Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Greenville-Spartanburg, SC

February 28, 2011Jackson County, Macon County, Transylvania County, North Carolina; Oconee County, Pickens County, South Carolina; Habersham County, Rabun County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Feb 28, 2011, 3:57 PM EST for Jackson County, Macon County, Transylvania County, North Carolina; Oconee County, Pickens County, South Carolina; Habersham County, Rabun County, Stephens County, Georgia. It was in force for 63 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 28, 2011, 3:57 PM EST (20:57 UTC)
Expired: Feb 28, 2011, 5:00 PM EST
In force: 63 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Habersham County, GA, Rabun County, GA, Stephens County, GA, Jackson County, NC, Macon County, NC, Transylvania County, NC, Oconee County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 102 km from the middle of the area, began a volume at 20:59 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.

What was reported inside it

Time	Report	Where	Remark
Feb 28, 4:15 PM EST	TSTM WND DMG	5 E Mountain City, GA	SEVERAL TREES DOWN FROM SKY VALLEY SOUTHWARD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 28, 1:29 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.0 hours before the alert went out and 193 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 350 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.

570 
WUUS52 KGSP 282057
SVRGSP
GAC137-241-257-NCC099-113-175-SCC073-077-282200-
/O.NEW.KGSP.SV.W.0004.110228T2057Z-110228T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
357 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN STEPHENS COUNTY IN NORTHEAST GEORGIA...
  HABERSHAM COUNTY IN NORTHEAST GEORGIA...
  RABUN COUNTY IN NORTHEAST GEORGIA...
  SOUTHERN MACON COUNTY IN WESTERN NORTH CAROLINA...
  SOUTHWESTERN TRANSYLVANIA COUNTY IN WESTERN NORTH CAROLINA...
  SOUTH CENTRAL JACKSON COUNTY IN WESTERN NORTH CAROLINA...
  WESTERN PICKENS COUNTY IN UPSTATE SOUTH CAROLINA...
  OCONEE COUNTY IN UPSTATE SOUTH CAROLINA...

* UNTIL 500 PM EST

* AT 355 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 10 MILES NORTH OF MOCCASIN CREEK STATE PARK TO 6 MILES NORTH
  OF MOCCASIN CREEK STATE PARK TO 20 MILES WEST OF BATESVILLE...OR
  ALONG A LINE EXTENDING FROM 11 MILES EAST OF HIAWASSEE TO 8 MILES
  EAST OF HIAWASSEE TO 7 MILES SOUTH OF BLAIRSVILLE...MOVING EAST AT
  45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOCCASIN CREEK STATE PARK...
  DILLARD AND SKY VALLEY...
  HIGHLANDS AND NACOOHE LAKE...
  PINE MOUNTAIN AND CASHIERS...
  TURNERVILLE AND TALLULAH FALLS...
  SALEM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE
OR NO ADVANCE WARNING. SEEK SHELTER IN AN INTERIOR ROOM ON THE LOWEST
LEVEL OF A HOUSE OR OTHER STURDY STRUCTURE IF A TORNADO IS SPOTTED.

PEOPLE IN THE PATH OF THIS LINE OF SEVERE THUNDERSTORMS SHOULD BE
ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND
LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. SEEK SHELTER
INDOORS AWAY FROM WINDOWS AND DOORS UNTIL THE STORM PASSES.

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING...THROUGH OUR
AUTOMATED REPORTING SYSTEM...CALL OUR TOLL FREE NUMBER...
1 8 7 7...6 3 3...6 7 7 2.

&&

LAT...LON 3480 8368 3481 8366 3487 8367 3495 8356
      3499 8356 3500 8352 3513 8357 3513 8321
      3509 8287 3490 8266 3468 8277 3450 8296
      3451 8308 3454 8311 3452 8313 3458 8364
      3476 8363
TIME...MOT...LOC 2056Z 283DEG 61KT 3498 8355 3492 8360
          3477 8394

$$

BSH

2 follow-up statements

351 
WWUS52 KGSP 282139
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
439 PM EST MON FEB 28 2011

NCC099-113-282150-
/O.CAN.KGSP.SV.W.0004.000000T0000Z-110228T2200Z/
MACON NC-JACKSON NC-
439 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JACKSON AND
SOUTHERN MACON COUNTIES IS CANCELLED...

LAT...LON 3485 8360 3492 8315 3501 8307 3502 8301
      3505 8305 3511 8301 3509 8287 3490 8266
      3468 8277 3450 8296 3451 8307 3454 8311
      3452 8313 3458 8364 3476 8363 3480 8368
TIME...MOT...LOC 2140Z 283DEG 61KT 3486 8298 3476 8317
          3466 8352

$$

GAC137-241-257-NCC175-SCC073-077-282200-
/O.CON.KGSP.SV.W.0004.000000T0000Z-110228T2200Z/
STEPHENS GA-HABERSHAM GA-RABUN GA-TRANSYLVANIA NC-PICKENS SC-
OCONEE SC-
439 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EST
FOR OCONEE...WESTERN PICKENS...SOUTHWESTERN TRANSYLVANIA...SOUTHERN
RABUN...HABERSHAM AND NORTHERN STEPHENS COUNTIES...

AT 437 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SALEM TO LONG CREEK TO BATESVILLE...OR ALONG A LINE
EXTENDING FROM 7 MILES NORTH OF WALHALLA TO 9 MILES WEST OF WALHALLA
TO CLARKESVILLE...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAKE
KEOWEE...HOLLYWOOD...NINE TIMES...SIX MILE...TOCCOA...PICKENS...
WESTMINSTER...SENECA...NORRIS...CENTRAL...CLEMSON...LAKE HARTWELL...
TOWNVILLE...OAKWAY AND FAIR PLAY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE
OR NO ADVANCE WARNING. SEEK SHELTER IN AN INTERIOR ROOM ON THE LOWEST
LEVEL OF A HOUSE OR OTHER STURDY STRUCTURE IF A TORNADO IS SPOTTED.

&&

LAT...LON 3485 8360 3492 8315 3501 8307 3502 8301
      3505 8305 3511 8301 3509 8287 3490 8266
      3468 8277 3450 8296 3451 8307 3454 8311
      3452 8313 3458 8364 3476 8363 3480 8368
TIME...MOT...LOC 2140Z 283DEG 61KT 3486 8298 3476 8317
          3466 8352

$$

BSH

390 
WWUS52 KGSP 282202
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
502 PM EST MON FEB 28 2011

GAC137-241-257-NCC175-SCC073-077-282212-
/O.EXP.KGSP.SV.W.0004.000000T0000Z-110228T2200Z/
STEPHENS GA-HABERSHAM GA-RABUN GA-TRANSYLVANIA NC-PICKENS SC-
OCONEE SC-
502 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR OCONEE...WESTERN PICKENS...
SOUTHWESTERN TRANSYLVANIA...SOUTHERN RABUN...HABERSHAM AND NORTHERN
STEPHENS COUNTIES HAS EXPIRED...

LAT...LON 3485 8360 3492 8315 3501 8307 3502 8301
      3505 8305 3511 8301 3509 8287 3490 8266
      3468 8277 3450 8296 3451 8307 3454 8311
      3452 8313 3458 8364 3476 8363 3480 8368
TIME...MOT...LOC 2139Z 283DEG 61KT 3484 8300 3475 8319
          3465 8355

$$

BSH

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 8:21 PM EST	Lake Wind Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	23 hr
Feb 28, 3:46 AM EST	Wind Advisory	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more	14 hr
Feb 28, 1:25 PM EST	Special Weather Statement	GSP	Avery	35 min
Feb 28, 2:30 PM EST	Severe Thunderstorm Warning	GSP	Madison, Mitchell, Yancey	45 min
Feb 28, 3:14 PM EST	Severe Thunderstorm Warning	GSP	Graham, Swain	61 min
Feb 28, 3:50 PM EST	Special Weather Statement	GSP	Burke, McDowell	25 min
Feb 28, 4:09 PM EST	Severe Thunderstorm Warning	GSP	Alexander, Burke, Caldwell, Catawba, Cleveland, Lincoln and 2 more	66 min
Feb 28, 4:38 PM EST	Severe Thunderstorm Warning	GSP	Henderson, Polk, Rutherford, Transylvania	67 min
Feb 28, 4:39 PM EST	Severe Thunderstorm Warning	GSP	Alexander, Catawba, Iredell	38 min
Feb 28, 4:59 PM EST	Tornado Warning	GSP	Iredell, Rowan	17 min
Feb 28, 5:08 PM EST	Severe Thunderstorm Warning	GSP	Davie, Iredell, Rowan	32 min
Feb 28, 5:45 PM EST	Special Weather Statement	GSP	Cabarrus, Mecklenburg, Union	45 min
Feb 28, 6:06 PM EST	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg, Union	54 min
Feb 28, 4:59 PM EST	Tornado Warning	GSP	Greenville, Spartanburg	31 min
Feb 28, 5:21 PM EST	Special Weather Statement	GSP	Anderson	39 min
Feb 28, 5:30 PM EST	Severe Thunderstorm Warning	GSP	Anderson, Cherokee, Chester, Greenville, Laurens, Spartanburg and 2 more	60 min
Feb 28, 5:50 PM EST	Severe Thunderstorm Warning	GSP	Abbeville, Anderson, Greenwood, Laurens	55 min
Feb 28, 6:25 PM EST	Tornado Warning	GSP	Abbeville, Greenwood, Laurens	35 min
Feb 28, 6:42 PM EST	Special Weather Statement	GSP	Chester	48 min
Feb 28, 6:51 PM EST	Severe Thunderstorm Warning	GSP	Abbeville, Greenwood, Laurens	39 min
Feb 28, 6:57 PM EST	Tornado Warning	GSP	Greenwood, Laurens	14 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011 Severe Thunderstorm Warnings in Georgia, 2011 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.