Alert archive / South Carolina / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 283, NWS Greenville-Spartanburg, SC

August 23, 2014Oconee County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 23, 2014, 2:24 PM EDT for Oconee County, South Carolina. It was in force for 66 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: Aug 23, 2014, 2:24 PM EDT (18:24 UTC)
Expired: Aug 23, 2014, 3:30 PM EDT
In force: 66 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

County Oconee County, SC

The radar

The Greer radar (KGSP), 79 km from the middle of the area, began a volume at 18:24 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 12:00Z, 6.4 hours before the alert went out and 203 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: 304 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1414 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -34 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 Aug 23, 2:19 PM EDT, 5 minutes earlier.

Area forecast discussion, Aug 23, 2:19 PM EDT, 5 minutes before

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Hazardous weather outlook, Aug 23, 6:39 AM EDT, 7 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
639 AM EDT SAT AUG 23 2014

GAZ010-017-018-026-028-029-NCZ033-035>037-049-050-053-056-057-
062>065-068>072-082-501>510-SCZ001>014-019-241045-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-ALEXANDER-
IREDELL-DAVIE-YANCEY-MITCHELL-BUNCOMBE-CATAWBA-ROWAN-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-
639 AM EDT SAT AUG 23 2014

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

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE WESTERN CAROLINAS
AND NORTHEAST GEORGIA THIS AFTERNOON AND WILL LINGER INTO TONIGHT.
COVERAGE IS EXPECTED TO BE THE GREATEST ACROSS THE NORTH CAROLINA
FOOTHILLS AND PIEDMONT AS A BACKDOOR COLD FRONT ARRIVES THIS
EVENING. THESE STORMS WILL PRODUCE FREQUENT CLOUD TO GROUND
LIGHTNING WITH HEAVY DOWNPOURS. A FEW STORMS COULD PRODUCE
DAMAGING WINDS OR LARGE HAIL. ISOLATED FLASH FLOODING MAY OCCUR
ACROSS URBAN AREAS AND AREAS NEAR THE ESCARPMENT.

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

..SUNDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..WEDNESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..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...OR FLASH FLOODING TO OUR OFFICE.

NCZ048-051-052-058-059-241045-
MADISON-SWAIN-HAYWOOD-GRAHAM-NORTHERN JACKSON-
639 AM EDT SAT AUG 23 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE WESTERN NORTH
CAROLINA MOUNTAINS THIS AFTERNOON AND WILL LINGER INTO TONIGHT.
THESE STORMS WILL PRODUCE FREQUENT CLOUD TO GROUND LIGHTNING WITH
HEAVY DOWNPOURS. A FEW STORMS COULD PRODUCE DAMAGING WINDS OR
LARGE HAIL.

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

..SUNDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..WEDNESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..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...OR FLASH FLOODING TO OUR OFFICE.

NED

In the hours before

Special weather statement, Aug 23, 2:12 PM EDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
212 PM EDT SAT AUG 23 2014

NCZ064-SCZ001-002-005-231900-
GREATER PICKENS-OCONEE MOUNTAINS-PICKENS MOUNTAINS-TRANSYLVANIA-
212 PM EDT SAT AUG 23 2014

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN PICKENS...
NORTHEASTERN OCONEE AND SOUTHWESTERN TRANSYLVANIA COUNTIES THROUGH
300 PM EDT...

AT 211 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR LAKE JOCASSEE...OR 17 MILES NORTHWEST OF
PICKENS...MOVING SOUTH AT 10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  LAKE JOCASSEE...
  DEVILS FORK STATE PARK...
  KEOWEE TOXAWAY STATE PARK...
  SALEM...

WIND GUSTS UP TO 40 MPH...PEA SIZE HAIL...AND TORRENTIAL RAINFALL
ARE EXPECTED WITH THIS STORM.

LAT...LON 3503 8301 3505 8305 3507 8305 3510 8302
      3513 8286 3482 8273 3479 8289 3481 8290
      3478 8294 3476 8302 3502 8307

HG

Special weather statement, Aug 23, 2:20 PM EDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
220 PM EDT SAT AUG 23 2014

SCZ001-004-231900-
GREATER OCONEE-OCONEE MOUNTAINS-
220 PM EDT SAT AUG 23 2014

...A STRONG THUNDERSTORM WILL AFFECT OCONEE COUNTY THROUGH 300 PM
EDT...

AT 220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR WALHALLA...MOVING SOUTH AT 10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  WESTMINSTER...

DIME SIZE HAIL...WIND GUSTS UP TO 40 MPH AND TORRENTIAL RAINFALL ARE
EXPECTED WITH THIS STORM.

LAT...LON 3456 8312 3456 8314 3458 8316 3459 8315
      3459 8317 3461 8316 3461 8320 3484 8323
      3488 8301 3458 8289 3454 8311

HG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 8:33 PM EDT	Special Weather Statement	GSP	Avery	42 min
Aug 22, 8:53 PM EDT	Special Weather Statement	GSP	Mecklenburg	52 min
Aug 22, 9:53 PM EDT	Special Weather Statement	GSP	Rowan	67 min
Aug 22, 9:58 PM EDT	Special Weather Statement	GSP	Mecklenburg	47 min
Aug 22, 10:46 PM EDT	Areal Flood Advisory	GSP	Gaston, Lincoln, Mecklenburg	2 hr
Aug 22, 10:50 PM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg	40 min
Aug 22, 11:02 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	43 min
Aug 22, 11:10 PM EDT	Special Weather Statement	GSP	Cabarrus	65 min
Aug 22, 11:26 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Rowan	49 min
Aug 22, 11:45 PM EDT	Special Weather Statement	GSP	Cabarrus	30 min
Aug 22, 11:56 PM EDT	Special Weather Statement	GSP	Union	49 min
Aug 23, 2:56 PM EDT	Special Weather Statement	GSP	Polk	49 min
Aug 23, 5:09 PM EDT	Special Weather Statement	GSP	Cleveland	51 min
Aug 23, 6:23 PM EDT	Special Weather Statement	GSP	Caldwell	52 min
Aug 23, 7:06 PM EDT	Special Weather Statement	GSP	Burke	39 min
Aug 23, 7:07 PM EDT	Special Weather Statement	GSP	Iredell	53 min
Aug 23, 7:48 PM EDT	Special Weather Statement	GSP	Catawba	57 min
Aug 23, 2:12 PM EDT	Special Weather Statement	GSP	Pickens	48 min
Aug 23, 2:20 PM EDT	Special Weather Statement	GSP	Oconee	40 min
Aug 23, 3:03 PM EDT	Areal Flood Advisory	GSP	Oconee	117 min
Aug 23, 3:05 PM EDT	Special Weather Statement	GSP	Greenville	40 min
Aug 23, 3:19 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Spartanburg	56 min
Aug 23, 3:32 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Greenville, Laurens	58 min
Aug 23, 3:44 PM EDT	Special Weather Statement	GSP	Cherokee	46 min
Aug 23, 4:08 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens, Spartanburg	52 min
Aug 23, 4:29 PM EDT	Special Weather Statement	GSP	Laurens	46 min
Aug 23, 4:46 PM EDT	Special Weather Statement	GSP	Union	74 min
Aug 23, 5:01 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, Spartanburg, Union	44 min
Aug 23, 3:20 PM EDT	Special Weather Statement	GSP	Franklin	40 min

Nearby

Severe Thunderstorm Warnings in South 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.