Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 108, NWS Columbia, SC

July 11, 2000Barnwell County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Jul 11, 2000, 3:26 PM EDT for Barnwell County, South Carolina. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 11, 2000, 3:26 PM EDT (19:26 UTC)
Expired: Jul 11, 2000, 4:30 PM EDT
In force: 64 min
Issued by: NWS Columbia, SC
Area: Whole counties

County Barnwell County, SC

The radar

The Charleston,SC radar (KCLX), 77 km from the middle of the area, began a volume at 19:29 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
Jul 11, 3:26 PM EDT	Thunderstorm Wind 50 E	Williston, SC	HWY DEPT reported trees down on hwy 39.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.4 hours before the alert went out and 140 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 KCAE 111927
SVRCAE
SCC011-112030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
326 PM EDT TUE JUL 11 2000

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BARNWELL COUNTY IN CENTRAL SOUTH CAROLINA

* UNTIL 430 PM EDT.

* AT 316 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WILLISTON...OR ABOUT 16 MILES NORTH OF
  BARNWELL...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLACKVILLE AT 340 PM EDT

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS.

REPORT ANY HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY SHERIFF
OR TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN COLUMBIA.

JDB

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 Columbia, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 2:30 PM EDT, 56 minutes earlier.

Area forecast discussion, Jul 11, 2:30 PM EDT, 56 minutes before

SCZ015-016-018-020>022-025>031-035>038-041-GAZ040-063>065-077-120507-

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA, SC
230 PM EDT TUE JUL 11 2000

WEAK SURFACE TROUGH ACROSS THE AREA. CONSIDERABLE AC MOVING INTO
NORTH MIDLANDS...LIMITING FACTOR FOR CONVECTION AT THE MOMENT. CU
DEVELOPMENT IN THE CSRA WHERE SFC BASED LI AROUND -8. TSTMS
CURRENTLY IN THE MOUNTAINS NORTH CAROLINA AND N GA. WEAK MID LEVEL
SHORT WAVE MOVES ACROSS NORTH CAROLINA TONIGHT...META SUGGESTS BEST
LOW LEVEL MOISTURE CONVERGENCE THIS EVENING FROM THE CLT EAST ACROSS
PEE DEE...HOWEVER AT THE MOMENT BEST CHANCE APPEARS TO BE IN THE
CSRA WHERE BEST HEATING IS OCCURRING. K-INDEX NEAR 40 THIS EVENING
PRECIP WATER NEAR 2.00 INCHES. ANY TSTMS THAT DEVELOP WILL BE
CAPABLE OF HEAVY RAIN. PLAN ON CHANCE POPS...MAINLY EVENING TONIGHT.
SURFACE COLD FRONT...ACROSS NORTH CAROLINA WILL MOVE A LITTLE CLOSER
WED...BUT APPEARS TO BE STILL NORTH OF REGION IN THE AFTERNOON.
AIRMASS A LITTLE LESS UNSTABLE...K INDEX IN THE MIDDLE 30S...SFC
BASED LI AROUND -6. ANOTHER MID LEVEL SHORT WAVE MOVING THRU NORTH
MIDLANDS WED AFTERNOON IN NORTHWEST FLOW ALOFT. 500 MB TEMPS REMAIN
AROUND -6...NOT THAT COLD. HOWEVER...850MB WAA NOTED ESPECIALLY
NORTH OF CAE...WITH E-W 850MB TROUGH AND WEAK TO MODERATE LOW LEVEL
CONVERGENCE WILL GO WITH GOOD CHANCE POPS. MODELS INDICATE FRONT
MOVES INTO MIDLANDS WED NIGHT BECOMING DIFFUSE...DEWPOINTS REMAIN IN
THE 70S THRU PERIOD...ALTHOUGH LOW LEVEL FLOW BECOMING NORTHEAST ON
THU. META SHOWS STRONG UVV'S WED NIGHT...WEAK THU MORNING. ONLY
MARGINAL INSTABILITY THU...BUT DEEPER MOISTURE ESPECIALLY IN THE
MORNING. WILL FORECAST CHANCE POPS WED NIGHT/THU WITH MAINLY
SHOWERS...ISOLATED TSTMS. NGM MOS TEMPS APPEAR OK ALTHOUGH WITH
NORTHEAST FLOW THU AND CONSIDERABLE CLOUDS WILL GO BELOW GUIDANCE.

FCSTID = 19

CAE TB 75/94/75/88 555
AGS TB 73/96/73/89 555

.CAE...
GA...NONE.
SC...NONE.

AWP

In the hours before

Special weather statement, Jul 11, 10:40 AM EDT, 4 hours 46 minutes before

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-111630-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA, SC
1040 AM EDT TUE JUL 11 2000

...SCATTERED THUNDERSTORMS THIS AFTERNOON AND THIS EVENING...

VERY WARM...MOIST AND UNSTABLE AIR ACROSS THE REGION COUPLED
WITH AFTERNOON HEATING AND A TROUGH OF LOW PRESSURE WILL AID
THE DEVELOPMENT OF SCATTERED THUNDERSTORMS THIS AFTERNOON.

THESE SCATTERED THUNDERSTORMS WILL FORM AFTER 2 PM AND BE
CAPABLE OF PRODUCING WIND GUSTS TO NEAR 50 MPH...SMALL HAIL...
HEAVY DOWNPOURS AND FREQUENT LIGHTNING.

CURRENT DATA FAVORS DOWNBURST DAMAGE FROM SEVERE THUNDERSTORM
DEVELOPMENT. THEREFORE...EMERGENCY MANAGEMEN$T AND SPOTTER ACTIVATION
MAY BE REQUIRED.

SJN

Local storm report, Jul 11, 2:55 PM EDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
255 PM EDT TUE JUL 11 2000

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

240 PM     MAYSON                    SC   WIND DAMAGE
07/11/00   SALUDA                         PHONE AND POWERLINES
                                          DOWN. REPORTED BY SHERIFF
                                          DEPT.

250 PM     AIKEN                     SC   WIND DAMAGE
07/11/00   AIKEN                          POWER LINE AND TREES
                                          DOWN. REPORTED BY SKYWARN
                                          OPERATOR.

SJN

Local storm report, Jul 11, 3:15 PM EDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA, SC
315 PM EDT TUE JUL 11 2000

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

210 PM     LEWISTON AREA.            GA   WIND DAMAGE
07/11/00   COLUMBIA                       TREES AND POWER LINES
                                          DOWN. REPORTED BY COUNTY
                                          EMA.

SJN

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 11, 2:32 PM EDT	Severe Thunderstorm Warning	CAE	Saluda	43 min
Jul 11, 2:38 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	37 min
Jul 11, 3:18 PM EDT	Severe Thunderstorm Warning	CAE	Aiken	57 min
Jul 11, 3:35 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield	55 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.