Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Greenville-Spartanburg, SC

March 23, 2012Gaston County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Mar 23, 2012, 4:00 PM EDT for Gaston County, North Carolina. It was in force for 45 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: Mar 23, 2012, 4:00 PM EDT (20:00 UTC)
Expired: Mar 23, 2012, 4:45 PM EDT
In force: 45 min
Issued by: NWS Greenville-Spartanburg, SC

County Gaston County, NC

The radar

The Greer radar (KGSP), 114 km from the middle of the area, began a volume at 20:03 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.0 hours before the alert went out and 135 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: 130 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 23 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Mar 23, 3:55 PM EDT, 5 minutes earlier.

Area forecast discussion, Mar 23, 3:55 PM EDT, 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
355 PM EDT FRI MAR 23 2012

.SYNOPSIS...
A WARM AND MOIST AIR MASS WILL LINGER ACROSS THE REGION TONIGHT
AHEAD OF A COLD FRONT. THE FRONT WILL CROSS THE CAROLINAS AND
NORTHEAST GEORGIA ON SATURDAY...FOLLOWED BY AN UPPER LEVEL LOW ON
SUNDAY. DRY HIGH PRESSURE WILL BUILD ACROSS THE REGION SUNDAY NIGHT
AND WILL REMAIN THROUGH WEDNESDAY.

&&

.NEAR TERM /THROUGH SATURDAY/...
UPPER LOW AND ASSOC SHORTWAVE TROFS CONTINUE MOVG E TOWARD THE
REGION WHILE MOIST S LL FLOW INCREASES OVER THE AREA. SHWRS AND
TSTMS WILL CONTINUE TO DEVELOP AND MOVE NE ACROSS THE CWA THIS
EVE...TAPERING OFF SOMEWHAT OVERNIGHT...THEN REDEVELOPING SAT AS THE
UPPER LOW TRACKS E ACROSS THE CWA ON THE WAY TO THE CAROLINA COAST.
FCST SOUNDINGS SHOW SOME CAPE AND SHEAR THRU THIS EVE BUT SVR THREAT
IS SOMEWHAT LIMITED DUE TO MOIST PROFILES AND WEAK SHEAR. AS THE
UPPER LOW MOVES IN SAT SHEAR/CAPE INCREASE...AND WITH A LITTLE DRY
AIR IN THE MID LVLS THERE WILL BE A HIGHER THREAT OF DAMAGING
WIND/HAIL...MAINLY SAT AFTN-EVE. SPC HAS THE SE CWA IN AN AREA FOR
SLIGHT RISK OF SVR STORMS AND THIS LOOKS REASONABLE. TEMPS WILL
REMAIN ABOVE AVG THRU SAT.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
AS OF 2 PM FRIDAY...ANY CONVECTION THAT DEVELOPS ALONG LEE TROF/COLD
FRONT ACRS THE FTHLS/PIEDMONT SAT AFTN SHUD BE PUSHING EAST OF THE
AREA SAT EVE. THERE MAY BE A LULL IN PRECIP COVERAGE BEHIND THAT
BATCH OF CONVECTION OVERNIGHT BEFORE THE CENTER OF AN UPPER LOW
CROSSES THE AREA EARLY SUN MRNG. AS THE LOW PASSES...ANOTHER ROUND
OF SCATTERED SHWRS SHUD CROSS THE AREA. INSTBY WILL BE ELEV AND
WEAK. SO LTL IN WAY OF THUNDER CHCS EXPECTED. MIN TEMPS STILL ABOVE
NORMAL IN THE 40S MTNS AND LWR-MID 50S PIEDMONT.

SUNDAY...HEIGHT RISES IN WAKE OF UPPER LOW AND STRENGTHENING NWLY
LLVL SHUD PUT END TO PRECIP...SAVE FOR TN BORDER WHERE UPSLOPE WILL
CONTINUE. TEMPS STILL EXPECTED TO BE ABOVE NORMAL AS THICKNESSES
QUICKLY REBOUND BEHIND THE LOW AND ALSO DOWNSLOPE EAST OF THE MTNS
(HIGHS IN THE 60S MTNS AND LWR-MID 70S PIEDMONT).

SUNDAY NIGHT AND MONDAY...AN UPPER LEVEL RIDGE WILL AMPLIFY ACRS THE
CENTER OF THE CONUS...WHILE A TROF DIGS OVER THE NORTHEAST STATES.
THIS AMPLIFYING FLOW WILL ALLOW A STRONG CP AIR MASS TO PUSH INTO
THE EASTERN GREAT LAKES TO THE MID ATLANTIC WITH THE COLD FRONT
APPROACHING THE CWFA FROM THE NORTH. BOTH THE NAM AND GFS HAVE 850
MB TEMPS STILL IN THE 10-12C RANGE WITH DOWNSLOPE NNWLY FLOW. THE
BACKDOOR FRONT MAY PUSH IN MON AFTN...BUT FOR NOW EXPECTING IT TO
REMAIN NORTH OF THE AREA. SO I AM FORECASTING HIGHS IN THE MID-UPR
70S EAST OF THE MTNS (EXCEPT LWR 70S MTN VALLEYS AND 60S HIGH
TERRAIN).

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
AS OF 230 PM FRIDAY...THE LATEST EXTENDED MODELS ARE IN GOOD
AGREEMENT WITH STRONG CANADIAN SURFACE HIGH PRESSURE OVER THE GREAT
LAKES PUSHING INTO OUR FORECAST AREA MONDAY AND LINGER INTO
WEDNESDAY. AS A RESULT...MOSTLY DRY CONDITIONS WITH COOLER
TEMPERATURES CAN BE EXPECTED ACROSS THE REGION THROUGH WEDNESDAY. A
WEAK COLD FRONT IS PROGGED TO CROSS THE CAROLINAS AND NE GEORGIA
WEDNESDAY NIGHT INTO THURSDAY MORNING. BOTH THE GFS AND THE ECMWF
INDICATE THAT THE LOWER PIEDMONT AREA WILL STAY MOSTLY DRY AS THE
UPPER LEVEL DYNAMICS WEAKENS AND THE AIRMASS REMAINS RELATIVELY DRY.
HOWEVER..DECENT LLVL NW FLOW LIFTING ALONG WITH WEAK DIURNAL
INSTABILITY OVER THE NC MOUNTAINS MAY SUPPORT FOR THE DEVELOPMENT OF
SCATTERED SHOWERS AND THUNDERSTORMS DURING THE PASSAGE OF THE FRONT.
HENCE...I MENTIONED 20-30 POPS THERE WITH MOSTLY DRY CONDITIONS
ELSEWHERE. FRIDAY AND SATURDAY...ANOTHER CANADIAN HIGH PRESSURE OVER
THE GREAT LAKES AND SE CANADA IS EXPECTED TO PUSH SOUTH ACROSS THE
REGION FOR MOSTLY DRY WEATHER AND MILD CONDITIONS THROUGH THE
PERIOD.

&&

.AVIATION /20Z FRIDAY THROUGH WEDNESDAY/...
AT KCLT...MAIN CONCERN WILL BE CONVECTION DEVELOPING/MOVG IN LATER
THIS AFTN WITH A CHC OF TSTMS BY 20Z. RESTRICTIONS SHOULD BE LIMITED
TO HEAVIER SHWRS THAT MAY DEVELOP AND MOVE OVER THE FIELD. EXPECT
MVFR CIGS LATER THIS EVE TO LOWER TO IFR AFT 08Z. FOG WILL LIKELY BE
A PROBLEM FOR AT LEAST A COUPLE HOURS AROUND DAYBREAK. CHC OF TSTMS
AGAIN SAT...ESP AFTN.

ELSEWHERE...SIMILAR TO KCLT WITH EARLIER TIMING ON ONSET OF
CONVECTION. EXPECT LIFR/VLIFR AROUND DAYBREAK AT KAVL.

OUTLOOK...SCATTERED TSTMS SHOULD CONTINUE SAT EVE AND SUN AS AN
UPPER LOW CENTER MOVES SLOWLY ACROSS THE REGION. EXPECT IFR
RESTRICTIONS SUN MRNG AND WITH HEAVIER SHWRS AND TSTMS. DRYING IS
EXPECTED EARLY NEXT 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...JOH
NEAR TERM...RB
SHORT TERM...ARK
LONG TERM...JOH
AVIATION...RB

Hazardous weather outlook, Mar 23, 3:40 PM EDT, 20 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
340 PM EDT FRI MAR 23 2012

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-241945-
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-
340 PM EDT FRI MAR 23 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE
REGION AND LINGER THROUGH THE EVENING. A FEW THUNDERSTORMS MAY
PRODUCE HAIL AND GUSTY WINDS ALONG WITH SIGNIFICANT AMOUNTS OF
CLOUD TO GROUND LIGHTNING.

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

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN
ON SATURDAY AND LINGER INTO SUNDAY. SOME OF THESE STORMS MAY
PRODUCE LARGE HAIL DURING THE AFTERNOON AND EARLY EVENING PERIOD.
THE GREATEST POTENTIAL FOR LARGE HAIL WILL LIKELY OCCUR ACROSS
THE FOOTHILLS AND PIEDMONT.

.SPOTTER INFORMATION STATEMENT...

NONE.

ARK

In the hours before

Special weather statement, Mar 23, 2:30 PM EDT, 1 hour 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
230 PM EDT FRI MAR 23 2012

GAZ028-SCZ004-010-231915-
ANDERSON-GREATER OCONEE-HART-
230 PM EDT FRI MAR 23 2012

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN HART...SOUTHEASTERN
OCONEE AND WESTERN ANDERSON COUNTIES THROUGH 315 PM EDT...

AT 228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTH OF FAIR PLAY...OR 8 MILES NORTHWEST
OF HARTWELL...MOVING NORTHEAST AT 10 MPH.

THIS STORM WILL BE NEAR...
  REED CREEK...
  FAIR PLAY...

PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3433 8296 3439 8310 3443 8309 3449 8305
      3452 8308 3473 8300 3466 8284 3464 8283
      3465 8281 3462 8273

ARK

Special weather statement, Mar 23, 3:08 PM EDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
308 PM EDT FRI MAR 23 2012

SCZ006-010-231945-
ANDERSON-GREATER GREENVILLE-
308 PM EDT FRI MAR 23 2012

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL GREENVILLE AND
NORTHEASTERN ANDERSON COUNTIES THROUGH 345 PM EDT...

AT 303 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR POWDERSVILLE...OR 7 MILES SOUTHWEST OF
DOWNTOWN GREENVILLE...MOVING NORTHEAST AT 20 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  WHITE HORSE ROAD AT I-85...
  DOWNTOWN GREENVILLE...
  CHERRYDALE POINT...
  HAYWOOD MALL...

MOTHBALL SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3469 8249 3476 8257 3479 8256 3483 8248
      3483 8249 3489 8249 3497 8244 3484 8223

LANE

Special weather statement, Mar 23, 3:54 PM EDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
354 PM EDT FRI MAR 23 2012

SCZ006-232030-
GREATER GREENVILLE-
354 PM EDT FRI MAR 23 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN GREENVILLE COUNTY
THROUGH 430 PM EDT...

AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES NORTHEAST OF FORK SHOALS...OR 6 MILES
SOUTH SIMPSONVILLE...MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  FOUNTAIN INN...

DIME SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH
THIS STORM.

LAT...LON 3464 8233 3481 8226 3475 8216 3472 8217
      3461 8223 3460 8224

LANE

Special weather statement, Mar 23, 4:00 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
400 PM EDT FRI MAR 23 2012

NCZ069-070-232045-
GASTON-LINCOLN-
400 PM EDT FRI MAR 23 2012

...A STRONG THUNDERSTORM WILL AFFECT EASTERN LINCOLN AND NORTHERN
GASTON COUNTIES THROUGH 445 PM EDT...

AT 355 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR DALLAS...OR 5 MILES NORTHWEST OF GASTONIA...
MOVING NORTHEAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  STANLEY...
  IRON STATION...
  LOWESVILLE...

SMALL HAIL AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3553 8113 3540 8097 3525 8120 3532 8130

JOH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 4:24 PM EDT	Special Weather Statement	GSP	Alexander	36 min
Mar 23, 4:46 PM EDT	Special Weather Statement	GSP	Mecklenburg	29 min
Mar 23, 5:51 PM EDT	Special Weather Statement	GSP	Cleveland	24 min
Mar 23, 6:15 PM EDT	Special Weather Statement	GSP	Catawba, Lincoln	45 min
Mar 23, 6:20 PM EDT	Special Weather Statement	GSP	Caldwell	25 min
Mar 23, 6:31 PM EDT	Special Weather Statement	GSP	Gaston	44 min
Mar 23, 6:59 PM EDT	Special Weather Statement	GSP	Alexander, Iredell	46 min
Mar 23, 7:21 PM EDT	Special Weather Statement	GSP	Mecklenburg	39 min
Mar 23, 3:08 PM EDT	Special Weather Statement	GSP	Greenville	37 min
Mar 23, 3:54 PM EDT	Special Weather Statement	GSP	Greenville	36 min
Mar 23, 4:09 PM EDT	Special Weather Statement	GSP	Abbeville	36 min
Mar 23, 4:37 PM EDT	Special Weather Statement	GSP	Spartanburg	38 min
Mar 23, 4:43 PM EDT	Severe Thunderstorm Warning	GSP	Greenwood, Laurens	52 min
Mar 23, 4:58 PM EDT	Special Weather Statement	GSP	Spartanburg	47 min
Mar 23, 5:31 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, Spartanburg, Union	59 min
Mar 23, 2:30 PM EDT	Special Weather Statement	GSP	Hart	45 min

Nearby

Special Weather Statements in North Carolina, 2012 Every special weather statement 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.