
KGSP HIGH 100% HIGH 100% HIGH 100% HIGH 100%
KAVL HIGH 100% HIGH 100% HIGH 80% HIGH 80%
KHKY HIGH 100% HIGH 100% HIGH 100% HIGH 87%
KGMU HIGH 100% HIGH 100% HIGH 100% HIGH 100%
KAND HIGH 100% HIGH 100% HIGH 100% HIGH 87%
THE PERCENTAGE REFLECTS THE NUMBER OF GUIDANCE MEMBERS AGREEING
WITH THE SCHEDULED TAF ISSUANCE FLIGHT RULE CATEGORY. COMPLETE
HOURLY EXPERIMENTAL AVIATION FORECAST CONSISTENCY TABLES AND ENSEMBLE
FORECASTS ARE AVAILABLE AT THE FOLLOWING LINK: (MUST BE LOWER CASE)
WWW.WEATHER.GOV/GSP/AVIATION_TABLES
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...NONE.
SC...NONE.
&&
SYNOPSIS...WIMBERLEY
NEAR TERM...LG
SHORT TERM...WIMBERLEY
LONG TERM...WIMBERLEY
AVIATION...JDLHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 441 AM EDT WED JUL 9 2014 NCZ033-048>053-058-059-062>065-501-503-505-507-509-100845- 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- 441 AM EDT WED JUL 9 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MOUNTAINS OF WESTERN NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS WILL OCCUR ACROSS THE NORTH CAROLINA MOUNTAINS TODAY. OCCASIONAL CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY RAINFALL WILL BE THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..FRIDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..SATURDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..SUNDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504- 506-508-510-SCZ001>014-019-100845- RABUN-HABERSHAM-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-OCONEE MOUNTAINS-PICKENS MOUNTAINS- GREENVILLE MOUNTAINS-GREATER OCONEE-GREATER PICKENS- GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE- LAURENS-UNION SC-CHESTER-GREENWOOD- 441 AM EDT WED JUL 9 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...THE FOOTHILLS AND PIEDMONT OF NORTH CAROLINA...AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS WILL OCCUR ACROSS THE FOOTHILLS AND PIEDMONT TODAY. OCCASIONAL CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY RAINFALL WILL BE THE PRIMARY THREATS. ISOLATED SEVERE WEATHER MAY OCCUR IN THE FORM OF DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. ..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..FRIDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..SATURDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..SUNDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. ..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... NONE. WIMBERLEY
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
819 AM EDT WED JUL 09 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 PM FLASH FLOOD 4 NW CHARLOTTE 35.24N 80.88W
07/03/2014 MECKLENBURG NC PUBLIC
2 FEET OF WATER OVER ROADWAY ON FREEDOM DRIVE
&&
LVISINPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
912 AM EDT WED JUL 09 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0630 PM TSTM WND DMG 1 WSW BRYSON CITY 35.42N 83.47W
07/08/2014 SWAIN NC 911 CALL CENTER
TREE DOWN ON BUCKNER BRANCH RD
&&
LVISINThe Greer radar (KGSP), 67 km away, was scanning. The volume nearest the first event began at 16:14 UTC.
2 thunderstorm wind. Local standard time, as filed.
County comms reported multiple trees and power lines blown down and a few shingles removed from the roof of a Fire Dept building.
County comms reported a section of roof was removed from a fast food restaurant along Highway 72 at Lake Greenwood.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2014Every state in 2014This day in weather historyWarnings in South Carolina, July 2014
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: 525369, 525372.