Alert archive / North Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Greenville-Spartanburg, SC

July 31, 2012Swain County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Jul 31, 2012, 9:06 PM EDT for Swain County, North Carolina. It was in force for 39 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 31, 2012, 9:06 PM EDT (01:06 UTC)
Expired
Jul 31, 2012, 9:45 PM EDT
In force
39 min
Issued by
NWS Greenville-Spartanburg, SC

County Swain County, NC

The radar

The Knoxville radar (KMRX), 62 km from the middle of the area, began a volume at 01:10 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.1 hours before the alert went out and 266 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, Peachtre/Fal Fld, GA at 00:00Z on 2012-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 721 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, Peachtre/Fal Fld, GA at 00:00Z on 2012-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 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
721 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
897 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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 31, 8:04 PM EDT, 1 hour 2 minutes earlier.

Area forecast discussion, Jul 31, 8:04 PM EDT, 1 hour 2 minutes before
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Hazardous weather outlook, Jul 31, 8:43 PM EDT, 23 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
843 PM EDT TUE JUL 31 2012

NCZ051-052-058-020045-
SWAIN-HAYWOOD-GRAHAM-
843 PM EDT TUE JUL 31 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TONIGHT.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE IN THE FORECAST
FOR TONIGHT. THE MAIN THREAT FROM ANY STORMS THAT DO DEVELOP WILL BE
CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL. THERE IS A
LINE OF STORMS ACROSS THE GREAT VALLEY IN EASTERN TENNESSEE WHICH
MAY PRODUCING DAMAGING WINDS IN THE SMOKEY MOUNTAINS THIS
EVENING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

GAZ010-017-018-026-028-029-NCZ033-035>037-048>050-053-056-057-059-
062>065-068>072-082-501>510-SCZ001>014-019-020045-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-ALEXANDER-
IREDELL-DAVIE-MADISON-YANCEY-MITCHELL-BUNCOMBE-CATAWBA-ROWAN-
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-
843 PM EDT TUE JUL 31 2012

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

.DAY ONE...TONIGHT.

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE IN THE FORECAST
FOR TONIGHT. THE MAIN THREAT FROM ANY STORMS THAT DO DEVELOP WILL BE
CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

In the hours before

Special weather statement, Jul 31, 9:06 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
906 PM EDT TUE JUL 31 2012

NCZ051-052-010145-
HAYWOOD-SWAIN-
906 PM EDT TUE JUL 31 2012

...STRONG THUNDERSTORMS WILL AFFECT NORTHERN SWAIN AND NORTHWESTERN
HAYWOOD COUNTIES THROUGH 945 PM EDT...

AT 904 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES SOUTHWEST OF
WATERVILLE TO 4 MILES SOUTHEAST OF TOWNSEND...MOVING SOUTH AT 30 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO
  WATERVILLE...SMOKEMONT AND NEWFOUND GAP.

SMALL HAIL...WIND GUSTS UP TO 40 MPH AND TORRENTIAL RAIN ARE EXPECTED
WITH THESE STORMS.

FREQUENT LIGHTNING IS OCCURRING WITH THESE 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 3553 8388 3553 8383 3557 8377 3558 8360
      3557 8349 3567 8334 3566 8330 3573 8324
      3573 8321 3575 8318 3579 8306 3564 8303
      3555 8310 3545 8372 3547 8392

CSH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 9:27 PM EDTSpecial Weather StatementGSPHaywood33 min
Jul 31, 9:35 PM EDTSpecial Weather StatementGSPSwain25 min
Jul 31, 9:54 PM EDTSpecial Weather StatementGSPHaywood36 min
Jul 31, 10:26 PM EDTSpecial Weather StatementGSPTransylvania34 min
Aug 1, 4:22 PM EDTSpecial Weather StatementGSPPolk53 min
Aug 1, 6:01 PM EDTSpecial Weather StatementGSPUnion44 min
Jul 31, 11:16 PM EDTSpecial Weather StatementGSPHabersham, Rabun44 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.