Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 2, NWS Greenville-Spartanburg, SC

January 21, 20124 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jan 21, 2012, 7:44 AM EST for 4 counties in North Carolina. It was in force for 61 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: Jan 21, 2012, 7:44 AM EST (12:44 UTC)
Expired: Jan 21, 2012, 8:45 AM EST
In force: 61 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Graham County, NC, Haywood County, NC, Madison County, NC, Swain County, NC

The radar

The Knoxville radar (KMRX), 63 km from the middle of the area, began a volume at 12:46 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, 0.7 hours before the alert went out and 276 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: 238 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 505 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 265 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

235 
WUUS52 KGSP 211244
SVRGSP
NCC075-087-115-173-211345-
/O.NEW.KGSP.SV.W.0002.120121T1244Z-120121T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
744 AM EST SAT JAN 21 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRAHAM COUNTY IN WESTERN NORTH CAROLINA...
  NORTHERN HAYWOOD COUNTY IN WESTERN NORTH CAROLINA...
  MADISON COUNTY IN WESTERN NORTH CAROLINA...
  SWAIN COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 845 AM EST

* AT 742 AM 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 4 MILES EAST OF NEWPORT TO 12 MILES EAST OF   GATLINBURG TO 
  10 MILES SOUTHEAST OF MARYVILLE TO 22 MILES WEST OF     
  ROBBINSVILLE...MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WATERVILLE AND TAPOCO...
  NEWFOUND GAP AND FONTANA VILLAGE...
  HOT SPRINGS AND ALLENSTAND...
  WHITEROCK AND WALNUT...
  MARSHALL AND CANTO...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3541 8403 3553 8388 3557 8377 3557 8349
      3577 8315 3578 8299 3594 8291 3593 8281
      3603 8272 3595 8248 3583 8250 3573 8267
      3569 8286 3561 8285 3548 8305 3552 8324
      3546 8336 3533 8336 3524 8373 3524 8401
TIME...MOT...LOC 1244Z 291DEG 42KT 3597 8310 3575 8325
          3562 8385 3542 8415

$$

MCAVOY

2 follow-up statements

998 
WWUS52 KGSP 211320
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
820 AM EST SAT JAN 21 2012

NCC075-087-115-173-211345-
/O.CON.KGSP.SV.W.0002.000000T0000Z-120121T1345Z/
GRAHAM NC-HAYWOOD NC-MADISON NC-SWAIN NC-
820 AM EST SAT JAN 21 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM EST
FOR SWAIN...MADISON...NORTHERN HAYWOOD AND GRAHAM COUNTIES...

AT 820 AM 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 4 MILES SOUTH OF WHITEROCK TO COVE CREEK TO 8 MILES 
NORTHWEST OF BRYSON CITY TO 4 MILES WEST OF SANTEETLAH...OR ALONG A 
LINE EXTENDING FROM 7 MILES NORTH OF MARSHALL TO 10 MILES NORTH OF 
WAYNESVILLE TO 8 MILES NORTHWEST OF BRYSON CITY TO 9 MILES NORTHWEST 
OF ROBBINSVILLE...MOVING EAST AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FAUST...STECOAH...MARS HILL...MAGGIE VALLEY...LAKE JUNALUSKA...
ALMOND...LUADA...WESSER AND ALARKA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE IN THE PATH OF THIS STORM 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.

&&

LAT...LON 3541 8403 3553 8388 3557 8377 3557 8349
      3577 8315 3578 8299 3594 8291 3593 8281
      3603 8272 3595 8248 3583 8250 3573 8267
      3569 8286 3561 8285 3548 8305 3552 8324
      3546 8336 3533 8336 3524 8373 3524 8401
TIME...MOT...LOC 1320Z 291DEG 42KT 3588 8260 3560 8293
          3549 8346 3535 8387

$$

HG

210 
WWUS52 KGSP 211345
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
845 AM EST SAT JAN 21 2012

NCC075-087-115-173-211353-
/O.EXP.KGSP.SV.W.0002.000000T0000Z-120121T1345Z/
GRAHAM NC-HAYWOOD NC-MADISON NC-SWAIN NC-
845 AM EST SAT JAN 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR SWAIN...MADISON...NORTHERN
HAYWOOD AND GRAHAM COUNTIES WILL EXPIRE AT 845 AM EST...

AT 843 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO SHOW 
A LINE OF STRONG THUNDERSTORMS STRETCHING FROM ROBBINSVILLE TO 
BRYSON CITY TO COVE CREEK...MOVING EAST AT 40 MPH.  THESE 
THUNDERSTORMS HAVE WEAKENED BELOW SEVERE LIMITS...SO THE WARNING 
WILL EXPIRE ON SCHEDULE AT 845 AM. HOWEVER...WINDS MAY STILL GUST TO 
BETWEEN 30 AND 40 MPH AT TIMES. PEA SIZE HAIL AND HEAVY RAIN WILL 
ALSO ACCOMPANY THE LINE ACROSS THE MOUNTAINS.

LAT...LON 3541 8403 3553 8388 3557 8377 3557 8349
      3577 8315 3578 8299 3594 8291 3593 8281
      3603 8272 3595 8248 3583 8250 3573 8267
      3569 8286 3561 8285 3548 8305 3552 8324
      3546 8336 3533 8336 3524 8373 3524 8401
TIME...MOT...LOC 1343Z 291DEG 42KT 3563 8298 3563 8298
          3549 8331 3528 8392

$$

HG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 8:15 AM EST	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Madison, Yancey	40 min
Jan 21, 8:42 AM EST	Special Weather Statement	GSP	Jackson, Macon	48 min
Jan 21, 9:00 AM EST	Special Weather Statement	GSP	Burke, Caldwell, McDowell	45 min
Jan 21, 9:08 AM EST	Special Weather Statement	GSP	Buncombe, Haywood, Henderson, Jackson, Macon, Transylvania	37 min
Jan 21, 9:42 AM EST	Special Weather Statement	GSP	Henderson, Polk, Rutherford, Transylvania	63 min
Jan 21, 9:57 AM EST	Areal Flood Advisory	GSP	Madison	4 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012 Every severe thunderstorm warning 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.