Alert archive / North Carolina / Flash Flood Warnings in 2011

Flash Flood Warning 22, NWS Greenville-Spartanburg, SC

September 23, 20115 counties in North Carolina; York County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Sep 23, 2011, 9:33 AM EDT for 5 counties in North Carolina; York County, South Carolina. It was in force for 3 hr. 3 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
Sep 23, 2011, 9:33 AM EDT (13:33 UTC)
Expired
Sep 23, 2011, 12:30 PM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Cabarrus County, NC, Iredell County, NC, Mecklenburg County, NC, Rowan County, NC, Union County, NC, York County, SC

The radar

The Greer radar (KGSP), 130 km from the middle of the area, began a volume at 13:36 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

TimeReportWhereRemark
Sep 23, 10:00 AM EDTFLASH FLOOD3 Se Charlotte, NCMCMULLEN CREEK IS FLOODING ADDISON DRIVE. FLOODING VERIFIED WITH WEBCAM.
Sep 23, 10:20 AM EDTFLASH FLOOD3 E Charlotte, NCBRIAR CREEK FLOODING SHAMROCK DRIVE. VERIFIED WITH WEBCAM.
Sep 23, 10:40 AM EDTFLASH FLOOD2 Sw Stallings, NCREPORT OF CHESTNUT LANE FLOODED BY CREEK IN THE STALLINGS AREA.

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 3 storm reports to this flash flood warning; the first came 27 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, 1.6 hours before the alert went out and 133 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 2011-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 120 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°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 2011-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.19395878Sfc1 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
120 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
494 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
86 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.

646 
WGUS52 KGSP 231333
FFWGSP
NCC025-097-119-159-179-SCC091-231630-
/O.NEW.KGSP.FF.W.0022.110923T1333Z-110923T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
933 AM EDT FRI SEP 23 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CABARRUS COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  EASTERN YORK COUNTY IN UPSTATE SOUTH CAROLINA...
  MECKLENBURG COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  ROWAN COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  SOUTHEASTERN IREDELL COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  WESTERN UNION COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 1230 PM EDT

* AT 929 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
  AREA OF VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RAINFALL RATES 
  WERE 1 TO 1.5 INCHES PER HOUR.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CENTER CITY CHARLOTTE...CONCORD...ROCK HILL...SALISBURY...UNC
  CHARLOTTE...CAROWINDS...CATAWBA...CHARLOTTE MOTOR SPEEDWAY...CHINA
  GROVE...CLEVELAND...CORNELIUS...DAVIDSON...EASTLAND MALL...
  ENOCHVILLE...FAIRVIEW...FORT MILL...GRANITE QUARRY...HARRISBURG...
  HIGH ROCK LAKE...HUNTERSVILLE...I-77 AT I-85...KANNAPOLIS...LAKE
  WYLIE...LANDIS...MATTHEWS...MIDLAND...MINERAL SPRINGS...MINT
  HILL...MOORESVILLE AND MOUNT PLEASANT.

* BRIAR CREEK AND LITTLE SUGAR CREEK IN CHARLOTTE WERE RISING        
  RAPIDLY AND ARE LIKELY TO FLOOD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

TO REPORT HIGH WATER...FLOODING...MUDSLIDES...LANDSLIDES OR OTHER
SEVERE WEATHER THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL
FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3481 8073 3483 8080 3494 8079 3505 8089
      3501 8090 3495 8086 3484 8087 3490 8117
      3515 8106 3516 8101 3526 8102 3535 8098
      3536 8092 3537 8097 3581 8078 3567 8030
      3562 8024

$$
LG
3 follow-up statements
935 
WGUS72 KGSP 231434
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1034 AM EDT FRI SEP 23 2011

NCC025-097-119-159-179-SCC091-231630-
/O.CON.KGSP.FF.W.0022.000000T0000Z-110923T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CABARRUS NC-IREDELL NC-MECKLENBURG NC-UNION NC-ROWAN NC-YORK SC-
1034 AM EDT FRI SEP 23 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ROWAN...WESTERN UNION...
MECKLENBURG...SOUTHEASTERN IREDELL AND CABARRUS COUNTIES IN THE
PIEDMONT OF NORTH CAROLINA...AND EASTERN YORK COUNTY IN UPSTATE SOUTH
CAROLINA UNTIL 1230 PM EDT...

AT 1030 AM EDT...RAIN GAUGES INDICATED THAT 2 TO 3 INCHES OF RAIN 
HAD FALLEN OVER THE PAST TWO HOURS ACROSS ACROSS PARTS OF CENTRAL 
AND EASTERN MECKLENBURG COUNTY...AS WELL AS NORTHWEST UNION COUNTY. 
MCMULLEN CREEK AT ADDISON DRIVE...AND BRIAR CREEK AT SHAMROCK DRIVE 
WERE BOTH IN FLOOD. AND BRIAR CREEK WAS ABOUT TO FLOOD INDEPENDENCE 
BLVD. 

HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA. RUNOFF FROM THIS
EXCESSIVE RAINFALL WILL CAUSE ADDITIONAL FLASH FLOODING TO OCCUR. IN 
PARTICULAR...ADDITIONAL FLOODING IS LIKELY TO OCCUR ALONG PARTS OF 
LITTLE SUGAR CREEK...BRIAR CREEK AND MCMULLEN CREEK IN CENTRAL 
MECKLENBURG COUNTY. FLOODING HAS NOT BEEN REPORTED OUTSIDE OF THIS 
AREA YET...BUT MAY ALSO DEVELOP SHORTLY OVER NORTHWESTERN UNION 
COUNTY AND SOUTHWEST AND CENTRAL CABARRUS COUNTY WHERE 1 TO 2 INCHES 
OF RAIN HAS FALLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE MINOR FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
GREENVILLE-SPARTANBURG.

&&

LAT...LON 3481 8073 3483 8080 3494 8079 3505 8089
      3501 8090 3495 8086 3484 8087 3490 8117
      3515 8106 3516 8101 3526 8102 3535 8098
      3536 8092 3537 8097 3581 8078 3567 8030
      3562 8024

$$

MCAVOY
665 
WGUS72 KGSP 231542
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1142 AM EDT FRI SEP 23 2011

NCC097-SCC091-231547-
/O.CAN.KGSP.FF.W.0022.000000T0000Z-110923T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IREDELL NC-YORK SC-
1142 AM EDT FRI SEP 23 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN YORK AND
SOUTHEASTERN IREDELL COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3481 8073 3483 8080 3494 8079 3505 8089
      3519 8095 3551 8074 3577 8066 3567 8030
      3564 8028 3562 8024

$$

NCC025-119-159-179-231630-
/O.CON.KGSP.FF.W.0022.000000T0000Z-110923T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CABARRUS NC-MECKLENBURG NC-UNION NC-ROWAN NC-
1142 AM EDT FRI SEP 23 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ROWAN...WESTERN UNION...
MECKLENBURG AND CABARRUS COUNTIES IN THE PIEDMONT OF NORTH CAROLINA
UNTIL 1230 PM EDT...

AT 1132 AM EDT...HEAVY RAIN HAD MOVED OUT OF MECKLENBURG...UNION AND 
CABARRUS COUNTIES...THOUGH HEAVY RAIN CONTINUED TO FALL ACROSS 
EASTERN ROWAN COUNTY. COUNTY OFFICES HAVE REPORTED FLOODING IN PARTS 
OF CENTRAL AND EASTERN MECKLENBURG COUNTY...AND IN THE STALLINGS AND 
WEDDINGTON AREAS OF UNION COUNTY. THE BACK CREEK STREAM GAUGE NEAR 
HARRISBURG...IN SOUTHWEST CABARRUS COUNTY...WAS AT 9.35 FEET AT 1130 
AM. AT THIS LEVEL STALLINGS ROAD NEAR QUAIL HALLOW DRIVE WILL FLOOD.

NEW FLOODING IS STILL POSSIBLE ACROSS EASTERN ROWAN COUNTY WHERE 
HEAVY RAIN CONTINUED TO FALL AS OF 1130 AM. ACROSS THE REST OF THE 
I-77 CORRIDOR...WATER LEVELS WILL GENERALLY BEGIN TO RECEDE OVER THE 
NEXT FEW HOURS...THOUGH A FEW LARGER STREAMS ARE LIKELY TO 
RISE...ESPECIALLY ACROSS WESTERN CABARRUS COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
GREENVILLE-SPARTANBURG.

&&

LAT...LON 3481 8073 3483 8080 3494 8079 3505 8089
      3519 8095 3551 8074 3577 8066 3567 8030
      3564 8028 3562 8024

$$

MCAVOY
251 
WGUS72 KGSP 231627
FFSGSP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1227 PM EDT FRI SEP 23 2011

NCC025-119-159-179-231641-
/O.EXP.KGSP.FF.W.0022.000000T0000Z-110923T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CABARRUS NC-MECKLENBURG NC-UNION NC-ROWAN NC-
1227 PM EDT FRI SEP 23 2011

...THE FLASH FLOOD WARNING IN EFFECT FOR ROWAN...WESTERN 
UNION...MECKLENBURG AND CABARRUS COUNTIES IN THE PIEDMONT OF NORTH 
CAROLINA WILL BE ALLOWED TO EXPIRE AT 1230 PM EDT...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO 
RECEDE...ENDING THE THREAT OF ADDITIONAL OR SUDDEN FLASH FLOODING. 
IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW 
ENFORCEMENT AGENCY.

LAT...LON 3481 8073 3483 8080 3494 8079 3505 8089
      3519 8095 3551 8074 3577 8066 3567 8030
      3564 8028 3562 8024

$$

MCAVOY

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Sep 23, 7:08 AM EDT, 2 hours 25 minutes earlier.

Area forecast discussion, Sep 23, 7:08 AM EDT, 2 hours 25 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
708 AM EDT FRI SEP 23 2011

.SYNOPSIS...
A COLD FRONT WILL GRADUALLY PUSH EAST ACROSS THE REGION
TODAY...REACHING THE MIDLANDS TONIGHT. A DEEP UPPER LOW WILL REMAIN
OVER THE OHIO VALLEY TO GREAT LAKES AREA THROUGH EARLY NEXT
WEEK...BEFORE MOVING NORTHEAST.

&&

.NEAR TERM /THROUGH TONIGHT/...
THE BACK EDGE OF THE MORE SOLID PRECIP SHIELD IS STARTING TO SHOW UP
IN NE GA AHEAD OF THE SLOWLY APPROACHING FRONT AND UPPER TROUGH. THE
UPSLOPE FLOW...WARM ADVECTION LIFT...AND DPVA WITH THE BEST IMPULSES
WILL TAPER OFF THROUGH THE MORNING HOURS. WILL THUS BE ABLE TO
ADVERTISE A SLOW BUT STEADY TAPERING TREND TO THE POPS FROM THE SW
TODAY. THE COMBINATION OF CLOUDS AND PRECIP SHOULD KEEP SFC BASED
INSTABILITY A BIT LIMITED THROUGH THE PERIOD...BUT ANY BREAKS COULD
ALLOW TSTM DEVELOPING. IT STILL APPEARS THAT THE BEST LOW LEVEL
EQUIVALENT POTENTIAL TEMPERATURE AXIS SHOULD SET UP JUST EAST OF THE
AREA...ALONG WITH THE STRONGEST BL CONVERGENCE AND UPPER DIVERGENCE.
WILL CONTINUE A BLEND OF MOS TEMPS THIS AFTN WITH QUITE A BIT OF
DIFFERENCE BETWEEN THE COOLER MET AND WARMER MAV.

TONIGHT....THE BOUNDARY WILL CONTINUE TO MOVE SLOWLY E AS IT BECOMES
MORE PARALLEL TO THE UPPER LEVEL FLOW. MID LEVEL DRYING WILL LIKELY
WORK INTO THE AREA OVER THE TOP OF A VERY MOIST BOUNDARY LAYER
THROUGH THE EARLY MORNING HOURS SAT. THIS SHOULD ALLOW POPS TO
STEADILY DIMINISH FROM THE SW TONIGHT. THIS COULD ALSO PROVIDE A
GOOD SETUP FOR DENSE FOG IN SW SECTIONS TOWARD DAYBREAK SAT. A MOS
BLEND ON TEMPS LOOKS REASONABLE.

&&

.SHORT TERM /SATURDAY/...
AT 3 AM ON FRIDAY...AFTER SUNRISE SATURDAY...MODEL GUIDANCE
INDICATES THAT THE SFC COLD FRONT WILL REMAIN EAST OF THE FORECAST
AREA. A CLOSED LOW WILL REMAIN NEARLY STATIONARY OVER THE
HEARTLAND...ROTATING DRY AIR NORTHEAST ACROSS THE SOUTHERN
APPALACHIAN REGION DURING THE DAY. I WILL FORECAST AND STEADY
DECREASE IN SKY COVER AND POP THROUGH THE DAY. HIGH TEMPERATURES
SHOULD VERIFY A FEW DEGREES BELOW NORMAL ACROSS THE MTNS TO NEAR
NORMAL EAST. DRY CONDITIONS SHOULD REMAIN SATURDAY
NIGHT...WITH A SLIGHT INCREASE IN POPS ACROSS THE MTNS BY SUNDAY
AFTERNOON AS A LOBE OF MOISTURE APPROACHES FROM THE WEST.
TEMPERATURES ARE FORECAST TO REMAIN 4 TO 6 DEGREES ABOVE NORMAL ON
SUNDAY.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
AT 305 AM ON FRIDAY...THE H5 CLOSED LOW IS EXPECTED TO DRIFT
NORTHEAST OVER THE GREAT LAKES REGION DURING THE DAY ON MONDAY. AT
THE SFC...A COLD FRONT WILL SWEEP EAST DURING THE DAY...EXPECTED TO
REACH THE NC/TN LINE DURING THE EVENING AND EAST OF THE MTN MONDAY
NIGHT. I WILL INDICATE 30 TO 40 POPS ACROSS THE MTNS FOR SHRA/TSRA
DURING THE LATE AFTERNOON AND EVENING...AND 20 TO 30 POPS EAST FOR
MAINLY SHRA. TEMPERATURES SHOULD AGAIN FAVOR VALUES SEVERAL DEGREES
ABOVE NORMAL GIVEN THE FROPA TIMING.

TUESDAY THROUGH THURSDAY...LARGE HIGH PRESSURE WILL GRADUALLY BUILD
OVER THE REGION FROM THE WEST...PAIRED WITH DRY NW FLOW IN THE MID
LEVELS. THIS PATTERN WILL SUPPORT A DRY FORECAST WITH TEMPERATURES
RANGING VERY CLOSE TO SEASONABLE VALUES.

&&

.AVIATION /11Z FRIDAY THROUGH TUESDAY/...
AT KCLT...THE WIDESPREAD RAIN SHIELD SHOULD IMPACT KCLT THROUGH THE
MORNING HOURS. COVERAGE MAY THEN DWINDLE FROM THE SW THROUGH THE
AFTERNOON HOURS AS THE UPPER SUPPORT SLIPS E OF THE AREA. WILL
FEATURE TEMPO IFR FOR A COUPLE OF HOURS THIS MORNING...WITH A
STEADILY IMPROVING TREND THROUGH MVFR FOR THE AFTN...WITH VFR BY
LATE DAY. THE MOST UNSTABLE AIR SHOULD LINE UP EAST OF THE
TERMINAL...BUT A CB MENTION WILL BE REQUIRED THIS AFTN. LOWER CLOUDS
WILL FILL BACK IN OVERNIGHT AS DRY AIR MOVES IN ALOFT. SFC WINDS
WILL BE LIGHT THROUGH THE PERIOD...BUT WITH A TREND TOWARD SRLY
EARLY...SW THIS AFTERNOON...AND THEN POSSIBLY WESTERLY TONIGHT.

ELSEWHERE...PRECIPITATION SHOULD BEGIN TO TAPER OFF IN COVERAGE FROM
THE SOUTHWEST FROM LATE MORNING THROUGH EARLY AFTERNOON AS THE UPPER
SUPPORT MOVES BY. WILL NEED TEMPO IFR AT TIMES IN THE HEAVIER
SHOWERS THIS MORNING...IMPROVING TO MVFR...WITH VFR LIKELY MID TO
LATE AFTN. WILL ONLY NEED TO CARRY A CB GROUP SINCE INSTABILITY
SHOULD BE LIMITED BY THE CLOUDS AND PRECIPITATION. THE MID LEVEL DRY
SLOT ARRIVING FROM THE SW OVERNIGHT COULD LEAD TO DENSE FOG AND LOW
CLOUD DEVELOP DURING THE OUTLOOK PERIOD OF THE TAF. LIGHT SRLY FLOW
WILL BECOME LIGHT SW THIS AFTERNOON...WITH A POSSIBLE SHIFT TO
WESTERLY TONIGHT AS A WEAK FRONT MOVES INTO THE REGION.

OUTLOOK...AN UPPER LOW PRESSURE SYSTEM PARKED WEST OF THE MOUNTAINS
WILL KEEP THE REGION IN MOIST SW FLOW WITH OCNL SHORTWAVES MOVING
THROUGH THE AREA DURING THE OUTLOOK PERIOD. PERIODS OF LOW CLOUDS
AND VSBY WILL BE POSSIBLE AS THE BL STAYS MOIST WHILE MID LEVELS DRY
OUT AT TIMES. BETTER DRYING IS EXPECTED WITH A COLD FRONTAL PASSAGE
TUE.

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...NED/PAT
NEAR TERM...HG
SHORT TERM...NED
LONG TERM...NED
AVIATION...HG
Hazardous weather outlook, Sep 23, 5:14 AM EDT, 4 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
514 AM EDT FRI SEP 23 2011

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-240915-
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-
514 AM EDT FRI SEP 23 2011

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

.DAY ONE...TODAY AND TONIGHT.

WIDESPREAD MODERATE TO HEAVY RAIN WILL REMAIN ACROSS NORTHEAST
GEORGIA AND THE WESTERN CAROLINAS THIS MORNING. THE HEAVIEST
RAINFALL IS EXPECTED ACROSS THE EASTERN AND SOUTHERN SLOPES OF THE
MOUNTAINS AND EAST TO INTERSTATE 85. THE COVERAGE OF RAIN WILL
GRADUALLY DECREASE FROM WEST TO EAST ACROSS THE REGION THROUGH
THIS EVENING. HOWEVER...A FEW THUNDERSTORMS WILL DEVELOP ACROSS
THE REGION THIS AFTERNOON AND EVENING...ESPECIALLY ACROSS THE
PIEDMONT. THESE STORMS WILL PRODUCE CLOUD TO GROUND LIGHTNING AND
POSSIBLY TORRENTIAL DOWNPOURS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

NED

In the hours before

Special weather statement, Sep 23, 6:39 AM EDT, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
639 AM EDT FRI SEP 23 2011

SCZ011-231200-
ABBEVILLE-
639 AM EDT FRI SEP 23 2011

...A STRONG THUNDERSTORM WILL AFFECT EASTERN ABBEVILLE COUNTY THROUGH
800 AM EDT...

AT 635 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF MODERATE TO HEAVY RAIN ACROSS EASTERN ABBEVILLE COUNTY.
SINCE 4 AM...RADAR RAINFALL ESTIMATES INDICATE THAT TWO TO THREE
INCHES OF RAIN HAS FALLEN ACROSS THE AREA. HOURLY RAINFALL RATES MAY
RANGE BETWEEN A HALF INCH TO AN INCH THROUGH 8 AM.

* DEEP STANDING WATER IS POSSIBLE ON AIRPORT AND SCOTTS ROADS. BLUE
HILL AND PARKER CREEKS IN THE CAROLINA CIRCLE AREA MAY EXPERIENCE
RAPIDLY RISING WATER LEVELS EARLY THIS MORNING. DEEP PONDING OF
WATER IS EXPECTED ALONG ST RD S-33 MAIN AND CEDAR SPRINGS STREETS AT
BLUE HILL CREEK.

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 3408 8256 3435 8248 3437 8234 3432 8233
      3432 8231 3428 8231 3423 8225 3419 8224
      3416 8224 3411 8227 3407 8232

NED
Special weather statement, Sep 23, 9:06 AM EDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
906 AM EDT FRI SEP 23 2011

NCZ036-056-057-069>072-082-SCZ009-014-231430-
CABARRUS-CATAWBA-CHESTER-GASTON-IREDELL-LINCOLN-MECKLENBURG-ROWAN-
UNION-YORK-
906 AM EDT FRI SEP 23 2011

...HEAVY RAIN WILL AFFECT CABARRUS...EASTERN CHESTER...EASTERN
GASTON...EASTERN LINCOLN...EASTERN YORK...IREDELL...
MECKLENBURG...ROWAN...SOUTHEASTERN CATAWBA AND WESTERN UNION
COUNTIES THROUGH 1030 AM EDT...

AT 859 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF HEAVY RAIN OVER THE AREA MOVING NORTHEAST AROUND 20 MPH.
RAINFALL RATES WILL BE AROUND ONE INCH PER HOUR IN SOME AREAS
THROUGH 1030 AM.

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...PARTICULARLY IN THE CHARLOTTE METRO AREA. ALSO...SMALL
CREEKS IN AND AROUND CHARLOTTE WILL SHOW RAPID RISES.  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 3519 8050 3518 8047 3481 8071 3481 8079
      3482 8080 3494 8079 3505 8089 3495 8086
      3484 8086 3482 8089 3470 8085 3465 8089
      3456 8087 3454 8089 3457 8121 3597 8098
      3559 8021

LG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 23, 1:20 AM EDTAreal Flood AdvisoryGSPTransylvania100 min
Sep 23, 4:33 AM EDTFlash Flood WarningGSPHenderson4 hr
Sep 23, 9:06 AM EDTSpecial Weather StatementGSPCabarrus, Iredell, Mecklenburg, Rowan84 min
Sep 23, 9:17 AM EDTAreal Flood AdvisoryGSPCabarrus, Mecklenburg3 hr
Sep 23, 6:39 AM EDTSpecial Weather StatementGSPAbbeville81 min

Nearby

Flash Flood Warnings in North Carolina, 2011Flash Flood Warnings in South Carolina, 2011Every flash flood 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.