Alert archive / South Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 276, NWS Greenville-Spartanburg, SC

July 20, 1998Oconee County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 20, 1998, 9:17 PM EDT for Oconee County, Pickens County, South Carolina. It was in force for 48 min. 2 reports 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 20, 1998, 9:17 PM EDT (01:17 UTC)
Expired: Jul 20, 1998, 10:05 PM EDT
In force: 48 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

Counties Oconee County, SC, Pickens County, SC

What was reported inside it

Time	Report	Where	Remark
Jul 20, 9:40 PM EDT	Thunderstorm Wind 50	Pickens, SC
Jul 20, 9:50 PM EDT	Thunderstorm Wind 50	Newry, SC

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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.3 hours before the alert went out and 219 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: 1333 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 20, 2:35 PM EDT, 6 hours 42 minutes earlier.

Area forecast discussion, Jul 20, 2:35 PM EDT, 6 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE/SPARTANBURG, SC
235 PM EDT MON JUL 20 1998

AIRMASS MODERATELY UNSTABLE LATE THIS AFTERNOON AND EVENING WITH SOME
DPVA AND OMEGA UPLIFT SHOWING IN MODELS THIS TIME PERIOD. LEE SIDE
TROF EAST OF MTNS SHOULD CONTINUE TO PROVIDE SOME MOISTURE CONVG TO
INITIATE WIDELY SCTD TSTM DEVELOPMENT. ETA SHOWING SOME 20 TO 30 KT
WINDS H8 AND H7 FOR LATER TODAY EAST TN/WESTERN NC SO IF A FEW
STORMS POP...COULD GET AN ISOLATED SEVERE REPORT ANYWHERE IN CWA.
ANY STORMS SHOULD BE SLOW MOVING SO LUCKY FEW COULD GET SOME HEALTHY
RAINS.

A BIT WARMER TEMPS ALOFT UPSTREAM BUT WILL STILL HAVE A FEW WEAK
SHORT WAVES POISED IN UPPER RIDGE OVER AREA AND LEE SIDE TROFFING.
THIS SHOULD CONTINUE ONLY A MEAGER CHC FOR AFTN OR ERLY EVNG STORMS
THROUGH WEDNESDAY.

WEAK UPPER TROFFING SHOULD BUILD BACK INTO VCNTY LATER IN WEEK AS
WEAK COLD FRONT APRCHS FROM NORTH.

PERSISTANCE PRBLY BEST FORECST FOR MAX AND MIN TEMPS NEXT FEW DAYS
AND THIS GOES WELL WITH CURRENT GUIDANCE.

AVL 63/91/63/91 2/2/2/2
CLT 71/97/71/97 3/2/2/2
GSP 70/97/70/97 3/2/2/2

NEAL

In the hours before

Local storm report, Jul 20, 7:09 PM EDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
709 PM EDT MON JUL 20 1998

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

652 PM     5 SE PENDLETON            SC   WIND DAMAGE
07/20/98   ANDERSON                       TREES AND POWER LINES DOWN
                                          BETWEEN PENDLETON AND
                                          INTERSTATE 85. REPORT FROM
                                          COUNTY COMMS.

BWM

Local storm report, Jul 20, 7:09 PM EDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
709 PM EDT MON JUL 20 1998

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

652 PM     5 SE PENDLETON            SC   WIND DAMAGE
07/20/98   ANDERSON                       TREES AND POWER LINES DOWN
                                          BETWEEN PENDLETON AND
                                          INTERSTATE 85. REPORT FROM
                                          COUNTY COMMS.

BWM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:23 PM EDT	Severe Thunderstorm Warning	GSP	Gaston	47 min
Jul 20, 8:51 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Mecklenburg	49 min
Jul 20, 9:09 PM EDT	Flash Flood Warning	GSP	Cabarrus	3 hr
Jul 20, 9:30 PM EDT	Severe Thunderstorm Warning	GSP	Union	65 min
Jul 21, 3:18 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	47 min
Jul 21, 4:28 PM EDT	Severe Thunderstorm Warning	GSP	McDowell	32 min
Jul 21, 4:51 PM EDT	Severe Thunderstorm Warning	GSP	Burke	49 min
Jul 20, 8:51 PM EDT	Severe Thunderstorm Warning	GSP	York	49 min
Jul 20, 8:59 PM EDT	Severe Thunderstorm Warning	GSP	Greenville	51 min
Jul 20, 9:55 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	65 min
Jul 20, 10:07 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee	33 min
Jul 20, 10:15 PM EDT	Severe Thunderstorm Warning	GSP	York	65 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1998 Every severe thunderstorm warning in 1998

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.