Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 10, NWS Greenville-Spartanburg, SC

April 8, 1999Anderson County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 8, 1999, 5:55 PM EDT for Anderson County, South Carolina. It was in force for 50 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
Apr 8, 1999, 5:55 PM EDT (21:55 UTC)
Expired
Apr 8, 1999, 6:45 PM EDT
In force
50 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Whole counties

County Anderson County, SC

The radar

The Greer radar (KGSP), 56 km from the middle of the area, began a volume at 21:55 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 214 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 1999-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 794 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 1999-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
794 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

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 Apr 8, 1:35 PM EDT, 4 hours 20 minutes earlier.

Area forecast discussion, Apr 8, 1:35 PM EDT, 4 hours 20 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
135 PM EDT THU APR 8 1999

UPPER IMPULSE TO CROSS REGION OVERNIGHT WITH DEEP MOISTURE IN
PLACE. DRYING NOTED IN MID AND UPPER LEVELS FRI AND ALTHOUGH UPPER
DYNAMICS LACKING FRI AND FRI NIGHT...SPEED/DIRECTIONAL SHEAR
PERSIST AND INSTABILITY INCREASES WHILE NOSE OF SUPTROPICAL JET
MAX MOVES OVER AREA. MOISTURE AXIS APPROACHES SAVANNAH VALLEY
FROM THE SW LATE FRI NIGHT WITH ARRIVAL OF MID LEVEL LIFT. BACK
DOOR FRONT TO DROP INTO NC LATE FRI NIGHT STALLING NEAR I-40 SAT.
TEMPERATURES NEAR PERSISTANCE WITH WARM SECTOR IN PLACE. CLOUD
COVER SAT TO MODERATE MAXIMUMS. MOISTURE TO HOLD MINIMUMS UP.

AVL   56/80/53/76   5445
CLT   58/84/56/83   5334
GSP   59/85/57/82   5334

.GSP...NONE

JAT

In the hours before

Local storm report, Apr 8, 4:49 PM EDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
449 PM EDT THU APR 08 1999

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

430 PM     LAVONIA                   GA   60 MPH TSTM GUST
04/08/99   FRANKLIN                       LAVONIA FIRE CHIEF REPORTS
                                          WIND GUST OF 60 MPH WITH
                                          MARBLE SIZED HAIL.

445 PM     5 SE HARTWELL             GA   1.75 INCH HAIL
04/08/99   HART                           GOLF BALL SIZE HAIL 4 TO 5
                                          MILES FROM ANDERSON COUNTY
                                          LINE.

HG
Local storm report, Apr 8, 4:49 PM EDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
449 PM EDT THU APR 08 1999

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

430 PM     LAVONIA                   GA   60 MPH TSTM GUST
04/08/99   FRANKLIN                       LAVONIA FIRE CHIEF REPORTS
                                          WIND GUST OF 60 MPH WITH
                                          MARBLE SIZED HAIL.

445 PM     5 SE HARTWELL             GA   1.75 INCH HAIL
04/08/99   HART                           GOLF BALL SIZE HAIL 4 TO 5
                                          MILES FROM ANDERSON COUNTY
                                          LINE.

HG
Local storm report, Apr 8, 5:19 PM EDT, 36 minutes before
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Local storm report, Apr 8, 5:19 PM EDT, 36 minutes before
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Local storm report, Apr 8, 5:38 PM EDT, 17 minutes before
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Local storm report, Apr 8, 5:38 PM EDT, 17 minutes before
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<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 4:14 PM EDTSevere Thunderstorm WarningGSPOconee46 min
Apr 8, 4:41 PM EDTSevere Thunderstorm WarningGSPAnderson49 min
Apr 8, 5:07 PM EDTSevere Thunderstorm WarningGSPAbbeville48 min
Apr 8, 5:13 PM EDTTornado WarningGSPAbbeville47 min
Apr 8, 7:05 PM EDTSevere Thunderstorm WarningGSPGreenwood50 min
Apr 8, 4:54 PM EDTSevere Thunderstorm WarningGSPElbert51 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1999Every severe thunderstorm warning in 1999

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.