Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Greenville-Spartanburg, SC

July 21, 2012Buncombe County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Jul 21, 2012, 4:43 PM EDT for Buncombe County, North Carolina. It was in force for 32 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 21, 2012, 4:43 PM EDT (20:43 UTC)
Expired
Jul 21, 2012, 5:15 PM EDT
In force
32 min
Issued by
NWS Greenville-Spartanburg, SC

County Buncombe County, NC

The radar

The Greer radar (KGSP), 78 km from the middle of the area, began a volume at 20:45 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, 8.7 hours before the alert went out and 254 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 2012-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 679 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 2012-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
679 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
870 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
69 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 Jul 21, 3:36 PM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 21, 3:36 PM EDT, 1 hour 7 minutes before
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Hazardous weather outlook, Jul 21, 12:38 PM EDT, 4 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1238 PM EDT SAT JUL 21 2012

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-221645-
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-
1238 PM EDT SAT JUL 21 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 THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE SLOWLY
ACROSS THE AREA THIS AFTERNOON AND EVENING. THE STRONGEST STORMS
HAVE THE POTENTIAL TO PRODUCE SMALL AREAS OF DAMAGING DOWNBURST
WINDS. LARGE HAIL IS POSSIBLE BUT LESS LIKELY. STRONG GUSTY WINDS
AND CLOUD TO GROUND LIGHTNING ARE POSSIBLE WITH ANY STORM. LOCALLY
HEAVY RAINFALL IS LIKELY...AND COULD LEAD TO FLOODING...ESPECIALLY
LOCATIONS WHERE STORMS REPEATEDLY MOVE OVER.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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 21, 2:46 PM EDT, 1 hour 57 minutes before
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Special weather statement, Jul 21, 3:12 PM EDT, 1 hour 31 minutes before
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Special weather statement, Jul 21, 3:38 PM EDT, 1 hour 5 minutes before
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Special weather statement, Jul 21, 3:49 PM EDT, 54 minutes before
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Special weather statement, Jul 21, 4:12 PM EDT, 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
412 PM EDT SAT JUL 21 2012

NCZ052-212045-
HAYWOOD-
412 PM EDT SAT JUL 21 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN HAYWOOD COUNTY THROUGH
445 PM EDT...

AT 411 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES NORTHEAST OF SUNBURST...OR 6 MILES EAST
OF WAYNESVILLE...MOVING SOUTHEAST AT 15 MPH. A SECOND STRONG
THUNDERSTORM WAS BETWEEN MAGGIE VALLEY AND LAKE JUNALUSKA. THESE
THUNDERSTORMS WILL IMPACT THE AREAS FROM WAYNESVILLE TO SUNBURST TO
CRUSO THROUGH 445 PM.

PEA SIZE HAIL...FREQUENT LIGHTNING...WIND GUSTS UP TO 40 MPH...AND
TORRENTIAL RAIN ARE EXPECTED WITH THESE STORMS. RAPID RISES ON
STREAMS AND CREEKS ARE EXPECTED...WITH ISOLATED FLOODING OF LOW
LYING AREAS POSSIBLE.

LAT...LON 3551 8278 3547 8280 3544 8278 3542 8275
      3541 8274 3538 8279 3532 8283 3530 8290
      3534 8296 3556 8315 3564 8302

HG
Special weather statement, Jul 21, 4:43 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
443 PM EDT SAT JUL 21 2012

NCZ052-053-212115-
BUNCOMBE-HAYWOOD-
443 PM EDT SAT JUL 21 2012

...STRONG THUNDERSTORMS WILL AFFECT EASTERN HAYWOOD AND SOUTHWESTERN
BUNCOMBE COUNTIES THROUGH 515 PM EDT...

AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES EAST OF CANTON...OR 13 MILES WEST OF
DOWNTOWN ASHEVILLE...MOVING EAST AT 20 MPH. OTHER STRONG
THUNDERSTORMS WERE DEVELOPING FARTHER WEST ALONG INTERSTATE 40
TOWARD LAKE JUNALUSKA AND ALSO NEAR COVE CREEK.

THESE THUNDERSTORMS MAY PRODUCE PEA SIZE HAIL...FREQUENT
LIGHTNING...WIND GUSTS UP TO 40 MPH...AND TORRENTIAL RAINFALL
THROUGH 515 PM. THE ACTIVITY SHOULD SPREAD EASTWARD THROUGH CANDLER
TOWARD ASHEVILLE AND BILTMORE FOREST OVER THE NEXT HALF HOUR.

LAT...LON 3565 8245 3544 8246 3544 8253 3543 8254
      3544 8255 3544 8257 3544 8263 3546 8267
      3545 8271 3547 8301 3568 8294

HG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 11:42 PM EDTSpecial Weather StatementGSPAvery, Madison, Mitchell, Yancey93 min
Jul 21, 2:46 PM EDTSpecial Weather StatementGSPMcDowell29 min
Jul 21, 3:12 PM EDTSpecial Weather StatementGSPSwain33 min
Jul 21, 3:38 PM EDTSpecial Weather StatementGSPDavie37 min
Jul 21, 4:12 PM EDTSpecial Weather StatementGSPHaywood33 min
Jul 21, 5:09 PM EDTSpecial Weather StatementGSPRutherford36 min
Jul 21, 5:41 PM EDTSpecial Weather StatementGSPCatawba34 min
Jul 21, 5:43 PM EDTSpecial Weather StatementGSPUnion47 min
Jul 21, 5:50 PM EDTSevere Thunderstorm WarningGSPUnion21 min
Jul 21, 5:58 PM EDTSpecial Weather StatementGSPBurke32 min
Jul 21, 6:08 PM EDTSpecial Weather StatementGSPIredell37 min
Jul 21, 6:14 PM EDTSevere Thunderstorm WarningGSPAlexander, Catawba, Iredell61 min
Jul 21, 6:19 PM EDTSpecial Weather StatementGSPCatawba26 min
Jul 21, 6:26 PM EDTAreal Flood AdvisoryGSPAlexander, Burke, Caldwell, Catawba, Iredell2 hr
Jul 21, 6:29 PM EDTSpecial Weather StatementGSPIredell31 min
Jul 21, 6:36 PM EDTFlash Flood WarningGSPAlexander, Burke, Caldwell, Catawba105 min
Jul 21, 6:50 PM EDTSpecial Weather StatementGSPCaldwell25 min
Jul 21, 6:57 PM EDTAreal Flood AdvisoryGSPIredell73 min
Jul 21, 7:11 PM EDTFlash Flood WarningGSPIredell60 min
Jul 21, 7:16 PM EDTSpecial Weather StatementGSPDavie29 min
Jul 21, 7:19 PM EDTSpecial Weather StatementGSPDavie26 min
Jul 20, 8:30 PM EDTSpecial Weather StatementGSPPickens30 min
Jul 20, 9:29 PM EDTSpecial Weather StatementGSPGreenville31 min
Jul 21, 3:49 PM EDTSpecial Weather StatementGSPAnderson26 min
Jul 21, 10:25 AM EDTAreal Flood AdvisoryGSPElbert2 hr
Jul 21, 5:40 PM EDTSpecial Weather StatementGSPElbert35 min

Nearby

Special Weather Statements in North Carolina, 2012Every 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.