Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 459, NWS Greenville-Spartanburg, SC

July 24, 20124 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 24, 2012, 5:02 PM EDT for 4 counties in North Carolina. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 24, 2012, 5:02 PM EDT (21:02 UTC)
Expired
Jul 24, 2012, 6:00 PM EDT
In force
58 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon

Counties Avery County, NC, Madison County, NC, Mitchell County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 106 km from the middle of the area, began a volume at 21:03 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 24, 2:36 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.0 hours before the alert went out and 210 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 2012-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1441 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 2012-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 square meters per square second.193958Sfc1 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
1441 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1104 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

864 
WUUS52 KGSP 242102
SVRGSP
NCC011-115-121-199-242200-
/O.NEW.KGSP.SV.W.0459.120724T2102Z-120724T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
502 PM EDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AVERY COUNTY IN WESTERN NORTH CAROLINA...
  EASTERN MADISON COUNTY IN WESTERN NORTH CAROLINA...
  MITCHELL COUNTY IN WESTERN NORTH CAROLINA...
  YANCEY COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 600 PM EDT

* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM BANNER ELK TO 6 MILES NORTH OF
  MARS HILL...AND MOVING SOUTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  MARS HILL...INGALLS AND BURNSVILLE.
  SPRUCE PINE AND MICAVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3601 8177 3597 8184 3600 8190 3594 8196
      3577 8258 3605 8265 3606 8262 3604 8259
      3597 8260 3596 8256 3602 8245 3610 8239
      3614 8225 3617 8222 3615 8215 3611 8212
      3613 8204 3627 8193
TIME...MOT...LOC 2102Z 336DEG 29KT 3611 8186 3590 8257

$$

KRENTZ
3 follow-up statements
420 
WWUS52 KGSP 242124
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
524 PM EDT TUE JUL 24 2012

NCC011-115-121-199-242200-
/O.CON.KGSP.SV.W.0459.000000T0000Z-120724T2200Z/
AVERY NC-MADISON NC-MITCHELL NC-YANCEY NC-
524 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR YANCEY...
MITCHELL...EAST CENTRAL MADISON AND AVERY COUNTIES UNTIL 600 PM
EDT...

AT 518 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM LINVILLE TO MARS HILL...MOVING
SOUTH AT 35 MPH.

SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  SPRUCE PINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3601 8178 3597 8184 3600 8190 3594 8196
      3580 8248 3599 8249 3602 8245 3610 8239
      3614 8224 3617 8221 3615 8215 3611 8212
      3611 8208 3613 8203 3627 8193
TIME...MOT...LOC 2124Z 345DEG 28KT 3605 8181 3584 8252

$$

KRENTZ
933 
WWUS52 KGSP 242140
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
540 PM EDT TUE JUL 24 2012

NCC011-115-242150-
/O.CAN.KGSP.SV.W.0459.000000T0000Z-120724T2200Z/
AVERY NC-MADISON NC-
540 PM EDT TUE JUL 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL MADISON
AND AVERY COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THIS 
AREA.

LAT...LON 3615 8218 3615 8215 3611 8212 3611 8208
      3600 8205 3598 8206 3592 8202 3582 8241
      3599 8249 3603 8244 3610 8239 3614 8224
      3617 8221
TIME...MOT...LOC 2140Z 349DEG 17KT 3601 8190 3580 8261

$$

NCC121-199-242200-
/O.CON.KGSP.SV.W.0459.000000T0000Z-120724T2200Z/
MITCHELL NC-YANCEY NC-
540 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
YANCEY AND MITCHELL COUNTIES UNTIL 600 PM EDT...

AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM LINVILLE TO MARS HILL...MOVING
SOUTH AT 20 MPH.

SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  SPRUCE PINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3615 8218 3615 8215 3611 8212 3611 8208
      3600 8205 3598 8206 3592 8202 3582 8241
      3599 8249 3603 8244 3610 8239 3614 8224
      3617 8221
TIME...MOT...LOC 2140Z 349DEG 17KT 3601 8190 3580 8261

$$

KRENTZ
788 
WWUS52 KGSP 242151
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
551 PM EDT TUE JUL 24 2012

NCC121-199-242201-
/O.EXP.KGSP.SV.W.0459.000000T0000Z-120724T2200Z/
MITCHELL NC-YANCEY NC-
551 PM EDT TUE JUL 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN YANCEY AND MITCHELL
COUNTIES WILL EXPIRE AT 600 PM EDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THIS
AREA.

LAT...LON 3615 8218 3615 8215 3611 8212 3611 8208
      3600 8205 3598 8206 3592 8202 3582 8241
      3599 8249 3603 8244 3610 8239 3614 8224
      3617 8221
TIME...MOT...LOC 2151Z 349DEG 17KT 3596 8189 3575 8260

$$

KRENTZ

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 Jul 24, 4:38 PM EDT, 24 minutes earlier.

Area forecast discussion, Jul 24, 4:38 PM EDT, 24 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
438 PM EDT TUE JUL 24 2012

.SYNOPSIS...
A WEAK UPPER LEVEL RIDGE WILL BUILD ACROSS THE REGION TONIGHT AND
PERSIST THROUGH THURSDAY. A COLD FRONT IS THEN EXPECTED TO MOVE
ACROSS THE CAROLINAS AND NORTHEAST GEORGIA ON LATE FRIDAY INTO
SATURDAY. ANOTHER RIDGE OF HIGH PRESSURE BUILDS BACK IN SUN AND
REMAINS THROUGH EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
AS OF 420 PM...THE MCS MOVING SOUTH INTO NORTHEAST TENN/NORTHWEST NC
CONTINUES TO LOSE SOME STEAM AS IT ENCOUNTERS HIGHER STABILITY OVER
THESE AREAS...THE RESULT OF AN OUTFLOW BOUNDARY THAT MOVED THROUGH
THE AREA EARLIER TODAY. MEANWHILE...DENSE CIRRUS CANOPY AHEAD OF THE
MCS TO OUR NORTH IS PREVENTING MUCH IN THE WAY OF AIR MASS RECOVERY.
AS SUCH...I FEEL THAT THE SEVERE WEATHER THREAT IS DIMINISHING
ACROSS THE NC FOOTHILLS AND PIEDMONT ATTM. HOWEVER...THE AIR MASS
OVER THE CENTRAL/SOUTHERN MTNS IS STILL VERY UNSTABLE. THEREFORE...
I WOULD NOT BE SURPRISED IF THE OUTFLOW REINVIGORATES OVER THIS AREA
EARLY THIS EVENING. ANOTHER POSSIBLE AREA FOR SEVERE CONVECTION WILL
BE ACROSS THE UPSTATE AND NORTHEAST GEORGIA...WHERE THE AIR MASS IS
ALSO QUITE UNSTABLE. HOWEVER...WITH THE WEAK SHEAR IN PLACE ACROSS
THIS AREA...ANY SEVERE WEATHER IS EXPECTED TO BE MORE PULSE IN
NATURE.

LATER TONIGHT A WEAK SFC BNDRY WILL MOVE IN FROM THE NORTHEAST. OR
IT MAY SIMPLY BE A MODEL REFLECTION OF EXTENSIVE OUTFLOW BNDRYS.
EITHER WAY...THE NAM KEEPS QUITE A BIT OF CAPE OVER THE REGION
TONIGHT...AND SHRA/TSTMS MAY PERSIST IN SPOTS MUCH OF THE NIGHT. THE
BEST CHANCES WILL PROBABLY BE ALONG THE TN LINE WHERE NW FLOW WILL
GIVE AN OROGRAPHIC BOOST TO CONVECTION. IN THESE AREAS I/VE
MAINTAINED CHANCE POPS THROUGH THE NIGHT...THOUGH ELSEWHERE I TAKE
THEM INTO THE SLIGHT CHANCE RANGE AFTER THE INITIAL ROUNDS OF
CONVECTION.

THE NAM POOLS HIGH DEWPOINTS AND QUITE A BIT OF CAPE OVER THE FA ON
WEDNESDAY. SPC HAS PLACED THE REGION UNDER A 5 PERCENT SEVERE RISK.
THE DEEP LAYER RIDGE WILL TRY TO NOSE BACK INTO THE FA...BUT THE
AMOUNT OF INSTABILITY AND WEAK SFC CONVERGENCE SHOULD SUPPORT GOOD
CONVECTIVE COVERAGE OVER THE WESTERN CAROLINAS AND NE GA DURING THE
AFTN HOURS. SOME OF THESE WILL PROBABLY REACH PULSE SEVERE LIMITS
WITH SMALL AREAS OF WIND DAMAGE AND LARGE HAIL. MAX TEMPS WILL RUN A
COUPLE CATEGORIES ABOVE NORMAL.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/...
AS OF 220 PM EDT TUESDAY...SHORT RANGE MODELS INDICATE THAT THE MID
LEVEL RIDGE WILL BUILD OVER THE REGION ON THURSDAY. H85 TEMPS WITHIN
THE LEE OF THE MOUNTAINS INCREASE TO AROUND 24C DURING THE
AFTERNOON. A WEAK SUBSIDENCE IS EXPECTED TO DEVELOP BETWEEN H7 TO
H8...YIELDING AN SHALLOW LAYER OF CIN BETWEEN 10 TO 30 J/KG. IT
APPEARS THAT WEAK LEE TROF MAY DEEPEN SLIGHTLY WITH WEST H85
FLOW...BUT SFC MOISTURE CONVERGENCE SHOULD REMAIN WEAK. COVERAGE OF
DIURNAL CONVECTION SHOULD BE LIMITED BY AFTERNOON MIXING OF SFC
DEWPOINTS AND PERSISTENT WEAK CAPPING. I WILL FORECAST MID AFTERNOON
INITIATION ACROSS THE RIDGES...WITH CHC POPS INTO THE EARLY EVENING.
COVERAGE EAST OF THE MTNS SHOULD REMAIN LIMITED TO A SCHC. THE MAIN
CONCERN ON THURSDAY WILL BE THE HOT AFTERNOON TEMPERATURES. USING A
BLEND OF MOS...HIGH TEMPERATURES ARE FORECAST TO RANGE FROM AROUND
90 WITHIN THE MTN VALLEYS TO U90S EAST...3 TO 5 DEGREES LOWER THAN
RECORDS. HOWEVER...EVEN WITH MIXING DEWPOINTS...HEAT INDEX VALUES
NEAR THE CLT METRO MAY MEET HEAT ADVISORY CRITERIA.

ON FRIDAY...A WEAK COLD FRONT IS EXPECTED TO MOVE ACROSS THE
SOUTHERN APPALACHIANS DURING THE AFTERNOON. THE ENVIRONMENT AHEAD OF
THE FRONT IS EXPECTED TO DEVELOP CAPE VALUES BETWEEN 1500 TO 2000
J/KG WITH LITTLE TO NO CIN. IN ADDITION...UPPER DIVERGENCE MAY
DEVELOP OVER THE REGION AS THE CORE OF A H3 JET PUSHES ACROSS PA.
GIVEN THE APPROACH OF THE SFC FRONT...WIDESPREAD INSTABILITY...AND
UPPER SUPPORT...I WILL FORECAST LIKELY POPS ACROSS THE MTNS AND 30
TO 40 POPS EAST. SEVERE MULTICELL THUNDERSTORMS MAY DEVELOP ALONG
AND AHEAD OF THE FRONT.

HEAT WILL REMAIN A CONCERN ACROSS THE PIEDMONT AS DEWPOINTS RECOVER
TO THE U60S AND HIGHS ONCE AGAIN REACH INTO THE U90S. HEAT INDEX
VALUES ALONG AND EAST OF I-85 MAY REACH HEAT ADVISORY CRITERIA.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
AS OF 2 PM EDT TUESDAY...THE LATEST MEDIUM RANGE MODELS CONTINUE TO
INDICATE THAT A COLD FRONT WILL MOVE ACROSS THE AREA ON LATE FRI/SAT
AS AN UPPER TROF DEEPENS OVER THE EAST COAST. THE FRONT IS EXPECTED
TO STALL OVER SOUTH OF THE AREA SUN AND DISSIPATES MON AS A RIDGE
BUILDS IN FROM THE SE. THE STRONGEST UPPER FORCING WILL REMAIN NORTH
OF THE AREA...HOWEVER GOOD OVERALL DYNAMICAL LIFT AND H3 DIV ALONG
WITH PLENTY OF LLVL INSTABILITY WILL BE AVAILABLE FOR SCATTERED
DIURNAL TSTMS EACH DAY THROUGH THE PERIOD. POPS WERE MAINTAINED AT
NEAR CLIMO...HOWEVER IF THIS PATTERN AND S/W TIMING PERSISTS OVER
THE NEXT COUPLE MODEL RUNS...AN INCREASE IN POPS WILL BE WARRANTED
FOR FRI/SAT. SUN LOOKS TO BE THE DRIEST DAY WITH FAIRLY STRONG HIGH
PRESSURE BUILDING IN...YET THE FRONT WILL REMAIN JUST TO THE
SOUTH...SO SLIGHT CHANCE POPS WERE MENTIONED THROUGH THE DAY. MON
WILL BE ACTIVE AGAIN AS ANOTHER SHOT OF UPPER ENERGY ROUNDS THE WRN
RIDGE AND TRAVERSES THE REGION. TEMPERATURES WILL BE NEAR...OR A
COUPLE DEGREES ABOVE NORMAL FRI/SAT. WITH NW/LY FLOW SETTING UP
SUN...EXPECT A COUPLE DEGREES COOLER IN THE MTNS SUN/MON. YET...A
GOOD DOWNSLOPE WARMING COMPONENT WILL ENABLE MAXES RIGHT AROUND
NORMAL OVER THE LOWER PIEDMONT.

&&

.AVIATION /21Z TUESDAY THROUGH SUNDAY/...
AT KCLT...HAVE HELD ON TO TEMPO GROUP FOR CONVECTION FROM 20-22 UTC
THIS AFTN. TSTMS ARE MOVING INTO THE NC MTNS ATTM. HOWEVER...THEY
HAVE LOST SOME OF THEIR ORGANIZATION. I STILL THINK THEY WILL
ORGANIZE AS THEY EMERGE INTO THE FOOTHILLS AND CONFIDENCE IS STILL
GOOD IN A SQUALL LINE LATER IN THE AFTN. WINDS WILL PROBABLY AVERAGE
FROM THE WNW THE REST OF THE AFTN...THOUGH THEY MAY BACK TO THE WSW
AT TIMES. THEY WILL TURN MORE OUT OF THE NORTH BEHIND A WEAK COLD
FRONT LATE TONIGHT. WHILE NOTHING HAS BEEN CARRIED IN THE
TAF...THERE ARE INDICATIONS THAT SHRA/TSTM ACTIVITY COULD BE IN THE
VCNTY MUCH OF THE NIGHT.

ELSEWHERE...SCT TSTMS WILL CONTINUE TO DEVELOP ACROSS THE REGION
THIS AFTN. A STRONG SQUALL LINE IS EXPECTED TO DROP ACROSS THE
REGION THIS EVENING. FOR NOW I/M JUST GOING TO CARRY VCTS FOR
SEVERAL HOURS...BUT AS THE LINE GETS CLOSER WE SHOULD BE ABLE TO ADD
A PERIOD OF TEMPO OR PREVAILING THUNDER. A WEAK COLD FRONT WILL
STALL OVER THE REGION LATE TONIGHT...AND THIS MAY ALLOW SCT
SHRA/TSTMS TO LAST INTO THE MORNING HOURS...THOUGH FOR NOW THAT
HASN/T BEEN CARRIED IN THE TAF. WINDS WILL BE WSW TO W OVER THE
UPSTATE AND NW OVER WRN NC. WINDS LATER TONIGHT WILL BECOME LIGHT OR
SHIFT TO LIGHT OUT OF THE NORTH BEHIND THE FRONT AND THUNDERSTORM
COMPLEXES.

OUTLOOK...EXPECT SOLID CHC CONVECTION WED AFTERNOON AND EVENING.
BEST CHC OF OVERNIGHT RESTRICTIONS WILL BE IN AREAS THAT SEE LOCALLY
HEAVY RAIN. A COLD FRONT MAY BRING MORE WIDESPREAD CONVECTION FRI
AND FRI NIGHT.

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...JDL/MCAVOY
SHORT TERM...NED
LONG TERM...JOH
AVIATION...MCAVOY
Hazardous weather outlook, Jul 24, 2:52 PM EDT, 2 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
252 PM EDT TUE JUL 24 2012

GAZ010-017-018-026-028-029-NCZ048-051>053-058-059-062>065-509-510-
SCZ001>007-010>013-019-251900-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-MADISON-SWAIN-HAYWOOD-
BUNCOMBE-GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-
HENDERSON-POLK MOUNTAINS-EASTERN POLK-OCONEE MOUNTAINS-
PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-GREATER OCONEE-
GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-ANDERSON-ABBEVILLE-
LAURENS-UNION SC-GREENWOOD-
252 PM EDT TUE JUL 24 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THUNDERSTORMS ARE EXPECTED TO ORGANIZE INTO ONE OR MORE LINES
ACROSS TENNESSEE AND WEST VIRGINIA TODAY. THESE ORGANIZED AREAS OF
STORMS WILL THEN SWEEP TO THE SOUTHEAST AND AFFECT WESTERN NORTH
CAROLINA THIS AFTERNOON AND UPSTATE SOUTH CAROLINA AND PARTS OF
NORTHEAST GEORGIA LATE THIS AFTERNOON AND EVENING.

IT/S LOOKING INCREASINGLY LIKELY THAT AREAS OF WIDESPREAD
STRAIGHT-LINE WIND DAMAGE WILL ACCOMPANY THE STRONGER STORMS. AN
ISOLATED TORNADO IS EVEN POSSIBLE. THE AREAS WITH THE GREATEST
LIKELIHOOD OF SEEING SEVERE STORMS WILL INCLUDE THE CENTRAL NORTH
CAROLINA MOUNTAINS AS WELL AS THE NORTHERN UPSTATE OF SOUTH
CAROLINA.

A CONSIDERABLE AMOUNT OF CLOUD TO GROUND LIGHTNING AND SOME LARGE
HAIL WILL ALSO OCCUR WITH THE LARGER THUNDERSTORM COMPLEXES.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A WEAK STATIONARY FRONT WILL HELP TO TRIGGER ADDITIONAL
THUNDERSTORMS OVER WESTERN NORTH CAROLINA AND NORTHEAST GEORGIA ON
WEDNESDAY. THERE WILL NOT BE NEARLY AS MUCH WIND SHEAR AS ON
TUESDAY...BUT SOME OF THE STORMS WILL STILL BE CAPABLE OF
PRODUCING LARGE HAIL AND DAMAGING WINDS.

HOT AND HUMID CONDITIONS ARE EXPECTED ALONG AND EAST OF THE
INTERSTATE 85 CORRIDOR ON THURSDAY AND FRIDAY. HEAT INDEX VALUES
MAY EXCEED 103 DEGREES DURING THE MID TO LATE AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

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

NCZ033-035>037-049-050-056-057-068>072-082-501>508-SCZ008-009-014-
251900-
AVERY-ALEXANDER-IREDELL-DAVIE-YANCEY-MITCHELL-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-CHEROKEE-YORK-CHESTER-
252 PM EDT TUE JUL 24 2012

...SEVERE THUNDERSTORM WATCH 512 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR 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.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A WEAK STATIONARY FRONT WILL HELP TO TRIGGER ADDITIONAL
THUNDERSTORMS OVER WESTERN NORTH CAROLINA AND NORTHEAST GEORGIA ON
WEDNESDAY. THERE WILL NOT BE NEARLY AS MUCH WIND SHEAR AS ON
TUESDAY...BUT SOME OF THE STORMS WILL STILL BE CAPABLE OF
PRODUCING LARGE HAIL AND DAMAGING WINDS.

HOT AND HUMID CONDITIONS ARE EXPECTED ALONG AND EAST OF THE
INTERSTATE 85 CORRIDOR AND ACROSS THE CHARLOTTE METRO AREA
THURSDAY AND FRIDAY. HEAT INDEX VALUES MAY EXCEED 103 DEGREES
DURING THE MID TO LATE AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

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

NED

In the hours before

Special weather statement, Jul 24, 1:50 PM EDT, 3 hours 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
150 PM EDT TUE JUL 24 2012

NCZ064-SCZ002-003-005-006-241830-
GREATER GREENVILLE-GREATER PICKENS-GREENVILLE MOUNTAINS-PICKENS
MOUNTAINS-TRANSYLVANIA-
150 PM EDT TUE JUL 24 2012

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TRANSYLVANIA...
NORTHEASTERN PICKENS AND NORTHWESTERN GREENVILLE COUNTIES THROUGH 230
PM EDT...

AT 148 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF BREVARD...MOVING SOUTHEAST
AT 25 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO JONES GAP
  STATE PARK...FURMAN UNIVERSITY...TABLE ROCK RESERVOIR...ROSMAN...
  CEDAR MOUNTAIN...BREVARD...TRAVELERS REST...TIGERVILLE...
  PUMPKINTOWN...MARIETTA...DACUSVILLE...CLEVELAND AND CAESARS HEAD.

SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3531 8279 3521 8260 3517 8259 3515 8258
      3516 8255 3516 8251 3505 8231 3486 8250
      3517 8292

07
Special weather statement, Jul 24, 2:35 PM EDT, 2 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
235 PM EDT TUE JUL 24 2012

NCZ033-050-241915-
AVERY-MITCHELL-
235 PM EDT TUE JUL 24 2012

...A STRONG THUNDERSTORM WILL AFFECT AVERY AND EASTERN MITCHELL
COUNTIES THROUGH 315 PM EDT...

AT 234 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTH OF HAMPTON...OR 8 MILES SOUTH OF
ELIZABETHTON...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  BULADEAN...

SMALL HAIL...AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3615 8181 3611 8180 3609 8176 3599 8188
      3599 8191 3586 8205 3613 8228 3617 8220
      3615 8218 3615 8215 3611 8212 3611 8208
      3613 8203 3623 8196

07
Special weather statement, Jul 24, 4:34 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
434 PM EDT TUE JUL 24 2012

NCZ049-050-242115-
MITCHELL-YANCEY-
434 PM EDT TUE JUL 24 2012

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN YANCEY AND WESTERN
MITCHELL COUNTIES THROUGH 515 PM EDT...

AT 430 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES SOUTHEAST OF LIMESTONE COVE...OR 10 MILES
EAST OF ERWIN...MOVING SOUTH AT 10 MPH.

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

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 3615 8218 3615 8215 3615 8214 3611 8212
      3588 8214 3592 8244 3612 8237 3614 8230
      3614 8225 3617 8222

KRENTZ
Special weather statement, Jul 24, 4:52 PM EDT, 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
452 PM EDT TUE JUL 24 2012

SCZ014-242115-
CHESTER-
452 PM EDT TUE JUL 24 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CHESTER COUNTY
THROUGH 515 PM EDT...

AT 450 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR FORT LAWN...OR 8 MILES SOUTHWEST OF
LANCASTER...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  FISHING CREEK RESERVOIR...
  GREAT FALLS RESERVOIR...

PEOPLE IN SOUTHEASTERN CHESTER COUNTY...INCLUDING THE FOLLOWING
LOCATIONS...

FORT LAWN...FISHING CREEK RESERVOIR...GREAT FALLS RESERVOIR...GREAT
FALLS AND CEDAR CREEK RESERVOIR...

SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE
WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE
WEATHER THREATEN.

PEA SIZE HAIL AND WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3467 8088 3465 8089 3455 8087 3454 8088
      3454 8092 3469 8099 3474 8087 3474 8086
      3470 8085

NED

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 11:55 PM EDTSpecial Weather StatementGSPMecklenburg35 min
Jul 24, 12:37 AM EDTSpecial Weather StatementGSPUnion53 min
Jul 24, 12:48 AM EDTSevere Thunderstorm WarningGSPMecklenburg, Union40 min
Jul 24, 1:41 AM EDTSpecial Weather StatementGSPUnion49 min
Jul 24, 1:37 PM EDTSevere Thunderstorm WarningGSPAvery, Burke, Caldwell53 min
Jul 24, 1:50 PM EDTSpecial Weather StatementGSPTransylvania40 min
Jul 24, 2:35 PM EDTSpecial Weather StatementGSPAvery, Mitchell40 min
Jul 24, 4:34 PM EDTSpecial Weather StatementGSPMitchell41 min
Jul 24, 5:09 PM EDTSpecial Weather StatementGSPJackson51 min
Jul 24, 5:37 PM EDTSpecial Weather StatementGSPPolk38 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.