Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 643, NWS Greenville-Spartanburg, SC

August 21, 2011Burke County, McDowell County, Rutherford County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 21, 2011, 5:36 PM EDT for Burke County, McDowell County, Rutherford County, North Carolina. It was in force for 54 min. 2 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 21, 2011, 5:36 PM EDT (21:36 UTC)
Expired: Aug 21, 2011, 6:30 PM EDT
In force: 54 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Burke County, NC, McDowell County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 21:36 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

Time	Report	Where	Remark
Aug 21, 5:52 PM EDT	HAIL 0.5	1 Ne Nebo, NC	SOME MARBLE SIZED HAIL FELL BRIEFLY AND SOME GUSTY WIND WITH THE HEAVY RAIN...BUT NOT ENOUGH TO BLOW DOWN ANYTHING.
Aug 21, 5:55 PM EDT	HAIL 1	3 Ne Nebo, NC	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.

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 19 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 12:00Z, 9.6 hours before the alert went out and 172 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

015 
WUUS52 KGSP 212136
SVRGSP
NCC023-111-161-212230-
/O.NEW.KGSP.SV.W.0643.110821T2136Z-110821T2230Z/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MCDOWELL COUNTY IN WESTERN NORTH CAROLINA...
  NORTHEASTERN RUTHERFORD COUNTY IN WESTERN NORTH CAROLINA...
  SOUTHERN BURKE COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 630 PM EDT

* AT 532 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
  LAKE JAMES...OR 4 MILES NORTHEAST OF MARION...MOVING SOUTHEAST AT
  15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEBO...
  GLEN ALPINE AND DYSARTSVILLE...
  MORGANTON...

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 3570 8152 3556 8161 3556 8165 3558 8169
      3547 8170 3568 8210 3584 8200
TIME...MOT...LOC 2137Z 297DEG 11KT 3572 8195

$$
07

2 follow-up statements

768 
WWUS52 KGSP 212207
SVSGSP

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

NCC023-111-161-212230-
/O.CON.KGSP.SV.W.0643.000000T0000Z-110821T2230Z/
MCDOWELL NC-RUTHERFORD NC-BURKE NC-
607 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHERN BURKE...NORTHEASTERN RUTHERFORD AND SOUTHEASTERN
MCDOWELL COUNTIES...

AT 606 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 SOUTHWEST OF GLEN ALPINE...OR 8 MILES SOUTHWEST OF
MORGANTON...MOVING SOUTHEAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DYSARTSVILLE AND PLEASANT GROVE

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 3570 8152 3556 8161 3556 8165 3558 8169
      3547 8170 3562 8198 3579 8184
TIME...MOT...LOC 2207Z 297DEG 11KT 3568 8183

$$

07

620 
WWUS52 KGSP 212226
SVSGSP

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

NCC023-111-161-212236-
/O.EXP.KGSP.SV.W.0643.000000T0000Z-110821T2230Z/
MCDOWELL NC-RUTHERFORD NC-BURKE NC-
626 PM EDT SUN AUG 21 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BURKE...NORTHEASTERN
RUTHERFORD AND SOUTHEASTERN MCDOWELL COUNTIES WILL EXPIRE AT 630 PM
EDT...

THE THUNDERSTORM WEAKENED BELOW SEVERE LIMITS.

LAT...LON 3570 8152 3556 8161 3556 8165 3558 8169
      3547 8170 3562 8198 3579 8184
TIME...MOT...LOC 2226Z 297DEG 11KT 3565 8177

$$

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, 2 hours 53 minutes earlier.

Area forecast discussion, Aug 21, 2:43 PM EDT, 2 hours 53 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, 1 hour 35 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, 2:31 PM EDT, 3 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
231 PM EDT SUN AUG 21 2011

NCZ065-509-510-SCZ003-007-211915-
EASTERN POLK-GREENVILLE MOUNTAINS-HENDERSON-POLK
MOUNTAINS-SPARTANBURG-
231 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN GREENVILLE...
NORTHWESTERN SPARTANBURG...SOUTHERN HENDERSON AND SOUTHERN POLK
COUNTIES THROUGH 315 PM EDT...

AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR TUXEDO...OR 7 MILES SOUTH OF
HENDERSONVILLE...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  NORTH SALUDA RESERVOIR...
  TRYON...
  LANDRUM...

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

LAT...LON 3525 8200 3501 8207 3505 8222 3506 8222
      3506 8224 3515 8257 3532 8251

07

Special weather statement, Aug 21, 2:48 PM EDT, 2 hours 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
248 PM EDT SUN AUG 21 2011

GAZ018-026-028-211930-
FRANKLIN-HART-STEPHENS-
248 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT FRANKLIN...SOUTHEASTERN STEPHENS
AND WESTERN HART COUNTIES THROUGH 330 PM EDT...

AT 243 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES WEST OF CARNESVILLE...MOVING EAST AT 10
MPH.

THIS STORM WILL BE NEAR...
  MARTIN...
  CARNESVILLE...
  CANON...

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

LAT...LON 3426 8313 3423 8317 3424 8325 3430 8338
      3432 8340 3443 8339 3452 8335 3446 8294
      3423 8306 3422 8308

07

Special weather statement, Aug 21, 3:05 PM EDT, 2 hours 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
305 PM EDT SUN AUG 21 2011

SCZ014-211945-
CHESTER-
305 PM EDT SUN AUG 21 2011

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

AT 300 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES NORTHEAST OF CHESTER...MOVING EAST AT 10
MPH.

THIS STORM WILL BE NEAR...
  RICHBURG...

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

LAT...LON 3468 8087 3465 8089 3457 8088 3465 8127
      3482 8124 3482 8089 3479 8087 3477 8086
      3474 8087 3469 8085

07

Special weather statement, Aug 21, 3:35 PM EDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
335 PM EDT SUN AUG 21 2011

SCZ011-019-212015-
ABBEVILLE-GREENWOOD-
335 PM EDT SUN AUG 21 2011

...A STRONG THUNDERSTORM WILL AFFECT GREENWOOD AND SOUTHEASTERN
ABBEVILLE COUNTIES THROUGH 415 PM EDT...

AT 331 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR ABBEVILLE...MOVING EAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  COKESBURY...
  GREENWOOD...

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

LAT...LON 3414 8248 3432 8243 3428 8205 3426 8203
      3398 8210

07

Local storm report, Aug 21, 4:41 PM EDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
441 PM EDT SUN AUG 21 2011

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

0238 PM     HAIL             2 E TUXEDO              35.23N 82.39W
08/21/2011  E0.25 INCH       HENDERSON          NC   TRAINED SPOTTER

            BRIEF PEA-SIZED HAIL AND JUST ENOUGH WIND TO BLOW DOWN A
            COUPLE DEAD LIMBS. STORM WEAKENED AS IT HEADED EAST WITH
            NO HAIL AT SALUDA FIRE DEPARTMENT AND VERY LITTLE WIND.

&&

OUTLAW

Special weather statement, Aug 21, 5:34 PM EDT, 2 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 9:44 PM EDT	Special Weather Statement	GSP	Gaston	46 min
Aug 20, 10:00 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Gaston	48 min
Aug 21, 2:31 PM EDT	Special Weather Statement	GSP	Polk	44 min
Aug 21, 2:35 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk	26 min
Aug 21, 5:34 PM EDT	Special Weather Statement	GSP	McDowell	41 min
Aug 21, 5:44 PM EDT	Special Weather Statement	GSP	Iredell	46 min
Aug 21, 5:48 PM EDT	Special Weather Statement	GSP	Cabarrus	27 min
Aug 21, 6:17 PM EDT	Severe Thunderstorm Warning	GSP	Davie, Iredell, Rowan	58 min
Aug 21, 6:48 PM EDT	Severe Thunderstorm Warning	GSP	Burke, Catawba, Lincoln	57 min
Aug 21, 7:23 PM EDT	Special Weather Statement	GSP	Union	37 min
Aug 21, 7:33 PM EDT	Severe Thunderstorm Warning	GSP	Davie, Iredell, Rowan	57 min
Aug 21, 7:47 PM EDT	Special Weather Statement	GSP	Catawba	43 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011 Every 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.