Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 640, NWS Greenville-Spartanburg, SC

August 20, 2011Cleveland County, Gaston County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 20, 2011, 10:00 PM EDT for Cleveland County, Gaston County, North Carolina. It was in force for 48 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 20, 2011, 10:00 PM EDT (02:00 UTC)
Expired
Aug 20, 2011, 10:48 PM EDT
In force
48 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Cleveland County, NC, Gaston County, NC

The radar

The Greer radar (KGSP), 114 km from the middle of the area, began a volume at 02:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Aug 20, 10:01 PM EDTHAIL 1Kings Mountain, NCQUARTER SIZED HAIL REPORTED BY PUBLIC.
Aug 20, 10:05 PM EDTTSTM WND DMGKings Mountain, NCCARPORT BLOWN OFF BY WIND AND LIGHT POLE BLOWN OVER.
Aug 20, 10:15 PM EDTTSTM WND DMG2 Nnw Gastonia, NCONE TREE LIMB DOWN ON POWERLINES AS REPORTED BY FIRE STATION 2.
Aug 20, 10:15 PM EDTHAIL 0.752 Nnw Gastonia, NCGASTONIA FIRE STATION 2 REPORTED BRIEF DIME SIZED HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 1 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.0 hours before the alert went out and 137 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2011-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 797 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2011-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
797 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1344 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

896 
WUUS52 KGSP 210200
SVRGSP
NCC045-071-210300-
/O.NEW.KGSP.SV.W.0640.110821T0200Z-110821T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1000 PM EDT SAT AUG 20 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CLEVELAND COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  GASTON COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 1100 PM EDT

* AT 955 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 2 MILES
  SOUTH OF BESSEMER CITY...OR 7 MILES WEST OF GASTONIA...MOVING
  NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CROWDERS...
  GASTONIA...
  DALLAS...
  HIGH SHOALS...
  RANLO AND LOWELL...
  LOWELL AND CRAMERTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM 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.

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

&&

LAT...LON 3534 8099 3528 8101 3522 8102 3516 8131
      3517 8138 3530 8144 3541 8119 3540 8096
      3537 8098 3536 8097 3537 8096 3536 8092
TIME...MOT...LOC 0200Z 247DEG 10KT 3526 8128

$$

RWH
3 follow-up statements
115 
WWUS52 KGSP 210218
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1018 PM EDT SAT AUG 20 2011

NCC045-210228-
/O.CAN.KGSP.SV.W.0640.000000T0000Z-110821T0300Z/
CLEVELAND NC-
1018 PM EDT SAT AUG 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLEVELAND COUNTY
IS CANCELLED...

THE STORM HAS MOVED EAST OF THE AREA.

LAT...LON 3536 8092 3534 8099 3522 8102 3516 8133
      3526 8132 3529 8136 3534 8136 3541 8119
      3540 8096 3537 8098 3536 8097 3537 8096
TIME...MOT...LOC 0218Z 250DEG 14KT 3529 8119

$$

NCC071-210300-
/O.CON.KGSP.SV.W.0640.000000T0000Z-110821T0300Z/
GASTON NC-
1018 PM EDT SAT AUG 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR GASTON COUNTY...

AT 1016 PM 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 DALLAS...OR NEAR GASTONIA...MOVING EAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DALLAS AND GASTONIA...
  HIGH SHOALS...
  RANLO...
  LOWELL AND CRAMERTON...
  STANLEY AND MCADENVILLE...
  STANLEY AND BELMONT...

LAT...LON 3536 8092 3534 8099 3522 8102 3516 8133
      3526 8132 3529 8136 3534 8136 3541 8119
      3540 8096 3537 8098 3536 8097 3537 8096
TIME...MOT...LOC 0218Z 250DEG 14KT 3529 8119

$$

RWH
834 
WWUS52 KGSP 210237
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1037 PM EDT SAT AUG 20 2011

NCC071-210300-
/O.CON.KGSP.SV.W.0640.000000T0000Z-110821T0300Z/
GASTON NC-
1037 PM EDT SAT AUG 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR EASTERN GASTON COUNTY...

AT 1034 PM 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 RANLO...OR 5 MILES NORTHEAST OF GASTONIA...MOVING EAST
AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  STANLEY AND MCADENVILLE...
  BELMONT...
  MOUNT HOLLY...
  LUCIA AND MOUNTAIN ISLAND LAKE...

LAT...LON 3536 8092 3534 8099 3528 8101 3522 8102
      3520 8115 3532 8122 3541 8119 3540 8096
      3537 8098 3536 8097 3537 8096
TIME...MOT...LOC 0237Z 250DEG 14KT 3532 8110

$$

RWH
401 
WWUS52 KGSP 210248
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1048 PM EDT SAT AUG 20 2011

NCC071-210258-
/O.CAN.KGSP.SV.W.0640.000000T0000Z-110821T0300Z/
GASTON NC-
1048 PM EDT SAT AUG 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN GASTON COUNTY IS
CANCELLED...

THE STORM HAS WEAKENED BELOW SEVERE LEVELS.

LAT...LON 3536 8092 3534 8099 3528 8101 3522 8102
      3520 8115 3532 8122 3541 8119 3540 8096
      3537 8098 3536 8097 3537 8096
TIME...MOT...LOC 0248Z 250DEG 14KT 3533 8105

$$

RWH

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 20, 9:23 PM EDT, 37 minutes earlier.

Area forecast discussion, Aug 20, 9:23 PM EDT, 37 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
923 PM EDT SAT AUG 20 2011

.SYNOPSIS...
WEAK HIGH PRESSURE WILL GIVE WAY TO A COLD FRONT THAT WILL APPROACH
FROM THE NORTHWEST LATE SUNDAY. THE FRONT IS EXPECTED TO STALL JUST
SOUTH OF OUR AREA EARLY IN THE WEEK AND SLOWLY DISSIPATE. MOISTURE
WILL INCREASE LATE IN THE WEEK AS WE BECOME MORE CONCERNED OF
TROPICAL ACTIVITY.

&&

.NEAR TERM /THROUGH SUNDAY/...
AT 915 PM EDT...AN UPPER RIDGE WAS CENTERED OVER TX...WHILE AND
UPPER TROUGH WAS LOCATED FROM HUDSON BAY TO THE GREAT LAKES...AND A
WEAKENING TROUGH WAS LOCATED JUST OFF THE EAST COAST. WEAK HIGH
PRESSURE AT THE SURFACE EXTENDED ALONG THE EAST COAST...WHILE A COLD
FRONT WAS APPROACHING THE OH RIVER VALLEY FORM THE NW. CONVECTION
HAS FLARED UP OVER UPSTATE SC WHERE TWO OUTFLOW BOUNDARIES COLLIDED.
THIS ACTIVITY IS PUSHING OFF TO THE ESE...AND WILL TAKE SEVERAL
HOURS TO EXIT THE AREA...WEAKENING AS IT DOES IN DIMINISHING
INSTABILITY. GUIDANCE WAS ALREADY PROJECTING FOG ACROSS MUCH OF THE
AREA...AND AREAS THAT SAW HEAVY RAINFALL CAN EXPECT LOW VISIBILITIES
IN LIGHT WINDS AT DAWN. MINIMUM TEMPERATURES WILL BE AROUND
SUMMERTIME NORMALS IN A MOIST AIR MASS.

SUNDAY...A COLD FRONT WILL SWEEP EAST ACROSS KY/TN THROUGH THE
DAY...REACHING THE SOUTHERN APPALACHIANS DURING THE LATE AFTERNOON.
SOUTH SFC WINDS AHEAD OF THE FRONT WILL STRENGTHEN THROUGH THE
DAY...MAINTAINING DEWPOINT VALUES IN THE UPPER 60S TO AROUND 70.
HIGH TEMPS WILL WARM INTO THE MID 80S ACROSS THE MTNS TO AROUND 90
EAST. FORECAST SOUNDINGS INDICATE THAT THE MID INVERSION WILL
FLATTEN...STEEPENING LAPSE RATES BELOW H6. IN FACT...FORECAST
SOUNDINGS SUPPORT CAPES BETWEEN 2000 TO 3000 J/KG. IN ADDITION...LOW
TO MID LEVEL WINDS WILL INCREASE TO 20 TO 30 KTS...ESPECIALLY IN THE
MID LEVELS. MESOSCALE MODELS INDICATE THAT TSRA WILL DEVELOP ACROSS
THE MTNS AROUND MID DAY AND DEVELOP INTO A BAND PARALLEL TO THE
FRONT. 4 KM WRF INDICATES THAT THE LINE WILL DEVELOP A HEALTHY COLD
POOL AND ACCELERATE EAST ACROSS THE FOOTHILLS AND PIEDMONT DURING
THE AFTERNOON. GIVEN THE INSTABILITY AND WINDS...IT APPEARS THAT
MULTICELL LINES WILL HAVE THE POTENTIAL FOR SVR WIND AND POSSIBLY
SVR HAIL...ESPECIALLY ACROSS THE NC ZONES GIVEN GREATER WIND SPEEDS.
I WILL INCREASE POPS TO LIKELY ACROSS THE AREA. WE WILL HIGHLIGHT
THE SVR POTENTIAL IN THE HWO.

&&

.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/...
AS OF 230 PM SATURDAY...THE MODELS REINFORCE THE UPPER TROF ALONG
THE EAST COAST ON SUNDAY NIGHT AS A STRONG UPPER SHORT WAVE ROTATES
THROUGH THE EASTERN GREAT LAKES. THIS SHOULD HAVE NO TROUBLE PUSHING
A COLD FRONT THROUGH THE FORECAST AREA SUNDAY EVENING. EXPECT A
CONTINUATION OF THE CONVECTIVE ACTIVITY THAT WE HAVE AT SUNSET
SUNDAY EVENING...MOVING EAST ACROSS THE PIEDMONT WITH THE FRONT.
HAVE HELD ONTO A LOW CHANCE POP ON THE TN BORDER FOR LINGERING
UPSLOPE SHOWERS AS THE FRONT MOVES THROUGH. THE SHOWERS SHOULD BE TO
THE EAST OF THE FORECAST AREA BY AROUND SUNRISE ON MONDAY.
THEREAFTER...EXPECT A QUIET START TO THE WORK WEEK.

THE WESTERN CAROLINAS SHOULD BE UNDER A DEEP AND DRY NW FLOW ALOFT
BOTH MONDAY AND TUESDAY AS THE UPPER TROF AXIS HOLDS ALONG THE E
COAST. THAT WILL SUPPORT SURFACE HIGH PRESSURE SETTLING DOWN OVER
THE CENTRAL APPALACHIANS AND MID ATLANTIC THROUGH TUESDAY. FOR THE
MOST PART...THIS SHOULD DISCOURAGE DEEP CONVECTION. ON MONDAY
AFTERNOON...THOUGH...HAVE ALLOWED A SLIGHT CHANCE OVER THE HIGHER
TERRAIN OWING TO LINGERING LOW LEVEL MOISTURE. MONDAY NIGHT...
TUESDAY...AND TUESDAY NIGHT SHOULD BE PRECIP-FREE. TEMPS WERE NUDGED
TOWARD A BLEND OF GUIDANCE IN GENERAL...BUT THE LOWER MET GUIDANCE
WAS FAVORED FOR TUESDAY NIGHT.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
AS OF 230 PM SATURDAY...WE WILL BEGIN WITH WHAT SEEMS REASONABLY
CERTAIN...AND THAT IS SOME MOISTURE RETURN STARTING EARLY WEDNESDAY
AND CONTINUING THROUGH THE END OF THE WEEK. ANOTHER REINFORCING
SHORT WAVE IS EXPECTED TO DROP DOWN THROUGH THE MIDWEST AND OH
VALLEY TUESDAY NIGHT AND WEDNESDAY WHICH WILL PUSH ANOTHER COLD
FRONT INTO THE REGION. WITH THE SURFACE HIGH MOVING OFF THE MID
ATLANTIC COAST TUESDAY NIGHT...EXPECT AN INFLUX OF MOISTURE FROM THE
ATLANTIC AHEAD OF THE FRONT. SO...SCATTERED THUNDERSTORMS LOOK LIKE
A SAFE BET ON WEDNESDAY AFTERNOON AND EVENING...AT LEAST OVER THE
MTNS AND FOOTHILLS. THE CONTINUATION OF THE MOIST EASTERLY FLOW
SHOWN BY THE MODELS SUGGESTS THAT WE WILL NOT SEE MUCH OF A DIURNAL
DROP OFF WEDNESDAY NIGHT...SO THE CHANCE POP WILL RUN RIGHT THROUGH
FRIDAY FOR THE MOST PART AS THE FRONT STALLS NEARBY.

WHICH BRINGS US TO THE WEEKEND...WHICH IS BY NO MEANS CERTAIN. IT
SEEMS REASONABLE TO EXPECT SOME PART OF THE SOUTHEAST TO BE IN SOME
DANGER FROM A TROPICAL CYCLONE SHOWN BY THE COLLECTION OF MODEL
GUIDANCE IN THE VICINITY OF THE FL PENINSULA ON SATURDAY. GOING WITH
THE HPC POSITION OVER THE ERN GULF SATURDAY MORNING...EXPECT EVEN
MORE ATLANTIC MOISTURE TO RUN UPSLOPE FROM THE SOUTHEAST AND HAVE
SOME FOCUS ALONG THE OLD SURFACE FRONT OVER THE CAROLINAS. SO...HAVE
LEANED TOWARD A LOWER DIURNAL RANGE OF TEMPS FOR SATURDAY AND
TRENDED TOWARD THE COOLER FIRST CUT OF HPC TEMPS. HAVE ALSO GONE
WITH A BLANKET CHANCE OF PRECIP THROUGH THE END OF THE DAY. PEOPLE
ACROSS THE CAROLINAS WILL WANT TO KEEP TRACK OF THIS ONE FOR
SATURDAY NIGHT AND SUNDAY.

&&

.AVIATION /02Z SUNDAY THROUGH THURSDAY/...
AT KCLT...CONVECTION SHOULD REMAIN NW OF FIELD...BUT MAY GET CLOSE
ENOUGH TO WHERE CB CAN BE SEEN. GUIDANCE FAVORS SOUTHERLY WINDS
OVERNIGHT AND INTO SUNDAY...AND MVFR FOG AROUND DAYBREAK SUNDAY.
MORE WIDESPREAD CONVECTION IS EXPECTED ON SUNDAY...MAINLY IN THE
AFTERNOON...AS A COLD FRONT MOVES INTO THE AREA. RESTRICTIONS WILL
BE POSSIBLE WITH THIS ACTIVITY...BUT WITH CONFIDENCE IN TIMING
LIMITED AT THIS TIME...ONLY CB WILL BE CARRIED.

ELSEWHERE...SCATTERED CONVECTION IN THE FOOTHILLS WILL DECREASE AS
IT DRIFTS SE THIS EVENING AND HEATING ABATES...BUT WITH INSTABILITY
SLOW TO DIMINISH...SOME ACTIVITY MAY LAST WELL INTO THE NIGHT.
TEMPORARY THUNDER WILL BE CARRIED AT MOST FOOTHILL SITES...WITH CB
AT KAVL AND KAND. GUIDANCE IS SUPPORTIVE OF MVFR FOG TOWARD DAWN AT
KHKY AND KAND...AND IFR OR LOWER AT KAVL. WITH HEAVY RAINFALL AT
KGSP AND KGMU THIS EVNEING...LOW END MVFR IS LIKELY...IF NOT
LOWER. LIGHT AND VARIABLE WINDS TONIGHT BECOME SW ON
SUNDAY...EXCEPT NW AT KAVL AS THEY CHANNEL UPVALLEY. CONVECTIVE
COVERAGE WILL BE GREATER ON SUNDAY AS A COLD FRONT ARRIVES FROM
THE NW. CB WILL BE CARRIED IN THE AFTERNOON. ANY RESTRICTIONS WILL
BE WITHHELD FROM THE TAF UNTIL CONFIDENCE ON TIMING IMPROVES.

OUTLOOK...A DECREASE IN CONVECTIVE COVERAGE IS EXPECTED BEHIND A
COLD FRONT ON MONDAY AND TUESDAY. MORE UNSETTLED WEATHER IS EXPECTED
BY MID WEEK AS ANOTHER COLD FRONT STALLS OVER THE AREA. MORNING FOG
WILL BE POSSIBLE...ESP IN MTN VALLEYS AND WHERE RAIN FALLS THE DAY
BEFORE.

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...PAT
NEAR TERM...JAT/NED
SHORT TERM...PM
LONG TERM...PM
AVIATION...JAT
Hazardous weather outlook, Aug 20, 2:56 PM EDT, 7 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
256 PM EDT SAT AUG 20 2011

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-211900-
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-
256 PM EDT SAT AUG 20 2011

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 WILL DEVELOP ACROSS THE WESTERN CAROLINAS
AND NORTHEAST GEORGIA THIS AFTERNOON AND EVENING. THE MAIN THREATS
WITH THESE THUNDERSTORMS WILL BE CLOUD TO GROUND LIGHTNING AND
BRIEFLY HEAVY RAINFALL. AN ISOLATED SEVERE THUNDERSTORM CANNOT BE
RULED OUT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

A LINE OF THUNDERSTORMS MAY DEVELOP OVER THE MOUNTAINS AND BLUE
RIDGE SUNDAY AFTERNOON...AND THEN SHOULD MOVE EAST ACROSS THE
FOOTHILLS AND PIEDMONT IN THE AFTERNOON AND EVENING. SOME OF THESE
THUNDERSTORMS MAY CONTAIN DAMAGING WIND GUSTS AND LARGE HAIL...
ESPECIALLY ACROSS NORTH CAROLINA.

.SPOTTER INFORMATION STATEMENT...

NONE.

MOORE

In the hours before

Special weather statement, Aug 20, 4:46 PM EDT, 5 hours 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
446 PM EDT SAT AUG 20 2011

NCZ503>506-202130-
BURKE MOUNTAINS-EASTERN MCDOWELL-GREATER BURKE-MCDOWELL MOUNTAINS-
446 PM EDT SAT AUG 20 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN MCDOWELL AND
WESTERN BURKE COUNTIES THROUGH 530 PM EDT...

AT 444 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES NORTHEAST OF LAKE JAMES...OR 11 MILES
NORTHEAST OF MARION...MOVING SOUTHEAST AT 5 MPH.

THIS STORM WILL BE NEAR...
  LAKE JAMES...

DIME SIZE HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3590 8173 3587 8171 3586 8167 3565 8174
      3574 8210 3587 8201 3589 8198 3591 8198

RWH
Special weather statement, Aug 20, 5:04 PM EDT, 4 hours 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
504 PM EDT SAT AUG 20 2011

NCZ033-501-503-202145-
AVERY-BURKE MOUNTAINS-CALDWELL MOUNTAINS-
504 PM EDT SAT AUG 20 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BURKE...
NORTHWESTERN CALDWELL AND SOUTHERN AVERY COUNTIES THROUGH 545 PM
EDT...

AT 501 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF JONAS RIDGE...OR 10 MILES
SOUTHEAST OF NEWLAND...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  GLOBE...

DIME SIZE HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3615 8182 3612 8181 3610 8149 3596 8160
      3590 8173 3590 8191 3596 8194 3595 8196
      3592 8195 3592 8199 3595 8204 3598 8206

RWH
Special weather statement, Aug 20, 5:39 PM EDT, 4 hours 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
539 PM EDT SAT AUG 20 2011

NCZ064-202230-
TRANSYLVANIA-
539 PM EDT SAT AUG 20 2011

...A STRONG THUNDERSTORM WILL AFFECT TRANSYLVANIA COUNTY THROUGH 630
PM EDT...

AT 534 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR BREVARD...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  ROSMAN...

DIME SIZE HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3526 8260 3522 8261 3514 8258 3512 8266
      3513 8268 3510 8270 3507 8278 3508 8277
      3509 8279 3527 8292 3532 8285 3532 8283
      3540 8274

RWH
Local storm report, Aug 20, 8:35 PM EDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
835 PM EDT SAT AUG 20 2011

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

0545 PM     TSTM WND DMG     4 SW BREVARD            35.20N 82.78W
08/20/2011                   TRANSYLVANIA       NC   911 CALL CENTER

            LIMBS AND POWERLINES DOWN ON ISLAND FORD ROAD.

0652 PM     HAIL             5 ENE JOANNA            34.44N 81.73W
08/20/2011  E0.75 INCH       LAURENS            SC   PUBLIC

            MARBLE TO DIME SIZED HAIL FELL ALONG HIGHWAY 66 NEAR DUCK
            POND DRIVE. ALSO SOME SMALL LIMBS DOWN IN THAT AREA FROM
            STRONG WIND GUSTS.

&&

OUTLAW
Special weather statement, Aug 20, 9:44 PM EDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
944 PM EDT SAT AUG 20 2011

NCZ068-070-210230-
CLEVELAND-GASTON-
944 PM EDT SAT AUG 20 2011

...A STRONG THUNDERSTORM WILL AFFECT GASTON AND SOUTHEASTERN
CLEVELAND COUNTIES THROUGH 1030 PM EDT...

AT 943 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF KINGS MOUNTAIN...OR 9 MILES
SOUTHEAST OF SHELBY...MOVING NORTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  KINGS MOUNTAIN...
  BESSEMER CITY...
  GASTONIA...

DIME SIZE HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH
THIS STORM.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3522 8107 3516 8126 3517 8149 3525 8155
      3542 8125 3541 8119

RWH

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 9:44 PM EDTSpecial Weather StatementGSPGaston46 min
Aug 21, 2:31 PM EDTSpecial Weather StatementGSPPolk44 min
Aug 21, 2:35 PM EDTSevere Thunderstorm WarningGSPHenderson, Polk26 min
Aug 21, 5:34 PM EDTSpecial Weather StatementGSPMcDowell41 min
Aug 21, 5:36 PM EDTSevere Thunderstorm WarningGSPBurke, McDowell, Rutherford54 min
Aug 21, 5:44 PM EDTSpecial Weather StatementGSPIredell46 min
Aug 21, 5:48 PM EDTSpecial Weather StatementGSPCabarrus27 min
Aug 21, 6:17 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan58 min
Aug 21, 6:48 PM EDTSevere Thunderstorm WarningGSPBurke, Catawba, Lincoln57 min
Aug 21, 7:23 PM EDTSpecial Weather StatementGSPUnion37 min
Aug 21, 7:33 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan57 min
Aug 21, 7:47 PM EDTSpecial Weather StatementGSPCatawba43 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.