Severe Thunderstorm Warning 104, NWS Greenville-Spartanburg, SC

156 
WWUS52 KGSP 271559
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1159 AM EDT WED APR 27 2011

NCC045-SCC021-091-271609-
/O.CAN.KGSP.SV.W.0104.000000T0000Z-110427T1630Z/
CLEVELAND NC-CHEROKEE SC-YORK SC-
1159 AM EDT WED APR 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN YORK...
NORTHEASTERN CHEROKEE AND SOUTHEASTERN CLEVELAND COUNTIES IS
CANCELLED...

LAT...LON 3535 8085 3515 8115 3516 8132 3518 8133
      3523 8132 3549 8099 3536 8084
TIME...MOT...LOC 1559Z 234DEG 36KT 3518 8120

$$

NCC071-109-119-271630-
/O.CON.KGSP.SV.W.0104.000000T0000Z-110427T1630Z/
GASTON NC-LINCOLN NC-MECKLENBURG NC-
1159 AM EDT WED APR 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT
FOR WEST CENTRAL MECKLENBURG...SOUTHEASTERN LINCOLN AND GASTON
COUNTIES...

AT 1156 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR CROWDERS...OR 7 MILES SOUTHWEST OF GASTONIA...MOVING
NORTHEAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DALLAS...RANLO...CRAMERTON...LOWELL...MCADENVILLE...BELMONT...
STANLEY...MOUNT HOLLY...LUCIA...MOUNTAIN ISLAND LAKE AND LOWESVILLE

LAT...LON 3535 8085 3515 8115 3516 8132 3518 8133
      3523 8132 3549 8099 3536 8084
TIME...MOT...LOC 1559Z 234DEG 36KT 3518 8120

$$

RB

100 
WWUS52 KGSP 271625
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1225 PM EDT WED APR 27 2011

NCC071-109-119-271634-
/O.EXP.KGSP.SV.W.0104.000000T0000Z-110427T1630Z/
GASTON NC-LINCOLN NC-MECKLENBURG NC-
1225 PM EDT WED APR 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MECKLENBURG...
SOUTHEASTERN LINCOLN AND GASTON COUNTIES WILL EXPIRE AT 1230 PM
EDT...

THE STORM HAS WEAKENED BELOW SEVERE LEVELS SO THE WARNING WILL BE 
ALLOWED TO EXPIRE.

LAT...LON 3535 8085 3515 8115 3516 8132 3518 8133
      3523 8132 3549 8099 3536 8084
TIME...MOT...LOC 1624Z 231DEG 33KT 3532 8102

$$

RB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1123 AM EDT WED APR 27 2011

.SYNOPSIS...
LOW PRESSURE WILL MOVE FROM THE MISSISSIPPI RIVER VALLEY TO THE
GREAT LAKES TODAY THROUGH TONIGHT...DRAGGING A COLD FRONT TOWARD THE
THE SOUTHERN APPALACHIANS. THE FRONT WILL CROSS THE WESTERN
CAROLINAS AND NORTHEAST GEORGIA THURSDAY MORNING. HIGH PRESSURE WILL
RETURN FRIDAY THROUGH SUNDAY...WITH ANOTHER COLD FRONT ARRIVING FROM
THE NORTHWEST EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
AT 1120 AM...LATEST W/V IMAGES INDICATE A S/W...ASSOCIATED WITH AN OLD
CONVECTIVE LINE...CROSSING THE WESTERN CAROLINAS. THE WAVE WILL
CONTINUE TO DRIFT EAST THIS MORNING AND EARLY AFTERNOON. RADAR
REFLECTIVITY INDICATES THAT MULTIPLE LINES OF HEAVY SHRA AND ISO
TSRA HAS DEVELOPED AHEAD OF THE WAVE. COVERAGE SHOULD CONTINUE TO
INCREASE HAS THE MID LEVEL DISTURBANCE TRACKS EAST. INSTABILITY WILL
REMAIN MARGINAL FOR SVR TSRA THROUGH THE EARLY
AFTERNOON...ESPECIALLY WITH THE FREEZING LEVEL OVER 13.5 KFT.

LATER THIS AFTERNOON...SBCAPE VALUES WILL LIKELY RANGE AROUND 1500
J/KG. FORECAST SOUNDINGS INDICATE THAT A LONG AND CURVED HODOGRAPHS
WILL DEVELOP THIS AFTERNOON...HELICITY VALUES BETWEEN 0-3KM BETWEEN
200 TO 300. TRIGGER FOR AFTERNOON STORMS SHOULD REMAIN TIED TO COOL
POOL BOUNDARIES AND ADDITIONAL S/W. I WILL FORECAST LIKELY TO HIGH
CHC COVERAGE. THESE STORMS WILL LIKELY HAVE GREATER POTENTIAL FOR
SVR WEATHER. ESPECIALLY...IT STORMS DEVELOP INTO WELL ORGANIZED
MULTICELL OR SUPERCELLS.

THIS EVENING AND OVERNIGHT CONTINUES TO LOOK FAVORABLE FOR THE
PASSAGE OF VERY STRONG TO SEVERE TSRA. SFC LOW PRESSURE WILL TRACK
NORTHEAST ACROSS THE OHIO RIVER VALLEY. THE COLD FRONT ASSOCIATED
WITH THE LOW WILL SWING ACROSS THE SOUTHERN APPALACHIAN REGION LATE
THIS EVENING...PUSHING EAST OF THE MTNS EARLY THURSDAY MORNING...AND
EAST OF THE CWA AROUND SUNRISE. THE ENVIRONMENT AHEAD OF THE COLD
FRONT WILL FEATURE VERY STRONG LLVL VEERING WIND PROFILES. IN
FACT...WINDS AROUND 2 KFT MAY EXCEED 50 KTS AS EARLY AS 3Z AND
CONTINUE UNTIL 9Z. HELICITY WILL LIKELY PEAK MORE THAN 400 M2/S2
AHEAD OF THE LINE...WITH SWEAT VALUES BETWEEN 400-450. CAPE VALUES
WILL RANGE BETWEEN 1000 TO 2000 J/KG. THIS ENVIRONMENT WILL CERTAIN
SUPPORT THE FORMATION OF A SQUALL LINE...PRODUCING DAMAGING
WINDS...LARGE HAIL...AND POSSIBLY TORNADOES. IT IS INTERESTING TO SEE THE
HIGH RESOLUTION MESOSCALE MODELS DEVELOP DISCRETE SUPERCELLS ALONG
AND AHEAD OF THE SQUALL. IF THE SUPERCELLS DEVELOP...THEN THE
POTENTIAL OF TORNADOES WILL INCREASE. CURRENT THE AXIS OF THE SQUALL
IS EXPECTED TO CROSS THE SOUTHERN APPALACHIANS LATE THIS EVENING
THROUGH MIDNIGHT...ACROSS THE FOOTHILLS DURING THE EARLY MORNING
HOURS...THEN THE PIEDMONT BETWEEN THE LATE NIGHT HOURS UNTIL THE PRE
DAWN HOURS.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
AS OF 300 AM WEDNESDAY...THE PASSING COLD FRONT SHOULD MOVE EAST OF
THE FORECAST AREA THURSDAY MORNING...ALLOWING SHOWERS AND
THUNDERSTORMS TO END FROM THE WEST. MAX TEMPS WILL RUN A FEW DEGREES
BELOW NORMAL THU AFTN AS COLD ADVECTION BEGINS...BUT WITH TEMPS A
LITTLE ABOVE NORMAL IN PIEDMONT SECTIONS. THE MAIN UPPER TROUGH
ASSOCIATED WITH THE DEEP UPPER SYSTEM TO THE NORTH WILL FINALLY
CROSS THE REGION FRIDAY MORNING...BUT WITH FAIRLY DRY PROFILES. WILL
JUST ADVERTISE A BIT MORE CLOUDINESS ACROSS THE NRN TIER WITH THE
WAVE PASSAGE...AS WELL AS BREEZY TO WINDY CONDITIONS EARLY FRIDAY.
MAX TEMPS SHOULD BE NEAR NORMAL FRIDAY AFTN AS HIGH PRESSURE BUILDS
IN FROM THE WEST. TEMPS THEN COOL A BIT BELOW NORMAL FRIDAY NIGHT
WITH GOOD RADIATING CONDITIONS.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
AS OF 3 AM WEDNESDAY...HIGH PRES WILL LINGER ACROSS THE REGION ON
SATURDAY BEFORE MOVING OFF THE EAST COAST ON SUNDAY...WITH RETURN
FLOW SETTING BACK UP. MAX TEMPS WILL REBOUND TO 5 TO 10 DEGREES
ABOVE NORMAL OVER THE WEEKEND. A COLD FRONT WILL SLOWLY APPROACH
FROM THE NORTHWEST DURING THE EARLY PART OF NEXT WEEK. TAKING A
BLEND OF MODEL GUIDANCE SUGGESTS THAT THE BEST CHANCE OF SHOWERS AND
THUNDERSTORMS WILL BE WITH FROPA MONDAY NIGHT THROUGH TUESDAY. SHEAR
AND INSTABILITY PROFILES DO NOT LOOK TOO IMPRESSIVE FOR THE EARLY
WEEK SYSTEM.

&&

.AVIATION /16Z WEDNESDAY THROUGH SUNDAY/...
AT KCLT...LMVFR CIGS SLATED TO IMPROVE TO VFR BY MIDDAY AND SOUTH
WINDS TO BECOME INCREASINGLY GUSTY THRU THE AFTERNOON. WITHIN THE
MOIST AND MODERATELY UNSTABLE AIRMASS...THERE WILL BE THE POSSIBILITY
OF A TSTM AFFECTING THE TERMINAL AT SOME POINT THIS AFTERNOON AND/OR
EVENING. STRONGER DEEP CONVECTIVE LINE PRECEDING COLD FRONT MAY
ENCROACH UPON THE REGION SOMETIME OVERNIGHT.

ELSEWHERE ACRS THE FA...LIMITED LINGERING UPSLOPE SHOWERS WILL BE
SEEN THIS MORNING...PROBABLY NOT AFFECTING KAVL NOR KHKY. AREAS OF
MVFR/IFR CIGS TO IMPROVE BY MIDDAY AND GUSTY SOUTHERLY WINDS WILL
DEVELOP. SCATTERED TSTMS ARE ALSO EXPECTED TO DEVELOP THIS AFTERNOON
AND EVENTUALLY GIVE WAY TO AN ORGANIZED LINE OF STORMS ENCROACHING
FROM THE WEST LATER THIS EVENING.

OUTLOOK...SHOWER CHANCES DIMINISH QUICKLY THURSDAY MORNING AND
GUSTY POST FRONTAL WESTERLY WINDS WILL DEVELOP. QUIET WX IS EXPECTED
FRIDAY THRU SUNDAY.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...LAKE WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR GAZ010-017-
     018-026-028-029.
NC...LAKE WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR NCZ033-
     035>037-048>053-056>059-062>065-068>072-082-501>510.
SC...LAKE WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR SCZ001>014-
     019.

&&

SYNOPSIS...HG
NEAR TERM...NED
SHORT TERM...HG
LONG TERM...HG
AVIATION...CSH

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
501 AM EDT WED APR 27 2011

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-280915-
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-
501 AM EDT WED APR 27 2011

...LAKE WIND ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT
THIS EVENING...

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

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE WIND ADVISORY.

THUNDERSTORMS WILL GRADUALLY INCREASE IN COVERAGE ACROSS THE
WESTERN CAROLINAS AND NORTHEAST GEORGIA TODAY...ESPECIALLY THIS
AFTERNOON AND EVENING. AS THE ATMOSPHERE BECOMES MORE UNSTABLE
THROUGH THE DAY...THE THUNDERSTORMS WILL GAIN THE POTENTIAL TO
PRODUCE LARGE HAIL...DAMAGING WIND GUSTS...AND LOCALLY VERY HEAVY
RAINFALL.

A MORE SOLID LINE OF THUNDERSTORMS WILL DEVELOP FROM CENTRAL
TENNESSEE THROUGH THE DEEP SOUTH TODAY AND MOVE EASTWARD ACROSS
THE FORECAST AREA LATE THIS EVENING THROUGH THE OVERNIGHT HOURS.
IT IS LIKELY THAT SEVERE...DAMAGING WINDS WILL ACCOMPANY THIS
LINE AS IT MOVES INTO THE REGION. SOME OF THE THUNDERSTORMS ALONG
THE LINE COULD PRODUCE LARGE HAIL AS WELL...AND ISOLATED TORNADOES
WILL BE POSSIBLE.

KEEP ABREAST OF THE LATEST WEATHER CONDITIONS THROUGHOUT TODAY AND
TONIGHT. SEVERE THUNDERSTORM OR TORNADO WATCHES ARE VERY LIKELY
FOR PART OR ALL OF THE AREA LATE TODAY THROUGH TONIGHT. MAKE PLANS
NOW FOR WHERE YOU WILL TAKE SHELTER WHEN THE THUNDERSTORMS ARRIVE.
KEEP AN ALERTING NOAA WEATHER RADIO NEARBY IN CASE WARNINGS ARE
ISSUED WHILE YOU ARE SLEEPING TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF LARGE
HAIL...DAMAGING WINDS...TORNADOES OR FLASH FLOODING TO OUR OFFICE.

GERAPETRITIS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1119 AM EDT WED APR 27 2011

SCZ008-009-013-271545-
CHEROKEE-UNION-YORK-
1119 AM EDT WED APR 27 2011

...A STRONG THUNDERSTORM WILL AFFECT CHEROKEE...NORTHERN UNION AND
NORTHWESTERN YORK COUNTIES THROUGH 1145 AM EDT...

AT 1114 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES WEST OF SARATT...OR 11 MILES SOUTH OF
GAFFNEY...MOVING NORTHEAST AT 30 MPH.

THIS STORM WILL BE NEAR...
  HICKORY GROVE...
  BLACKSBURG...

PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3482 8161 3490 8172 3491 8171 3493 8176
      3494 8176 3518 8152 3517 8143 3508 8128

RB