Severe Thunderstorm Warning 293, NWS Greenville-Spartanburg, SC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
249 PM EDT SUN JUN 11 2006

.SHORT TERM /TONIGHT THROUGH WEDNESDAY/...

TONIGHT AND MONDAY...
CONVECTION DEVELOPING RAPIDLY AT MID AFTERNOON OVER THE HIGHER
TERRAIN OF NORTH CAROLINA. CORES ARE GROWING TALL QUICKLY.
ELSEWHERE...SATELLITE IMAGERY THE LAST HOUR OR TWO HAS SHOWN A
RAPID PROLIFERATION OF CUMULUS...EXCEPT FOR ACROSS OUR EASTERN
SECTIONS WHICH REMAIN CLEAR AND WHERE SURFACE AIR HAS BEEN A
LITTLE DRIER. FORECAST REASONING REALLY HAS NOT CHANGED MUCH FROM
THE PREVIOUS PACKAGE. SHORTWAVE ENERGY APPROACHING FROM THE
NORTHWEST SHOULD ALLOW FURTHER CONVECTIVE DEVELOPMENT THROUGH THE
EVENING. AT SOME POINT THIS EVENING...FRONTAL ZONE TO OUR NORTH
SHOULD ALSO BEGIN TO SAG SOUTHWARD...ASSISTING IN MOISTURE
CONVERGENCE. WE WILL FEATURE HIGHEST CHANCES OF RAIN...INTO THE
LIKELY CATEGORY...FOR THE WESTERN HALF OF OUR MOUNTAINS THROUGH
THE MORNING RUSH HOUR...AND TIER POPS DOWN TO SLIGHT CHANCE
THROUGH OVERNIGHT IN THE FAR SOUTHERN UPSTATE AND NORTHEAST
GEORGIA.

BY MONDAY MORNING...FRONT SHOULD BE APPROACHING THE SOUTH
CAROLINA/GEORGIA BORDER. WE WILL BRING SOLID CHANCES OF CONVECTION
INTO THE SOUTHERN CWFA...BUT KEEP HIGHEST CHANCES IN THE NORTH
CAROLINA PIEDMONT. FRONT EXPECTED SOUTH OF CWFA BY LATE IN THE DAY.
FORECAST SOUNDINGS UNSTABLE AGAIN...ESPECIALLY IN THE SOUTH...AND
FOR A RATHER LONG PERIOD OF TIME.

TEMPERATURES NOT LIKELY TO DROP TOO LOW OVERNIGHT...WILL FEATURE A
MILD NIGHT WITH MINS IN THE 70S ACROSS THE SOUTHERN MOST CWFA AND
THROUGH THE 60S IN THE NORTH. CLOUDS AND PRECIPITATION SHOULD KEEP
MAXES DOWN MONDAY...80S/LOWER 90S STILL IN THE SOUTH AND WITH MAXES
70S AND 80S FOR THE NORTH CAROLINA PORTION OF THE FORECAST AREA.

MONDAY NIGHT THROUGH WEDNESDAY NIGHT...
FORECAST FOR THE MONDAY NIGHT THROUGH WED NIGHT PERIOD IS
COMPLICATED BY THE TRACK THE TROPICAL CYCLONE CURRENTLY IN THE
SOUTHERN GULF OF MEXICO. THE OFFICIAL TRACK TAKES IT ACROSS CENTRAL
FL TUE MORNING. BY WED MORNING...THE CENTER IS PROJECTED TO BE A
COUPLE HUNDRED MILES EAST OF CHARLESTON. THE WRF AND NAM KEEP THE
CIRCULATION MUCH FARTHER WEST. IN FACT...I/VE HAD TO DISCARD BOTH
MODELS THIS PACKAGE DO TO THEIR EXTREME DIFFERENCES FROM THE
FORECAST TRACK. THIS LEAVES THE GFS WHICH IS FASTER THAN THE
OFFICIAL TRACK. IN FACT...THE OPERATIONAL RUN SHEARS THE SYSTEM TO
THE EXTENT THAT IS IS DIFFICULT TO IDENTIFY BEYOND TODAY.

THE EFFECT OF ALL THIS ON OUR SENSIBLE WEATHER WILL BE FOR A DRIER
FORECAST THAN IS IMPLIED BY THE NAM...AND MUCH DRIER THAN THE WRF.

I WILL MAINTAIN LOW CHANCE POPS IN THE SE ZONES MONDAY EVENING. A
COLD FRONT SHOULD MOVE THROUGH THE REGION BY MIDNIGHT AND DRY US
OUT.

TUE LOOKS DRY AND A LITTLE COOLER WITH APPRECIABLY LOWER SFC
DEWPOINTS AND 1000-850 MB THICKNESSES ON THE GFS. BY WED THE 500 MB
TROUGH WILL BE NEARLY DIRECTLY OVERHEAD...AND THE GFS BRINGS A SHORT
WAVE ACROSS THE REGION IN THE AFTERNOON. HOWEVER...THE MODEL
SOUNDINGS ARE QUITE INHIBITED...AND WILL ONLY CARRY A SLIGHT CHANCE
POP IN THE EASTERN ZONES.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
NCEP CHOOSE TO FOLLOW THE 00 UTC OPERATIONAL GFS FOR THE EXTENDED
RANGE. THIS PUTS THE FORECAST AREA ON THE BACK SIDE OF GRADUALLY
FILLING LONG WAVE TROUGH THU AND FRI. THE EASTWARD EXTENSION OF A
STRONG AND DEEP RIDGE OVER THE SRN PLANS WILL PUSH INTO THE REGION
NEXT WEEKEND. THIS CERTAINLY DOESN/T BODE WELL FOR MUCH NEEDED
RAINFALL. THERE ARE SOME LOW CHANCE POPS IN THE GRIDS FOR DAY
7...BUT IF THE PATTERN EVOLVES CONSISTENT WITH THE GFS...THE LATTER
PERIODS WILL ALMOST CERTAINLY VERIFY WARMER AND DRIER THAN WHAT WE
HAVE NOW.

&&

.AVIATION...
CHALLENGES FOR THE 18Z TAF SET REVOLVED AROUND CONVECTIVE POTENTIAL
AT ANY OF OUR SITES. EACH SITE SEEMS FAIR GAME FOR CONVECTION THE
NEXT 24 HOURS OR SO...DESPITE RELATIVELY LOW STATISICAL GUIDANCE
NUMBERS. KGSP 88-D SHOWS CONVECTION ALREADY ORGANIZING AT HIGHER
ELEVATIONS NEAR THE TENNESSEE BORDER WE START THE TAF PERIOD WITH A
VCSH AT KAVL...AND INCLUDE POSSIBLE THUNDER THERE 18 TO 21Z. FOR
NOW...KEPT KHKY AT VCSH THROUGH THE AFTERNOON BUT THAT TAF SITE
DEFINITELY A TARGET FOR AMENDMENT IN NEXT COUPLE OF HOURS AS
CONVECTIVE TRENDS MAKE THEMSELVES KNOWN. FORTUNATELY...WITH SUCH
DRIER AIR IN PLACE IN THE LOWER LEVELS...CEILINGS SHOULD REMAIN VFR
THROUGH THE BEGINNING OF THE OUTLOOK PERIOD...ALTHOUGH VISIBILITY
COULD BE LOWERED TO MVFR AT ANY OF THE TAF SITES DURING HEAVY
DOWNPOURS.

GREATEST CONVECTIVE COVERAGE SHOULD OCCUR THIS EVENING...AND THAT IS
WHEN WE TARGET ALL OUR TAF SITES FOR CONVECTION. KAVL GETS A
CATEGORICAL FOR RAIN SHOWERS THIS EVENING WITH TEMPO FOR THUNDER
FROM 01Z TO 04Z...THEN AGAIN IN THE PREDAWN WITH FRONT SAGGING SOUTH
AND BEST SHORTWAVE ENERGY PASSING. KHKY IS ALSO TARGETED FOR THE
PREDAWN HOURS...WITH KCLT INDICATED FOR THUNDER FROM 07Z THROUGH
11Z...AND AGAIN FROM 12Z TO 15Z IN TEMPO GROUPS.

THE UPSTATE TAF SITES WERE NOT INCLUDED IN A THUNDER CHANCE UNTIL
THE OUTLOOK PERIOD...AND VERY NEAR THE END OF THE OUTLOOK AT THAT.
TEMPO FOR MVFR VISIBILITY RESTRICTIONS INCLUDED AT KGSP/KGMU FROM
15Z TO 18Z ON MONDAY...AND FROM 16Z TO 18Z AT KAND.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...NONE.
SC...NONE.
&&

SHORT TERM...MCAVOY/SAB
LONG TERM...MCAVOY
AVIATION...SAB

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
604 AM EDT SUN JUN 11 2006

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-121015-
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-
604 AM EDT SUN JUN 11 2006

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED TO NUMEROUS THUNDERSTORMS...SOME OF WHICH COULD BE
SEVERE...ARE EXPECTED ACROSS THE FOOTHILLS AND PIEDMONT OF NORTH
CAROLINA THIS AFTERNOON. ISOLATED THUNDERSTORMS WILL ALSO DEVELOP
ACROSS THE NORTH CAROLINA MOUNTAINS...UPSTATE SOUTH CAROLINA DNA
NORTHEAST GEORGIA AS THE AFTERNOON PROGRESSES. PLEASE REFER TO CAESPSGSP
FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

STRONG THUNDERSTORMS ARE EXPECTED TO MOVE WEST TO EAST ACROSS THE
CAROLINAS AND NORTHEAST GEORGIA MONDAY. SOME OF THESE STORMS COULD
BECOME SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

KRENTZ

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1107 AM EDT SUN JUN 11 2006

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-112215-
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-
INCLUDING THE CITIES OF...CLAYTON...CLARKESVILLE...TOCCOA...
HARTWELL...ELBERTON...NEWLAND...STATESVILLE...MOCKSVILLE...
SPRUCE PINE...CHEROKEE...WAYNESVILLE...ASHEVILLE...HICKORY...
SALISBURY...SYLVA...FRANKLIN...BREVARD...HENDERSONVILLE...
SHELBY...LINCOLNTON...GASTONIA...CHARLOTTE...CONCORD...MONROE...
LENOIR...MORGANTON...MARION...LAKE LURE...RUTHERFORD...COLUMBUS...
GREENVILLE...SPARTANBURG...GAFFNEY...ROCK HILL...ANDERSON...
ABBEVILLE...LAURENS...UNION...CHESTER...GREENWOOD
1107 AM EDT SUN JUN 11 2006

...SEVERE WEATHER OUTLOOK...

A SURFACE COLD FRONT OVER EXTREME NORTHERN NORTH CAROLINA WILL
BEGIN TO SLIDE SOUTHWARD LATER TODAY...COINCIDENT WITH THE ARRIVAL
OF A STRONG UPPER LEVEL DISTURBANCE. GIVEN THAT SURFACE
TEMPERATURES IN THE UPPER 80S AND THROUGH THE 90S ARE EXPECTED FOR
MOST OF THE FORECAST AREA...THE ATMOSPHERE WILL BECOME VERY
UNSTABLE ONCE ALL THE MAIN INGREDIENTS ARE IN PLACE LATER TODAY.

ALTHOUGH SCATTERED THUNDERSTORMS CAN BE EXPECTED OVER THE
MOUNTAINS AND THE NORTHERN FOOTHILLS AND NORTHWEST PIEDMONT OF
NORTH CAROLINA THIS AFTERNOON...THE BEST COVERAGE OF THUNDERSTORMS...AND
BEST CHANCES OF SEVERE WEATHER...ARE NOT EXPECTED UNTIL VERY LATE
THIS AFTERNOON AND EARLY THIS EVENING.

THE MAIN SEVERE WEATHER THREAT FROM THUNDERSTORMS TODAY WILL BE
DAMAGING STRAIGHT LINE WINDS OF GREATER THAN 60 MPH...AS WELL AS
HAIL TO THE SIZE OF QUARTERS. SLIGHTLY LARGER HAIL COULD BE
REALIZED LATE THIS EVENING AS COLDER TEMPERATURES ALOFT INVADE THE
REGION.

THUNDERSTORMS WILL LIKELY LAST WELL INTO THE OVERNIGHT HOURS.

STAY TUNED TO NOAA WEATHER ALL HAZARDS RADIO...LOCAL RADIO AND
TELEVISION OR CABLE TELEVISION FOR THE LATEST WEATHER INFORMATION.

44

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
119 PM EDT SUN JUN 11 2006

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

1055 PM     HAIL             1 NW LUCIA              35.39N 81.02W
06/10/2006  E0.88 INCH       GASTON             NC   PUBLIC

            A PUBLIC REPORT OF NICKEL-SIZED HAIL THAT OCCURRED ON THE
            GASTON-LINCOLN COUNTY BORDER. ALSO HAD ENOUGH WIND TO

            BLOW DOWN SMALL LIMBS AND BLEW LAWN FURNITURE OFF A DECK.

&&

OUTLAW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
241 PM EDT SUN JUN 11 2006

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

0238 PM     HAIL             5 E ASHEVILLE           35.57N 82.46W
06/11/2006  M0.50 INCH       BUNCOMBE           NC   AMATEUR RADIO

            1/2 INCH HAIL FALLING IN EAST ASHEVILLE.

&&

44

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
322 PM EDT SUN JUN 11 2006

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

0236 PM     TSTM WND DMG     6 SE ASHEVILLE          35.51N 82.47W
06/11/2006                   BUNCOMBE           NC   COUNTY OFFICIAL

            COUNTY COMMUNICATIONS CENTER REPORTS NUMEROUS TREES DOWN
            IN THE REYNOLDS FIRE DISTRICT.

&&

OUTLAW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
326 PM EDT SUN JUN 11 2006

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

0257 PM     HAIL             10 ESE ASHEVILLE        35.52N 82.38W
06/11/2006  E0.75 INCH       BUNCOMBE           NC   CO-OP OBSERVER

            A COOP OBSERVER REPORTED THREE-QUARTER INCH DIAMETER HAIL
            FALLING ON FLAT TOP MOUNTAIN AT AN ELEVATION OF 4320 FEET
            FROM 255 TO 3 PM.

&&

OUTLAW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
339 PM EDT SUN JUN 11 2006

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

0327 PM     HAIL             8 SSW MORGANTON         35.63N 81.75W
06/11/2006  E1.00 INCH       BURKE              NC   TRAINED SPOTTER

            SPOTTER REPORTED QUARTER-SIZED HAIL. ALSO HAD LAWN
            FURNITURE SCATTERED AND A LARGE LIMB DOWN.

&&

OUTLAW