Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 448, NWS Greenville-Spartanburg, SC

July 20, 2012Davie County, Rowan County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 20, 2012, 5:42 PM EDT for Davie County, Rowan County, North Carolina. It was in force for 48 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 20, 2012, 5:42 PM EDT (21:42 UTC)
Expired: Jul 20, 2012, 6:30 PM EDT
In force: 48 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Davie County, NC, Rowan County, NC

The radar

The Roanoke radar (KFCX), 143 km from the middle of the area, began a volume at 21:43 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.7 hours before the alert went out and 60 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 629 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 79 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.

363 
WUUS52 KGSP 202142
SVRGSP
NCC059-159-202230-
/O.NEW.KGSP.SV.W.0448.120720T2142Z-120720T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
542 PM EDT FRI JUL 20 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DAVIE COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  CENTRAL ROWAN COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 630 PM EDT

* AT 540 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
  SALISBURY...AND MOVING NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL IMPACT LOCATIONS NEAR...
  SALISBURY AND GRANITE QUARRY.
  SPENCER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL CAN CAUSE MAJOR PROPERTY DAMAGE...ESPECIALLY TO VEHICLES.
DAMAGING WINDS MAY BLOW DOWN SCATTERED TREES AND POWER LINES. SEEK
SHELTER INSIDE AN INTERIOR ROOM.

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 3554 8057 3569 8069 3591 8037 3589 8036
      3588 8039 3585 8038 3582 8046 3579 8047
      3577 8045 3574 8045 3573 8034 3571 8032
      3568 8033 3566 8030
TIME...MOT...LOC 2142Z 235DEG 14KT 3566 8054

$$

HG

1 follow-up statement

074 
WWUS52 KGSP 202222
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
622 PM EDT FRI JUL 20 2012

NCC059-159-202231-
/O.EXP.KGSP.SV.W.0448.000000T0000Z-120720T2230Z/
DAVIE NC-ROWAN NC-
622 PM EDT FRI JUL 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ROWAN AND SOUTHEASTERN
DAVIE COUNTIES WILL EXPIRE AT 630 PM EDT...

AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATD THAT 
THE STORM WHICH PROMPTED THE WARNING WAS WEAKENING BELOW SEVERE 
LEVELS. HOWEVER...GUSTY WINDS TO 35 MPH AND HEAVY RAIN ARE STILL 
POSSIBLE WITH THIS THUNDERSTORM NORTH OF SALISBURY TO SPENCER.

LAT...LON 3554 8057 3569 8069 3591 8037 3589 8036
      3588 8039 3585 8038 3582 8046 3579 8047
      3577 8045 3574 8045 3573 8034 3571 8032
      3568 8033 3566 8030
TIME...MOT...LOC 2221Z 234DEG 22KT 3572 8045

$$

HG

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 20, 4:56 PM EDT, 46 minutes earlier.

Area forecast discussion, Jul 20, 4:56 PM EDT, 46 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
456 PM EDT FRI JUL 20 2012

.SYNOPSIS...
A COLD FRONT WILL APPROACH FROM THE NORTHWEST TODAY AND ARRIVE ON
SATURDAY. THE FRONT IS EXPECTED TO STALL OVER THE AREA THROUGH THE
WEEKEND BEFORE DISSIPATING MONDAY.

&&

.NEAR TERM /THROUGH SATURDAY/...
AT 435 PM...NUMEROUS TO WIDESPREAD CONVECTION CONTINUES TO MOVE EAST
ACROSS THE SOUTHEAST QUADRANT OF THE FORECAST AREA. POPS HAVE BEEN
INCREASED TO HIGH LIKELY/CATEGORICAL FOR THE NEXT COUPLE OF HOURS.
MORNING RAOBS INDICATED SIGNIFICANT MOISTENING OF THE ENTIRE
TROPOSPHERE HAS OCCURRED OVER THE PAST 24 HOURS...AND DCAPE IS VERY
LOW AS A RESULT. IN ADDITION...FREEZING LEVELS ARE EXTREMELY HIGH...
ABOVE 15 KFT AGL. THEREFORE...THE SEVERE RISK DOESNT APPEAR TO BE AS
HIGH AS THE PAST FEW DAYS. IN FACT...WITH THE VERY MOIST AIR MASS...
HEAVY RAIN MAY BE THE MAIN CONCERN...ESPECIALLY IN URBAN AREAS
(INCLUDING CHARLOTTE METRO). HOWEVER...MEAN 0-6 KM FLOW OF 10-15 KT
IS ALLOWING CELLS TO MOVE ALONG STEADILY...SO TRAINING OF CELLS WILL
LIKELY BE NECESSARY TO PRODUCE FLASH FLOODING.

FURTHER WEST AND NORTH ACROSS THE FORECAST AREA...THE AIR MASS IS
COMPARATIVELY STABLE...OWING TO EXTENSIVE EARLY DAY CLOUD COVER. AS
SUCH...ONLY ISOLATED (AT BEST) CELLS WERE DEVELOPING IN THESE AREAS.
WE HAVE THEREFORE SCALED POPS BACK QUITE A BIT ACROSS FAR WESTERN NC
AND MUCH OF THE NORTHERN UPSTATE...WHILE HOLDING ON TO HEALTHY POPS
ACROSS THE SOUTHERN UPSTATE/NORTHEAST GEORGIA PIEDMONT...WHERE
INSTABILITY REMAINS HIGH. POPS WILL GRADUALLY RAMP UP OVER THE MTNS
TOWARD EARLY EVENING...TO ACCOUNT FOR CONVECTION CURRENTLY MOVING
ACROSS EAST TENN/EASTERN KENTUCKY.

OTHERWISE... MODELS IN PRETTY GOOD AGREEMENT REGARDING EVOLUTION OF
MID AND UPPER LEVEL FEATURES THROUGH DAYTIME SATURDAY. AT 500 MB...
LARGE RIDGE PERSISTS OVER WESTERN U.S. WITH BERMUDA HIGH OVER
ATLANTIC. 500 MB TROUGH EXTENDING DOWN EAST COAST INTO OUR CWA
PERSISTS THROUGH SATURDAY... BUT IT WITHDRAWS SLOWLY TO THE NORTH
LEAVING A SHEAR AXIS BEHIND. SHORT WAVE TROUGH CROSSING CWA THIS
AFTERNOON AND THIS EVENING WILL MAINTAIN SURFACE LOW ON FRONTAL
BOUNDARY ACROSS MID-ATLANTIC REGION. LOW WILL BE OFFSHORE SATURDAY
MORNING AND CONTINUE MOVING EAST THEREAFTER. BERMUDA HIGH BUILDS
SLOWLY WESTWARD AS 500 MB HEIGHTS INCREASE JUST A BIT. THIS WILL
MAKE SOUTHWARD MOVEMENT OF FRONTAL BOUNDARY VERY DIFFICULT TO
MAINTAIN. MOIST SOUTHWEST FLOW AHEAD OF THE FRONT ON WEST SIDE OF
BERMUDA HIGH WORKS IN COMBINATION WITH THE WEAK UPPER-LEVEL TROUGH/
SHEAR AXIS TO CONTINUE A MOIST SOUTHWEST FLOW INTO OUR AREA.
FORECASTS FOR OVERNIGHT AND SATURDAY ACCORDINGLY WILL CARRY POPS FOR
SHOWERS AND THUNDERSTORMS.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
AT 230 PM EDT FRIDAY...AN UPPER TROUGH AXIS WILL REMAIN ALONG THE
EAST COAST FROM SATURDAY NIGHT THROUGH MONDAY...WHILE A RIDGE
REMAINS OVER THE PLAINS. A WEAKENING...STALLED SURFACE FRONT WILL
REMAIN OVER OUR AREA THROUGH MONDAY. ALTHOUGH THERE DOES NOT APPEAR
TO BE MUCH ISENTROPIC UPGLIDE OVER THE BOUNDARY...SHORTWAVES MOVING
INTO THE UPPER TROUGH AND OVER THE VICINITY OF THE FRONT WILL
SUPPORT PRECIPITATION THROUGH THE PERIOD...MAXIMIZED WITH GREATER
INSTABILITY DURING DAYLIGHT HOURS. WITHOUT A STRONG LIFTING
MECHANISM...PRECIPITATION AMOUNTS ARE EXPECTED TO BE MODERATE...BUT
SEVERAL DAYS OF RAIN COULD LEAD TO SOME LOCALIZED HYDROLOGICAL
PROBLEMS WITH TIME. MINIMUM TEMPERATURES WILL BE SLIGHTLY ABOVE
NORMAL...AND MAXIMUM TEMPERATURES NEAR NORMAL.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
AS OF 145 PM FRIDAY...THE CWFA WILL BE IN AN AREA BETWEEN RIDGING TO
THE SOUTH AND WEST AND NW TO SE ORIENTED NRN STREAM FLOW TO THE
NORTH. THE FLOW WILL BE CLOSE ENUF THAT WE SHUD SEE SOME EFFECT FROM
A SERIES OF WEAK SHORT WAVES MOVING THRU THE FLOW. AT THE SFC...A
BACK DOOR COLD FRONT WILL APPROACH THE AREA BUT STALL TO OUR NORTH.
A SERIES OF LOW PRESSURE WAVES WILL MOVE WEST ALONG THE FRONT. OVER
OUR CWFA...A LEE TROF AND COPIOUS LOW LEVEL MOISTURE WILL REMAIN IN
PLACE THRU THE PERIOD. THIS SHUD LEAD TO GENERALLY SCT DIURNAL
CONVECTION EACH DAY. LOWS WILL BE NEARLY STEADY AROUND 5 DEGREES
ABOVE NORMAL. HIGHS START OUT NEARLY 5 DEGREES ABOVE NORMAL THEN
FALL A COUPLE OF DEGREES BY THE END OF THE PERIOD.

&&

.AVIATION /21Z FRIDAY THROUGH WEDNESDAY/...
AT KCLT... SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE IN THE
VICINITY OF THE TERMINAL THROUGH 00Z. THUNDERSTORMS WILL BE CAPABLE
OF STRONG AND GUSTY WIND AND SMALL HAIL. AFTER 02Z... CEILING 4-6 KT
FT LOWERING TO NEAR 2K FT AROUND 12Z. POSSIBILITY EXISTS OF
VISIBILITY NEAR 5 MI IN FOG AROUND SUNRISE. CONSIDERABLE CLOUDINESS
WILL MAKE RADIATIONAL COOLING DIFFICULT... SO VISIBILITY RESTRICTION
NOT CURRENTLY IN TAF DUE TO UNCERTAINTY. EXCEPT NEAR
THUNDERSTORMS... SURFACE WIND WILL BE SOUTHWEST LESS THAN 10 KT.

REMAINDER TERMINALS... 4-6K FT BROKEN TO OVERCAST. VISIBILITY
UNRESTRICTED EXPECT VICINITY SCATTERED THUNDERSTORMS... MOST
NUMEROUS NEAR KAND... KGMU... AND KGSP. AFT 02Z... SHOWERS AND
THUNDERSTORMS BECOME MORE WIDELY SCATTERED. TOWARD SUNRISE... SOME
LOWER CEILING 2-4 KT FT AND POSSIBILITY OF VISIBILITY RESTRICTION IN
FOG... ESPECIALLY VICINITY KAVL.

OUTLOOK...AS A COLD FRONT STALLS OVER THE AREA...SCATTERED TO
NUMEROUS CONVECTIVE STORMS AND ASSOCIATED RESTRICTIONS WILL PERSIST
THROUGH THE WEEKEND. LATE NIGHT/MORNING FOG AND LOW STRATUS
PROBABILITIES WILL ALSO REMAIN FAIRLY HIGH...ESPECIALLY IN THE MTN
VALLEYS. THUNDERSTORMS WILL BECOME LESS NUMEROUS AS BERMUDA HIGH
BUILDS INTO THE REGION DURING THE FIRST PART OF THE WEEK.

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...JAT
NEAR TERM...JDL/LGL
SHORT TERM...JAT
LONG TERM...RWH
AVIATION...LGL

Hazardous weather outlook, Jul 20, 4:21 PM EDT, 1 hour 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
421 PM EDT FRI JUL 20 2012

GAZ018-026-028-029-NCZ035>037-056-057-068>072-082-SCZ004>014-019-
212030-
STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-DAVIE-CATAWBA-ROWAN-
CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC-
GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-
CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
421 PM EDT FRI JUL 20 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
PIEDMONT OF THE WESTERN CAROLINAS AND NORTHEAST GEORGIA INTO THE
EVENING. A FEW OF THESE STORMS COULD BECOME SEVERE WITH LARGE HAIL
AND DAMAGING STRAIGHT-LINE WINDS THE MAIN THREATS. PERIODS OF
HEAVY RAIN WILL ALSO DEVELOP WITH AT LEAST MINOR FLOODING LIKELY
IN FLOOD PRONE AREAS. MORE SERIOUS FLOODING IS POSSIBLE...
ESPECIALLY IF SEVERAL STORMS TRAIN OVER THE SAME AREAS.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

GAZ010-017-NCZ033-048>053-058-059-062>065-501>510-SCZ001>003-212030-
RABUN-HABERSHAM-AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-
GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-
HENDERSON-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-
421 PM EDT FRI JUL 20 2012

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

.DAY ONE...TONIGHT.

ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE MOUNTAINS OF THE
CAROLINAS AND NORTHEAST GEORGIA EARLY THIS EVENING...WITH CLOUD
TO GROUND LIGHTNING AND GUSTY WINDS THE MAIN THREAT. A LINE OF
SCATTERED THUNDERSTORMS COULD DROP SOUTH INTO THE AREA LATER THIS
EVENING. IF THESE STORMS HOLD TOGETHER...AN ISOLATED SEVERE STORM
WITH DAMAGING WINDS IS POSSIBLE.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 20, 3:46 PM EDT, 1 hour 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
346 PM EDT FRI JUL 20 2012

SCZ009-014-202015-
CHESTER-YORK-
346 PM EDT FRI JUL 20 2012

...STRONG THUNDERSTORMS WILL AFFECT NORTHERN CHESTER AND YORK
COUNTIES THROUGH 415 PM EDT...

AT 346 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF
YORK TO 3 MILES SOUTH OF YORK TO 4 MILES WEST OF LOWRYS...MOVING EAST
AT 15 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  MCCONNELLS...
  CLOVER...
  ROCK HILL...

PEA SIZE HAIL...FREQUENT LIGHTNING...WIND GUSTS UP TO 40 MPH...AND
TORRENTIAL RAIN ARE EXPECTED WITH THESE STORMS.

LAT...LON 3480 8105 3471 8142 3494 8133 3508 8141
      3512 8140 3516 8122 3515 8106 3512 8104
      3506 8106 3505 8103 3508 8098 3502 8095

HG

Special weather statement, Jul 20, 4:02 PM EDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
402 PM EDT FRI JUL 20 2012

NCZ070-071-SCZ009-202030-
GASTON-MECKLENBURG-YORK-
402 PM EDT FRI JUL 20 2012

...STRONG THUNDERSTORMS WILL AFFECT EASTERN YORK...SOUTHEASTERN
GASTON AND SOUTHWESTERN MECKLENBURG COUNTIES THROUGH 430 PM EDT...

AT 402 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES SOUTHWEST OF
LAKE WYLIE TO 3 MILES WEST OF ROCK HILL TO 3 MILES NORTHEAST OF
LOWRYS...MOVING NORTHEAST AT 15 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  LAKE WYLIE...
  TEGA CAY...
  ROCK HILL...

PEA SIZE HAIL...FREQUENT LIGHTNING...WIND GUSTS UP TO 40 MPH...AND
TORRENTIAL RAIN ARE EXPECTED WITH THESE STORMS.

LAT...LON 3503 8077 3500 8084 3505 8089 3501 8090
      3495 8086 3491 8086 3482 8092 3482 8125
      3491 8116 3513 8120 3529 8088 3508 8072

HG

Special weather statement, Jul 20, 4:20 PM EDT, 1 hour 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
420 PM EDT FRI JUL 20 2012

NCZ071-072-082-202045-
CABARRUS-MECKLENBURG-UNION-
420 PM EDT FRI JUL 20 2012

...STRONG THUNDERSTORMS WILL AFFECT MECKLENBURG...SOUTHWESTERN
CABARRUS AND WESTERN UNION COUNTIES THROUGH 445 PM EDT...

AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF
LAKE WYLIE TO 3 MILES NORTH OF FORT MILL TO 3 MILES NORTHWEST OF
CATAWBA...MOVING EAST AT 15 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  PINEVILLE...
  PAW CREEK...
  CENTER CITY CHARLOTTE...

PEA SIZE HAIL...FREQUENT LIGHTNING...WIND GUSTS UP TO 40 MPH AND
TORRENTIAL RAIN ARE EXPECTED WITH THESE STORMS. THE HEAVY RAINFALL
MAY FLOOD AREAS WITH POOR DRAINAGE...SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS ANY FLOODED
ROADWAYS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE
RAPIDLY. SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.

FLOOD ADVISORIES...OR FLASH FLOOD WARNINGS...COULD BE ISSUED FOR
CHARLOTTE OVER THE NEXT HOUR.

LAT...LON 3484 8053 3481 8079 3494 8079 3511 8094
      3505 8103 3509 8105 3511 8104 3515 8105
      3515 8101 3517 8100 3526 8101 3543 8066
      3526 8045 3519 8050 3517 8041

HG

Special weather statement, Jul 20, 4:39 PM EDT, 1 hour 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
439 PM EDT FRI JUL 20 2012

NCZ071-072-202115-
CABARRUS-MECKLENBURG-
439 PM EDT FRI JUL 20 2012

...STRONG THUNDERSTORMS WILL AFFECT MECKLENBURG AND WESTERN CABARRUS
COUNTIES THROUGH 515 PM EDT...

AT 439 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES SOUTHEAST OF
PAW CREEK TO 3 MILES SOUTHWEST OF EASTLAND MALL TO 3 MILES WEST OF
WEDDINGTON...MOVING EAST AT 15 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  I-77 AT I-85...
  EASTLAND MALL...
  MINT HILL...
  UNC CHARLOTTE...

PEA SIZE HAIL...TORRENTIAL RAINFALL...WIND GUSTS UP TO 40 MPH...AND
FREQUENT LIGHTNING ARE EXPECTED WITH THESE STORMS.

LAT...LON 3519 8050 3521 8055 3503 8077 3503 8080
      3500 8084 3511 8094 3517 8096 3532 8098
      3550 8066 3523 8046

HG

Special weather statement, Jul 20, 5:17 PM EDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
517 PM EDT FRI JUL 20 2012

NCZ057-071-072-202145-
CABARRUS-MECKLENBURG-ROWAN-
517 PM EDT FRI JUL 20 2012

...STRONG THUNDERSTORMS WILL AFFECT CABARRUS...NORTHEASTERN
MECKLENBURG AND ROWAN COUNTIES THROUGH 545 PM EDT...

AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CORNELIUS TO 3 MILES
NORTHEAST OF HARRISBURG TO FAIRVIEW...MOVING NORTHEAST AT 20 MPH.

THESE STORMS WILL IMPACT LOCATIONS NEAR...
  MIDLAND...
  MOUNT PLEASANT...

PEA SIZE HAIL...TORRENTIAL RAINFALL...FREQUENT LIGHTNING...AND WIND
GUSTS UP TO 40 MPH AND TORRENTIAL RAIN ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3550 8030 3519 8050 3521 8055 3513 8065
      3532 8072 3546 8094 3549 8095 3552 8090
      3550 8075 3555 8074 3560 8075 3573 8046
      3556 8023 3550 8021

HG

Special weather statement, Jul 20, 5:39 PM EDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
539 PM EDT FRI JUL 20 2012

NCZ057-202215-
ROWAN-
539 PM EDT FRI JUL 20 2012

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ROWAN COUNTY THROUGH 615
PM EDT...

AT 539 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF SALISBURY...MOVING NORTHEAST
AT 20 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  SALISBURY...
  SPENCER...
  HIGH ROCK LAKE...

DIME SIZE HAIL...FREQUENT LIGHTNING...WIND GUSTS OF 40 TO 50
MPH...AND TORRENTIAL RAIN ARE EXPECTED WITH THIS STORM.

LAT...LON 3553 8056 3568 8068 3579 8050 3575 8045
      3574 8045 3572 8038 3573 8034 3571 8032
      3568 8033 3567 8030 3565 8029

HG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:24 PM EDT	Special Weather Statement	GSP	Alexander, Avery, Burke, Caldwell, McDowell, Mitchell and 1 more	51 min
Jul 19, 8:55 PM EDT	Special Weather Statement	GSP	Buncombe, Haywood, Madison	65 min
Jul 19, 9:04 PM EDT	Special Weather Statement	GSP	Union	26 min
Jul 19, 9:27 PM EDT	Special Weather Statement	GSP	Alexander, Burke, Caldwell, Catawba, Davie, Iredell	63 min
Jul 19, 9:55 PM EDT	Special Weather Statement	GSP	Alexander, Burke, Catawba, Cleveland, Lincoln, McDowell and 2 more	65 min
Jul 19, 10:15 PM EDT	Special Weather Statement	GSP	Graham, Swain	60 min
Jul 19, 10:49 PM EDT	Special Weather Statement	GSP	Buncombe	26 min
Jul 19, 10:54 PM EDT	Special Weather Statement	GSP	Catawba, Cleveland, Gaston, Lincoln, Rutherford	51 min
Jul 19, 11:40 PM EDT	Special Weather Statement	GSP	Henderson	35 min
Jul 20, 3:10 PM EDT	Special Weather Statement	GSP	Union	35 min
Jul 20, 3:29 PM EDT	Special Weather Statement	GSP	Mecklenburg	31 min
Jul 20, 4:20 PM EDT	Special Weather Statement	GSP	Mecklenburg, Union	25 min
Jul 20, 4:32 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	118 min
Jul 20, 4:39 PM EDT	Special Weather Statement	GSP	Mecklenburg	36 min
Jul 20, 4:54 PM EDT	Flash Flood Warning	GSP	Mecklenburg	3 hr
Jul 20, 5:17 PM EDT	Special Weather Statement	GSP	Cabarrus, Rowan	28 min
Jul 20, 5:39 PM EDT	Special Weather Statement	GSP	Rowan	36 min
Jul 20, 6:37 PM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg, Rowan, Union	53 min
Jul 20, 7:46 PM EDT	Special Weather Statement	GSP	Union	44 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012 Every 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.