Alert archive / South Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 480, NWS Greenville-Spartanburg, SC

June 26, 2011Anderson County, Oconee County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 26, 2011, 5:23 PM EDT for Anderson County, Oconee County, Pickens County, South Carolina. It was in force for 67 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: Jun 26, 2011, 5:23 PM EDT (21:23 UTC)
Expired: Jun 26, 2011, 6:30 PM EDT
In force: 67 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Anderson County, SC, Oconee County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 57 km from the middle of the area, began a volume at 21:24 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 26, 1:36 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.4 hours before the alert went out and 216 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: 1451 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1040 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 40 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 Jun 26, 2:34 PM EDT, 2 hours 49 minutes earlier.

Area forecast discussion, Jun 26, 2:34 PM EDT, 2 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
234 PM EDT SUN JUN 26 2011

.SYNOPSIS...
A WEAK STATIONARY FRONT WILL DRIFT BACK TO THE NORTH AND DISSIPATE
MONDAY. A STRONGER COLD FRONT WILL APPROACH FROM THE NORTHWEST ON
TUESDAY AND SHOULD MOVE SOUTHEAST THROUGH THE AREA TUESDAY NIGHT OR
WEDNESDAY MORNING. HIGH PRESSURE WILL BUILD BACK OVER THE AREA FROM
THE MIDDLE THROUGH THE END OF THE WEEK.

&&

.NEAR TERM /THROUGH MONDAY/...
AS OF 1815Z...THINK THE OVERALL LACK OF STRONG INSTABILITY THIS
AFTERNOON SHOULD LIMIT COVERAGE OF COLD-POOL CONVECTION...SO
PIEDMONT POPS WILL BE MAINTAINED IN THE 30-40 PERCENT RANGE ACROSS
THE UPPER/WESTERN PIEDMONT...TO 20 TO 30 PERCENT FURTHER SOUTHEAST.
IN LIGHT OF THE STABILIZING AIR ACROSS THE MTNS...POPS HAVE BEEN
LOWERED TO THE CHANCE RANGE. HOWEVER...THE FAR WESTERN MTNS ARE
BEGINNING TO CLEAR OUT...AND SHOULD RECOVER SUFFICIENTLY TO INITIATE
NEW SCATTERED CONVECTION LATER TODAY...SO CHANCES WILL REMAIN IN THE
40 TO 50 PERCENT RANGE.

FOR TONIGHT...LINGERING CYCLONIC MID/UPPER FLOW WILL RESULT IN
CONTINUED CHANCES FOR ISLD/SCT CONVECTION (MAINLY SHOWERS) THROUGH
THE OVERNIGHT. CONVECTIVE DEBRIS IS EXPECTED TO INHIBIT COOLING
SOMEWHAT...SO MIN TEMPS SHOULD AVERAGE A LITTLE ABOVE NORMAL.

FOR MONDAY...THE SHORT TERM MODELS ARE NONE-TOO THRILLED WITH
DIURNAL CONVECTIVE CHANCES TOMORROW. THIS APPEARS TO BE RELATED TO
RISING HEIGHTS AND INCREASINGLY ANTICYCLONIC UPPER FLOW. ALSO...
SHEAR WILL BE WEAKENING...LOWERING THE POTENTIAL FOR COLD POOL
ORGANIZATION. NEVERTHELESS...HOT TEMPERATURES (LOWER-MID 90S) SHOULD
RESULT IN AT LEAST MODERATE INSTABILITY DURING THE AFTERNOON...SO
FEEL THAT IT IS PRUDENT TO HOLD ON TO INHERITED CHANCE POPS.
HOWEVER...WE DID LOWER THESE TO 30 PERCENT IN MOST AREAS.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/...
AS OF 230 PM SUNDAY...MODELS IN DECENT AGREEMENT PUSHING THE COLD
FRONT ACROSS THE AREA TUE-TUE EVE...THEN OFF SE OF THE AREA TUE
NIGHT-WED. A WEAK SHORTWAVE ALOFT COMBINED WITH LOW LEVEL
CONVERGENCE ALONG THE FRONT AND TEMPS WARMING INTO THE MID 90S E OF
THE MTNS...EXPECT SOLID CHC POPS ACROSS THE CWA TUE-TUE EVE...
TAPERING OFF FROM THE NW TUE NIGHT. HIGH PRES RIDGES INTO THE CWA
FROM THE N WED AND HAVE SLIGHT CHC POPS DIMINISHING FROM THE N AS
THE FRONT CONTINUES TO EXIT TO THE SE. HIGH WILL BE COOLER WED AFTN
BUT STILL ABOVE AVG.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/...
AS OF 230 PM SUNDAY...UPPER RIDGE AXIS OVER THE S PLAINS WED
NIGHT-THU WILL MOVE E OVER THE S MS VALLEY FRI-SAT BEFORE MOVG BACK
TO THE W ON SUN. AFTER COOLING TO NEAR AVG WED NIGHT...HIGH PRES
WILL RIDGE OVER THE AREA FROM THE NE DURING THE DAY THU...THEN FROM
THE E TO SE THRU SAT. WITH SLY LOW LEVEL FLOW KEEPING SOME MOISTURE
OVER THE REGION HELD ON TO A SLIGHT CHC OF MAINLY MTN SHWRS/TSTMS
EACH AFTN-EARLY EVE. EXPECT TEMPS TO BE ABOVE AVG THRU THE PD.

&&

.AVIATION /19Z SUNDAY THROUGH FRIDAY/...
AT KCLT...THE MAIN CONCERN THIS PERIOD WILL BE THE THREAT FOR
CONVECTION...IN ASSOCIATION WITH OUTFLOW BOUNDARY PUSHING OUT OF THE
MTNS ATTM. THE AIRMASS OVER THE PIEDMONT STILL IS NOT ALL THAT
UNSTABLE...AND IN FACT NEW STORMS ARE STRUGGLING TO GET THEIR ACT
TOGETHER ACROSS THE FOOTHILLS. NEVERTHELESS...EXPECT SCATTERED
STORMS TO EVENTUALLY GET INTENSIFY ACROSS THE FOOTHILLS AND FAR
WESTERN PIEDMONT...AND MOVE GRADUALLY TOWARD KCLT BY EARLY EVENING.
A CB HAS BEEN INCLUDED FOR THE TIME BEING...AND WILL INTRODUCE
SOMETHING MORE DEFINITIVE AS THIS AFTERNOON/S RADAR TRENDS DICTATE.
OTHERWISE...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED THROUGH THE
PERIOD.

ELSEWHERE...SCATTERED CONVECTION IS FIRING NEAR THE BLUE RIDGE IN
ASSOCIATION WITH OUTFLOW BOUNDARY MOVING OUT OF THE MTNS. SINCE IT
IS ALREADY CLOSE TO MOST OF OUR SC TERMINALS...AND KHKY/KAVL...HAVE
STARTED OUT THE PERIOD WITH A CB GROUP. BY 19Z OR SO...EXPECT VCTS
AT THE SC TERMINALS...AS THESE LOCATIONS ARE LOCATED WITHIN THE MOST
UNSTABLE AIRMASS. AT KHKY/KAVL...THE CLOUDS AND COOLER AIR WEST OF
THE OUTFLOW BOUNDARY MAY PRECLUDE MUCH IN THE WAY OF ACTIVE TS
ACTIVITY NEARBY. HOWEVER...SHOWERS APPEAR LIKELY...ESP AT KAVL.
OTHERWISE...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED THROUGH THE
PERIOD.

OUTLOOK...GOOD CHANCE OF AFTERNOON STORMS CONTINUING THROUGH AT
LEAST MID-WEEK. IN ADDITION...SOME MORNING FOG WILL BE
POSSIBLE...ESP IN THE MTN VALLEYS.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...NONE.
SC...NONE.

&&

SYNOPSIS...TJB
NEAR TERM...JDL
SHORT TERM...RB
LONG TERM...RB
AVIATION...JDL

Hazardous weather outlook, Jun 26, 1:45 PM EDT, 3 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
145 PM EDT SUN JUN 26 2011

GAZ010-017-018-026-028-029-NCZ036-037-056-057-068>072-082-508-510-
SCZ001>014-019-271745-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-IREDELL-DAVIE-CATAWBA-
ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC-
GREATER RUTHERFORD-EASTERN POLK-OCONEE MOUNTAINS-PICKENS MOUNTAINS-
GREENVILLE MOUNTAINS-GREATER OCONEE-GREATER PICKENS-
GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-ANDERSON-ABBEVILLE-
LAURENS-UNION SC-CHESTER-GREENWOOD-
145 PM EDT SUN JUN 26 2011

...SEVERE THUNDERSTORM WATCH 556 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

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.

NCZ033-035-048>053-058-059-062>065-501>506-271745-
AVERY-ALEXANDER-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-
GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-
HENDERSON-CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-
GREATER BURKE-MCDOWELL MOUNTAINS-EASTERN MCDOWELL-
145 PM EDT SUN JUN 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO REDEVELOP OVER THE
WESTERN CAROLINA MOUNTAINS LATER THIS AFTERNOON. ALTHOUGH THE
MAIN THREATS WITH THIS ACTIVITY WILL BE FROM LOCALLY HEAVY
RAINFALL AND CLOUD TO GROUND LIGHTNING...AN ISOLATED SEVERE STORM
IS POSSIBLE...WITH DAMAGING WIND GUSTS BEING THE MAIN THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

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.

NCZ507-509-271745-
RUTHERFORD MOUNTAINS-POLK MOUNTAINS-
145 PM EDT SUN JUN 26 2011

...SEVERE THUNDERSTORM WATCH 556 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

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.

LANE

In the hours before

Special weather statement, Jun 26, 11:29 AM EDT, 5 hours 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1129 AM EDT SUN JUN 26 2011

NCZ033-049-050-053-503-505-261600-
AVERY-BUNCOMBE-BURKE MOUNTAINS-MCDOWELL MOUNTAINS-MITCHELL-YANCEY-
1129 AM EDT SUN JUN 26 2011

...STRONG THUNDERSTORMS WILL AFFECT AVERY...EASTERN MITCHELL...
NORTHEASTERN BUNCOMBE...NORTHWESTERN BURKE...NORTHWESTERN MCDOWELL
AND YANCEY COUNTIES THROUGH NOON EDT...

AT 1125 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 12 MILES NORTHEAST
OF HUNTER TO BULADEAN TO 5 MILES EAST OF MARSHALL...MOVING EAST AT 35
MPH.

THESE STORMS WILL AFFECT LOCATIONS NEAR...
  WEAVERVILLE...
  BURNSVILLE...
  BARNARDSVILLE...
  MICAVILLE...
  NEWLAND...
  SPRUCE PINE...

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3621 8190 3619 8184 3611 8180 3607 8173
      3593 8183 3565 8222 3570 8261 3580 8249
      3582 8241 3586 8242 3611 8211 3611 8208
      3613 8203 3628 8193 3629 8190

LANE

Local storm report, Jun 26, 4:27 PM EDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
427 PM EDT SUN JUN 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     TSTM WND DMG     7 WNW CARNESVILLE       34.40N 83.35W
06/26/2011                   FRANKLIN           GA   911 CALL CENTER

            TREE BLOWN DOWN PARTIALLY BLOCKING PROSPECT RD

&&

CSH

Special weather statement, Jun 26, 5:20 PM EDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
520 PM EDT SUN JUN 26 2011

SCZ004-010-262200-
ANDERSON-GREATER OCONEE-
520 PM EDT SUN JUN 26 2011

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN OCONEE AND WESTERN
ANDERSON COUNTIES THROUGH 600 PM EDT...

AT 516 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR FAIR PLAY...OR 13 MILES NORTHWEST OF
HARTWELL...MOVING EAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  SENECA...

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

LAT...LON 3449 8290 3447 8301 3450 8307 3453 8308
      3460 8317 3468 8307 3479 8289 3477 8288
      3474 8290 3473 8287 3467 8285 3464 8282
      3450 8275 3447 8288

CSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 10:17 AM EDT	Special Weather Statement	GSP	Graham, Haywood, Macon, Madison, Swain	43 min
Jun 26, 10:59 AM EDT	Special Weather Statement	GSP	Haywood, Jackson, Macon, Madison	46 min
Jun 26, 11:29 AM EDT	Special Weather Statement	GSP	Avery, Mitchell, Yancey	31 min
Jun 26, 6:41 PM EDT	Special Weather Statement	GSP	Rutherford	49 min
Jun 26, 6:50 PM EDT	Severe Thunderstorm Warning	GSP	Polk, Rutherford	55 min
Jun 26, 5:20 PM EDT	Special Weather Statement	GSP	Oconee	40 min
Jun 26, 6:00 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Pickens	45 min
Jun 26, 6:34 PM EDT	Special Weather Statement	GSP	Greenville	41 min
Jun 26, 3:38 PM EDT	Severe Thunderstorm Warning	GSP	Franklin, Hart	82 min
Jun 26, 4:38 PM EDT	Severe Thunderstorm Warning	GSP	Franklin, Habersham, Stephens	66 min
Jun 26, 7:51 PM EDT	Special Weather Statement	GSP	Franklin, Habersham, Rabun, Stephens	39 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2011 Every severe thunderstorm warning in 2011

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.