Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 558, NWS Greenville-Spartanburg, SC

September 3, 2012Davie County, Iredell County, Rowan County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 3, 2012, 4:51 PM EDT for Davie County, Iredell County, Rowan County, North Carolina. It was in force for 39 min. 1 report 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 3, 2012, 4:51 PM EDT (20:51 UTC)
Expired
Sep 3, 2012, 5:30 PM EDT
In force
39 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), 124 km from the middle of the area, began a volume at 20:53 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 3, 5:00 PM EDTTSTM WND DMG4 Nw Harmony, NCMULTIPLE TREES AND POWER LINES DOWN ON HWY 901 NEAR I-77.

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 9 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, 8.9 hours before the alert went out and 71 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 2012-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 576 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 2012-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.1939Sfc1 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
576 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
44 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.

413 
WUUS52 KGSP 032051
SVRGSP
NCC059-097-159-032130-
/O.NEW.KGSP.SV.W.0558.120903T2051Z-120903T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
451 PM EDT MON SEP 3 2012

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...
  NORTHWESTERN ROWAN COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 530 PM EDT

* AT 447 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 5 MILES SOUTH OF WINDY GAP TO CLEVELAND...AND MOVING NORTHEAST
  AT 15 MPH.

* SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  HARMONY.
  MOCKSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE CAPABLE OF BLOWING DOWN SCATTERED TREES AND POWER
LINES. SEEK SHELTER INSIDE AN INTERIOR ROOM.

THESE SEVERE THUNDERSTORMS ARE ALSO PRODUCING FREQUENT AND INTENSE
LIGHTNING. TURN OFF ELECTRICAL APPLIANCES. DO NOT USE CORDED
TELEPHONES. DO NOT TAKE A BATH OR SHOWER.

TO REPORT DAMAGING WINDS...HAIL...OR FLOODING THROUGH OUR AUTOMATED
REPORTING SYSTEM...CALL TOLL FREE...1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3568 8078 3595 8101 3600 8100 3605 8103
      3607 8098 3605 8049 3607 8046 3601 8041
      3599 8041 3596 8037 3593 8037
TIME...MOT...LOC 2051Z 227DEG 12KT 3605 8096 3578 8073

$$

JOH
2 follow-up statements
714 
WWUS52 KGSP 032114
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
514 PM EDT MON SEP 3 2012

NCC059-097-159-032130-
/O.CON.KGSP.SV.W.0558.000000T0000Z-120903T2130Z/
DAVIE NC-IREDELL NC-ROWAN NC-
514 PM EDT MON SEP 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
ROWAN...NORTHEASTERN IREDELL AND DAVIE COUNTIES UNTIL 530 PM EDT...

AT 512 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM BUCK SHOALS TO 6 MILES WEST OF COOLEEMEE...MOVING NORTHEAST AT
15 MPH.

SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  MOCKSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE CAPABLE OF BLOWING DOWN SCATTERED TREES AND POWER
LINES. SEEK SHELTER INSIDE AN INTERIOR ROOM.

THESE SEVERE THUNDERSTORMS ARE ALSO PRODUCING FREQUENT AND INTENSE
LIGHTNING. TURN OFF ELECTRICAL APPLIANCES. DO NOT USE CORDED
TELEPHONES. DO NOT TAKE A BATH OR SHOWER.

TO REPORT DAMAGING WINDS...HAIL...OR FLOODING THROUGH OUR AUTOMATED
REPORTING SYSTEM...CALL TOLL FREE...1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3568 8078 3597 8095 3600 8099 3605 8103
      3607 8098 3605 8049 3607 8046 3601 8041
      3599 8041 3596 8037 3593 8037
TIME...MOT...LOC 2114Z 227DEG 12KT 3610 8089 3583 8066

$$

JOH
261 
WWUS52 KGSP 032122
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
522 PM EDT MON SEP 3 2012

NCC059-097-159-032133-
/O.EXP.KGSP.SV.W.0558.000000T0000Z-120903T2130Z/
DAVIE NC-IREDELL NC-ROWAN NC-
522 PM EDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ROWAN...
NORTHEASTERN IREDELL AND DAVIE COUNTIES WILL EXPIRE AT 530 PM EDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LEVELS.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 3568 8078 3597 8095 3600 8099 3605 8103
      3607 8098 3605 8049 3607 8046 3601 8041
      3599 8041 3596 8037 3593 8037
TIME...MOT...LOC 2123Z 227DEG 12KT 3612 8086 3585 8063

$$

JOH

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 Sep 3, 4:29 PM EDT, 22 minutes earlier.

Area forecast discussion, Sep 3, 4:29 PM EDT, 22 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
429 PM EDT MON SEP 3 2012

.SYNOPSIS...
THE REMNANTS OF ISAAC WILL CONTINUE TO SLOWLY MOVE EASTWARD ACROSS
THE OHIO RIVER VALLEY TONIGHT. AMPLE MOISTURE OUT AHEAD OF THIS
SYSTEM WILL PERSIST OVER THE WESTERN CAROLINAS AND NORTHEAST GEORGIA
THROUGH MIDWEEK BEFORE A COLD FRONT ARRIVES FROM THE NORTHWEST OVER
THE WEEKEND.

&&

.NEAR TERM /THROUGH TUESDAY/...
AS OF 425 PM...CONVECTION INCREASING OUTSIDE OF THE MTNS AHEAD OF AN
APPROACHING MCV. THIS IS ACTING ON THE VERY MOIST AND UNSTABLE AIR
MASS TO KICK OFF SEVERAL BKN LINES OF CONVECTION WHICH ARE MOVING NE
ACROSS THE AREA. EXPECT THIS ACTIVITY TO CONTINUE INTO THE EARLY
EVENING BEFORE TAPERING OFF. HAVE INCREASED POP TO CATEGORICAL IN
THESE AREAS. CONVECTION CURRENTLY MINIMAL ACROSS THE MTNS AS A
SLIGHTLY DRIER AN MORE STABLE AIR MASS HAS MOVED IN BEHIND THIS
CONVECTION. HAVE DROPPED POP BACK TO CHC THRU THE EARLY EVENING.
EXPECT SHOWERS AND ISOLATED STORM TO RETURN TO THE MTNS AS MOISTURE
MOVES BACK IN OVERNIGHT. THEREFORE...LET POP RETURN TO AT LEAST
LIKELY IN THESE AREAS. MADE OTHER ADJUSTMENTS BASED ON CURRENT
CONDITIONS.

AS OF MID AFTERNOON...KGSP RADAR SHOWS SHOWERS AND THUNDERSTORMS
BLOSSOMING OVER THE PIEDMONT AND UPSTATE...EAST OF REMNANT CLOUD
BOUNDARY...WHERE DESTABILIZATION HAS ALLOWED SFC BASED CAPE TO CLIMB
ABOVE 2500 J/KG. LOW LEVEL FORCING AND BUOYANCY SHOULD ALLOW THIS
TREND TO CONTINUE THROUGH THE LATE AFTERNOON AND INTO THE EARLY
EVENING. HEAVY RAIN REMAINS THE PRIMARY THREAT AS CONVECTIVE
CLUSTERS MOVE FAIRLY SLOW BUT ELONGATE SW TO NE IN THE GENERAL
DIRECTION OF MOVEMENT. CONFIDENCE NOT HIGH ENOUGH TO ISSUE A FLASH
FLOOD WATCH AT THIS TIME...BUT THERE IS A DISTINCT POSSIBILITY THAT
FLOODING COULD BECOME A PROBLEM OVER THE CLT METRO AREA LATE THIS
AFTERNOON OR THIS EVENING.

NOT MUCH HAS CHANGED TO EARLIER THINKING WITH REGARD TO THE FCST
TONIGHT AND TUESDAY. THE WEAKENING UPPER LOW ASSOCIATED WITH REMNANT
OF ISAAC WILL SLOWLY DEAMPLIFY AND STRETCH OUT ACROSS THE
APPALACHIANS AND WRN CAROLINAS THROUGH LATE TUESDAY. SPOKES OF WEAK
DPVA WILL PROVIDE UPPER SUPPORT FOR DEEP CONVECTION. MORE
IMPORTANTLY...THE AIR MASS WILL REMAIN RICH WITH TROPICAL MOISTURE.
A PLUME OF LOW LEVEL THETA-E AND PW IN EXCESS OF 2 INCHES WILL
REMAIN IN PLACE. THE LOW LEVEL FLOW WILL ALSO RETAIN A SOUTHERLY
UPSLOPE COMPONENT...WITH SOME CONVERGENCE OVER THE FOOTHILLS AND
PIEDMONT MAXIMIZING IN THE AFTERNOON ON TUESDAY. THE MODELS RESPOND
IN KIND WITH WIDESPREAD PRECIP COVERAGE FOR THE NEXT 24 HOURS.
ESSENTIALLY...A SHOWER AND THUNDERSTORM COULD DEVELOP AT ANY TIME
ACROSS THE ENTIRE FCST AREA THROUGH THE NEAR TERM...MODULATED BY
DAYTIME HEATING. PRECIP CHANCES WILL BE SHOWN TO WANE TOWARD
DAYBREAK TUESDAY...BUT WILL RECOVER QUICKLY WITH HEATING ON TUESDAY.
SEE NO REASON TO THINK STORMS WILL BE ANYTHING LESS THAN NUMEROUS IN
THE AFTERNOON...SO POP WAS RAISED TO LIKELY. TEMPS WILL BE MILD
TONIGHT AND THEN ON THE COOL SIDE OF GUIDANCE TUESDAY. THE SRN
PIEDMONT MAY WARM UP THE MOST TUESDAY AS THEY STAND THE BEST CHANCE
OF BREAKING OUT AT SOME POINT.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
AS OF 230 PM EDT MONDAY... AT 00Z WEDNESDAY THE REMNANTS OF THE OHIO
VALLEY UPPER LEVEL CYCLONIC CIRCULATION WILL BE IN THE PROCESS OF
BEING PARTIALLY ABSORBED  BY THE FAST WESTERLY FLOW ACROSS THE
NORTHERN HALF OF THE COUNTRY. HOWEVER... A WEAK TROUGH/CYCLONIC
SHEAR AXIS WILL HAVE SEPARATED FROM THE NORTHERN PART OF THE LOW AND
WILL BE DRIFTING ACROSS THE FORECAST AREA WITH A ZONE OF CYCLONIC
VORTICITY ADVECTION PROMOTING UPWARD MOTION. BY WEDNESDAY MORNING...
THE NAM AND GFS PLACE THE AXIS OF THE MID LEVEL TROUGH BASICALLY
NORTH/SOUTH OVER THE MOUNTAINS AND FOOTHILLS. LOW LEVEL AIR MASS
REMAINS VERY MOIST IN ADVANCE OF THE TROUGH. MODEL PROFILES DISPLAY
AFTERNOON CAPES GENERALLY IN THE 1000 TO 1500 J/KG RANGE... SO
CONVECTIVE STORMS CERTAINLY APPEAR LIKELY. MODEST AMOUNTS OF CAPE
PERSIST WELL INTO THE NIGHT... THUS NOCTURNAL SHOWERS AND
THUNDERSTORMS ARE QUITE POSSIBLE. PRECIPITABLE WATER VALUES REMAIN
HIGH AND WINDS THROUGH THE CLOUD LAYER DO NOT BECOME PARTICULARLY
STRONG. LOCALLY HEAVY RAIN REMAINS A POSSIBILITY. DURING THURSDAY...
THE TROUGH CONTINUES DRIFTING EAST ALLOWING DRIER AIR TO SPREAD INTO
THE CWA FROM THE WEST. GFS HINTS AT A LITTLE MORE LINGERING MOISTURE
THAN THE NAM AT THIS POINT. HAVE OPTED TO CONTINUE WITH CHANCE AND
SLIGHT CHANCE POPS IN THE FAR WEST ON THURSDAY WITH CHANCE POPS
CENTRAL AND EAST. CLOUDS AND SHOWERS WILL HOLD DAYTIME TEMPERATURES
WEDNESDAY AND THURSDAY IN THE 80S WITH 70S IN THE MOUNTAINS...
ALTHOUGH A LITTLE MORE SUN ON THURSDAY COULD BOOST AFTERNOON
TEMPERATURES A FEW DEGREES. WARM AND MUGGY OVERNIGHT WEATHER WILL
PERSIST WITH LOWS IN THE 60S AND LOWER 70S.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
AS OF 1145 AM EDT MONDAY...THE MEDIUM RANGE FCST PICKS UP AT 00Z ON
FRIDAY WITH BROAD UPPER TROFFING OVER THE GREAT LAKES AND THE
REMNANTS OF A WEAK UPPER LOW SPINNING OFF THE SE COAST. HEIGHTS ARE
EXPECTED TO STEADILY LOWER AS THE UPPER TROF DEEPENS CONSIDERABLY
OVER THE WEEKEND AND BECOMES POSITIVELY TILTED AS IT MOVES OVER THE
CWFA. BY THE END OF THE PERIOD ON DAY 7...HEIGHTS SHOULD BEGIN
RISING AS WEAK UPPER RIDGING STARTS TO BUILD IN.

AT THE SFC...WE WILL BE IN AN ACTIVE PATTERN THRU THE WEEKEND WITH A
FAIRLY ROBUST LOOKING SFC RIDGE LIKELY PUSHING INTO THE REGION EARLY
NEXT WEEK AND DRYING/COOLING THINGS OFF BEYOND DAY 7. FRIDAY IS
LOOKING MOSTLY DRY FOR THE UPSTATE AND PIEDMONT WITH A SOLID CHANCE
FOR TSRA OVER THE NC MTS/FOOTHILLS. POPS RAMP UP ON SATURDAY AS THE
MODELS DEVELOP A SFC LOW TO OUR WEST/SW AND PUSH ITS ASSOCIATED
FRONTAL BNDY THRU THE CWFA LATE SAT/EARLY SUN. THERE COULD BE A GOOD
POTENTIAL FOR ORGANIZED TS WITH THIS FROPA BASED ON CURRENT
DEPICTIONS...SO THAT WILL NEED TO BE WATCHED CLOSELY IN THE COMING
DAYS. IN THE WAKE OF THE FRONTAL BNDY...DRIER HIGH PRESSURE WILL
BUILD IN AND CLEAR THINGS OUT. FOR THE TIME BEING...I HAVE HIGH END
CHANCE POPS OVER MOST OF THE CWFA LATE SAT THRU SUN AFTERNOON WITH
VALUES DROPPING ON MONDAY. THE LONG RANGE MODELS ARE IN PRETTY GOOD
AGREEMENT WRT THE TIMING OF THE FROPA...BUT THE EVOLUTION OF THE SFC
LOW DOES NOT MATCH UP VERY WELL AT THIS TIME. TEMPS ARE EXPECTED TO
COOL THRU THE PERIOD WITH HIGHS AROUND NORMAL ON FRI AND VALUES
ABOUT A CATEGORY BELOW NORMAL BY DAY 7.

&&

.AVIATION /21Z MONDAY THROUGH SATURDAY/...
AT KCLT...BKN LINE OF CONVECTION WILL MOVE ACROSS THE AIRFIELD BY
21Z AND CONTINUE FOR A COUPLE OF HOURS. WILL ADJUST TAF TO COVER
THIS EVENT. AFTER 23Z...HAVE BACKED OFF ON RESTRICTIONS FOR NOW AS
THERE MAY BE A LULL IN ACTIVITY IN THE WAKE OF THUNDERSTORMS... BUT
AIR MASS RECOVERY COULD BE QUICK AND ADDITIONAL STORMS ARE POSSIBLE
WELL INTO THE EVENING. THIS WILL BE HANDLED IN FUTURE AMENDMENTS.
OTHERWISE...RICH LOW LEVEL MOISTURE WILL REMAIN IN PLACE. CEILING
SHOULD GRADUALLY COME DOWN INTO IFR CATEGORY ACROSS THE PIEDMONT
AFTER MIDNIGHT WITH FOG DEVELOPING TO AT LEAST MVFR CRITERIA.
CONFIDENCE IS HIGH THAT CONDITIONS WILL BE AT LEAST MVFR. EXPECT A
SLOW IMPROVEMENT TO MVFR DURING MID/LATE MORNING TUESDAY. ONCE THE
CEILING LIFTS... RAPID CONVECTIVE DEVELOPMENT WILL TAKE PLACE
AGAIN...EARLY TUESDAY AFTERNOON. WINDS WILL GENERALLY REMAIN S TO SW
THROUGH THE PERIOD AWAY FROM NEARBY STORMS.

ELSEWHERE...CONDITIONS SIMILAR TO KCLT WITH MAINLY VFR OUTSIDE
STORMS AND MVFR/IFR INSIDE NUMEROUS SHOWERS AND STORMS. KAVL THE
EXCEPTION WHERE CONVECTION HAS WANED AS A DRIER MORE STABLE AIR MASS
HAS MOVED IN. EXPECT CONVECTION TO RETURN TO THE MTNS BY EVENING.
THE CONVECTION SHOULD MAXIMIZE IN COVERAGE LATE THIS AFTERNOON AND
EVENING AND THEN WANE LATER THIS EVENING. HOWEVER...EXPECT SOME
SHOWERS TO CONTINUE ALL NIGHT LONG. CEILINGS WILL FALL AFTER SUNSET
INTO THE MVFR CATEGORY AND THEN IFR DURING THE EARLY MORNING HOURS
AT ALL SITES WITH FAIRLY HIGH CONFIDENCE. MORE CONVECTION WILL
DEVELOP BY MIDDAY TUESDAY.

OUTLOOK...DEEP MOISTURE WILL PERSIST ACROSS THE REGION THROUGH AT
LEAST WEDNESDAY. LOW CLOUD/FOG RESTRICTIONS WILL BECOME INCREASINGLY
WIDESPREAD AND PERSISTENT AS SHOWER COVERAGE REMAINS HIGH TUE INTO
WED. GRADUAL DRYING FROM THE WEST IS POSSIBLE THU...BUT MORE LIKELY
ON FRI.

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...PM/RWH
SHORT TERM...LGL
LONG TERM...JPT
AVIATION...PM/RWH
Hazardous weather outlook, Sep 3, 4:30 PM EDT, 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
430 PM EDT MON SEP 3 2012

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-042030-
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-
430 PM EDT MON SEP 3 2012

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

.DAY ONE...TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS WILL CONTINUE ACROSS THE AREA.
THE MOST LIKELY THREAT WITH THE THUNDERSTORMS WILL BE VERY HEAVY
RAINFALL AND OCCASIONAL CLOUD TO GROUND LIGHTNING STRIKES. IF
MULTIPLE THUNDERSTORMS AFFECT THE SAME LOCATION... ISOLATED FLASH
FLOODING OF STREAMS AND CREEKS COULD RESULT. IN ADDITION... A FEW
THUNDERSTORMS MAY BECOME STRONG ENOUGH TO PRODUCE BRIEF BUT
DAMAGING WIND GUSTS. SHOWERS AND THUNDERSTORMS WILL BECOME LESS
NUMEROUS DURING THE OVERNIGHT HOURS... BUT THE POSSIBILITY OF
ISOLATED THUNDERSTORMS WITH HEAVY RAIN WILL PERSIST.

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

SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN TUESDAY THROUGH
WEDNESDAY...AND POSSIBLY INTO THURSDAY. LOCALIZED FLASH FLOODING
IS QUITE POSSIBLE THIS WEEK...BUT UNCERTAINTY REMAINS TOO HIGH TO
DEFINE LOCATIONS THAT MIGHT REQUIRE A FLASH FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF HAIL...
WIND DAMAGE... OR FLASH FLOODING TO OUR OFFICE.

In the hours before

Special weather statement, Sep 3, 3:50 PM EDT, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
350 PM EDT MON SEP 3 2012

GAZ028-029-SCZ010-011-032030-
ABBEVILLE-ANDERSON-ELBERT-HART-
350 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT ELBERT...HART...SOUTHWESTERN
ANDERSON AND WESTERN ABBEVILLE COUNTIES THROUGH 430 PM EDT...

AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF
DANIELSVILLE TO 3 MILES NORTHEAST OF VESTA...MOVING NORTHEAST AT 30
MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  FORTSONIA...
  VANNA...
  LAKE RUSSELL...
  NUBERG...
  HARTWELL...
  IVA...

PEA SIZE HAIL...WIND GUSTS OF 40 TO 50 MPH AND TORRENTIAL RAIN ARE
EXPECTED WITH THESE STORMS.

FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF OUTDOORS...TRY
TO GET INDOORS OR INTO A HARD TOPPED VEHICLE. OTHERWISE...STAY AWAY
FROM OPEN AREAS AND ISOLATED HIGH OBJECTS SUCH AS TREES. WHEN
INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING WIRED
ELECTRONIC DEVICES. TRY TO UNPLUG UNNECESSARY APPLIANCES BEFORE THE
STORM APPROACHES.

LAT...LON 3398 8282 3398 8286 3400 8293 3405 8299
      3414 8306 3417 8311 3423 8308 3427 8312
      3428 8310 3430 8310 3449 8281 3424 8236
      3397 8279

ARK
Special weather statement, Sep 3, 4:06 PM EDT, 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
406 PM EDT MON SEP 3 2012

NCZ071-032030-
MECKLENBURG-
406 PM EDT MON SEP 3 2012

...A STRONG THUNDERSTORM WILL AFFECT MECKLENBURG COUNTY THROUGH 430
PM EDT...

AT 403 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SOUTHPARK MALL...OR 3 MILES SOUTH OF CENTER
CITY CHARLOTTE...MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  CENTER CITY CHARLOTTE...
  EASTLAND MALL...
  UNC CHARLOTTE...

PEA SIZE HAIL...WIND GUSTS UP TO 40 MPH AND TORRENTIAL RAIN ARE
EXPECTED WITH THIS STORM.

LAT...LON 3525 8063 3506 8079 3516 8098 3543 8080
      3541 8076 3540 8077 3535 8069 3527 8067

ARK
Special weather statement, Sep 3, 4:14 PM EDT, 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
414 PM EDT MON SEP 3 2012

NCZ082-032100-
UNION-
414 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT UNION COUNTY THROUGH 500 PM
EDT...

AT 411 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM WAXHAW TO 4 MILES
EAST OF MINERAL SPRINGS TO WINGATE...MOVING NORTH AT 20 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  WINGATE...
  UNIONVILLE...
  STALLINGS...
  FAIRVIEW...

SMALL HAIL...TORRENTIAL RAIN...AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS.

HEAVY RAINS MAY FLOOD AREAS WITH POOR DRAINAGE...SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE RAPIDLY. SEEK HIGHER
GROUND IF THREATENED BY FLOOD WATERS.

LAT...LON 3482 8035 3482 8063 3481 8079 3486 8080
      3494 8079 3499 8084 3501 8084 3503 8077
      3521 8055 3517 8046 3518 8037 3517 8035
      3519 8029

ARK
Special weather statement, Sep 3, 4:19 PM EDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
419 PM EDT MON SEP 3 2012

NCZ035>037-056-057-501-502-032115-
ALEXANDER-CALDWELL MOUNTAINS-CATAWBA-DAVIE-GREATER
CALDWELL-IREDELL-ROWAN-
419 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT ALEXANDER...DAVIE...IREDELL...
NORTHEASTERN CALDWELL...NORTHERN CATAWBA AND NORTHWESTERN ROWAN
COUNTIES THROUGH 515 PM EDT...

AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES WEST OF
KINGS CREEK TO 3 MILES NORTHWEST OF MOUNT ULLA...MOVING NORTHEAST AT
15 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  STONY POINT...
  TAYLORSVILLE...
  CLEVELAND...
  COOLEEMEE...
  HARMONY...
  MOCKSVILLE...

SMALL HAIL...WIND GUSTS OF 40 TO 50 MPH AND TORRENTIAL RAIN ARE
EXPECTED WITH THESE STORMS.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...TRY TO
GET INDOORS OR INTO A HARD TOPPED VEHICLE. OTHERWISE...STAY AWAY FROM
OPEN AREAS AND ISOLATED HIGH OBJECTS SUCH AS TREES. WHEN INDOORS...
STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING WIRED ELECTRONIC
DEVICES. TRY TO UNPLUG UNNECESSARY APPLIANCES BEFORE THE STORM
APPROACHES.

LAT...LON 3560 8075 3595 8165 3611 8151 3608 8142
      3600 8132 3603 8127 3603 8108 3607 8098
      3605 8049 3606 8048 3605 8045 3601 8041
      3599 8041 3596 8037

JOH
Special weather statement, Sep 3, 4:32 PM EDT, 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
432 PM EDT MON SEP 3 2012

SCZ008-009-014-032115-
CHEROKEE-CHESTER-YORK-
432 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT CHESTER...EASTERN CHEROKEE AND
YORK COUNTIES THROUGH 515 PM EDT...

AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES WEST OF
SMYRNA TO 5 MILES NORTHEAST OF BLACKSTOCK...MOVING NORTHEAST AT 15
MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  MCCONNELLS...
  RICHBURG...
  GREAT FALLS RESERVOIR...
  FISHING CREEK RESERVOIR...

WIND GUSTS UP TO 40 MPH...AND TORRENTIAL RAIN ARE EXPECTED WITH THESE
STORMS.

HEAVY RAINS MAY FLOOD AREAS WITH POOR DRAINAGE...SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE RAPIDLY. SEEK HIGHER
GROUND IF THREATENED BY FLOOD WATERS.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...TRY TO
GET INDOORS OR INTO A HARD TOPPED VEHICLE. OTHERWISE...STAY AWAY FROM
OPEN AREAS AND ISOLATED HIGH OBJECTS SUCH AS TREES. WHEN INDOORS...
STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING WIRED ELECTRONIC
DEVICES. TRY TO UNPLUG UNNECESSARY APPLIANCES BEFORE THE STORM
APPROACHES.

LAT...LON 3465 8089 3457 8087 3454 8096 3455 8116
      3509 8164 3517 8147 3515 8116 3483 8088
      3482 8089 3477 8086 3474 8087 3470 8085

ARK
Special weather statement, Sep 3, 4:35 PM EDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
435 PM EDT MON SEP 3 2012

GAZ028-SCZ006-007-010>012-019-032130-
ABBEVILLE-ANDERSON-GREATER
GREENVILLE-GREENWOOD-HART-LAURENS-SPARTANBURG-
435 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT ABBEVILLE...ANDERSON...LAURENS...
NORTHEASTERN HART...NORTHERN GREENWOOD...SOUTHERN GREENVILLE AND
SOUTHWESTERN SPARTANBURG COUNTIES THROUGH 530 PM EDT...

AT 431 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SADLERS CREEK STATE
PARK TO 4 MILES NORTH OF MOUNT CARMEL...MOVING NORTHEAST AT 45 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  SECESSION LAKE...
  SANDY SPRINGS...
  BROADWAY LAKE...
  DUE WEST...
  HONEA PATH...
  WILLIAMSTON...

WIND GUSTS OF 40 TO 50 MPH...AND TORRENTIAL RAIN ARE EXPECTED WITH
THESE STORMS.

HEAVY RAINS MAY FLOOD AREAS WITH POOR DRAINAGE...SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE RAPIDLY. SEEK HIGHER
GROUND IF THREATENED BY FLOOD WATERS.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...TRY TO
GET INDOORS OR INTO A HARD TOPPED VEHICLE. OTHERWISE...STAY AWAY FROM
OPEN AREAS AND ISOLATED HIGH OBJECTS SUCH AS TREES. WHEN INDOORS...
STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING WIRED ELECTRONIC
DEVICES. TRY TO UNPLUG UNNECESSARY APPLIANCES BEFORE THE STORM
APPROACHES.

LAT...LON 3422 8275 3427 8275 3428 8280 3448 8298
      3476 8262 3481 8249 3486 8249 3507 8221
      3466 8183 3460 8184 3456 8175 3448 8167
      3436 8178 3430 8189 3424 8191 3405 8233
      3407 8249 3403 8258

JOH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 12:51 PM EDTAreal Flood AdvisoryGSPDavie99 min
Sep 3, 1:08 PM EDTSpecial Weather StatementGSPUnion37 min
Sep 3, 2:19 PM EDTFlash Flood WarningGSPDavie4 hr
Sep 3, 2:37 PM EDTSpecial Weather StatementGSPUnion38 min
Sep 3, 2:43 PM EDTSpecial Weather StatementGSPRowan47 min
Sep 3, 3:04 PM EDTSpecial Weather StatementGSPPolk41 min
Sep 3, 3:09 PM EDTSevere Thunderstorm WarningGSPPolk, Rutherford32 min
Sep 3, 3:20 PM EDTSpecial Weather StatementGSPUnion40 min
Sep 3, 3:32 PM EDTSpecial Weather StatementGSPCatawba, Lincoln43 min
Sep 3, 3:46 PM EDTSpecial Weather StatementGSPRutherford44 min
Sep 3, 3:48 PM EDTSpecial Weather StatementGSPCleveland, Rutherford42 min
Sep 3, 4:06 PM EDTSpecial Weather StatementGSPMecklenburg24 min
Sep 3, 4:14 PM EDTSpecial Weather StatementGSPUnion46 min
Sep 3, 4:19 PM EDTSpecial Weather StatementGSPAlexander, Caldwell, Davie, Iredell56 min
Sep 3, 4:55 PM EDTSpecial Weather StatementGSPMecklenburg50 min
Sep 3, 5:19 PM EDTSevere Thunderstorm WarningGSPGaston, Mecklenburg56 min
Sep 3, 5:30 PM EDTSpecial Weather StatementGSPDavie, Iredell45 min
Sep 3, 5:32 PM EDTAreal Flood AdvisoryGSPCabarrus, Gaston, Lincoln, Mecklenburg, Union118 min
Sep 3, 5:55 PM EDTSpecial Weather StatementGSPLincoln35 min
Sep 3, 6:11 PM EDTAreal Flood AdvisoryGSPDavie, Iredell, Rowan109 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012Every severe thunderstorm warning in 2012

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.