Severe Thunderstorm Warning 21, NWS Greenville-Spartanburg, SC

000 
WWUS52 KGSP 040454
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1254 AM EDT WED APR 4 2007

NCC011-040515-
/O.CON.KGSP.SV.W.0021.000000T0000Z-070404T0515Z/
AVERY NC-
1254 AM EDT WED APR 4 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM EDT 
FOR AVERY COUNTY...

AT 1252 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM BANNER ELK TO 5 MILES SOUTH OF CROSSNORE...OR ALONG A
LINE EXTENDING FROM BEECH MOUNTAIN TO 8 MILES EAST OF SPRUCE PINE...
MOVING EAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUGAR
MOUNTAIN AND GRANDFATHER MOUNTAIN

PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT FOR LARGE HAIL AND
DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR
WITH ANY THUNDERSTORM. SEEK SHELTER INDOORS AWAY FROM WINDOWS AND
DOORS UNTIL THE STORM PASSES.

LAT...LON 3625 8191 3610 8198 3591 8200 3596 8184
      3606 8175

$$

MOORE

000 
WWUS52 KGSP 040512
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
112 AM EDT WED APR 4 2007

NCC011-040522-
/O.EXP.KGSP.SV.W.0021.000000T0000Z-070404T0515Z/
AVERY NC-
112 AM EDT WED APR 4 2007

...THE SEVERE THUNDERSTORM WARNING FOR AVERY COUNTY EXPIRES AT 115 AM
EDT...

THE LINE OF STORMS HAS WEAKENED CONSIDERABLY...SO THE WARNING WILL 
BE ALLOWED TO EXPIRE AT 115 AM.

LAT...LON 3625 8191 3610 8198 3591 8200 3596 8184
      3606 8175

$$

MOORE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1134 PM EDT TUE APR 3 2007

.SHORT TERM /REST OF TONIGHT/...
A QUICK UPDATE TO INCLUDE AVERY COUNTY IN THE SEVERE THUNDERSTORM
WATCH...WHICH WAS AN OVERSIGHT WHEN THE WATCH WAS INITIALLY
ISSUED. WILL TAKE THIS OPPORTUNITY TO RAISE THE POP ACROSS THE NC
FOOTHILLS AS WELL...BUT STILL THINK THE MCS WILL WEAKEN AS IT
MOVES ACROSS THE MTNS GIVEN THE LACK OF SFC BASED INSTABILITY FROM
KAVL TO KHKY.

&&

.PREV DISCUSSION...
/ISSUED 1013 PM EDT TUE APR 3 2007/

SHORT TERM /REST OF TONIGHT/...
HAVE BEEN WATCHING UPSTREAM RADAR TRENDS WITH MUCH INTEREST THIS
EVENING AND AGREE WITH SPC THAT STORMS SHOULD PROBABLY RUN INTO
THE NC MTNS ON MOMENTUM ALONE. THE NC MTN ZONES HAVE BEEN PUT IN A
NEW SVR TSTM WATCH 118 UNTIL 07Z AND THIS LOOKS LIKE A REALLY GOOD
IDEA. WHETHER OR NOT ANY OF THE STORMS CAN MAKE IT OVER THE MTNS
IS ALWAYS PROBLEMATIC. IN THIS CASE...MOST RECENT SFC OBS AT 02Z
CONTINUE TO SHOW POOL OF LOW DEWPOINTS FROM KAVL TO KHKY ALTHOUGH
LOW LEVEL MOISTURE IS TRYING TO MOVE N ACROSS THE WESTERN UPSTATE.
PRESENT THINKING IS THAT SEVERE CONVECTION WILL PROBABLY NOT MAKE
IT OVER THE MTNS INTO UPSTATE SC BUT THIS WILL CERTAINLY NEED TO
BE WATCHED.

FOR THE UPDATE...HAVE BUMPED AREAS IN WATCH INTO THE CATEGORICAL
RANGE BUT AM HESITANT TO RAISE POP E OF MTNS JUST YET...SO THIS
WILL BE REEVALUATED AROUND MIDNIGHT. INCREASING CLOUDS WILL KEEP
TEMPS UP...AND SINCE SFC TEMPS ARE ALREADY RUNNING WARMER THAN
EXPECTED...A MINOR UPWARD ADJUSTMENT TO THE MIN TEMP WAS MADE.

PREV DISCUSSION...
/ISSUED 625 PM EDT TUE APR 3 2007/

SHORT TERM /REST OF TONIGHT/...
STORMS MOVING ACROSS N GA ARE WEAKENING AT THIS TIME BUT APPEAR TO
NOT WANT TO GIVE UP AS THEY MOVE INTO INCREASINGLY UNFAVORABLE
LACK OF INSTABILITY DUE TO DRY SURFACE AIR. WILL QUICKLY AMEND THE
PUBLIC ZONES OVER EXTREME NE GA/WRN SC TO ACCOUNT FOR THE STORMS
MOVING IN AS THEY CONTINUE TO WEAKEN. OTHERWISE...THE REST OF THE
ZONES SHOULD STAY THE SAME.

PREV DISCUSSION...
/ISSUED 233 PM EDT TUE APR 3 2007/

SHORT TERM /TONIGHT THROUGH FRIDAY/...
A CLOSED UPPER LOW WILL MOVE EAST ACROSS THE GREAT LAKES TONIGHT AND
WEDNESDAY. A SURFACE COLD FRONT WILL MOVE FROM THE MS RIVER VALLEY
TO THE SOUTHERN APPALACHIANS TONIGHT...BUT WITH GULF INFLOW VERY
LIMITED...LIKELY POPS WILL ONLY BE CARRIED ON THE TN BORDER...WITH
CHANCE TO THE EAST...MAINLY TOWARDS DAWN...WITH INSTABILITY
SUPPORTING AT LEAST A SLIGHT CHANCE OF THUNDER THROUGH THE NIGHT.
WARM ADVECTION IN A TIGHTENING GRADIENT AND INCREASING CLOUDS WILL
KEEP MINIMUM TEMPERATURES QUITE ELEVATED FOR THIS TIME OF YEAR.
WINDS ARE EXPECTED TO REACH LAKE WIND ADVISORY CRITERIA IN THE NC
MOUNTAINS TONIGHT.

A RAPID FRONTAL PASSAGE WILL OCCUR JUST AFTER SUNRISE..WITH RAPID
CLEARING THEREAFTER. SOME LOW CLOUDS AND ISOLATED SHOWERS MAY LINGER
IN THE NORTHERN NC MOUNTAINS FOR A FEW HOURS. GUSTY WEST TO
NORTHWEST WINDS WILL LIKELY SUPPORT A LAKE WIND ADVISORY WEDNESDAY
IN PORTION OF WESTERN NORTH CAROLINA. DOWNSLOPE FLOW WILL ALLOW
MAXIMUM TEMPERATURES TO REACH WELL ABOVE NORMAL IN THE LEE OF THE
MOUNTAINS...WHILE COLD ADVECTION WILL LIMIT WARMING AND CAUSE
TEMPERATURES TO FALL THROUGH THE DAY IN THE MOUNTAINS.

DEEP LOW PRES WILL SPREAD EAST INTO NEW ENGLAND THU TO
FRI...KEEPING A BELT OF STRONG MID LEVEL WINDS ACROSS THE FORECAST
AREA. GUSTY CONDITIONS ARE EXPECTED DURING THE PEAK OF MIXING EACH
DAY. A SERIES OF CLIPPER TYPE WAVES WILL SWING THROUGH THE
FORECAST AREA...THE MOST PROMINENT OF WHICH SHOULD ARRIVE LATE
FRIDAY. THE MODELS CONTINUE TO BACK OFF NORTHWEST FLOW MOISTURE IN
THE COLD AIR FOR LATE WED NIGHT...AND ANY FLURRIES OR ISOLATED
LIGHT SNOW SHOWERS SHOULD PRESENT NO PROBLEMS. SLIGHT RAIN
SHOWER/SNOW SHOWER CHANCES WILL BE ADVERTISED IN THE NRN MTNS LATE
FRIDAY WITH THE ARRIVAL OF THE SHORTWAVE.

FROST/FREEZE CONCERNS WILL CONTINUE TO BE ADDRESSED IN THE
HWO...WITH WATCHES...WARNINGS OR ADVISORIES LIKELY STARTING
TOMORROW AS THE RECORD SETTING COLD AIRMASS SETTLES IN.

LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
THE DEEP VORTEX OVER NEW ENGLAND WILL KEEP A TIGHT HEIGHT/PRES
GRADIENT ACROSS THE WESTERN CAROLINAS AND NORTHEAST GEORGIA
THROUGH THE WEEKEND. BREEZY TO WINDY CONDITIONS WILL LIKELY
RESULT...ESPECIALLY DURING PEAK MIXING EACH AFTERNOON. SEVERAL
WAVES WILL ROTATE THROUGH THE REGION. THE GFS FEATURES THE BEST
WAVE SUNDAY NIGHT TO MONDAY...BUT THIS WAVE IS GREATLY DAMPENED ON
THE FAVORED ECM. THE CONTINUED COLD TEMPERATURES WILL BE THE MAIN
STORY IN THE MEDIUM RANGE...AS PRECIPITATION CHANCES REMAIN FAIRLY
LOW WITH DEEPER MOISTURE NORTH OF THE REGION NEAR THE CYCLONE AND
ALSO PUSHED SOUTH OF THE AREA TOWARD THE GULF COAST.

AVIATION /19Z-18Z/...
SATELLITE IMAGERY SHOWS CUMULUS FIELDS DOMINATING THE MOUNTAINS AND
PIEDMONT...WITH CIRRUS THE MAIN CLOUD DECK IN THE FOOTHILLS. LOW
LEVEL MOISTURE SHOULD ALLOW CUMULUS TO FILL IN OVER THE FOOTHILLS
THIS AFTERNOON...BUT MORE BREAKS ARE EXPECTED...KEEPING CEILING
RATHER HIGH. LOW LEVEL MOISTURE WILL INCREASE OVERNIGHT AHEAD OF AN
APPROACHING FRONT...CREATING LOW VFR CEILING EAST OF THE MOUNTAINS AND
MVFR IN THE MOUNTAINS. ONLY SCATTERED PRECIPITATION IS EXPECTED
TONIGHT...SO NONE WAS CARRIED AT ANY TAF SITE. THERE SHOULD BE
JUST ENOUGH WIND TO PREVENT VISIBILITY RESTRICTIONS... EXCEPT AT
SITES THAT DO RECEIVE PRECIPITATION. THE MAIN WINDOW FOR SHOWERS
AND THUNDERSTORMS IS 09Z TO 14Z. SHORTLY THEREAFTER WINDS VEER TO
THE WEST NORTHWEST AND BECOME RATHER GUSTY...WHILE CEILINGS ERODE.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...LAKE WIND ADVISORY UNTIL 6 AM EDT WEDNESDAY FOR NCZ033-048>053-
     058-059-062>065-501-503-505-507-509.

SC...NONE.
&&

SHORT TERM...MOORE

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1139 PM EDT TUE APR 3 2007

NCZ033-048>053-058-059-062>065-509-050345-
AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM-
NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-
POLK MOUNTAINS-
1139 PM EDT TUE APR 3 2007

...SEVERE THUNDERSTORM WATCH 118 IN EFFECT UNTIL 3 AM EDT
WEDNESDAY...
...LAKE WIND ADVISORY IN EFFECT UNTIL 6 AM EDT WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT

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

   SEVERE THUNDERSTORM WATCH
   LAKE WIND ADVISORY

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A VERY COLD AIRMASS WILL MOVE INTO THE REGION BEHIND THE COLD
FRONT ON WEDNESDAY. OVERNIGHT MINIMUM TEMPERATURES IN THE TEENS
AND 20S WILL BE POSSIBLE FROM WEDNESDAY NIGHT TO SUNDAY NIGHT
ACROSS THE NORTH CAROLINA MOUNTAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

NCZ501-503-505-507-050345-
CALDWELL MOUNTAINS-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-
RUTHERFORD MOUNTAINS-
1139 PM EDT TUE APR 3 2007

...LAKE WIND ADVISORY IN EFFECT UNTIL 6 AM EDT WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...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 ARE POSSIBLE DURING THE EARLY MORNING HOURS ON
WEDNESDAY AS A COLD FRONT MOVES INTO THE REGION. THERE IS THE
POSSIBILITY THAT ONE OR TWO STORMS COULD PRODUCE STRONG WIND GUSTS
CAPABLE OF KNOCKING DOWN TREE LIMBS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A VERY COLD AIRMASS WILL MOVE INTO THE REGION BEHIND THE COLD
FRONT ON WEDNESDAY. OVERNIGHT MINIMUM TEMPERATURES IN THE TEENS
AND 20S WILL BE POSSIBLE FROM WEDNESDAY NIGHT TO SUNDAY NIGHT
ACROSS THE NORTH CAROLINA MOUNTAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

GAZ010-050345-
RABUN-
1139 PM EDT TUE APR 3 2007

...SEVERE THUNDERSTORM WATCH 118 IN EFFECT UNTIL 3 AM EDT
WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA.

.DAY ONE...TONIGHT

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

   SEVERE THUNDERSTORM WATCH

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A VERY COLD AIRMASS WILL MOVE INTO THE REGION STARTING ON
WEDNESDAY AS A STRONG COLD FRONT CROSSES THE AREA. OVERNIGHT
MINIMUM TEMPERATURES BELOW FREEZING WILL BE POSSIBLE FROM
WEDNESDAY NIGHT TO SUNDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

GAZ017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-
508-SCZ001>014-019-050345-
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-
OCONEE MOUNTAINS-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-
GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-
CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
1139 PM EDT TUE APR 3 2007

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

.DAY ONE...TONIGHT

THUNDERSTORMS ARE POSSIBLE DURING THE EARLY MORNING HOURS ON
WEDNESDAY AS A COLD FRONT MOVES INTO THE REGION. THERE IS THE
POSSIBILITY THAT ONE OR TWO STORMS COULD PRODUCE STRONG WIND GUSTS
CAPABLE OF KNOCKING DOWN TREE LIMBS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A VERY COLD AIRMASS WILL MOVE INTO THE AREA STARTING
WEDNESDAY...WITH TEMPERATURES POSSIBLY FALLING BELOW THE FREEZING
MARK FROM THURSDAY NIGHT TO SUNDAY NIGHT. FREEZE WATCHES OR
WARNINGS...AS WELL AS FROST ADVISORIES...COULD BE POSTED AT ANY
TIME FOR THIS PERIOD. PLAN AHEAD NOW TO TAKE STEPS TO PROTECT
TENDER VEGETATION LATER THIS WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MIGHT BE NEEDED EARLY WEDNESDAY.

NCZ510-050345-
EASTERN POLK-
1139 PM EDT TUE APR 3 2007

...SEVERE THUNDERSTORM WATCH 118 IN EFFECT UNTIL 3 AM EDT
WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT

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

   SEVERE THUNDERSTORM WATCH

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A VERY COLD AIRMASS WILL MOVE INTO THE AREA STARTING
WEDNESDAY...WITH TEMPERATURES POSSIBLY FALLING BELOW THE FREEZING
MARK FROM THURSDAY NIGHT TO SUNDAY NIGHT. FREEZE WATCHES OR
WARNINGS...AS WELL AS FROST ADVISORIES...COULD BE POSTED AT ANY
TIME FOR THIS PERIOD. PLAN AHEAD NOW TO TAKE STEPS TO PROTECT
TENDER VEGETATION LATER THIS WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

MOORE