Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 115, NWS Greenville-Spartanburg, SC

July 11, 2000Laurens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 11, 2000, 4:47 PM EDT for Laurens County, South Carolina. It was in force for 43 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: Jul 11, 2000, 4:47 PM EDT (20:47 UTC)
Expired: Jul 11, 2000, 5:30 PM EDT
In force: 43 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Laurens County, SC

The radar

The Greer radar (KGSP), 49 km from the middle of the area, began a volume at 20:50 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

Charleston AFB, SC (KCHS), launched 12:00Z, 8.8 hours before the alert went out and 256 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: 517 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1046 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 55 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.

000 
WUUS52 KGSP 112048
SVRGSP
SCC059-112130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
447 PM EDT TUE JUL 11 2000

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LAURENS COUNTY IN UPSTATE SOUTH CAROLINA

* UNTIL 530 PM EDT

* AT 447 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM WITH DAMAGING WINDS 10 MILES SOUTHWEST OF LAURENS...OR
  ABOUT 3 MILES NORTHWEST OF WATERLOO...MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WATERLOO AT 455 PM EDT
  CROSS HILL AT 515 PM EDT

PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR
LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY
RAIN CAN OCCUR WITH ANY THUNDERSTORM.

$$
MOYER/JONES

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 Jul 11, 1:55 PM EDT, 2 hours 52 minutes earlier.

Area forecast discussion, Jul 11, 1:55 PM EDT, 2 hours 52 minutes before

SCZ001>014-019-NCZ033>037-048>059-062>072-082-GAZ010-017-018-026-028-
029-120033-

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
155 PM EDT TUE JUL 11 2000

STORMS DEVELOPING ALONG DIFFERENTIAL HEATING BOUNDARY THROUGH
WESTERN ZONES.  MOISTURE POOLING AND HEATING INTO THE MID/UPR 90S
HAVE CREATED A BAND OF HIGH CAPE VALUES OVER 2500J.  REST OF FA HAS
REMAINED MOSTLY CLOUDY AND HEATING HAS BEEN LIMITED.  LAPS SOUNDINGS
SHOWING MID/UPR LEVELS DRYING WHICH MAY BE A BIT SUSPECT SINCE
CLOUDS REMAIN OVER MUCH OF THE AREA.  NONETHELESS...CONVECTION
COMING OFF MOUNTAINS HAS NOT SURVIVED THE TRIP INTO THE PIEDMONT
REGION.  WHILE WE CANNOT RULE OUT ISOLATED TRW THIS EVENING...
BELIEVE THAT MOST ACTIVITY OVER ALL BUT WESTERN ZONES WILL DISSIPATE
WITH LOSS OF HEATING.  FRONT STILL LOOKS POISED TO DROP INTO NC LATE
TONIGHT THEN SLIDE SLOWLY SW INTO FA BY WED AFTERNOON.  THIS PUSH
COULD BE STRONGER DEPENDING OF DEVELOPMENT OF OH VALLEY MCS...AS HAS
BEEN THE CASE THE LAST 2 NIGHTS.  THIS ADDED PUSH WILL BRING FRONT
TO BISECT AREA WED NIGHT AND THURSDAY...PUTTING BEST CONVERGENCE
BOUNDARY IN LAST COUPLE OF DAYS IN THE AREA.  FLOW REMAINS WEAKLY
SHEARED AND MID LEVEL LAPSE RATES NEVER REALLY BECOME IMPRESSIVE.
HOWEVER...HIGH BOUNDARY LAYER MOISTER AND LOW LEVEL FORCING WILL
DOMINATE...EVEN WITH MINOR IMPULSES PASSING THROUGH IN NWLY FLOW
ALOFT.  SLIGHTLY BETTER ORGANIZED CONVECTION ALONG THE CONVERGENCE
ZONE COULD PRODUCE SOME MARGINAL SEVERE WEATHER FROM WINDS AND
HAIL.  WILL GO WITH HIGH CHANCE POPS WED THRU THUR ACROSS MOST OF
FA.  TEMPERATURES SHOULD CHANGE LITTLE WED BUT WITH FROPA WED
NIGHT...COULD SEE A DROP OF 2 TO 5 DEGREES BY THURS.      DELGADO

....PRELIMINARY NUMBERS....
FCSTID = 11
GSP   72  93  70  88 /  40  50  50  40
AND   73  93  71  89 /  20  50  50  40
CLT   70  92  69  88 /  40  50  50  40
HKY   72  90  68  87 /  40  50  50  40
AVL   64  84  64  83 /  40  50  50  40

.GSP...
GA...NONE.
NC...NONE.
SC...NONE.

In the hours before

Local storm report, Jul 11, 12:37 PM EDT, 4 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
1237 PM EDT TUE JUL 11 2000

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY L6OCATION....

1235 PM    GREER                     SC   THIS IS A TEST
07/11/00   SPARTANBURG                    THIS IS A TEST

RBN

Nearby

Severe Thunderstorm Warnings in South Carolina, 2000 Every severe thunderstorm warning in 2000

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.