Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 47, NWS Greenville-Spartanburg, SC

May 13, 1999Mecklenburg County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 13, 1999, 6:24 PM EDT for Mecklenburg County, North Carolina. It was in force for 36 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: May 13, 1999, 6:24 PM EDT (22:24 UTC)
Expired: May 13, 1999, 7:00 PM EDT
In force: 36 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Mecklenburg County, NC

The radar

The Greer radar (KGSP), 133 km from the middle of the area, began a volume at 22:28 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 13, 3:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.4 hours before the alert went out and 125 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: 4 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -28 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 May 13, 2:30 PM EDT, 3 hours 54 minutes earlier.

Area forecast discussion, May 13, 2:30 PM EDT, 3 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
230 PM EDT THU MAY 13 1999

VORT MAX SEEN SPINNING INTO CENTRAL TN ON WATER VAPOR IMAGERY IS
PROGGED TO SLOWLY CHURN ACROSS THE WRN CAROLINAS TONIGHT AND INTO EARLY
FRIDAY. LOBES OF DPVA COMBINED WITH INSTABILITY AND LOW WBZ HEIGHTS
TONIGHT WILL CONTINUE THE THREAT FOR LARGE HAIL WHILE MODERATE DRY
PUNCH AT MID LEVELS COULD ALLOW FOR NEAR SEVERE WIND GUSTS. COUPLED
DIVERGENCE WITH THE UPPER JETS STAYS MAINLY ALONG NC/VA BORDER...
PROVIDING SUPPORT FARTHER N THAN MAIN INSTABILITY OVERNIGHT.

WILL MENTION MAINLY RAIN FRI BUT WITH TSTM PSBL OVER SRN PORTIONS
WITH UPPER COLD POOL PASSAGE AND CONVERGENCE WITH LOW. DEEP MOIST NE
FLOW DEVELOPS IN WAKE OF LOW WITH LOW LEVEL THCK FALLS TOMORROW.
EASTERLY COMPONENT COULD YIELD UPSLOPE FLOW AND LIGHT RAIN FOR FRI
NIGHT WHILE WEAK ISENTROPIC LIFT MAY AFFECT EASTERN PIEDMONT SECTION
THROUGH EARLY SAT.

TEMPS AND POPS WILL BE MUCH MORE IN LINE WITH COOLER WETTER FAN GIVEN
STRENGTH OF UPPER LOW AND COOL ADVECTION BEHIND SYSTEM. ONLY DEVIATION
WILL BE WARMER OVERNIGHT MINS TONIGHT GIVEN CURRENT DEWPOINTS AND
UPSTREAM PRECIP.

WRKGSP TO CAE AROUND 315 PM.

AVL 56/67/52/68 6642
CLT 61/70/52/67 6753
GSP 60/70/53/68 6642

.GSP...NONE.

HG

In the hours before

Local storm report, May 13, 4:02 PM EDT, 2 hours 22 minutes before

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Local storm report, May 13, 4:02 PM EDT, 2 hours 22 minutes before

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Local storm report, May 13, 5:49 PM EDT, 35 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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Local storm report, May 13, 5:49 PM EDT, 35 minutes before

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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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Local storm report, May 13, 6:15 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
615 PM EDT THU MAY 13 1999

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

545 PM     DANA                      NC   .88 INCH HAIL
05/13/99   HENDERSON                      NICKEL SIZE HAIL ON
                                          JACKSON LOOP ROAD. REPORT
                                          FROM AMATEUR RADIO.

BWM

Local storm report, May 13, 6:15 PM EDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
615 PM EDT THU MAY 13 1999

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

545 PM     DANA                      NC   .88 INCH HAIL
05/13/99   HENDERSON                      NICKEL SIZE HAIL ON
                                          JACKSON LOOP ROAD. REPORT
                                          FROM AMATEUR RADIO.

BWM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 5:12 PM EDT	Severe Thunderstorm Warning	GSP	Polk	63 min
May 13, 5:27 PM EDT	Severe Thunderstorm Warning	GSP	Henderson	33 min
May 13, 5:52 PM EDT	Severe Thunderstorm Warning	GSP	Union	63 min
May 13, 7:59 PM EDT	Severe Thunderstorm Warning	GSP	Avery	36 min
May 13, 2:51 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	64 min
May 13, 3:37 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, Union	63 min
May 13, 7:27 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	33 min
May 13, 5:40 PM EDT	Severe Thunderstorm Warning	GSP	Elbert	65 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1999 Every 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.