Damaging Winds in South Carolina, September 5, 2011

Name: Damaging Winds in South Carolina, September 5, 2011
Start: 2011-09-05T18:47
End: 2011-09-05T19:07
Location: South Carolina

September 5, 2011 · NWS GSP · 4 events in 1 county or zone

As the remnants of tropical cyclone Lee moved toward the region, increasing wind shear and instability resulted in a few low topped, rotating thunderstorms. Despite the storms having strong mid-level rotation on radar, only one of them went on to produce a tornado over the North Carolina piedmont.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 4

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GSP wrote it up.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Sep 5, 2:09 PM EST, 4 hours 38 minutes earlier.

Area forecast discussion, Sep 5, 2:09 PM EST, 4 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
309 PM EDT MON SEP 5 2011

.SYNOPSIS...
A STATIONARY FRONT WILL REMAIN ACROSS OUR AREA TONIGHT AS THE
REMNANT TROPICAL LOW TRACKS NORTHEAST SPREADING DEEP MOISTURE OVER
THE CAROLINAS THROUGH TUESDAY.  THE LOW WILL MOVE OUT OF THE AREA
LATER IN THE WEEK AS IT CONTINUES TO WEAKEN.

&&

.NEAR TERM /THROUGH TUESDAY/...
HEAVY RAIN STILL LIKELY OVER PORTIONS OF THE MTNS AND ADJACENT
FOOTHILLS. SVR WX BECOMING THE MAIN THREAT OUTSIDE OF THE MTNS. COLD
FRONT REMAINS STALLED NEAR THE SPINE OF THE APPALACHIANS TONIGHT
WHILE THE REMNANT LOW FROM LEE MOVES NORTHEAST ALONG THE FRONT. MDLS
CONTINUE TO SHOW THE BEST FRONTOGENETICAL AND DEFORMATION ZONE
FORCING REMAINING WEST OF THE SPINE. THAT SAID...PW VALUES ACROSS THE
AREA ARE 2 STANDARD DEVIATIONS ABOVE NORMAL WHILE SLY LOW LEVEL
WINDS IN THE 30 KT RANGE WILL CONTINUE THRU THE NITE.
THEREFORE...THE MOST LIKELY LOCATIONS TO SEE WIDESPREAD HEAVY
RAINFALL WILL BE IN THE PRIME UPSLOPE AREAS ALONG THE BLUE RIDGE AND
NEAR THE TN BORDER CLOSER TO THE BETTER SYNOPTIC FORCING. THE HEAVY
RAIN OUTSIDE OF THOSE AREAS WILL LIKELY BE MORE ISOLATED AND
CONFINED TO LOCATIONS THAT SEE REPEATED CONVECTION AND/OR OVER MORE
URBAN ARES. WILL LEAVE THE FLOOD WATCHES AS IS...BUT INDICATE THE
NEW THINKING IN THE WORDING. WHILE THE FLOOD THREAT HAS
DIMINISHED...THE SEVERE CHANCES HAVE INCREASED. HEATING OUTSIDE OF
THE MTNS HAS LEAD TO MODERATE INSTABILITY ALONG AND SOUTH OF I-85.
BULK SHEAR AND HELICITY VALUES REMAIN QUITE HEIGHT. THIS COMBINED
WITH LOW LCL HEIGHTS WILL LEAD TO A SIGNIFICANT TORNADO THREAT
THROUGH THE EVENING AND POSSIBLY OVERNIGHT.

COLD FRONT BEGINS TO MOVE TUESDAY AS THE LOW MOVES ALONG THE FRONT
AND INTO OUR AREA. DRY SLOT MOVES IN BEHIND THE FRONT HELPING TO END
HEAVY PRECIP FROM WEST TO EAST ACROSS THE AREA OUTSIDE OF THE MTNS
DURING THE MORNING. HEAVY RAIN COULD LINGER ACROSS THE MTNS...AT
LEAST THRU THE MORNING. STRONG SLY LOW LEVEL FLOW AND MODERATE
INSTABILITY WILL CONTINUE AHEAD OF THE FRONT. THEREFORE...LOCATIONS
AHEAD OF THE FRONT WILL RETAIN A TORNADO THREAT UNTIL THE FRONT
MOVES EAST OF THE AREA DURING THE LATE AFTERNOON. EXPECT THE HEAVY
RAIN THREAT AND PRECIP TO DIMINISH ACROSS THE MTNS DURING THE
AFTERNOON WITH THE SVR THREAT DIMINISHING AS WELL.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
AS OF 230 PM MONDAY...12Z GFS AND NAM IN GOOD AGREEMENT THAT REMNANT
LOW FROM ONCE TS LEE WILL BE OVER THE WESTERN CAROLINAS AT 00Z WED
WITH A CONVERGENCE ZONE EAST OF THE CENTER. EXPECT THAT A CONVECTIVE
LINE OF STORMS ASSOCIATED WITH THE CONVERGENCE AREA WILL BE JUST
EAST OF THE FORECAST AREA AT THE BEGINNING OF THE PERIOD WITH THE
AREA EAST OF THE MOUNTAINS DRY SLOTTED. HENCE EXPECT ONLY SOME
SCATTERED SHOWERS OVER THE MOUNTAINS AS THE SURFACE LOW MOVES
SLOWLY NE TUE NIGHT. THE UPPER LOW WEST OF THE MOUNTAINS IS
EXPECTED TO MOVE ONLY VERY SLOWLY NORTHWARD INTO THE LOWER OHIO
VALLEY BY THU. LOOKS LIKE A PERSISTENT DOWNSLOPE FLOW AND A DRYING
AIRMASS WILL PRECLUDE ANY SHOWERS OUTSIDE OF THE MOUNTAINS BOTH
WED AND THU. ENOUGH MOISTURE SHOULD REMAIN OVER THE MOUNTAINS FOR
WIDELY SCATTERED TO SCATTERED SHOWERS THROUGH THE PERIOD. THE
SHOWERS WILL BE DIURNALLY ENHANCED EACH AFTERNOON...AND UPSLOPE
AREAS COULD SEE A SHOWER ANY TIME. CONSIDERABLE CLOUDINESS ON WED
WILL TEMPER MAX TEMPS AND KEEP THEM BELOW AVERAGE...BUT WITH
INCREASING SUNSHINE ON THU EXPECT MAX TEMPS SHOULD TOP OUT NEAR
AVERAGE VALUES.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
AS OF 1 PM MONDAY...THE EXTENDED PORTION OF THE FORECAST LEANED
HEAVILY ON THE HPC/ECMWF FORECAST. THE REMNANT UPPER LOW PREVIOUSLY
ASSOCIATED WITH TS LEE IS FORECAST TO CONTINUE TO MEANDER ACROSS THE
TN VALLEY THROUGH THE END OF THE WEEK AND THEN GRADUALLY MOVE
EASTWARD AND SLOWLY FILL ACROSS THE SOUTHERN APPALACHIANS THE
FIRST OF NEXT WEEK. PERSISTENT...BUT GENERALLY WEAK DOWNSLOPE FLOW
EAST OF THE MOUNTAINS THROUGH SUNDAY...AND A MID LEVEL INVERSION
SUGGESTS GENERALLY DRY WEATHER IN THE PIEDMONT AREAS WITH ENHANCED
CU FIELDS DURING THE AFTERNOON HOURS. IN THE
MOUNTAINS...SUFFICIENT MOISTURE AND LAPSE RATES SHOULD EXIST FOR
SOME LOW TOPPED SHOWERS TO DEVELOP DIURNALLY EACH AFTERNOON. ON
MONDAY...WITH THE UPPER TROUGH MOVING EASTWARD ACROSS THE
AREA...SCATTERED AFTERNOON SHOWERS POSSIBLE ALL AREAS.
TEMPERATURES THROUGH THE PERIOD WILL AVERAGE ABOUT A CATEGORY
BELOW SEASONAL NORMS.

&&

.AVIATION /19Z MONDAY THROUGH SATURDAY/...
AT KCLT AND ELSEWHERE...CONDITIONS OUTSIDE OF THE MTNS HAVE NOT BEEN
AS DIRE AS PREV FCST AS RAIN HAS BEEN SPOTTY. THAT SAID...PRECIP IS
EXPECTED TO BECOME WIDESPREAD LATER THIS AFTERNOON OR EARLY EVENING
WITH AT LEAST MVFR CONDITIONS EXPECTED. CONDITIONS DETERIORATE INTO
THE IFR RANGE THIS EVENING OR OVERNIGHT AS PRECIP...LOW LEVEL
MOISTURE AND UPSLOPE FLOW CONTINUE. CONDITIONS SHUD IMPROVE OUTSIDE
OVER THE WRN NON-MTN SITES AFTER DAYBREAK AS PRECIP SLOWLY COMES TO
AN END. LOW CONDITIONS COULD CONTINUE AT KCLT/KAVL THRU THE END OF
THE PERIOD. S TO SE WINDS WILL CONTINUE THRU THE NITE WITH LOW END
GUSTS FROM TIME TO TIME. THIS COULD CAUSE SOME LOW LEVEL WIND SHEAR
PROBLEMS. WINDS REMAIN S TO SW TUE MORNING WITH LOW END GUSTS
POSSIBLE AGAIN.

OUTLOOK...CONDITIONS SHOULD IMPROVE DURING THE AFTERNOON AS DRY SLOT
WORKS IN FROM THE WEST...HOWEVER CLOUDS COULD LINGER OVER THE MTNS.
THE FORECAST FOR MID-WEEK IS VERY UNCERTAIN DUE TO LOW CONFIDENCE IN
THE EVENTUAL PROGRESSION OF A REMNANT LOW.

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...FLASH FLOOD WATCH THROUGH WEDNESDAY MORNING FOR GAZ010-017-018-
     026-028-029.
NC...FLASH FLOOD WATCH THROUGH WEDNESDAY MORNING FOR NCZ033-035>037-
     048>053-056>059-062>065-068>072-082-501>510.
SC...FLASH FLOOD WATCH THROUGH WEDNESDAY MORNING FOR SCZ001>010.

&&

SYNOPSIS...DEO
NEAR TERM...RWH
SHORT TERM...LG
LONG TERM...LG
AVIATION...RWH

Hazardous weather outlook, Sep 5, 3:10 PM EST, 3 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
410 PM EDT MON SEP 5 2011

GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-501>510-
SCZ001>010-062015-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-
DAVIE-CATAWBA-ROWAN-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-
410 PM EDT MON SEP 5 2011

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...
...TORNADO WATCH 840 IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.
   FLASH FLOOD WATCH.

A SLOW MOVING FRONT NEAR THE NORTH CAROLINA AND TENNESSEE BORDER
WILL MOVE INTO THE WESTERN CAROLINAS AND NORTHEAST GEORGIA ON TUESDAY.
LOW PRESSURE...THE REMNANT OF TROPICAL DEPRESSION LEE...WILL MOVE
NORTHEAST ALONG THE FRONT. AS THE LOW APPROACHES...THE ENVIRONMENT
WILL BECOME INCREASINGLY SUPPORTIVE FOR HEAVY RAIN AND POSSIBLY
SOME ISOLATED SEVERE THUNDERSTORMS. THE MAIN THREAT WILL BE
DAMAGING WINDS AND TORNADOES. HEAVY RAINFALL COULD PRODUCE SOME
LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

ALSO...THERE WILL BE A CONTINUING THREAT OF SEVERE STORMS ON TUESDAY EAST
OF THE MOUNTAINS AS A FRONT MOVES ACROSS THE AREA. A CONVECTIVE
LINE OF STORMS IS LIKELY TO DEVELOP BY MIDDAY AND MOVE EAST THE
AREA BY EVENING. ISOLATED TORNADOES AND DAMAGING WINDS WILL BE THE
MAIN THREATS. SEVERE WEATHER AND HEAVY RAIN WILL END BY TUESDAY
NIGHT.

OTHERWISE...NO SIGNIFICANT WEATHER IS EXPECTED.

NONE.

SCZ011>014-019-062015-
ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
410 PM EDT MON SEP 5 2011

...TORNADO WATCH 840 IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR UPSTATE SOUTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.

A SLOW MOVING FRONT NEAR THE NORTH CAROLINA AND TENNESSEE BORDER
WILL MOVE INTO THE WESTERN CAROLINAS AND NORTHEAST GEORGIA ON
TUESDAY. LOW PRESSURE...THE REMNANT OF TROPICAL DEPRESSION LEE...WILL
MOVE NORTHEAST ALONG THE FRONT. AS THE LOW APPROACHES...THE
ENVIRONMENT WILL BECOME INCREASINGLY SUPPORTIVE OF SEVERE
THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE MAIN THREAT WILL BE
DAMAGING WINDS AND TORNADOES. IN ADDITION...EXCESSIVE RAINFALL MAY
RESULT IN POSSIBLE FLOODING OF SMALL STREAMS AND CREEKS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THERE WILL BE A CONTINUING THREAT OF SEVERE STORMS ON TUESDAY EAST
OF THE MOUNTAINS AS A FRONT MOVES ACROSS THE AREA. A CONVECTIVE
LINE OF STORMS IS LIKELY TO DEVELOP BY MIDDAY AND MOVE EAST THE
AREA BY EVENING. ISOLATED TORNADOES AND DAMAGING WINDS WILL BE THE
MAIN THREATS. SEVERE WEATHER AND HEAVY RAIN WILL END BY TUESDAY
NIGHT.

OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

NCZ033-048>053-058-059-062>064-062015-
AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM-
NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-
410 PM EDT MON SEP 5 2011

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

A STALLED COLD FRONT NEAR THE NORTH CAROLINA AND TENNESSEE BORDER
WILL REMAIN OVER THE AREA THROUGH TUESDAY NIGHT. THE CENTER OF LOW
PRESSURE...THE REMNANT OF TROPICAL DEPRESSION LEE...WILL MOVE
NORTHEAST ALONG THE FRONT. AS THE LOW APPROACHES...THE ENVIRONMENT
WILL BECOME INCREASINGLY SUPPORTIVE OF SEVERE THUNDERSTORMS THIS
AFTERNOON AND TONIGHT. THE MAIN THREAT WILL BE DAMAGING WINDS AND
TORNADOES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

HEAVY RAIN WILL END ON TUESDAY. OTHERWISE...NO SIGNIFICANT WEATHER
IS EXPECTED.

NONE.

NCZ065-062015-
HENDERSON-
410 PM EDT MON SEP 5 2011

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...
...TORNADO WATCH 840 IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.
   FLASH FLOOD WATCH.

A STALLED COLD FRONT NEAR THE NORTH CAROLINA AND TENNESSEE BORDER
WILL REMAIN OVER THE AREA THROUGH TUESDAY NIGHT. THE CENTER OF LOW
PRESSURE...THE REMNANT OF TROPICAL DEPRESSION LEE...WILL MOVE
NORTHEAST ALONG THE FRONT. AS THE LOW APPROACHES...THE ENVIRONMENT
WILL BECOME INCREASINGLY SUPPORTIVE OF SEVERE THUNDERSTORMS THIS
AFTERNOON AND TONIGHT. THE MAIN THREAT WILL BE DAMAGING WINDS AND
TORNADOES.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

ALSO...THERE WILL BE A CONTINUING THREAT OF SEVERE STORMS ON
TUESDAY EAST OF THE MOUNTAINS AS A FRONT MOVES ACROSS THE AREA. A
CONVECTIVE LINE OF STORMS IS LIKELY TO DEVELOP BY MIDDAY AND MOVE
EAST THE AREA BY EVENING. ISOLATED TORNADOES AND DAMAGING WINDS
WILL BE THE MAIN THREATS. SEVERE WEATHER AND HEAVY RAIN WILL END
BY TUESDAY NIGHT.

OTHERWISE...NO SIGNIFICANT WEATHER IS EXPECTED.

In the hours before

Special weather statement, Sep 5, 5:06 PM EST, 1 hour 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
606 PM EDT MON SEP 5 2011

SCZ009-014-052245-
CHESTER-YORK-
606 PM EDT MON SEP 5 2011

...A STRONG THUNDERSTORM WILL AFFECT CHESTER AND SOUTHEASTERN YORK
COUNTIES THROUGH 645 PM EDT...

AT 606 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES NORTHWEST OF CORNWELL...OR 6 MILES SOUTH
OF CHESTER...MOVING NORTHEAST AT 35 MPH.

THIS STORM WILL BE NEAR...
  CHESTER...
  RICHBURG...
  CATAWBA...
  ROCK HILL...

PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM. TORRENTIAL RAINFALL CAN BE EXPECTED AS WELL.

LAT...LON 3482 8089 3480 8088 3455 8115 3456 8122
      3464 8134 3509 8097 3511 8094 3506 8089
      3501 8090 3495 8086 3484 8086

HG

Special weather statement, Sep 5, 5:19 PM EST, 1 hour 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
619 PM EDT MON SEP 5 2011

SCZ002>007-010>012-052315-
ABBEVILLE-ANDERSON-GREATER GREENVILLE-GREATER OCONEE-GREATER
PICKENS-GREENVILLE MOUNTAINS-LAURENS-PICKENS MOUNTAINS-SPARTANBURG-
619 PM EDT MON SEP 5 2011

...STRONG THUNDERSTORMS WILL AFFECT ANDERSON...GREENVILLE...
NORTHEASTERN ABBEVILLE...PICKENS...SOUTHEASTERN OCONEE...SPARTANBURG
AND WESTERN LAURENS COUNTIES THROUGH 715 PM EDT...

AT 619 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES SOUTHEAST OF
TOWNVILLE TO WATERLOO...MOVING NORTH AT 40 MPH.

THESE STORMS WILL BE NEAR...
  PENDLETON...
  WILLIAMSTON...
  GRAY COURT...
  PIEDMONT...
  DONALDSON CENTER...
  WHITE HORSE ROAD AT I-85...

PEA SIZE HAIL AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS. IN ADDITION...HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3434 8217 3441 8224 3437 8230 3451 8298
      3507 8283 3508 8278 3507 8276 3510 8269
      3513 8268 3512 8266 3516 8255 3517 8245
      3516 8245 3521 8239 3518 8237 3520 8228
      3510 8183 3503 8179 3430 8199

HG

Special weather statement, Sep 5, 5:37 PM EST, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
637 PM EDT MON SEP 5 2011

SCZ009-014-052315-
CHESTER-YORK-
637 PM EDT MON SEP 5 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CHESTER AND
SOUTHEASTERN YORK COUNTIES THROUGH 715 PM EDT...

AT 632 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR EDGEMOOR...OR 11 MILES SOUTH OF ROCK HILL...
MOVING NORTHEAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  CATAWBA...
  ROCK HILL...
  FORT MILL...

PEA SIZE HAIL AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM. IN ADDITION...HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3482 8089 3479 8087 3477 8087 3468 8096
      3478 8114 3509 8092 3506 8089 3501 8090
      3495 8086 3484 8086

HG

Special weather statement, Sep 5, 6:00 PM EST, 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
700 PM EDT MON SEP 5 2011

NCZ082-060000-
UNION-
700 PM EDT MON SEP 5 2011

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

AT 700 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES EAST OF CATAWBA...OR 9 MILES NORTH OF
LANCASTER...MOVING NORTHEAST AT 30 MPH.

THIS STORM WILL BE NEAR...
  WAXHAW...
  MINERAL SPRINGS...
  MONROE...
  WINGATE...
  UNIONVILLE...
  MARSHVILLE...

PEA SIZE HAIL AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM. IN ADDITION..HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3503 8029 3481 8068 3481 8079 3482 8080
      3494 8079 3498 8082 3520 8053 3517 8044
      3518 8037 3517 8035 3519 8029 3517 8027

HG

Special weather statement, Sep 5, 6:26 PM EST, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
726 PM EDT MON SEP 5 2011

SCZ013-014-060015-
CHESTER-UNION-
726 PM EDT MON SEP 5 2011

...STRONG THUNDERSTORMS WILL AFFECT CHESTER AND EASTERN UNION
COUNTIES THROUGH 815 PM EDT...

AT 726 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES EAST OF
BLACKSTOCK TO 6 MILES SOUTH OF CARLISLE...MOVING NORTH AT 50 MPH.

THESE STORMS WILL BE NEAR...
  CARLISLE...
  SANTUC...
  CHESTER...
  LOCKHART...
  LOWRYS...

PEA SIZE HAIL AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS. IN ADDITION...HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3447 8156 3450 8160 3486 8154 3486 8148
      3484 8146 3482 8147 3482 8090 3454 8098
      3456 8141 3456 8142 3450 8141 3448 8149
      3444 8155

HG

Special weather statement, Sep 5, 6:32 PM EST, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
732 PM EDT MON SEP 5 2011

NCZ507>510-060015-
EASTERN POLK-GREATER RUTHERFORD-POLK MOUNTAINS-RUTHERFORD MOUNTAINS-
732 PM EDT MON SEP 5 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN RUTHERFORD AND POLK
COUNTIES THROUGH 815 PM EDT...

AT 733 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MILL SPRING...OR 4 MILES NORTH OF
COLUMBUS...MOVING NORTHEAST AT 35 MPH.

THIS STORM WILL BE NEAR...
  CHIMNEY ROCK...
  LAKE LURE...
  THERMAL CITY...

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. IN
ADDITION...HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3552 8197 3554 8188 3521 8214 3530 8233
      3539 8226 3540 8227 3552 8219 3553 8217
      3552 8214 3553 8209 3553 8203 3555 8201

HG

The radar

The Greer radar (KGSP), 91 km away, was scanning. The volume nearest the first event began at 23:47 UTC.

Open the radar archive at this moment

Event by event

4 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, York

When: September 5, 6:47 PM EST
Where: York County, Mc Connells
Measured: 50 kt (58 mph) estimated gust
Reported by: County Official
Coordinates: 34.870, -81.220

A tree was down down in McConnells.

Thunderstorm Wind, York

When: September 5, 6:47 PM EST
Where: York County, 2.65 mi WSW of York
Measured: 50 kt (58 mph) estimated gust
Reported by: County Official
Coordinates: 34.980, -81.270

A tree was blown down at Kelly Rd and highway 49 about two miles west of York.

Thunderstorm Wind, York

When: September 5, 7:07 PM EST
Where: York County, 0.69 mi N of Boyd Hill
Measured: 50 kt (58 mph) estimated gust
Reported by: County Official
Coordinates: 34.940, -81.030

A tree was blown down in Rock Hill.

Thunderstorm Wind, York

When: September 5, 7:07 PM EST
Where: York County, 4.48 mi NNE of Rock Hill Bryant Arp
Measured: 50 kt (58 mph) estimated gust
Reported by: County Official
Coordinates: 35.040, -81.020

A tree was blown down in Tega Cay.

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in South Carolina in 2011 Every state in 2011 This day in weather history Warnings in South Carolina, September 2011

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 347262, 347263, 347268, 347269.