Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 539, NWS Greenville-Spartanburg, SC

August 9, 20124 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 9, 2012, 6:46 PM EDT for 4 counties in North Carolina. It was in force for 44 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: Aug 9, 2012, 6:46 PM EDT (22:46 UTC)
Expired: Aug 9, 2012, 7:30 PM EDT
In force: 44 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Burke County, NC, Cleveland County, NC, McDowell County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 112 km from the middle of the area, began a volume at 22:47 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
Aug 9, 6:59 PM EDT	TSTM WND DMG	Morganton, NC	TREES AND POWER LINES DOWN ON SPAINHOUR RD AND ALONG 181.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.8 hours before the alert went out and 162 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: 1282 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 930 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 15 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.

697 
WUUS52 KGSP 092246
SVRGSP
NCC023-045-111-161-092345-
/O.NEW.KGSP.SV.W.0539.120809T2246Z-120809T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
646 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BURKE COUNTY IN WESTERN NORTH CAROLINA...
  NORTHWESTERN CLEVELAND COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  EASTERN MCDOWELL COUNTY IN WESTERN NORTH CAROLINA...
  NORTHEASTERN RUTHERFORD COUNTY IN WESTERN NORTH CAROLINA...

* UNTIL 745 PM EDT

* AT 643 PM EDT...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 DYSARTSVILLE TO 6 MILES WEST OF CASAR...AND MOVING NORTH AT 25
  MPH.

* SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  LAKE JAMES.
  MORGANTON.
  ICARD AND VALDESE.
  RUTHERFORD COLLEGE AND CONNELLY SPRINGS.
  LAKE RHODHISS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE CAPABLE OF BLOWING DOWN SCATTERED TREES AND POWER
LINES. SEEK SHELTER INSIDE AN INTERIOR ROOM.

THESE SEVERE THUNDERSTORMS ARE ALSO PRODUCING EXTREMELY HEAVY
RAINFALL. FLOODING OF DRAINAGE DITCHES AND LOW LYING AREAS MAY OCCUR.
DO NOT DRIVE THROUGH AREAS WHERE WATER IS FLOWING OVER THE ROAD.

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

&&

LAT...LON 3589 8172 3587 8171 3585 8165 3582 8162
      3583 8160 3581 8159 3578 8156 3578 8147
      3575 8139 3542 8167 3553 8207 3596 8189
TIME...MOT...LOC 2246Z 202DEG 22KT 3559 8192 3553 8171

$$

NED

3 follow-up statements

955 
WWUS52 KGSP 092304
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
704 PM EDT THU AUG 9 2012

NCC045-161-092314-
/O.CAN.KGSP.SV.W.0539.000000T0000Z-120809T2345Z/
CLEVELAND NC-RUTHERFORD NC-
704 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RUTHERFORD AND
NORTHWESTERN CLEVELAND COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THIS 
AREA.

LAT...LON 3589 8173 3582 8162 3582 8160 3578 8156
      3578 8147 3575 8139 3556 8155 3558 8171
      3561 8172 3561 8175 3559 8178 3562 8200
      3596 8189
TIME...MOT...LOC 2304Z 202DEG 22KT 3575 8186 3569 8165

$$

NCC023-111-092345-
/O.CON.KGSP.SV.W.0539.000000T0000Z-120809T2345Z/
MCDOWELL NC-BURKE NC-
704 PM EDT THU AUG 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BURKE AND
SOUTHEASTERN MCDOWELL COUNTIES UNTIL 745 PM EDT...

AT 659 PM EDT...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 LAKE JAMES TO 6 MILES SOUTH OF MORGANTON...MOVING NORTH AT 25
MPH.

SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  MORGANTON.
  VALDESE.
  ICARD...RUTHERFORD COLLEGE AND CONNELLY SPRINGS.
  LAKE RHODHISS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE CAPABLE OF BLOWING DOWN SCATTERED TREES AND POWER
LINES. SEEK SHELTER INSIDE AN INTERIOR ROOM.

THESE SEVERE THUNDERSTORMS ARE ALSO PRODUCING EXTREMELY HEAVY
RAINFALL. FLOODING OF DRAINAGE DITCHES AND LOW LYING AREAS MAY OCCUR.
DO NOT DRIVE THROUGH AREAS WHERE WATER IS FLOWING OVER THE ROAD.

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

&&

LAT...LON 3589 8173 3582 8162 3582 8160 3578 8156
      3578 8147 3575 8139 3556 8155 3558 8171
      3561 8172 3561 8175 3559 8178 3562 8200
      3596 8189
TIME...MOT...LOC 2304Z 202DEG 22KT 3575 8186 3569 8165

$$

NED

840 
WWUS52 KGSP 092315
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
715 PM EDT THU AUG 9 2012

NCC111-092326-
/O.CAN.KGSP.SV.W.0539.000000T0000Z-120809T2345Z/
MCDOWELL NC-
715 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MCDOWELL COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THIS 
AREA.

LAT...LON 3582 8160 3578 8156 3578 8147 3575 8139
      3556 8155 3558 8170 3561 8172 3561 8175
      3559 8178 3559 8183 3572 8187 3578 8195
      3596 8189
TIME...MOT...LOC 2316Z 202DEG 22KT 3582 8183 3576 8162

$$

NCC023-092345-
/O.CON.KGSP.SV.W.0539.000000T0000Z-120809T2345Z/
BURKE NC-
715 PM EDT THU AUG 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BURKE COUNTY
UNTIL 745 PM EDT...

AT 712 PM EDT...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 7 MILES NORTHEAST OF LAKE JAMES TO VALDESE...MOVING NORTH AT 25
MPH.

SEVERE THUNDERSTORMS WILL IMPACT LOCATIONS NEAR...
  LAKE RHODHISS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE CAPABLE OF BLOWING DOWN SCATTERED TREES AND POWER
LINES. SEEK SHELTER INSIDE AN INTERIOR ROOM.

THESE SEVERE THUNDERSTORMS ARE ALSO PRODUCING EXTREMELY HEAVY
RAINFALL. FLOODING OF DRAINAGE DITCHES AND LOW LYING AREAS MAY OCCUR.
DO NOT DRIVE THROUGH AREAS WHERE WATER IS FLOWING OVER THE ROAD.

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

&&

LAT...LON 3582 8160 3578 8156 3578 8147 3575 8139
      3556 8155 3558 8170 3561 8172 3561 8175
      3559 8178 3559 8183 3572 8187 3578 8195
      3596 8189
TIME...MOT...LOC 2316Z 202DEG 22KT 3582 8183 3576 8162

$$

NED

923 
WWUS52 KGSP 092330
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
730 PM EDT THU AUG 9 2012

NCC023-092340-
/O.CAN.KGSP.SV.W.0539.000000T0000Z-120809T2345Z/
BURKE NC-
730 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR BURKE COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS WEAKENED BELOW
SEVERE LEVELS.  HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE
WITH THESE THUNDERSTORMS.

LAT...LON 3582 8160 3578 8156 3578 8147 3575 8139
      3556 8155 3558 8170 3561 8172 3561 8175
      3559 8178 3559 8183 3572 8187 3578 8195
      3596 8189
TIME...MOT...LOC 2330Z 202DEG 22KT 3590 8179 3584 8158

$$

NED

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 8:41 PM EDT	Flash Flood Warning	GSP	Union	3 hr
Aug 9, 1:39 PM EDT	Special Weather Statement	GSP	Graham	51 min
Aug 9, 1:55 PM EDT	Special Weather Statement	GSP	Henderson	35 min
Aug 9, 2:17 PM EDT	Areal Flood Advisory	GSP	Madison	103 min
Aug 9, 2:49 PM EDT	Severe Thunderstorm Warning	GSP	Haywood, Jackson, Swain	56 min
Aug 9, 2:55 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Henderson	46 min
Aug 9, 3:16 PM EDT	Severe Thunderstorm Warning	GSP	Haywood	59 min
Aug 9, 4:38 PM EDT	Special Weather Statement	GSP	Henderson	37 min
Aug 9, 4:51 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Polk	69 min
Aug 9, 6:18 PM EDT	Special Weather Statement	GSP	Rutherford	42 min
Aug 9, 6:41 PM EDT	Special Weather Statement	GSP	Burke	34 min
Aug 9, 6:59 PM EDT	Areal Flood Advisory	GSP	Caldwell	2 hr
Aug 9, 7:26 PM EDT	Flash Flood Warning	GSP	Caldwell	2 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.