Severe Thunderstorm Warning 307, NWS Greenville-Spartanburg, SC

142 
WWUS52 KGSP 162359
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
759 PM EDT TUE SEP 16 2014

NCC179-170009-
/O.EXP.KGSP.SV.W.0307.000000T0000Z-140917T0000Z/
UNION NC-
759 PM EDT TUE SEP 16 2014

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN UNION COUNTY IN THE
PIEDMONT OF NORTH CAROLINA WILL EXPIRE AT 800 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LEVELS.  HOWEVER SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE STILL
POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3496 8029 3495 8030 3482 8031 3481 8032
      3481 8045 3501 8054 3513 8035 3507 8028
      3503 8029
TIME...MOT...LOC 2359Z 320DEG 21KT 3486 8025

$$

ARK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
ISSUED BY NATIONAL WEATHER SERVICE COLUMBIA SC
454 PM EDT TUE SEP 16 2014

.SYNOPSIS...
A WEAK BACK DOOR COLD FRONT WILL SLIDE THROUGH REGION THIS EVENING
WITH ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS POSSIBLE ALONG
AND AHEAD OF THE FRONT.  OTHERWISE...HIGH PRESSURE TO THE NORTH
USHERING IN NORTHERLY FLOW ON WEDNESDAY WILL LEAD TO MUCH COOLER AND
DRIER AIR FOR THE REMAINDER OF THE WORK WEEK...LASTING THROUGH THE
WEEKEND.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
AS OF 450 PM EDT TUESDAY...CONVECTION CONTINUES TO EXPAND THIS
AFTERNOON ACROSS THE REGION AMONGST A MODERATELY UNSTABLE
AIRMASS. LATEST SPC MESOANALYSIS INDICATES UPWARDS OF 2000J/KG
SBCAPE PRESENT ALONG THE I85 CORRIDOR WITH A DISTINCT MAXIMA
ACROSS PORTIONS OF THE SC UPSTATE. THE ENVIRONMENT WILL REMAIN
FAVORABLE FOR DAMAGING WINDS AND POTENTIALLY SEVERE HAIL THROUGH
THE AFTERNOON. CURRENT FORECAST REMAINS ON TRACK THEREFORE NO
CHANGES WERE MADE.

PREVIOUS DISCUSSION...

AS OF 240 PM EDT TUESDAY...LATEST SPC MESOANALYSIS INDICATES A
RATHER LARGE AND INCREASINGLY UNSTABLE AIRMASS ACROSS MUCH OF THE
LOWER TERRAIN OF NORTHEAST GA AND THE WESTERN CAROLINAS.  CONVECTION
INITIATING ACROSS THE FOOTHILLS OF THE BLUE RIDGE INTO THE NC
PIEDMONT WILL CONTINUE THROUGH THE AFTERNOON WITH COVERAGE EXPANDING
SOUTHWARD INTO THE UPSTATE OF SC AND NORTHEAST GA.  SOUNDINGS ACROSS
THESE ZONES DO INDICATE DECENT CAPE THROUGH THE LOWEST 400MB WITH
INCREASING SHEAR AHEAD OF AN APPROACHING WEAK UPPER SHORT WAVE.
THUS...AFTERNOON FORECAST FEATURES ISOLATED/SCATTERED POPS WITH A
FEW STRONG THUNDERSTORMS POSSIBLE WITH GUSTY WINDS AND CLOUD TO
GROUND LIGHTNING BEING THE PRIMARY THREATS.  OTHERWISE...ASIDE FOR
POSSIBLE/BRIEF REDEVELOPMENT ALONG BACK DOOR FRONTAL
BOUNDARY...EXPECTING CONVECTION TO ERODE BY LATE EVENING AS HEATING
SUBSIDES AND DRY AIR ADVECTS IN.  GUIDANCE DOES INDICATE THAT THE
BOUNDARY ITSELF WILL BE RATHER SLOW TO PUSH THROUGH THE PIEDMONT
REGIONS OF NC/SC OVERNIGHT LEADING TO CONTINUED CLOUDINESS AND LOW
END PRECIPITATION CHANCES INTO MORNING ALONG AND EAST OF I77.

FOR WEDNESDAY...HIGH PRESSURE SLIDING EAST THROUGH THE OHIO VALLEY
WILL CONTINUE TO DOMINATE THE WEATHER PATTERN LEADING TO PREVAILING
NORTHERLY FLOW AND WELL BELOW NORMAL TEMPERATURES AMIDST MOSTLY
SUNNY SKIES.  FORECAST WILL REMAIN DRY FOR MOST OF THE REGION WITH
ONLY ISOLATED SHOWERS POSSIBLE ACROSS THE EAST WHERE LINGERING
FRONTAL MOISTURE RESIDES...AND ALSO ALONG PORTIONS OF THE WESTERN NC
MOUNTAINS WHERE UPSLOPE FLOW COULD INDUCE A FEW SHOWERS.  NOT
EXPECTING ANY DEEP CONVECTION ON TUESDAY AS DRIER/COOLER BOUNDARY
LAYER WILL INHIBIT INSTABILITY THROUGHOUT THE DAY.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/...
AS OF 245 PM TUE...LONG WAVE TROF REMAINS OVER THE ERN CONUS THRU
THE PERIOD...ALTHOUGH THE AXIS DOES MOVE OFF SHORE BY THE END OF
THE PERIOD. A SERIES OF WEAK SHORT WAVES MOVE ACROSS THE AREA THRU
THE TROF. HOWEVER...THERE IS LITTLE DEEP MOISTURE AND FORCING
ASSOCIATED WITH THESE SYSTEMS. THERE IS QUITE A BIT OF LOW LEVEL
MOISTURE AND SOME MECHANICAL FORCING IN THE LOW LEVEL ELY FLOW
WITH SFC HIGH PRESSURE REMAINING RIDGED INTO THE AREA FROM THE
NORTH. HOWEVER...FORECAST SOUNDINGS SHOW THE ATMOS REMAINS CAPPED
THRU THE PERIOD WITH WARM MID LEVEL TEMPS. THEREFORE...HAVE GONE
WITH A DRY FORECAST THRU THE PERIOD...EXCEPT FOR SOME LINGERING
CONVECTION WED EVENING. THERE SHUD BE QUITE A BIT OF NIGHT TIME
CLOUDS WITH THE LOW LEVEL MOISTURE AND ELY FLOW...WITH SOME
CLEARING DURING THE DAY. TEMPS WILL BE AROUND 5 DEGREES BELOW
NORMAL.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
AS OF 300 PM TUE...UPPER TROF BRIEFLY BUILDS INTO THE AREA EARLY
IN THE MEDIUM RANGE AS AN UPPER TROF MOVES OFF SHORE. ANOTHER
UPPER TROF BUILDS OVER THE ERN CONUS ON MON AND REMAINS ON TUE. AT
THE SFC...HIGH PRESSURE REMAINS RIDGED INTO THE AREA FROM THE
NORTH WITH A MODERATING AIR MASS UNTIL A COLD FRONT CROSSES THE
AREA MONDAY. HIGH PRESSURE BEGINS TO BUILD IN AS THE FRONT SLOWLY
MOVES EAST ON TUE. EXPECT A DRY FCST FRI AND SAT...WITH ONLY A
SLIGHT CHC OF PRECIP MOVING IN ACROSS THE WEST AHEAD OF THE FRONT
ON SUN. MTNS WILL SEE THE BEST CHC OF PRECIP MON WHERE MOISTURE
AND FORCING ARE HIGHEST. PRECIP CHC DIMINISHES TO SLIGHT CHC FOR
TUE AND MAINLY OUTSIDE OF THE MTNS IN THE LINGERING MOISTURE
BEHIND THE SLOW MOVING FRONT. BELOW NORMAL TEMPS RISE TO A LITTLE
ABOVE NORMAL AHEAD OF THE FRONT...THEN DROP A LITTLE BELOW NORMAL
BEHIND THE FRONT ON TUE.

&&

.AVIATION /21Z TUESDAY THROUGH SUNDAY/...
AT KCLT...VFR CONDITIONS WILL PREVAIL THROUGH THE MAJORITY OF THE
FORECAST CYCLE WITH THE EXCEPTION OF POSSIBLE AFTERNOON TSRA AND
EARLY MORNING VISB/CIG RESTRICTIONS. INITIALIZED TAF WITH LIGHT
NORTHWEST WINDS AND BKN LOW VFR CU WITH A 4HR TEMPO FROM 22-02Z TO
ACCOUNT FOR AFTERNOON CONVECTION IN THE WARM SECTOR AHEAD OF AN
APPROACHING BACK DOOR FRONTAL BOUNDARY. BEYOND THAT...KEPT PROB30
IN THE NEXT FM GROUP AS LATEST CAMS INDICATED POTENTIAL FOR
REDEVELOPMENT AS THE FRONT ITSELF SLIDES THROUGH LATER THIS
EVENING. LATEST NAM RUNS SLOW THE FRONTAL PROGRESSION THROUGH THE
REGION OVERNIGHT LEADING TO PERSISTENT MVFR CIGS/VISB RESTRICTIONS
THROUGH MORNING WITH VISB IMPROVING BY LATE MORNING. KEPT
NORTHERLY WINDS AND MVFR CIGS THROUGH THE REMAINDER OF THE PERIOD
AS SOUNDINGS INDICATE CONTINUED SATURATION IN THE MOIST LOW
LEVELS.

ELSEWHERE...MUCH THE SAME AS KCLT ABOVE WITH VFR CONDITIONS
PREVAILING THROUGH THE MAJORITY OF THE FORECAST PERIOD ASIDE FOR
AFTERNOON TSRA AND EARLY MORNING VISB/CIG RESTRICTIONS.
INITIALIZED ALL TAF SITES WITH VCTS MENTION WITH EMBEDDED TEMPO
GROUPS FOR TSRA AND 4SM VISB WITH SLIGHT TIMING DIFFERENCES
DEPENDING ON SITE LOCATION. CONTINUED WITH VCTS MENTION BEYOND
TEMPOS AT ALL SITES EXCEPT FOR KAVL AS THE FRONTAL BOUNDARY SLIDES
SOUTHEAST. FURTHER CIG AND VISB RESTRICTIONS ARE EXPECTED
OVERNIGHT AT ALL SITES...WITH GUIDANCE HITTING THE MOUNTAIN
VALLEYS THE HARDEST DESPITE THE FROPA. THUS...CARRIED MVFR
CIGS/VISB AT KAVL BUT OPTED FOR ONLY A TEMPO FOR IFR CONDITIONS
DUE TO LOW CONFIDENCE. CONDITIONS WILL IMPROVE AFTER DAYBREAK AS
HIGH PRESSURE CONTINUES TO BUILD LEADING TO THE RETURN OF VFR
AT ALL LOCATIONS ASIDE FOR KHKY WHERE LINGERING MOISTURE WILL
ALLOW FOR PERSISTENT MVFR CIGS THROUGH THE PERIOD.

OUTLOOK...ALTHOUGH THE CHANCES FOR DIURNAL CONVECTION WILL GREATLY
DIMINISH AFTER WEDNESDAY...THE POTENTIAL FOR LATE NIGHT/MORNING
FOG/STRATUS WILL PERSIST INTO LATE WEEK...ESP IN THE MTN VALLEYS.
CONDITIONS MAY FINALLY DRY OUT FOR THE WEEKEND.

CONFIDENCE TABLE...

            12-18Z        18-24Z        00-06Z        06-12Z
KCLT       MED   67%     HIGH 100%     HIGH 100%     HIGH 100%
KGSP       MED   67%     HIGH 100%     HIGH 100%     HIGH 100%
KAVL       HIGH  86%     HIGH 100%     MED   78%     HIGH  96%
KHKY       LOW   59%     HIGH 100%     HIGH 100%     HIGH  91%
KGMU       MED   79%     HIGH 100%     HIGH 100%     HIGH  95%
KAND       HIGH  82%     HIGH 100%     HIGH 100%     HIGH 100%

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...CDG
NEAR TERM...CDG
SHORT TERM...RWH
LONG TERM...RWH
AVIATION...CDG

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
ISSUED BY NATIONAL WEATHER SERVICE COLUMBIA SC
257 PM EDT TUE SEP 16 2014

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-171900-
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-
257 PM EDT TUE SEP 16 2014

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG
THE BLUE RIDGE THIS AFTERNOON BEFORE SLIDING SOUTHEAST INTO THE
SC UPSTATE...NORTHEAST GA...AND NC PIEDMONT BY EARLY EVENING.
MODEST INSTABILITY AND INCREASING SHEAR AHEAD OF AN APPROACHING
UPPER LEVEL TROUGH WILL PRESENT AN ENVIRONMENT FAVORABLE FOR A FEW
STRONG THUNDERSTORMS. THE PRIMARY THREATS WITH ANY OF THESE
THUNDERSTORMS WILL BE GUSTY WINDS AND FREQUENT CLOUD TO GROUND
LIGHTING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

..WEDNESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..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.

.SPOTTER INFORMATION STATEMENT...

NONE.

CDG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
649 PM EDT TUE SEP 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0645 PM     HAIL             2 SW SIMPSONVILLE       34.71N 82.28W
09/16/2014  E0.75 INCH       GREENVILLE         SC   TRAINED SPOTTER

            UP TO PENNY SIZED HAIL REPORTED JUST SW OF SIMPSONVILLE,
            SC.

&&

JPT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
700 PM EDT TUE SEP 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0655 PM     HAIL             FOUNTAIN INN            34.69N 82.20W
09/16/2014  E0.75 INCH       GREENVILLE         SC   CO-OP OBSERVER

            STRONG WINDS BLOWING DOWN SMALL BRANCHES ALSO

&&

LG

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
703 PM EDT TUE SEP 16 2014

NCZ036-056-057-069-071-072-162345-
CABARRUS-CATAWBA-IREDELL-LINCOLN-MECKLENBURG-ROWAN-
703 PM EDT TUE SEP 16 2014

...STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN ROWAN...NORTH
CENTRAL MECKLENBURG...NORTHEASTERN LINCOLN...SOUTHERN IREDELL...
EASTERN CATAWBA AND NORTHERN CABARRUS COUNTIES THROUGH 745 PM EDT...

AT 700 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MOORESVILLE TO
CONOVER...MOVING SOUTHEAST AT 35 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  LANDIS...
  TERRELL...
  LAKE NORMAN...
  ENOCHVILLE...
  KANNAPOLIS...
  MOUNT PLEASANT...

DIME SIZE HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS.

GUSTY WINDS CAN BLOW DOWN TREES THAT ARE DEAD...OR THAT HAVE WEAKENED
ROOT SYSTEMS. OUTDOOR FURNITURE AND SIMILAR ITEMS CAN BE TOSSED
AROUND IF NOT ANCHORED. SEEK SHELTER INDOORS.

LAT...LON 3545 8096 3577 8136 3560 8049 3538 8037
      3537 8038

ARK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
704 PM EDT TUE SEP 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0655 PM     HAIL             3 E FORK SHOALS         34.62N 82.25W
09/16/2014  E1.00 INCH       GREENVILLE         SC   PUBLIC

            1 INCH HAIL REPORTED EAST OF FORK SHOALS, SC.

&&

JPT

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
705 PM EDT TUE SEP 16 2014

NCZ037-162330-
DAVIE-
705 PM EDT TUE SEP 16 2014

...A STRONG THUNDERSTORM WILL AFFECT DAVIE COUNTY THROUGH 730 PM
EDT...

AT 700 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR ADVANCE...OR 5 MILES NORTHEAST OF
MOCKSVILLE...MOVING SOUTHEAST AT 25 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  ADVANCE...

PEA SIZE HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3588 8041 3586 8038 3584 8039 3584 8041
      3582 8047 3579 8047 3577 8045 3575 8046
      3592 8071 3593 8070 3606 8052 3600 8041
      3599 8041 3596 8037 3589 8036

ARK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
723 PM EDT TUE SEP 16 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0721 PM     HAIL             HICKORY TAVERN          34.52N 82.19W
09/16/2014  E0.25 INCH       LAURENS            SC   TRAINED SPOTTER

            PEA HAIL IN HICKORY TAVERN, SC

&&

JPT