Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 650, NWS Greenville-Spartanburg, SC

August 21, 2011Cherokee County, York County, South Carolina; Cleveland County, Gaston County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 21, 2011, 8:51 PM EDT for Cherokee County, York County, South Carolina; Cleveland County, Gaston County, North Carolina. It was in force for 54 min. 1 report 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 21, 2011, 8:51 PM EDT (00:51 UTC)
Expired
Aug 21, 2011, 9:45 PM EDT
In force
54 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Cleveland County, NC, Gaston County, NC, Cherokee County, SC, York County, SC

The radar

The Greer radar (KGSP), 90 km from the middle of the area, began a volume at 00:54 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 21, 9:00 PM EDTTSTM WND DMG2 S Shelby, NCSEVERAL SMALL TO LARGE TREE LIMBS DOWN. SMALL 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 one storm report to this severe thunderstorm warning; the first came 9 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, 0.9 hours before the alert went out and 162 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 2011-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1377 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 2011-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
1377 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
1266 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

386 
WUUS52 KGSP 220051
SVRGSP
NCC045-071-SCC021-091-220145-
/O.NEW.KGSP.SV.W.0650.110822T0051Z-110822T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
851 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CLEVELAND COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  GASTON COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  NORTHEASTERN CHEROKEE COUNTY IN UPSTATE SOUTH CAROLINA...
  NORTH CENTRAL YORK COUNTY IN UPSTATE SOUTH CAROLINA...

* UNTIL 945 PM EDT

* AT 845 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 4 MILES
  NORTHWEST OF EARL...OR 5 MILES SOUTHWEST OF SHELBY...MOVING EAST AT
  20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PATTERSON SPRINGS AND EARL...
  PATTERSON SPRINGS AND BLACKSBURG...
  GROVER...
  KINGS MOUNTAIN AND KINGS MOUNTAIN STATE PARK...
  BESSEMER CITY...
  CROWDERS AND GASTONIA...

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 3502 8106 3513 8169 3534 8168 3536 8101
TIME...MOT...LOC 0051Z 275DEG 18KT 3523 8156

$$
07
2 follow-up statements
538 
WWUS52 KGSP 220119
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
919 PM EDT SUN AUG 21 2011

NCC045-071-SCC021-091-220145-
/O.CON.KGSP.SV.W.0650.000000T0000Z-110822T0145Z/
CLEVELAND NC-GASTON NC-CHEROKEE SC-YORK SC-
919 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR NORTH CENTRAL YORK...NORTHEASTERN CHEROKEE...GASTON AND
SOUTHEASTERN CLEVELAND COUNTIES...

AT 915 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 EARL...OR 8 MILES SOUTH OF SHELBY...MOVING EAST AT 20
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GROVER...KINGS MOUNTAIN STATE PARK...KINGS MOUNTAIN...STANLEY...
RANLO...MOUNT HOLLY...MCADENVILLE...LOWELL...GASTONIA...DALLAS...
CROWDERS...CRAMERTON...BESSEMER CITY...BELMONT AND CLOVER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3502 8106 3512 8160 3534 8156 3536 8101
TIME...MOT...LOC 0119Z 275DEG 18KT 3518 8150

$$

07
752 
WWUS52 KGSP 220140
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
940 PM EDT SUN AUG 21 2011

NCC045-071-SCC021-091-220150-
/O.EXP.KGSP.SV.W.0650.000000T0000Z-110822T0145Z/
CLEVELAND NC-GASTON NC-CHEROKEE SC-YORK SC-
940 PM EDT SUN AUG 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL YORK...
NORTHEASTERN CHEROKEE...GASTON AND SOUTHEASTERN CLEVELAND COUNTIES
WILL EXPIRE AT 945 PM EDT...

THE THUNDERSTORM WEAKENED BELOW SEVERE LIMITS.

LAT...LON 3502 8106 3512 8160 3534 8156 3536 8101
TIME...MOT...LOC 0140Z 275DEG 18KT 3517 8137

$$

07

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 21, 7:49 PM EDT, 1 hour 2 minutes earlier.

Area forecast discussion, Aug 21, 7:49 PM EDT, 1 hour 2 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
749 PM EDT SUN AUG 21 2011

.SYNOPSIS...
A COLD FRONT WILL MOVE ACROSS THE REGION TONIGHT...AND SETTLE JUST
SOUTHEAST OF THE AREA ON MONDAY. DRIER AIR WILL ARRIVE AS HIGH
PRESSURE BUILDS TO THE NORTHWEST ON TUESDAY. ATLANTIC MOISTURE WILL
THEN STEADILY RETURN TO THE REGION DURING THE LATER PART OF THE
WEEK. THE PROGRESS OF TROPICAL SYSTEM IRENE WILL NEED TO BE CLOSELY
MONITORED FOR NEXT WEEKEND.

&&

.NEAR TERM /THROUGH MONDAY/...
THE CONVECTION TOOK ITS OWN SWEET TIME TO INITIATE...BUT FINALLY
DID. THIS WAS EXPECTED WITH A SHORT WAVE MOVING OVER A MOIST
UNSTABLE AIRMASS. STILL...EXPECT CONVECTION TO REMAIN ISOLATED TO
SCT AS IT MOVES OVER THE PIEDMONT THIS EVENING AND END BEFORE
MIDNIGHT. MODELS TIME A WEAK COLD FRONT TO MOVE NW TO SE ACROSS THE
CWA LATE TONIGHT AND EARLY MONDAY MORNING. EXPECT CLEARING BEHIND
THE FRONT...EXCEPT OVER THE MTNS WHERE LOW LEVEL MOISTURE AND NWLY
FLOW CONTINUE. GUIDANCE HAS SLOWED THE DRIER AIR MOVING IN BEHIND
THE FRONT AND THE STRENGTH OF THE WNW FLOW. THIS WILL LIKELY LEAD TO
MORE FOG FORMATION OVERNIGHT THAN PREVIOUSLY EXPECTED. LOW
TEMPERATURES SHOULD RANGE AROUND NORMAL. EXPECT ISOLATED SHRA/TSRA
TO REMAIN ACROSS THE WESTERN SLOPES THROUGH DAYBREAK.

MONDAY...THE COLD FRONT WILL COMPLETLEY MOVE SOUTH OF THE
CWA...RESULTING IN A STEADY FALL IN DEWPOINTS. HOWEVER...DAYTIME
HEATING AND CONVERGENCE ALONG THE FRONT MAY SUPPORT A FEW SHRA/TSRA
ACROSS THE UPPER SAVANNAH RIVER VALLEY AND SOUTHERN UPSTATE...I WILL
FORECAST 20 POPS. OTHERWISE...TEMPS WILL WARM QUICKLY WITH MOSTLY TO
PARTLY SUNNY CONDITIONS. HIGHS MAY VERIFY 2 TO 4 DEGREES ABOVE
TODAY/S VALUES.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/...
AS OF 130 PM SUNDAY...THE SHORT TERM FCST PICKS UP AT 00Z ON TUESDAY
WITH THE AXIS OF THE UPPER TROF LOCATED TO OUR NORTHEAST AND A STEEP
UPPER RIDGE COVERING THE WESTERN TWO THIRDS OF THE CONUS. HEIGHTS
ARE EXPECTED TO RISE THRU THE PERIOD AS THE UPPER TROF LIFTS TO THE
NE AND THE UPPER RIDGE MAINTAINS ITS STRENGTH TO OUR WEST. ON
WED..MODELS GENERATE A FAIRLY POTENT LOOKING H5 SHORTWAVE OVER THE
GREAT LAKES AND PROPAGATE IT TOWARDS THE FCST AREA WED
AFTERNOON/EVENING. ITS LOOKING LIKE THE SW MIGHT PASS TO FAR TO THE
NORTH TO PROVIDE MUCH IN THE WAY OF DYNAMIC LIFTING OVER THE CWFA
BUT OF COURSE IT COULD TRACK FARTHER TO THE SOUTH.

ON TUESDAY...A SFC HIGH WILL RIDGE DOWN FROM THE NW BRINGING COOLER
AND DRIER NORTHERLY LOW LVL FLOW WITH MOSTLY CLEAR SKIES AND TEMPS
RIGHT AROUND CLIMO. ON WEDNESDAY...THE SFC HIGH GETS PUSHED OFF THE
EASTERN SEABOARD AND OUR BOUNDARY LAYER FLOW VEERS AROUND TO THE NE
AND THEN EAST. THIS SHOULD PROVIDE SOME INCREASED LOW TO MID LVL
MOISTURE...HOWEVER AT THIS POINT MOST OF THE MODEL GUIDANCE IS
SUGGESTING THAT ANY MOISTURE SURGE WILL BE MODEST THRU 00Z THURS.
THERE WILL LIKELY BE A BROAD AREA OF UPPER LVL DIVERGENCE OVER THE
FCST AREA WED AFTERNOON/EVENING...HOWEVER MOST OF THE LIFT COULD BE
GENERATED TO OUR NORTH. I DO RAMP POPS UP FROM THE LATE MORNING
HOURS THRU THE EVENING WITH AT LEAST A SLIGHT CHANCE OVER MOST OF
THE CWFA AT SOME POINT...YET I DOUBT WE WILL SEE ANY WIDESPREAD
CONVECTION. TEMPS ARE EXPECTED TO BE A DEGREE OR TWO COOLER THAN THE
PREVIOUS DAY...WITH THE LOWER ELEVATIONS REACHING THE UPPER 80S AND
THE LOWER 80S IN THE MT VALLEYS.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
AS OF 215 PM SUNDAY...THE MEDIUM RANGE PART OF THE FORECAST WILL
CONTINUE TO FOCUS UPON THE FATE OF IRENE NEXT WEEKEND. BEFORE THE
STORM MAKES ITS APPROACH FROM THE SOUTH...WE WILL HAVE TO DEAL WITH
SOME MINOR CONCERNS LATE IN THE WEEK...MADE MORE COMPLICATED BY THE
PRESENCE OF IRENE. THE TREND IN THE GUIDANCE IS TO SHEAR APART A
SHORT WAVE DROPPING DOWN FROM THE NORTHWEST ON WEDNESDAY NIGHT AS A
COL REGION DEVELOPS OVER THE CAROLINAS WITH IRENE MOVING NORTH OF
CUBA. THIS WILL LIKELY HALT THE PROGRESS OF A SURFACE FRONT AND
CAUSE IT TO STALL ON THE W SIDE OF THE MTNS ON THURSDAY. IF THAT
HAPPENS...WE WILL LOSE SOME OF THE IMPETUS FOR SHOWER AND
THUNDERSTORM ACTIVITY FOR THURSDAY AND FRIDAY. IN FACT...THE MODELS
RETAIN SOME WEAK HIGH PRESSURE ACROSS THE WESTERN CAROLINAS IN
BETWEEN THE FRONT W OF THE MTNS AND IRENE TO THE S. THIS WOULD ALSO
BE MORE UNFAVORABLE FOR CONVECTION. BOTTOM LINE IS THINGS ARE
LOOKING SOMEWHAT DRIER FOR THURSDAY AND FRIDAY AND PRECIP CHANCES
WILL BE DIMINISHED...WHILE TEMPS ARE NUDGED UP A BIT.

FOR SATURDAY AND SUNDAY...THE LATEST GUIDANCE CONTINUES TO MOVE A
LOW OF TROPICAL ORIGIN SOMEWHERE ACROSS THE CAROLINAS...BUT THERE IS
A GREAT DEAL OF UNCERTAINTY REGARDING THE TRACK. SOMETHING FARTHER
WEST LIKE THE 00Z ECMWF WOULD RESULT IN A SIGNIFICANT AMOUNT OF RAIN
AND A HIGH POTENTIAL FOR FLOODING...WHILE A TRACK SIMILAR TO THE 12Z
GFS MIGHT ONLY AFFECT THE WRN PIEDMONT. THE FORECAST WILL CONTAIN A
40-50 PERCENT CHANCE OF RAIN WHICH IS MORE OF A MEASURE OF THE
UNCERTAINTY IN THE LOW TRACK. OBVIOUSLY IF THE LOW TAKES A WESTERN
TRACK WE ARE LOOKING AT CERTAIN HEAVY RAIN...BUT EVEN THE EASTERN
TRACK WOULD REQUIRE A CATEGORICAL POP AROUND CHARLOTTE. THE BEST
ADVICE FOR NOW IS FOR ALL INTERESTS ACROSS THE WESTERN CAROLINAS AND
NORTHEAST GEORGIA TO MONITOR THE FORECAST FOR NEXT WEEKEND.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
AT KCLT AND ELSEWHERE...IT TOOK A WHILE BUT THE SHORT WAVE MOVING
ACROSS THE AREA FINALLY PRODUCED ENUF LIFT TO TAP THE MOIST UNSTABLE
AIR MASS AND PRODUCE ISOLATED TO SCT CONVECTION. IN GENERAL...EXPECT
VFR CONDITIONS UNLESS A CELL MOVES OVER THE AIRFIELD. ALTHOUGH I
HAVE PUT IN TS AT SITES WHERE CELLS ARE CURRENTLY IN PLAY. ACTIVITY
SHOULD MOVE EAST OF THE AREA BY EARLY EVENING. A WEAK COLD FRONT IS
EXPECTED TO SWEEP NW TO SE ACROSS THE REGION TONIGHT AND EARLY
MONDAY MORNING. AFTER FROPA...WINDS WILL FAVOR A DIRECTION BETWEEN
340 TO 010 DEGREES AROUND 8 KTS. GUIDANCE HAS SLOWED THE DROP IN
DEWPOINTS ACROSS THE AREA. GIVEN THIS...GUIDANCE NOW ALL AGREES ON
MVFR MOST SITES OUTSIDE OF THE MTNS...AND IFR MTN VALLEYS. HAVE GONE
WITH THIS SCENARIO. EXPECT NLY WINDS AND SCT CU DURING THE AFTERNOON
WITH ISOLATED CONVECTION POSSIBLE OVER THE UPPER SAV RVR VALLEY.

OUTLOOK...DRIER CONDITIONS ARE EXPECTED TO CONTINUE ON TUESDAY. MORE
UNSETTLED WEATHER IS EXPECTED TO RETURN 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...JPT
NEAR TERM...NED/RWH
SHORT TERM...JPT
LONG TERM...PM
AVIATION...NED/RWH
Hazardous weather outlook, Aug 21, 4:01 PM EDT, 4 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
401 PM EDT SUN AUG 21 2011

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-222015-
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-
401 PM EDT SUN AUG 21 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.

SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND EAST OF THE BLUE
RIDGE THIS AFTERNOON...AND THEN MOVE EASTWARD THROUGH THE
PIEDMONT THROUGH THE EVENING HOURS. SOME OF THESE THUNDERSTORMS
MAY BECOME SEVERE...PRODUCING DAMAGING WIND GUSTS AND HAIL AS
LARGE AS QUARTERS. THE THUNDERSTORMS WILL ALSO PRODUCE FREQUENT
LIGHTNING AND TORRENTIAL RAINFALL. ANY LOCATIONS AFFECTED BY
MULTIPLE THUNDERSTORMS COULD SEE LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

A LOW PRESSURE SYSTEM OF TROPICAL ORIGIN...CURRENTLY KNOWN AS
IRENE...MAY AFFECT PARTS OF THE WESTERN CAROLINAS AND NORTHEAST
GEORGIA NEXT WEEKEND. FUTURE DEVELOPMENTS WITH REGARD TO THE TRACK
OF THE SYSTEM WILL DETERMINE HOW MUCH...IF ANY...HEAVY RAIN AND
FLOODING WILL IMPACT THE REGION.

.SPOTTER INFORMATION STATEMENT...

NONE.

MOORE

In the hours before

Special weather statement, Aug 21, 7:47 PM EDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
747 PM EDT SUN AUG 21 2011

NCZ036-056-069-071-220030-
CATAWBA-IREDELL-LINCOLN-MECKLENBURG-
747 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN LINCOLN...NORTHERN
MECKLENBURG...SOUTHEASTERN CATAWBA AND SOUTHERN IREDELL COUNTIES
THROUGH 830 PM EDT...

AT 743 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MAIDEN...OR 6 MILES SOUTHEAST OF NEWTON...
MOVING EAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  DENVER...
  TERRELL...
  LAKE NORMAN...
  CORNELIUS...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

FREQUENT 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 3539 8082 3552 8129 3570 8123 3566 8077
      3565 8076

07
Special weather statement, Aug 21, 8:03 PM EDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
803 PM EDT SUN AUG 21 2011

NCZ082-220030-
UNION-
803 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN UNION COUNTY THROUGH 830
PM EDT...

AT 759 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR WINGATE...OR 7 MILES EAST OF MONROE...MOVING
EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  MARSHVILLE...
  STURDIVANTS...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

FREQUENT 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 3496 8029 3495 8030 3483 8031 3483 8053
      3508 8048 3511 8029 3503 8029

07
Special weather statement, Aug 21, 8:13 PM EDT, 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
813 PM EDT SUN AUG 21 2011

NCZ068>070-220100-
CLEVELAND-GASTON-LINCOLN-
813 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CLEVELAND...SOUTHERN
LINCOLN AND WESTERN GASTON COUNTIES THROUGH 900 PM EDT...

AT 808 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR KINGSTOWN...OR 5 MILES NORTHWEST OF
SHELBY...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  SHELBY...
  CHERRYVILLE...
  KINGS MOUNTAIN...
  BESSEMER CITY...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

LAT...LON 3544 8115 3519 8118 3526 8170 3544 8168

07
Special weather statement, Aug 21, 8:20 PM EDT, 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
820 PM EDT SUN AUG 21 2011

SCZ009-014-220045-
CHESTER-YORK-
820 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CHESTER AND
SOUTHEASTERN YORK COUNTIES THROUGH 845 PM EDT...

AT 816 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF EDGEMOOR...OR 10 MILES
NORTHEAST OF CHESTER...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  RICHBURG...
  CATAWBA...
  FORT LAWN...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

FREQUENT 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 3467 8088 3463 8089 3471 8118 3488 8113
      3486 8086 3484 8086 3482 8089 3477 8086
      3474 8087 3469 8085

07
Special weather statement, Aug 21, 8:32 PM EDT, 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
832 PM EDT SUN AUG 21 2011

NCZ070>072-220115-
CABARRUS-GASTON-MECKLENBURG-
832 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL MECKLENBURG...
NORTHEASTERN GASTON AND WESTERN CABARRUS COUNTIES THROUGH 915 PM
EDT...

AT 829 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MOUNTAIN ISLAND LAKE...OR 10 MILES NORTHWEST
OF CENTER CITY CHARLOTTE...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  PAW CREEK...
  HUNTERSVILLE...
  I-77 AT I-85...
  UNC CHARLOTTE...
  HARRISBURG...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

LAT...LON 3520 8054 3521 8055 3513 8065 3524 8108
      3540 8105 3540 8096 3543 8095 3546 8050

07
Special weather statement, Aug 21, 8:45 PM EDT, 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
845 PM EDT SUN AUG 21 2011

SCZ014-220115-
CHESTER-
845 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN CHESTER COUNTY THROUGH
915 PM EDT...

AT 841 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR RICHBURG...OR 10 MILES EAST OF CHESTER...
MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  FORT LAWN...
  GREAT FALLS RESERVOIR...

VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.

FREQUENT 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 3467 8088 3465 8089 3458 8088 3463 8114
      3482 8111 3482 8088 3477 8086 3474 8087
      3470 8085

07

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 8:10 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson65 min
Aug 21, 8:20 PM EDTSpecial Weather StatementGSPChester25 min
Aug 21, 8:34 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson, Greenville, Greenwood, Laurens56 min
Aug 21, 8:45 PM EDTSpecial Weather StatementGSPChester30 min
Aug 21, 9:27 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson63 min
Aug 21, 9:53 PM EDTSpecial Weather StatementGSPAnderson52 min
Aug 21, 10:12 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson45 min
Aug 21, 10:48 PM EDTSpecial Weather StatementGSPChester27 min
Aug 22, 2:44 PM EDTSpecial Weather StatementGSPGreenville46 min
Aug 21, 8:03 PM EDTSpecial Weather StatementGSPUnion27 min
Aug 21, 8:07 PM EDTSevere Thunderstorm WarningGSPUnion23 min
Aug 21, 8:13 PM EDTSpecial Weather StatementGSPCleveland, Gaston47 min
Aug 21, 8:32 PM EDTSpecial Weather StatementGSPCabarrus, Mecklenburg43 min
Aug 21, 9:06 PM EDTSevere Thunderstorm WarningGSPCabarrus, Mecklenburg, Union54 min
Aug 21, 9:12 PM EDTSpecial Weather StatementGSPUnion48 min
Aug 21, 9:58 PM EDTSevere Thunderstorm WarningGSPUnion32 min
Aug 21, 11:01 PM EDTSpecial Weather StatementGSPUnion44 min
Aug 22, 12:08 AM EDTSpecial Weather StatementGSPMecklenburg52 min
Aug 22, 12:13 AM EDTSpecial Weather StatementGSPUnion47 min
Aug 22, 1:00 AM EDTSpecial Weather StatementGSPUnion45 min
Aug 22, 2:34 AM EDTSpecial Weather StatementGSPAvery, Madison, Mitchell, Yancey56 min
Aug 22, 3:07 AM EDTSpecial Weather StatementGSPHaywood, Madison, Swain53 min
Aug 22, 3:29 AM EDTSpecial Weather StatementGSPAvery, Buncombe, Burke, Caldwell, McDowell, Yancey46 min
Aug 22, 3:54 AM EDTSpecial Weather StatementGSPHaywood, Swain51 min
Aug 22, 4:20 AM EDTSpecial Weather StatementGSPHenderson40 min
Aug 22, 5:36 AM EDTSpecial Weather StatementGSPHenderson, Polk54 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011Severe 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.