Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 647, NWS Greenville-Spartanburg, SC

August 21, 2011Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 21, 2011, 8:07 PM EDT for Union County, North Carolina. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 21, 2011, 8:07 PM EDT (00:07 UTC)
Expired
Aug 21, 2011, 8:30 PM EDT
In force
23 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

County Union County, NC

The radar

The Columbia radar (KCAE), 124 km from the middle of the area, began a volume at 00:06 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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, 0.1 hours before the alert went out and 140 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.

658 
WUUS52 KGSP 220007
SVRGSP
NCC179-220030-
/O.NEW.KGSP.SV.W.0647.110822T0007Z-110822T0030Z/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

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

* UNTIL 830 PM EDT

* AT 803 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 NEAR
  MARSHVILLE...OR 9 MILES EAST OF MONROE...MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  STURDIVANTS...

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 3482 8031 3481 8032 3481 8043 3482 8069
      3508 8045 3507 8029
TIME...MOT...LOC 0007Z 278DEG 19KT 3497 8035

$$
07
2 follow-up statements
330 
WWUS52 KGSP 220016
SVSGSP

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

NCC179-220030-
/O.CON.KGSP.SV.W.0647.000000T0000Z-110822T0030Z/
UNION NC-
816 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR EASTERN UNION COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

AT 812 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 6 MILES SOUTHWEST OF STURDIVANTS...OR 10 MILES SOUTHEAST OF
MONROE...MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

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 3482 8031 3481 8032 3481 8043 3482 8069
      3508 8045 3507 8029
TIME...MOT...LOC 0016Z 278DEG 19KT 3487 8039

$$

07
149 
WWUS52 KGSP 220027
SVSGSP

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

NCC179-220037-
/O.EXP.KGSP.SV.W.0647.000000T0000Z-110822T0030Z/
UNION NC-
827 PM EDT SUN AUG 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN UNION COUNTY IN THE
PIEDMONT OF NORTH CAROLINA WILL EXPIRE AT 830 PM EDT...

THE THUNDERSTORM WEAKENED BELOW SEVERE LIMITS.

LAT...LON 3482 8031 3481 8032 3481 8043 3482 8069
      3508 8045 3507 8029
TIME...MOT...LOC 0027Z 278DEG 19KT 3486 8032

$$

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, 18 minutes earlier.

Area forecast discussion, Aug 21, 7:49 PM EDT, 18 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 6 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

Local storm report, Aug 21, 6:48 PM EDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
648 PM EDT SUN AUG 21 2011

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

0552 PM     HAIL             1 NE NEBO               35.73N 81.92W
08/21/2011  E0.50 INCH       MCDOWELL           NC   TRAINED SPOTTER

            SOME MARBLE SIZED HAIL FELL BRIEFLY AND SOME GUSTY WIND
            WITH THE HEAVY RAIN...BUT NOT ENOUGH TO BLOW DOWN
            ANYTHING.

0555 PM     HAIL             3 NE NEBO               35.75N 81.89W
08/21/2011  E1.00 INCH       BURKE              NC   PARK/FOREST SRVC

            A PERIOD OF DIME TO QUARTER SIZED HAIL FELL AT MOUNTAIN
            HARBOUR MARINA. ALSO HAD VERY STRONG WIND...PERHAPS
            ENOUGH TO BRING DOWN LIMBS OR A FEW TREES...BUT COULD NOT
            SEE ANY DOWN FROM THEIR LOCATION.

&&

OUTLAW
Special weather statement, Aug 21, 7:23 PM EDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
723 PM EDT SUN AUG 21 2011

NCZ082-220000-
UNION-
723 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL UNION COUNTY THROUGH 800
PM EDT...

AT 717 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES NORTHWEST OF WINGATE...OR 4 MILES
NORTHEAST OF MONROE...MOVING EAST AT 15 MPH.

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

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

LAT...LON 3484 8031 3484 8032 3494 8067 3512 8065
      3513 8028

07
Special weather statement, Aug 21, 7:39 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
739 PM EDT SUN AUG 21 2011

GAZ028-SCZ004-010-220030-
ANDERSON-GREATER OCONEE-HART-
739 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HART...SOUTHEASTERN
OCONEE AND SOUTHWESTERN ANDERSON COUNTIES THROUGH 830 PM EDT...

AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR FAIR PLAY...OR 11 MILES NORTHWEST OF
HARTWELL...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  REED CREEK...

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 3442 8309 3449 8305 3451 8308 3453 8309
      3460 8307 3457 8255 3425 8267 3424 8268

07
Special weather statement, Aug 21, 7:41 PM EDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
741 PM EDT SUN AUG 21 2011

SCZ006-007-220030-
GREATER GREENVILLE-SPARTANBURG-
741 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL SPARTANBURG AND EASTERN
GREENVILLE COUNTIES THROUGH 830 PM EDT...

AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR GREER...OR 10 MILES NORTHEAST OF DOWNTOWN
GREENVILLE...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  GSP AIRPORT...
  DUNCAN...
  REIDVILLE...
  ROEBUCK...

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 3487 8237 3504 8232 3504 8228 3503 8180
      3470 8191

07
Special weather statement, Aug 21, 7:47 PM EDT, 20 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, 4 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

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 8:03 PM EDTSpecial Weather StatementGSPUnion27 min
Aug 21, 8:13 PM EDTSpecial Weather StatementGSPCleveland, Gaston47 min
Aug 21, 8:32 PM EDTSpecial Weather StatementGSPCabarrus, Mecklenburg43 min
Aug 21, 8:51 PM EDTSevere Thunderstorm WarningGSPCleveland, Gaston54 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 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.