Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 557, NWS Greenville-Spartanburg, SC

September 3, 2012Polk County, Rutherford County, North Carolina; Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 3, 2012, 3:09 PM EDT for Polk County, Rutherford County, North Carolina; Spartanburg County, South Carolina. It was in force for 32 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
Sep 3, 2012, 3:09 PM EDT (19:09 UTC)
Expired
Sep 3, 2012, 3:41 PM EDT
In force
32 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Polk County, NC, Rutherford County, NC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 44 km from the middle of the area, began a volume at 19:10 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, 3:25 PM EDTTSTM WND DMG6 Ese Columbus, NCONE TREE DOWN ON PHILLIPS ROAD.
Sep 3, 3:25 PM EDTTSTM WND DMG9 E Columbus, NCONE TREE BLOWN DOWN ON COXE ROAD.

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 2 storm reports to this severe thunderstorm warning; the first came 16 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, 7.2 hours before the alert went out and 214 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.

642 
WUUS52 KGSP 031909
SVRGSP
NCC149-161-SCC083-032015-
/O.NEW.KGSP.SV.W.0557.120903T1909Z-120903T2015Z/

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

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN POLK COUNTY IN WESTERN NORTH CAROLINA...
  SOUTH CENTRAL RUTHERFORD COUNTY IN WESTERN NORTH CAROLINA...
  NORTHWESTERN SPARTANBURG COUNTY IN UPSTATE SOUTH CAROLINA...

* UNTIL 415 PM EDT

* AT 306 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 6 MILES
  NORTH OF LAKE BOWEN...OR 8 MILES SOUTHEAST OF COLUMBUS...AND MOVING
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL IMPACT LOCATIONS NEAR...
  SPINDALE AND RUTHERFORDTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BRIEF DAMAGING WINDS WILL BLOW DOWN TREES AND POWER LINES OVER SMALL
AREAS. A BRIEF PERIOD OF LARGE HAIL IS ALSO POSSIBLE. SEEK SHELTER
INSIDE AN INTERIOR ROOM.

THIS SEVERE THUNDERSTORM IS ALSO PRODUCING EXTREMELY HEAVY RAINFALL.
FLOODING OF DRAINAGE DITCHES AND LOW LYING AREAS MAY OCCUR. DO NOT
DRIVE THROUGH AREAS WHERE WATER IS FLOWING OVER THE ROAD.

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 3541 8199 3528 8178 3507 8207 3517 8222
      3520 8222
TIME...MOT...LOC 1909Z 222DEG 15KT 3520 8207

$$
LG
2 follow-up statements
204 
WWUS52 KGSP 031934
SVSGSP

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

SCC083-031944-
/O.CAN.KGSP.SV.W.0557.000000T0000Z-120903T2015Z/
SPARTANBURG SC-
334 PM EDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SPARTANBURG
COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THIS AREA.

LAT...LON 3532 8184 3520 8195 3530 8212 3541 8199
TIME...MOT...LOC 1934Z 215DEG 18KT 3533 8198

$$

NCC149-161-032015-
/O.CON.KGSP.SV.W.0557.000000T0000Z-120903T2015Z/
POLK NC-RUTHERFORD NC-
334 PM EDT MON SEP 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
RUTHERFORD AND EAST CENTRAL POLK COUNTIES UNTIL 415 PM EDT...

AT 331 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
RUTHERFORDTON...MOVING NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL IMPACT LOCATIONS NEAR...
  RUTHERFORDTON.
  SPINDALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BRIEF DAMAGING WINDS WILL BLOW DOWN TREES AND POWER LINES OVER SMALL
AREAS. A BRIEF PERIOD OF LARGE HAIL IS ALSO POSSIBLE. SEEK SHELTER
INSIDE AN INTERIOR ROOM.

THIS SEVERE THUNDERSTORM IS ALSO PRODUCING EXTREMELY HEAVY RAINFALL.
FLOODING OF DRAINAGE DITCHES AND LOW LYING AREAS MAY OCCUR. DO NOT
DRIVE THROUGH AREAS WHERE WATER IS FLOWING OVER THE ROAD.

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 3532 8184 3520 8195 3530 8212 3541 8199
TIME...MOT...LOC 1934Z 215DEG 18KT 3533 8198

$$
LG
135 
WWUS52 KGSP 031941
SVSGSP

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

NCC149-161-031951-
/O.CAN.KGSP.SV.W.0557.000000T0000Z-120903T2015Z/
POLK NC-RUTHERFORD NC-
341 PM EDT MON SEP 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL RUTHERFORD AND EAST
CENTRAL POLK COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF 
THIS AREA.

LAT...LON 3532 8184 3520 8195 3530 8212 3541 8199
TIME...MOT...LOC 1941Z 222DEG 15KT 3530 8196

$$
LG

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, 2:53 PM EDT, 16 minutes earlier.

Area forecast discussion, Sep 3, 2:53 PM EDT, 16 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
253 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 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 /19Z MONDAY THROUGH SATURDAY/...
AT KCLT...SEVERAL SHOWERS AND THUNDERSTORMS HAVE DEVELOPED OVER THE
SRN PIEDMONT. THE MAIN CLUSTER OF INTEREST WAS SW OF THE AIRFIELD AT
1730Z AND WILL BE MONITORED FOR IMPACT. KEPT A TEMPO FOR
THUNDERSTORMS IN THE 19Z TO 23Z TIME FRAME. A SHOWER OR THUNDERSTORM
COULD POP UP AT ANY TIME THROUGH THE PEAK OF DAYTIME HEATING. THINK
VFR CONDITIONS WILL PREVAIL WITH SCATTERED CLOUDS WITH BASES 030-040
BASED ON TEMP/DEWPT SPREAD...WITH RESTRICTIONS INSIDE SHOWERS AND
STORMS. 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. 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
SHORT TERM...LGL
LONG TERM...JPT
AVIATION...PM
Hazardous weather outlook, Sep 3, 5:48 AM EDT, 9 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
548 AM 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>014-019-041000-
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-
548 AM 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...TODAY AND TONIGHT.

NUMEROUS THUNDERSTORMS WILL DEVELOP ACROSS THE REGION TODAY AND
TONIGHT. THE MOST WIDESPREAD THREAT WITH THESE 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. AN ISOLATED...WEAK TORNADO
IS ALSO POSSIBLE TODAY...MAINLY IN THE FAR SOUTHERN
MOUNTAINS...NORTHEAST GEORGIA...AND THE WESTERN UPSTATE OF SOUTH
CAROLINA.

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

THE DISSIPATING REMNANTS OF TROPICAL STORM ISAAC WILL CONTINUE TO
MAINTAIN DEEP TROPICAL MOISTURE OVER THE AREA INTO THURSDAY. THIS
WILL RESULT IN HIGH COVERAGE OF HEAVY RAIN SHOWERS AND
THUNDERSTORMS TUESDAY THROUGH WEDNESDAY...AND POSSIBLY INTO
THURSDAY. LOCALIZED FLASH FLOODING IS QUITE POSSIBLE THIS
WEEK...BUT IT REMAINS TOO EARLY TO PIN DOWN A HIGHER RISK AREA FOR
A FLASH FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF LARGE
HAIL...DAMAGING WINDS...TORNADOES OR FLASH FLOODING TO OUR OFFICE.

HG

In the hours before

Special weather statement, Sep 3, 1:08 PM EDT, 2 hours 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
108 PM EDT MON SEP 3 2012

NCZ072-082-031745-
CABARRUS-UNION-
108 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT UNION COUNTY NORTH CAROLINA AND
SOUTHERN CABARRUS COUNTY THROUGH 145 PM EDT...

AT 105 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES NORTHWEST OF MONROE...MOVING NORTHEAST AT
10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  WINGATE...
  UNIONVILLE...
  FAIRVIEW...

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

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 3512 8028 3485 8055 3499 8069 3531 8047
      3529 8043 3528 8044 3519 8050 3517 8044
      3518 8037 3517 8035 3520 8029 3519 8027

LG
Special weather statement, Sep 3, 1:35 PM EDT, 1 hour 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
135 PM EDT MON SEP 3 2012

NCZ070-071-SCZ009-031800-
GASTON-MECKLENBURG-YORK-
135 PM EDT MON SEP 3 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN GASTON...
SOUTHWESTERN MECKLENBURG AND WESTERN YORK COUNTIES THROUGH 200 PM
EDT...

AT 129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SHARON...OR 8 MILES SOUTHWEST OF YORK...
MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  YORK AND CLOVER...

WIND GUSTS UP TO 30 MPH...FREQUENT LIGHTNING AND TORRENTIAL RAIN ARE
EXPECTED WITH THIS STORM.

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.

LAKE WYLIE IS IN THE PATH OF THIS STORM. CLOUD TO GROUND LIGHTNING
AND GUSTY WINDS WILL CREATE DANGEROUS BOATING CONDITIONS. MOVE TO
SHORE IMMEDIATELY.

LAT...LON 3482 8134 3482 8135 3491 8148 3494 8148
      3494 8149 3496 8149 3528 8119 3516 8091

LG
Special weather statement, Sep 3, 2:05 PM EDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
205 PM EDT MON SEP 3 2012

NCZ070-071-SCZ009-031900-
GASTON-MECKLENBURG-YORK-
205 PM EDT MON SEP 3 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN GASTON...
SOUTHWESTERN MECKLENBURG AND YORK COUNTIES THROUGH 300 PM EDT...

AT 202 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES NORTH OF YORK...MOVING NORTHEAST AT 10
MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  CLOVER...
  TEGA CAY...
  LAKE WYLIE...
  CHARLOTTE...

SMALL HAIL...WIND GUSTS UP TO 30 MPH AND TORRENTIAL RAIN ARE EXPECTED
WITH THIS STORM.

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.

LAKE WYLIE IS IN THE PATH OF THIS STORM. CLOUD TO GROUND LIGHTNING
AND GUSTY WINDS WILL CREATE DANGEROUS BOATING CONDITIONS. MOVE TO
SHORE IMMEDIATELY.

LAT...LON 3540 8098 3521 8080 3489 8114 3502 8138

LG
Special weather statement, Sep 3, 2:37 PM EDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
237 PM EDT MON SEP 3 2012

NCZ082-031915-
UNION-
237 PM EDT MON SEP 3 2012

...A STRONG THUNDERSTORM WILL AFFECT UNION COUNTY THROUGH 315 PM
EDT...

AT 234 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MONROE...MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  WINGATE...
  MARSHVILLE...
  UNIONVILLE...

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

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 3505 8029 3481 8048 3491 8072 3518 8050
      3519 8049 3517 8044 3518 8037 3517 8035
      3520 8029 3519 8027

LG
Special weather statement, Sep 3, 2:43 PM EDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
243 PM EDT MON SEP 3 2012

NCZ057-031930-
ROWAN-
243 PM EDT MON SEP 3 2012

...A STRONG THUNDERSTORMS WILL AFFECT ROWAN COUNTY THROUGH 330 PM
EDT...

AT 238 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS NEAR CHINA GROVE...OR 5 MILES WEST OF
SALISBURY...MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  GRANITE QUARRY...
  SALISBURY...
  SPENCER...

SMALL HAIL...WIND GUSTS UP TO 30 MPH AND TORRENTIAL RAIN ARE EXPECTED
WITH THIS STORM.

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 3550 8053 3553 8073 3582 8058 3581 8055
      3578 8053 3578 8050 3575 8045 3574 8045
      3573 8040 3571 8037

LG
Special weather statement, Sep 3, 3:04 PM EDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
304 PM EDT MON SEP 3 2012

NCZ508-510-SCZ003-006-007-012-013-031945-
EASTERN POLK-GREATER GREENVILLE-GREATER RUTHERFORD-GREENVILLE
MOUNTAINS-LAURENS-SPARTANBURG-UNION-
304 PM EDT MON SEP 3 2012

...STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN GREENVILLE...
.NORTHERN LAURENS...NORTHWESTERN UNION...SOUTHEASTERN POLK...
SOUTHERN RUTHERFORD AND SPARTANBURG COUNTIES THROUGH 345 PM EDT...

AT 258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ACROSS WESTERN SPARTANBURG COUNTY...MOVING
NORTHEAST AT 15 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  ROEBUCK...
  INMAN...
  INMAN...
  LANDRUM...
  BOILING SPRINGS SC...
  PACOLET...

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

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 3519 8242 3520 8239 3518 8237 3519 8236
      3519 8232 3520 8226 3525 8227 3536 8203
      3507 8181 3493 8175 3491 8169 3471 8154
      3451 8199

LG

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, 3:20 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, 4:51 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan39 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
Sep 3, 1:35 PM EDTSpecial Weather StatementGSPYork25 min
Sep 3, 2:05 PM EDTSpecial Weather StatementGSPYork55 min
Sep 3, 3:50 PM EDTSpecial Weather StatementGSPAbbeville40 min
Sep 3, 4:32 PM EDTSpecial Weather StatementGSPChester, York43 min
Sep 3, 4:35 PM EDTSpecial Weather StatementGSPAbbeville, Anderson, Greenville, Greenwood, Laurens55 min
Sep 3, 5:05 PM EDTSevere Thunderstorm WarningGSPChester, York40 min
Sep 3, 5:27 PM EDTSpecial Weather StatementGSPUnion48 min
Sep 3, 5:31 PM EDTSpecial Weather StatementGSPGreenville, Laurens44 min
Sep 3, 5:38 PM EDTSevere Thunderstorm WarningGSPAnderson, Greenville, Greenwood, Laurens, Pickens, Spartanburg52 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012Severe Thunderstorm Warnings in South 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.