Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 646, NWS Greenville-Spartanburg, SC

August 21, 2011Davie County, Iredell County, Rowan County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 21, 2011, 7:33 PM EDT for Davie County, Iredell County, Rowan County, North Carolina. It was in force for 57 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, 7:33 PM EDT (23:33 UTC)
Expired
Aug 21, 2011, 8:30 PM EDT
In force
57 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Davie County, NC, Iredell County, NC, Rowan County, NC

The radar

The Roanoke radar (KFCX), 123 km from the middle of the area, began a volume at 23:34 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 12:00Z, 11.6 hours before the alert went out and 63 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 12:00Z on 2011-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1131 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 12:00Z on 2011-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
1131 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

056 
WUUS52 KGSP 212333
SVRGSP
NCC059-097-159-220030-
/O.NEW.KGSP.SV.W.0646.110821T2333Z-110822T0030Z/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIE COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  NORTHERN IREDELL COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  NORTH CENTRAL ROWAN COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 830 PM EDT

* AT 730 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 3 MILES
  EAST OF LOVE VALLEY...OR 14 MILES NORTH OF STATESVILLE...MOVING
  EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  UNION GROVE...
  TURNERSBURG...
  HARMONY...
  SHEFFIELD...
  MOCKSVILLE...COOLEEMEE AND FARMINGTON...

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 3588 8038 3588 8041 3587 8038 3584 8040
      3582 8047 3571 8045 3591 8102 3600 8100
      3603 8102 3606 8101 3607 8098 3605 8049
      3607 8046 3601 8041 3599 8041 3596 8037
      3592 8036
TIME...MOT...LOC 2333Z 286DEG 16KT 3598 8092

$$
07
2 follow-up statements
887 
WWUS52 KGSP 220005
SVSGSP

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

NCC059-097-159-220030-
/O.CON.KGSP.SV.W.0646.000000T0000Z-110822T0030Z/
DAVIE NC-IREDELL NC-ROWAN NC-
805 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTH CENTRAL ROWAN...NORTHEASTERN IREDELL AND DAVIE COUNTIES...

AT 803 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 4 MILES NORTHWEST OF TURNERSBURG...OR 12 MILES NORTH OF
STATESVILLE...MOVING EAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HARMONY...BERMUDA RUN...WOODLEAF...SHEFFIELD...MOCKSVILLE...FORK
CHURCH...FARMINGTON...COOLEEMEE AND ADVANCE

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 3588 8038 3588 8041 3587 8038 3584 8040
      3582 8047 3571 8045 3588 8094 3606 8091
      3605 8049 3607 8046 3601 8041 3599 8041
      3596 8037 3592 8036
TIME...MOT...LOC 0005Z 286DEG 16KT 3595 8084

$$

07
667 
WWUS52 KGSP 220021
SVSGSP

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

NCC059-097-159-220031-
/O.EXP.KGSP.SV.W.0646.000000T0000Z-110822T0030Z/
DAVIE NC-IREDELL NC-ROWAN NC-
821 PM EDT SUN AUG 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ROWAN...
NORTHEASTERN IREDELL AND DAVIE COUNTIES WILL EXPIRE AT 830 PM EDT...

THE THUNDERSTORM WEAKENED BELOW SEVERE LIMITS.

LAT...LON 3588 8038 3588 8041 3587 8038 3584 8040
      3582 8047 3571 8045 3588 8094 3606 8091
      3605 8049 3607 8046 3601 8041 3599 8041
      3596 8037 3592 8036
TIME...MOT...LOC 0021Z 286DEG 16KT 3593 8076

$$

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, 2:43 PM EDT, 4 hours 50 minutes earlier.

Area forecast discussion, Aug 21, 2:43 PM EDT, 4 hours 50 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
243 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/...
LATEST WV IMAGES INDICATES A SIGNIFICANT CONVECTIVE DERIVED MID
LEVEL VORT OVER EXTREME WESTERN NC. THIS FEATURE WILL PUSH ACROSS
THE FOOTHILLS AND PIEDMONT DURING THE REST OF THE AFTERNOON...MOVING
EAST BY EARLY EVENING. VIS SATE SHOWS WIDESPREAD MID AND HIGH CLOUDS
ALONG AND AHEAD OF THE FEATURE. AT 18Z...CU REMAINS LARGELY LIMITED
TO NE GA AND JUST EAST OF THE CLT METRO AREA. DEWPOINTS ACROSS THE
REGION ARE EXPECTED TO RANGE IN THE U60S TO AROUND 70...PRODUCING
CAPES BETWEEN 2500 TO 3500 J/KG. IT APPEARS THAT SHRA/TSRA WILL
GRADUALLY DEVELOP AND INCREASE IN COVERAGE BETWEEN 20Z TO 0Z. AIR MASS
AND STORM MODE INFORMATION BELOW.

I WILL FORECAST LIKELY POPS ACROSS THE HIGH ELEVATIONS ALONG THE
EASTERN SLOPES AND ALONG THE I-85 CORRIDOR FROM KGMU EAST TO CLT
LATE THIS AFTERNOON AND EARLY EVENING. ELSEWHERE...I WILL FORECAST
SOLID CHC POPS THROUGH 2Z.

OBSERVED SOUNDINGS AT KFFC AND KGSO MODIFIED TO AFTERNOON TEMP/DEWPT
INDICATES CAPES WILL LIKELY REACH BETWEEN 2500-3500 J/KG. FZL ON
BOTH SOUNDINGS ARE SLIGHTLY ABOVE 15 KFT WITH WBZ BETWEEN 12 TO 13
KFT. SATELLITE BLENDED TOTAL PW AND SOUNDINGS INDICATE VALUES
BETWEEN 1.5 TO 1.8 INCHES. IN ADDITION...FORECAST SOUNDINGS INDICATE
INCREASING MID LEVEL FLOW AROUND 20 TO 30 KTS WITH SWEAT VALUES
BETWEEN 200-300. WIND PROFILES FAVOR THE DEVELOPMENT OF MULTICELL
STORMS...LIKELY SW TO NE ORIENTED LINES OF STORMS...STORM MOTIONS
EAST. GIVEN THE STORM STRUCTURE...WIND FIELDS...DCAPE AROUND 1000
J/KG...AND MODERATE INSTABILITY...IT APPEARS THAT SEVERAL DAMAGING
WIND EVENTS WILL OCCUR THROUGH EARLY EVENING. HIGH FREEZING LEVELS
MAY LIMIT LARGE HAIL EVENT TO ONLY A FEW. IN ADDITION...PW ABOVE 125
PERCENT AND RECENT HEAVY RAINFALL MAY RESULT IN PATCHES OF EXCESSIVE
RUNOFF.

TONIGHT...DEEP CONVECTION SHOULD MOVE EAST OF THE CWA BY MID
EVENING. MODELS TIME A WEAK COLD FRONT TO MOVE NW TO SE ACROSS THE
CWA LATE TONIGHT AND EARLY MONDAY MORNING. PARTIAL CLEARING BEHIND
THE FRONT SHOULD OCCUR FROM WEST TO EAST. NNW WINDS WILL
LIKELY DEVELOP AND PERSIST...LIMITING THE OVERALL FOG POTENTIAL. LOW
TEMPERATURES SHOULD RANGE AROUND NORMAL. EXPECT PATCHES OF LOW
UPSLOPE CLOUDS AND ISO 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 /19Z SUNDAY THROUGH FRIDAY/...
AT KCLT AND ELSEWHERE...WIDESPREAD HIGH CLOUDS WILL GRADUALLY MOVE
EAST LATER THIS AFTERNOON. EXPECTED CU TO INCREASE ACROSS THE REGION
THROUGH 19Z...FOLLOWED BY SHRA/TSRA AN HOUR OR TWO LATER. IT APPEARS
THAT GREATEST PERIOD FOR TSRA WILL OCCUR BETWEEN 22Z AND 02Z. I WILL
INCLUDE A CB MENTION AT ALL TAF SITES...WITH TEMPOS FOR ALL SITES
EXCEPT HKY AND AVL. 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. DWPTS WILL LIKELY FALL OVERNIGHT THROUGH MONDAY. FOG
WILL REMAIN LIMITED TO AREAS OF RAINFALL OR WITHIN THE VALLEYS.

OUTLOOK...DRIER CONDITIONS ARE EXPECTED BEHIND A COLD FRONT ON
MONDAY AND 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
SHORT TERM...JPT
LONG TERM...PM
AVIATION...NED
Hazardous weather outlook, Aug 21, 4:01 PM EDT, 3 hours 32 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, 5:34 PM EDT, 1 hour 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
534 PM EDT SUN AUG 21 2011

NCZ504>506-508-212215-
EASTERN MCDOWELL-GREATER BURKE-GREATER RUTHERFORD-MCDOWELL MOUNTAINS-
534 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN MCDOWELL...NORTHEASTERN
RUTHERFORD AND SOUTHWESTERN BURKE COUNTIES THROUGH 615 PM EDT...

AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR NEBO...OR 3 MILES NORTHEAST OF MARION...
MOVING SOUTHEAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  GLENWOOD...
  DYSARTSVILLE...

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

LAT...LON 3582 8198 3581 8199 3577 8194 3579 8190
      3570 8159 3557 8167 3558 8169 3554 8169
      3548 8173 3566 8210 3583 8200

07
Special weather statement, Aug 21, 5:44 PM EDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
544 PM EDT SUN AUG 21 2011

NCZ036-212230-
IREDELL-
544 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL IREDELL COUNTY THROUGH
630 PM EDT...

AT 540 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SCOTTS...OR 6 MILES NORTHWEST OF
STATESVILLE...MOVING EAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  STATESVILLE...
  TROUTMAN...

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

LAT...LON 3589 8070 3586 8070 3566 8077 3576 8109
      3577 8109 3581 8108 3586 8104 3593 8101

07
Special weather statement, Aug 21, 5:48 PM EDT, 1 hour 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
548 PM EDT SUN AUG 21 2011

NCZ072-212215-
CABARRUS-
548 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CABARRUS COUNTY THROUGH
615 PM EDT...

AT 545 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF MOUNT PLEASANT...OR 6 MILES
SOUTHEAST OF CONCORD...MOVING EAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  MOUNT PLEASANT...

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

LAT...LON 3525 8045 3531 8062 3548 8055 3544 8033

07
Special weather statement, Aug 21, 6:09 PM EDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
609 PM EDT SUN AUG 21 2011

GAZ010-017-018-SCZ001-212300-
HABERSHAM-OCONEE MOUNTAINS-RABUN-STEPHENS-
609 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN HABERSHAM...SOUTHERN
RABUN...STEPHENS AND WESTERN OCONEE COUNTIES THROUGH 700 PM EDT...

AT 606 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES SOUTH OF NACOOHE LAKE...OR 8 MILES NORTH
OF CLARKESVILLE...MOVING EAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  LAKE RABUN...
  LAKEMONT...
  TURNERVILLE...
  TALLULAH FALLS...
  LONG CREEK...
  TOCCOA...

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

LAT...LON 3483 8355 3479 8303 3466 8308 3460 8317
      3459 8315 3458 8316 3456 8313 3449 8316
      3448 8318 3467 8363

07
Local storm report, Aug 21, 6:48 PM EDT, 45 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, 10 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

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 20, 10:00 PM EDTSevere Thunderstorm WarningGSPCleveland, Gaston48 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, 7:47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.