Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 554, NWS Greenville-Spartanburg, SC

September 1, 2012Gaston County, Lincoln County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 1, 2012, 4:08 PM EDT for Gaston County, Lincoln County, North Carolina. It was in force for 67 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: Sep 1, 2012, 4:08 PM EDT (20:08 UTC)
Expired: Sep 1, 2012, 5:15 PM EDT
In force: 67 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Gaston County, NC, Lincoln County, NC

The radar

The Greer radar (KGSP), 119 km from the middle of the area, began a volume at 20:11 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
Sep 1, 5:00 PM EDT	TSTM WND DMG	Iron Station, NC	MULTIPLE TREES DOWN NEAR IRON STATION.

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, 8.1 hours before the alert went out and 130 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: 1091 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: -30 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.

263 
WUUS52 KGSP 012008
SVRGSP
NCC071-109-012115-
/O.NEW.KGSP.SV.W.0554.120901T2008Z-120901T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
408 PM EDT SAT SEP 1 2012

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN GASTON COUNTY IN THE PIEDMONT OF NORTH CAROLINA...
  SOUTHEASTERN LINCOLN COUNTY IN THE PIEDMONT OF NORTH CAROLINA...

* UNTIL 515 PM EDT

* AT 404 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
  IRON STATION...OR 7 MILES SOUTHEAST OF LINCOLNTON.  THIS STORM WAS
  NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL IMPACT LOCATIONS NEAR...
  IRON STATION.
  DALLAS.
  STANLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BRIEF DAMAGING WINDS WILL BLOW DOWN TREES AND POWER LINES OVER SMALL
AREAS. A BRIEF PERIOD OF LARGE HAIL IS ALSO POSSIBLE. SEEK SHELTER
INSIDE AN INTERIOR ROOM.

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 3538 8097 3538 8098 3537 8098 3522 8102
      3533 8132 3550 8126 3548 8095
TIME...MOT...LOC 2008Z 284DEG 2KT 3539 8118

$$

RWH

2 follow-up statements

298 
WWUS52 KGSP 012023
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
423 PM EDT SAT SEP 1 2012

NCC071-109-012115-
/O.CON.KGSP.SV.W.0554.000000T0000Z-120901T2115Z/
GASTON NC-LINCOLN NC-
423 PM EDT SAT SEP 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
LINCOLN AND NORTHERN GASTON COUNTIES UNTIL 515 PM EDT...

AT 422 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
DALLAS...OR 7 MILES SOUTHEAST OF LINCOLNTON. MOVEMENT WAS NEARLY
STATIONARY.

THE SEVERE THUNDERSTORM WILL IMPACT LOCATIONS NEAR...
  IRON STATION.
  DALLAS.
  STANLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BRIEF DAMAGING WINDS WILL BLOW DOWN TREES AND POWER LINES OVER SMALL
AREAS. A BRIEF PERIOD OF LARGE HAIL IS ALSO POSSIBLE. SEEK SHELTER
INSIDE AN INTERIOR ROOM.

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 3538 8097 3538 8098 3537 8098 3522 8102
      3533 8132 3550 8126 3548 8095
TIME...MOT...LOC 2023Z 284DEG 2KT 3538 8119

$$

RWH

885 
WWUS52 KGSP 012111
SVSGSP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
511 PM EDT SAT SEP 1 2012

NCC071-109-012121-
/O.EXP.KGSP.SV.W.0554.000000T0000Z-120901T2115Z/
GASTON NC-LINCOLN NC-
511 PM EDT SAT SEP 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN AND
NORTHERN GASTON COUNTIES WILL EXPIRE AT 515 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LEVELS.  HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

LAT...LON 3538 8097 3538 8098 3537 8098 3522 8102
      3533 8132 3550 8126 3548 8095
TIME...MOT...LOC 2111Z 284DEG 2KT 3537 8116

$$

RWH

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 2:19 PM EDT	Areal Flood Advisory	GSP	Caldwell	101 min
Sep 1, 2:30 PM EDT	Areal Flood Advisory	GSP	Cabarrus	90 min
Sep 1, 3:23 PM EDT	Special Weather Statement	GSP	Mecklenburg	52 min
Sep 1, 3:24 PM EDT	Special Weather Statement	GSP	Alexander	51 min
Sep 1, 3:47 PM EDT	Flash Flood Warning	GSP	Mecklenburg	108 min
Sep 1, 3:51 PM EDT	Areal Flood Advisory	GSP	Cabarrus, Union	104 min
Sep 1, 4:21 PM EDT	Severe Thunderstorm Warning	GSP	Burke, Catawba, Lincoln	54 min
Sep 1, 5:01 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	88 min

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.