Alert archive / South Carolina / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 11, NWS Greenville-Spartanburg, SC

February 21, 2014Rutherford County, North Carolina; 6 counties in South Carolina; Elbert County, Hart County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Feb 21, 2014, 6:12 AM EST for Rutherford County, North Carolina; 6 counties in South Carolina; Elbert County, Hart County, Georgia. 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 counties it named.

The facts

Issued: Feb 21, 2014, 6:12 AM EST (11:12 UTC)
Expired: Feb 21, 2014, 7:00 AM EST
In force: 48 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Elbert County, GA, Hart County, GA, Rutherford County, NC, Abbeville County, SC, Anderson County, SC, Greenville County, SC, Laurens County, SC, Pickens County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 33 km from the middle of the area, began a volume at 11:14 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, 11.2 hours before the alert went out and 237 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: 10 J/kg
Mixed-layer CIN: -271 J/kg
Mixed-layer LCL: 1301 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Feb 21, 4:44 AM EST, 1 hour 28 minutes earlier.

Area forecast discussion, Feb 21, 4:44 AM EST, 1 hour 28 minutes before

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Hazardous weather outlook, Feb 21, 5:06 AM EST, 1 hour 6 minutes before

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In the hours before

Special weather statement, Feb 21, 3:26 AM EST, 2 hours 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
326 AM EST FRI FEB 21 2014

NCZ051-058-062-210930-
GRAHAM-MACON-SWAIN-
326 AM EST FRI FEB 21 2014

...STRONG THUNDERSTORMS WILL AFFECT WESTERN SWAIN...NORTHWESTERN
MACON AND GRAHAM COUNTIES THROUGH 430 AM EST...

AT 324 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTH OF
FONTANA VILLAGE TO 15 MILES WEST OF MURPHY...MOVING EAST AT 30 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO AQUONE...
  CHEOAH...DEALS GAP...NANTAHALA...CLINGMANS DOME...SANTEETLAH
  LAKE...FONTANA LAKE...WESSER...TAPOCO...STECOAH...SANTEETLAH...
  ROBBINSVILLE...NEWFOUND GAP...NANTAHALA LAKE...LUADA...KYLE...
  FONTANA VILLAGE AND ALMOND.

WIND GUSTS OF 40 TO 50 MPH...AND TORRENTIAL RAINFALL ARE EXPECTED
WITH THESE STORMS.

THE COMBINATION OF GUSTY WINDS AND WET SOIL CONDITIONS WILL CAUSE
SCATTERED TREES AND POWER LINES TO FALL. SEEK SHELTER INSIDE AN
INTERIOR ROOM.

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 3537 8401 3541 8403 3553 8388 3553 8383
      3557 8377 3557 8349 3567 8334 3566 8330
      3569 8325 3515 8366 3516 8374 3523 8370
      3525 8371 3525 8384 3521 8396 3523 8401
      3531 8404 3536 8404

JOH

Special weather statement, Feb 21, 4:39 AM EST, 1 hour 33 minutes before

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Local storm report, Feb 21, 4:57 AM EST, 1 hour 15 minutes before

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Local storm report, Feb 21, 5:43 AM EST, 29 minutes before

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Special weather statement, Feb 21, 5:51 AM EST, 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 3:26 AM EST	Special Weather Statement	GSP	Graham, Swain	64 min
Feb 21, 3:58 AM EST	Severe Thunderstorm Warning	GSP	Graham, Swain	47 min
Feb 21, 4:30 AM EST	Severe Thunderstorm Warning	GSP	Haywood, Jackson, Macon, Swain	45 min
Feb 21, 6:56 AM EST	Special Weather Statement	GSP	Catawba, Cleveland, Gaston, Lincoln	49 min
Feb 21, 7:40 AM EST	Special Weather Statement	GSP	Catawba, Davie, Gaston, Iredell, Lincoln, Mecklenburg and 1 more	50 min
Feb 21, 8:16 AM EST	Special Weather Statement	GSP	Cabarrus, Davie, Iredell, Mecklenburg, Rowan	44 min
Feb 21, 8:29 AM EST	Special Weather Statement	GSP	Union	46 min
Feb 21, 9:11 AM EST	Areal Flood Advisory	GSP	Cabarrus, Mecklenburg, Union	79 min
Feb 21, 9:14 AM EST	Severe Thunderstorm Warning	GSP	Union	61 min
Feb 21, 4:39 AM EST	Special Weather Statement	GSP	Anderson, Oconee, Pickens	66 min
Feb 21, 5:51 AM EST	Special Weather Statement	GSP	Anderson, Greenville	54 min
Feb 21, 5:59 AM EST	Tornado Warning	GSP	Oconee, Pickens	31 min
Feb 21, 6:39 AM EST	Areal Flood Advisory	GSP	Abbeville, Anderson, Greenville	81 min
Feb 21, 7:44 AM EST	Special Weather Statement	GSP	Chester, Laurens, Union, York	46 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2014 Severe Thunderstorm Warnings in Georgia, 2014 Severe Thunderstorm Warnings in North Carolina, 2014 Every severe thunderstorm warning in 2014

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.