Heavy rain from slow moving thunderstorms caused a stream to flood a road in the western piedmont of North Carolina.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS GSP wrote it up.
Heavy rain from slow moving thunderstorms caused a stream to flood a road in the western piedmont of North Carolina.
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 Aug 12, 1:18 PM EST, 1 hour 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 218 PM EDT FRI AUG 12 2011 .SYNOPSIS... HIGH PRESSURE WILL MOVE OFF THE EAST COAST BY SATURDAY. A COLD FRONT WILL THEN APPROACH THE AREA FROM THE NORTHWEST AND MOVE ACROSS THE CAROLINAS EARLY SUNDAY. HIGH PRESSURE WILL BUILD IN FROM THE NORTH EARLY NEXT WEEK. && .NEAR TERM /THROUGH SATURDAY/... ALTHOUGH SHOWERS WERE QUICK TO DEVELOP THIS MORNING...OTHER CONVECTION HAS REMAINED ISOLATED EXCEPT FOR THE ERN UPSTATE AND THE NRN BLUE RIDGE. STILL...GIVEN THE MODERATE INSTABILITY AND WEAK SHORT WAVE MOVING THRU EXPECT MAINLY SCT COVERAGE AS STORMS FORM ALONG THE BLUE RIDGE THEN MOVE SOUTH AND EAST ACROSS THE FOOTHILLS AND PIEDMONT. EFFECTIVE SHEAR VALUES ARE AROUND 30 KTS WITH DCAPE AROUND 1000 J/KG. THEREFORE...A THREAT OF ISOLATED SEVERE DOWNBURSTS REMAINS UNTIL THIS EVENING WHEN CONVECTION DIMINISHES WITH LOSS OF HEATING. THE LOW LEVEL E TO SE FLOW COULD HELP PRODUCE SOME ISOLATED AREAS OF EXCESSIVE RAINFALL AS WELL. LOW LEVEL MOISTURE AND E TO SE FLOW WILL CONTINUE OVERNIGHT WITH COULD KEEP ISOLATED SHOWERS GOING. AT THE LEAST...A DECK OF LOW CLOUDS SHOULD FORM AND MOVE INTO THE AREA IN THE FLOW. AREAS OF FOG COULD DEVELOP AS WELL. LOWS SHOULD BE NEAR NORMAL. SATURDAY...EXPECT SHOWERS TO START EARLY AGAIN AS THE CONTINUED SELY FLOW ACTS ON LINGERING LOW LEVEL MOISTURE. OVERALL CONVECTION COULD BE MORE WIDESPREAD AS SOME ADDITIONAL UPPER LEVEL ENERGY MOVES IN. HAVE KEPT POP LIMITED TO SOLID CHC FOR NOW. HIGHS SHOULD BE JUST ON THE LOW SIDE OF NORMAL. && .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY NIGHT/... AT 2 PM EDT FRIDAY...AN UPPER TROUGH WILL AMPLIFY ALONG THE EASTERN SEABOARD FROM SATURDAY NIGHT THROUGH SUNDAY NIGHT...THEN WILL DEAMPLIFY SLIGHTLY ON MONDAY. A COLD FRONT WILL CROSS OUR AREA FROM THE NORTHWEST LATE SATURDAY NIGHT AND EARLY SUNDAY...ACCOMPANIED BY SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. MODERATE INSTABILITY AND SHEAR WILL ACCOMPANY THE FRONTAL PASSAGE. THE SLOW MOVING NATURE OF THE BOUNDARY...COMBINED WITH A WEAK PRECEDING SOUTHERLY UPSLOPE FLOW...WILL FAVOR RAINFALL AMOUNTS IN EXCESS OF ONE INCH...AND PERHAPS TWO INCHES IN THE MOUNTAINS. AS WINDS VEER TO THE NORTHWEST...UPSLOPE FLOW SHOWERS WILL SET UP IN THE NC MOUNTAINS BORDERING TN LATE SUNDAY INTO SUNDAY NIGHT...ENDING MONDAY AS DRY HIGH PRESSURE BUILDS EAST INTO THE MOUNTAINS. TEMPERATURES WILL RUN NEAR NORMAL SATURDAY NIGHT...THEN BELOW NORMAL FORM SUNDAY THROUGH MONDAY. && .LONG TERM /TUESDAY THROUGH FRIDAY/... AT 2 PM EDT FRIDAY...AN UPPER TROUGH WILL BE ALONG THE EAST COAST ON MONDAY NIGHT AND TUESDAY. HEIGHTS RISE TEMPORARILY ON WEDNESDAY BETWEEN SHORTWAVES MOVING THROUGH THE MEAN TROUGH...THEN FALL LATE IN THE WEEK AS A CLOSED UPPER LOW MOVES ACROSS SOUTHERN CANADA...CAUSING THE TROUGH AXIS TO RETROGRADE INTO THE APPALACHIANS. A SLOW MOVING COLD FRONT WILL BE NEAR THE COAST ON TUESDAY...WHILE RELATIVELY COOL AND DRY HIGH PRESSURE BUILDS EAST ACROSS THE MOUNTAINS. THIS HIGH CROSSES THE MOUNTAINS ON WEDNESDAY...THEN REMAINS ALONG THE EAST COAST THROUGH FRIDAY. PRECIPITATION WILL BE QUITE LIMITED IN THIS HIGH PRESSURE...AND MAINLY CONFINED TO THE BLUE RIDGE ESCARPMENT DIFFERENTIAL HEATING AND LIGHT UPSLOPE FLOW COME INTO PLAY. TEMPERATURES WILL BE CLOSE TO LATE SUMMER OR EARLY AUTUMN NORMAL. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... AT KCLT AND ELSEWHERE...LARGE AREA OF CONVECTION SHOULD REMAIN SOUTH OF KCLT EARLY THIS AFTERNOON...BUT ADDITIONAL CONVECTION EXPECTED LATER. NO CELLS ARE CURRENTLY LOOMING OVER A TAF SITE...SO JUST KEPT CB MENTION FOR NOW. EXPECT A GENERAL E TO SE WIND THIS AFTERNOON THEN LIGHT AND VARIABLE TO CALM OVERNIGHT. CONVECTION SHOULD DIMINISH WITH LOSS OF HEATING BUT WEAK UPSLOPE FLOW AND LOW LEVEL MOISTURE COULD KEEP LINGERING SHOWERS THRU THE NITE. MVFR FOG LIKELY MOST LOCATIONS TOWARD MORNING...WITH LIFR AT KAVL. FOG AND CLOUDS WILL LIFT BY MID MORNING...BUT SHOWERS WILL BE ON THE INCREASE AGAIN EARLY WITH THE CONTINUED MOISTURE AND FLOW. DID NOT MENTION ANY CB FOR SAT...BUT IT WILL BE NEEDED AT SOME POINT. LIGHT SELY WINDS EXPECTED BY MID MORNING. OUTLOOK...CHANCE TSTMS INCREASES SAT NITE-SUN AS A COLD FRONT MOVES THRU. EXPECT DRIER WEATHER MON-WED. 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...TJB NEAR TERM...RWH SHORT TERM...JAT LONG TERM...JAT AVIATION...RWH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1106 AM EDT FRI AUG 12 2011 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-131515- 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- 1106 AM EDT FRI AUG 12 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. SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE AREA THIS AFTERNOON AND CONTINUE INTO THE EVENING. SOME OF THESE STORMS COULD BECOME SEVERE...CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS. ISOLATED AREAS OF HEAVY RAINFALL COULD ALSO DEVELOP... ESPECIALLY IN LOCATIONS WHERE MULTIPLE STORMS MOVE THROUGH. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. A COLD FRONT WILL MOVE ACROSS THE AREA LATER THIS WEEKEND. SCATTERED TO NUMEROUS THUNDERSTORMS IN ADVANCE OF THIS FRONT ARE EXPECTED SATURDAY AFTERNOON THROUGH SUNDAY. SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS...LARGE HAIL...AND HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... NONE.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1117 AM EDT FRI AUG 12 2011
SCZ012-013-121600-
LAURENS-UNION-
1117 AM EDT FRI AUG 12 2011
...A STRONG THUNDERSTORM WILL AFFECT EASTERN LAURENS AND WESTERN
UNION COUNTIES THROUGH NOON EDT...
AT 1115 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHEAST OF LAURENS...MOVING EAST AT 10
MPH.
* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO SEDALIA...
LAURENS...JOANNA AND CLINTON.
VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.
LAT...LON 3437 8205 3455 8209 3460 8189 3459 8187
3458 8187 3461 8185 3464 8173 3446 8169
3444 8173 3439 8176
07PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1238 PM EDT FRI AUG 12 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0249 PM TSTM WND DMG 2 ENE CASAR 35.52N 81.58W
08/11/2011 CLEVELAND NC PUBLIC
TWO TREES DOWN ON HWY 10 IN BETWEEN CASAR AND TOLUCA.
&&
ZHARGROVSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1251 PM EDT FRI AUG 12 2011
SCZ013-121730-
UNION-
1251 PM EDT FRI AUG 12 2011
...A STRONG THUNDERSTORM WILL AFFECT NORTHERN UNION COUNTY THROUGH
130 PM EDT...
AT 1245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES WEST OF BUFFALO...OR 8 MILES WEST OF
UNION...MOVING EAST AT 10 MPH.
THIS STORM WILL BE NEAR...
BUFFALO...
JONESVILLE...
UNION...
VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.
LAT...LON 3462 8184 3465 8184 3468 8182 3482 8179
3488 8151 3487 8150 3475 8147 3473 8149
3472 8147 3464 8145
07SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
110 PM EDT FRI AUG 12 2011
SCZ014-121800-
CHESTER-
110 PM EDT FRI AUG 12 2011
...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CHESTER COUNTY
THROUGH 200 PM EDT...
AT 106 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTH OF RICHBURG...OR 12 MILES SOUTHEAST
OF CHESTER...MOVING EAST AT 5 MPH.
THIS STORM WILL BE NEAR...
GREAT FALLS...
VERY HEAVY RAINFALL...SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH
ARE EXPECTED WITH THIS STORM.
LAT...LON 3468 8087 3465 8089 3455 8087 3454 8088
3454 8097 3455 8106 3455 8115 3471 8113
3471 8086 3469 8085
07SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
311 PM EDT FRI AUG 12 2011
SCZ009-122000-
YORK-
311 PM EDT FRI AUG 12 2011
...A STRONG THUNDERSTORM WILL AFFECT YORK COUNTY THROUGH 400 PM
EDT...
AT 305 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHEAST OF YORK...MOVING NORTHEAST AT
15 MPH.
THIS STORM WILL BE NEAR...
ROCK HILL...
CATAWBA...
TEGA CAY...
FORT MILL...
SMALL HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.
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 3482 8104 3497 8142 3516 8112
3515 8109 3512 8104 3509 8106 3505 8104
3509 8096 3506 8089 3501 8090 3495 8086
3484 8086
ARKThe Columbia radar (KCAE), 132 km away, was scanning. The volume nearest the first event began at 20:10 UTC.
1 flash flood. Local standard time, as filed.
Meadow Branch creek overflowed its banks, flooding McIntyre Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2011Every state in 2011This day in weather historyWarnings in North Carolina, August 2011
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: 344616.