Severe Thunderstorm Warning 175, NWS Greenville-Spartanburg, SC

567 
WWUS52 KGSP 170617
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
217 AM EDT THU MAY 17 2012

SCC047-170700-
/O.CON.KGSP.SV.W.0175.000000T0000Z-120517T0700Z/
GREENWOOD SC-
217 AM EDT THU MAY 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
GREENWOOD COUNTY UNTIL 300 AM EDT...

AT 208 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...
AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
CALLISON...OR 13 MILES SOUTH OF GREENWOOD...MOVING SOUTHEAST AT 5
MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT DAMAGING WINDS...HAIL...OR FLOODING THROUGH OUR AUTOMATED
REPORTING SYSTEM...CALL TOLL FREE...1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3396 8205 3398 8205 3398 8216 3397 8217
      3397 8219 3403 8218 3409 8212 3406 8193
      3395 8202
TIME...MOT...LOC 0617Z 305DEG 4KT 3401 8210

$$

KRENTZ

546 
WWUS52 KGSP 170652
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
252 AM EDT THU MAY 17 2012

SCC047-170701-
/O.EXP.KGSP.SV.W.0175.000000T0000Z-120517T0700Z/
GREENWOOD SC-
252 AM EDT THU MAY 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENWOOD COUNTY
WILL EXPIRE AT 300 AM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LEVELS.  HOWEVER...PERIODS OF HEAVY RAIN IS STILL POSSIBLE WITH 
THUNDERSTORMS IN THE AREA.

LAT...LON 3396 8205 3398 8205 3398 8216 3397 8217
      3397 8219 3403 8218 3409 8212 3406 8193
      3395 8202
TIME...MOT...LOC 0651Z 305DEG 4KT 3399 8206

$$

KRENTZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
154 AM EDT THU MAY 17 2012

.SYNOPSIS...
A SLOW MOVING UPPER LEVEL AREA OF LOW PRESSURE WILL MOVE EAST ACROSS
THE AREA THROUGH THURSDAY. STRONG HIGH PRESSURE WILL THEN BUILD IN
FROM THE NORTH ON FRIDAY AND REMAIN THROUGH EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH TODAY/...
AS OF 145 AM...CONVECTION CONTINUES ACROSS THE SC PIEDMONT W OF I-26
INTO NE GA AND POPS WERE UPDATED TO ACCOUNT FOR THIS. CONVECTION
SHOULD TAPER OFF AFTER 3-4 AM AND AREAS OF FOG WILL DEVELOP...ESP
WHERRE THERE WAS GOOD RAIN. HELD ON TO SLIGHT CHC POPS ACROSS SE
TIER MOST OF THE NIGHT.

AS OF 1030 PM...CONVECTION DID DIMINISH IN TOTAL COVERAGE...BUT
LARGE CLUSTER REMAINED OVER THE FOOTHILLS AND FAR WESTERN PIEDMONT.
EXPECT CONVECTION TO CONTINUE TO DRIFT SOUTH AND WEST THRU THE EARLY
OVERNIGHT WITH THE BEST CHANCE OF CONVECTION ALONG AND NORTH OF
INTERSTATE 85 FROM ANDERSON TO SHELBY. STILL EXPECT CONVECTION TO
END BEFORE DAYBREAK...BUT SHOULD LINGER UNTIL AFTER MIDNIGHT.
CURRENT FORECAST LOWS STILL LOOK GOOD...BUT DEW POINTS WERE MUCH
HIGHER THAN PREV FCST. EXPECT BETTER FOG CHANCES TOWARD MORNING
GIVEN THE HIGHER DEW POINTS WITH BEST CHANCES WHERE RAIN FELL. ADDED
PATCHY FOG MOST LOCATIONS. BEST CHANCE FOR DENSE FOG WILL BE THE
SWRN NC MTN VALLEYS AND HAVE KEPT THAT MENTION AS WELL.

AS OF 750 PM...CONVECTION DIMINISHING WITH LOSS OF HEATING...BUT
WILL LINGER THRU MIDNIGHT. HAVE UPDATED POP FOR CURRENT RADAR
TRENDS. OTHERWISE...GOING FCST LOOKS GOOD...BUT DID ADD DENSE FOG
FOR THE LITTLE TN VALLEY OVERNIGHT.

PREVIOUS DISCUSSION...THE CURRENT WATER VAPOR IMAGERY AND THE LATEST
RAP RUN SHOW A WEAK H5 TROUGH ORIENTED NE TO SW ACROSS THE SRN
APPALACHIANS. UPPER DIVERGENCE ON THE EAST SIDE OF THE
TROUGH...WHICH HAS HELPED SPAWN WIDESPREAD THUNDERSTORM ACTIVITY
ALONG THE COAST...IS RESULTING IN A RAGGED BAROCLINIC LEAF BACK
ACROSS THE UPSTATE AND SRN NC PIEDMONT. THIS HAS CUT DOWN A BIT ON
THE INSOLATION ACROSS THE FA THIS AFTN. EVEN SO...ISOLATED SHRA AND
A FEW TSTMS HAVE DEVELOPED OVER THE REGION...THOUGH COVERAGE HAS
BEEN A LITTLE LESS THAN EXPECTED. THE CONVECTIVE COVERAGE IS
EXPECTED TO INCREASE SOME DURING THE LATE AFTN HOURS...THOUGH
NOTHING HIGHER THAN LOW CHANCE POPS HAS BEEN CARRIED OWING TO THE
WEAK SHEAR. WHILE THE STORMS SHOULD GO INTO THE LATE EVENING
HOURS...WE ARE NOT EXPECTING CONVECTION TO LAST AS LONG AS IT DID
LAST NIGHT. THERE IS STILL A CHANCE THAT ONE OR TWO OF THE STORMS
WILL REACH SEVERE LIMITS...PARTICULARLY ALONG AND SOUTH OF I-85
WHERE THE SHEAR IS A LITTLE STRONGER...AT LEAST UNTIL AROUND 00 UTC.

THE WEAK TROUGH WILL SETTLE ACROSS THE MIDLANDS LATE TONIGHT AND ON
THURSDAY...PUTTING THE FA UNDER NVA ALOFT. THE TROUGH PASSAGE WILL
BRING A WEAK COLD FRONT THROUGH THE AREA. THE FRONT WILL PUSH IN
FROM THE NE LATE TONIGHT...TURNING THE WINDS OUT OF THE NE AND
BRINGING MORE STABLE AIR ACROSS THE FOOTHILLS AND PIEDMONT. THE
MOUNTAINS WILL SEE LLVL MOISTURE POOLING DURING THE DAY ON THU...AND
A FEW SHRA/TSTMS ARE EXPECTED TO FIRE IN THE AFTN.

&&

.SHORT TERM /TONIGHT THROUGH SATURDAY/...
AS OF 230 PM WEDNESDAY...SHORT RANGE MODELS INDICATE THE A BROAD MID
LEVEL TROF WILL PIVOT SE ALLOWING HEIGHTS TO RISE ACROSS THE MTNS
FRIDAY AFTERNOON. NAM FORECAST SOUNDINGS INDICATE A INVERSION AROUND
H6 ALONG WITH VERY MILD MID LEVEL TEMPERATURES...THE GFS ALSO
INDICATES WARM MID LEVEL TEMPERATURES. BOTH SOLUTIONS SUPPORT
AFTERNOON CAPE VALUES BELOW 1000 J/KG WITH SHALLOW LAYER OF CIN. AT
THE SFC...HIGH PRESSURE WILL REMAIN RIDGED NE TO SE ACROSS THE CWA.
GIVEN THE RISING MID HEIGHTS...SFC RIDGING...AND WEAKLY CAPPED
POTENTIAL INSTABILITY I WILL FAVOR DRY CONDITIONS EAST OF THE MTNS.
HOWEVER...CONDITIONS MAY REMAIN LESS CAPPED ACROSS THE MTNS AND
RIDGETOP CONVECTION COULD OCCUR DURING THE LATE AFTERNOON. I WILL
PAINT SCHC POPS ACROSS THE MTN RIDGES. TEMPERATURES SHOULD RANGE
VERY CLOSE TO NORMAL VALUES...MINS NEAR 60 WITH HIGHS NEAR 80.

ON SATURDAY...MID LEVEL HEIGHT VALUES WILL CONTINUE TO SLOWLY RISE
THROUGH THE AFTERNOON. SFC HIGH PRESSURE WILL REMAIN RIDGE SE ACROSS
THE CWA...SUPPLYING A STEADY LLVL NE WIND. THE NE FLOW RESULTS IN
LOWER LLVL DEWPOINTS AND OVERALL DRIER MOISTURE PROFILE. FORECAST
SOUNDINGS INDICATE LITTLE TO NO INSTABILITY ACROSS THE FORECAST
AREA. THE CHCS FOR DEEP CONVECTION APPEARS MINIMAL AND POPS WILL
REMAIN AROUND 10 PERCENT. TEMPERATURES MAY VERIFY WITHIN A DEGREE
ONE TO TWO DEGREES WARMER THAN FRIDAY.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
AS OF NOON WEDNESDAY...A COMPLICATED MID LEVEL PATTERN WILL REMAIN
ACROSS THE SOUTHEAST REGION THROUGH THE EXTENDED PERIOD. IT APPEARS
THAT A BROAD CLOSED LOW WILL REMAIN OVER THE REGION ON SUNDAY...THIS
LOW MAY PHASE WITH AN APPROACHING TROF ON TUESDAY AND WEDNESDAY. THE
TIMING AND PLACEMENT OF THE MAIN FEATURES IS UNCERTAIN. BASED ON
NATIONAL GUIDANCE AND FORECAST CONSISTENCY I WILL ADVERTISE A
GRADUALLY INCREASE IN POPS AND SKY COVER FROM EAST TO WEST SUNDAY
AND MONDAY...THEN KEEP CHCS AND ABUNDANT SKY COVER FOR TUES AND
WEDS. TEMPERATURES SUNDAY THROUGH WEDNESDAY ARE EXPECTED TO RANGE
AROUND NORMAL VALUES.

&&

.AVIATION /06Z THURSDAY THROUGH MONDAY/...
AT KCLT...A SLIGHT CHC OF MAINLY A SHWR AT THE FIELD WILL LINGER
OVERNIGHT...AN ISOLD TSTM BECOMES LESS PSBL WITH COOLING. OTHERWISE
SCT LOW CLOUDS AND BKN CIRRUS WITH MVFR FOG AROUND DAYBREAK. THERE
IS A SLIGHT CHC OF TSTMS THU AFTN. LGT OVERNIGHT WINDS WILL PICK UP
FROM THE NE AT 10KT IN THE AFTN.

ELSEWHERE...THE CHC OF SHWRS/TSTMS WILL LINGER FOR A COUPLE HOURS
ACROSS THE SC PIEDMONT...THEN DROP TO SLIGHT CHC MAINLY SHWRS
OVERNIGHT. EXPECT AT LEAST MVFR FOG ALL TERMINALS AROUND DAYBREAK...
IFR AT KHKY WHERE THERE WAS RAIN...ALSO KAND. LGT WINDS OVERNIGHT
WILL INCREASE FROM THE E AY 10KT...SE AT KAVL...THU AFTN.

OUTLOOK...EXPECT ISOLD LATE DAY SHOWERS AND TSTMS FRI...ESP MTNS.
THEN DRYING OVER THE WEEKEND. MRNG FOG WILL BE PSBL...ESP MTN
VALLEYS AND NEAR LAKES/RIVERS.

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...RB/RWH
SHORT TERM...NED
LONG TERM...NED
AVIATION...RB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
310 PM EDT WED MAY 16 2012

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-171915-
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-
310 PM EDT WED MAY 16 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOP
THROUGH THE REST OF THE AFTERNOON AS THE ATMOSPHERE REMAINS
UNSTABLE AHEAD OF A WEAK COLD FRONT. A FEW OF THESE STORMS COULD
BECOME STRONG ENOUGH TO PRODUCE LARGE HAIL AND DAMAGING
WINDS...ESPECIALLY ALONG AND SOUTH OF INTERSTATE 85. THUNDERSTORMS
WILL BE SLOW MOVING OR STATIONARY THIS AFTERNOON...AND A FEW
LOCATIONS COULD SEE 1 TO 2 INCHES OR RAIN IN A SHORT PERIOD OF
TIME.

.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.

NED

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1134 PM EDT WED MAY 16 2012

SCZ006-012-170415-
GREATER GREENVILLE-LAURENS-
1134 PM EDT WED MAY 16 2012

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN LAURENS AND
SOUTHEASTERN GREENVILLE COUNTIES THROUGH 1215 AM EDT...

AT 1131 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES EAST OF FOUNTAIN INN...OR 16 MILES
NORTHWEST OF LAURENS...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  GRAY COURT...

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

LAT...LON 3446 8230 3469 8234 3481 8217 3475 8211
      3474 8208 3469 8205 3466 8200 3465 8195
      3460 8190 3443 8227

ARK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1148 PM EDT WED MAY 16 2012

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

1046 PM     HAIL             3 NE CLEMSON            34.71N 82.78W
05/16/2012  E0.88 INCH       PICKENS            SC   PUBLIC

            NICKEL SIZED HAIL NE OF CLEMSON.

&&

JPT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1158 PM EDT WED MAY 16 2012

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

1142 PM     HAIL             3 S FOUNTAIN INN        34.65N 82.20W
05/16/2012  E1.25 INCH       LAURENS            SC   PUBLIC

            1.25 INCH HAIL IN FOUNTAIN INN.

&&

JPT

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1223 AM EDT THU MAY 17 2012

SCZ006-010-170515-
ANDERSON-GREATER GREENVILLE-
1223 AM EDT THU MAY 17 2012

...A STRONG THUNDERSTORM WILL AFFECT EASTERN ANDERSON AND SOUTHERN
GREENVILLE COUNTIES THROUGH 115 AM EDT...

AT 1220 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR BELTON...OR 8 MILES EAST OF ANDERSON...
MOVING NORTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  WILLIAMSTON...

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

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3460 8264 3476 8231 3452 8226 3448 8232
      3444 8256

ARK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
116 AM EDT THU MAY 17 2012

SCZ006-010>012-170600-
ABBEVILLE-ANDERSON-GREATER GREENVILLE-LAURENS-
116 AM EDT THU MAY 17 2012

...A STRONG THUNDERSTORM WILL AFFECT EASTERN ANDERSON...NORTHEASTERN
ABBEVILLE...SOUTHEASTERN GREENVILLE AND WESTERN LAURENS COUNTIES
THROUGH 200 AM EDT...

AT 112 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES WEST OF PRINCETON...OR 17 MILES EAST OF
ANDERSON...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  HONEA PATH...
  BOYD MILL POND...

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

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3445 8247 3455 8245 3464 8234 3452 8204
      3439 8222 3441 8224 3440 8226 3434 8233
      3432 8231 3431 8233

KRENTZ

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
138 AM EDT THU MAY 17 2012

SCZ019-170630-
GREENWOOD-
138 AM EDT THU MAY 17 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN GREENWOOD COUNTY
THROUGH 230 AM EDT...

AT 136 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHEAST OF VERDERY...OR 9 MILES SOUTH
OF GREENWOOD...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  CALLISON...

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

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3398 8205 3397 8219 3401 8224 3399 8228
      3404 8233 3406 8233 3411 8227 3416 8224
      3419 8220 3403 8195 3398 8199 3395 8202
      3395 8204

KRENTZ