Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 41, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 13, 1999, 2:51 PM EDT for Spartanburg County, South Carolina. It was in force for 64 min. 3 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
- May 13, 1999, 2:51 PM EDT (18:51 UTC)
- Expired
- May 13, 1999, 3:55 PM EDT
- In force
- 64 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Spartanburg County, SC
The radar
The Greer radar (KGSP), 22 km from the middle of the area, began a volume at 18:53 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 |
|---|---|---|---|
| May 13, 2:55 PM EDT | Hail 1 | Lyman, SC | |
| May 13, 3:04 PM EDT | Hail 1.5 | Duncan, SC | |
| May 13, 3:20 PM EDT | Thunderstorm Wind 50 | Spartanburg, 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.9 hours before the alert went out and 228 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.
- 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
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, 21 minutes earlier.
Area forecast discussion, May 13, 2:30 PM EDT, 21 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
Special weather statement, May 13, 10:42 AM EDT, 4 hours 9 minutes before
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</html>Special weather statement, May 13, 10:42 AM EDT, 4 hours 9 minutes before
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</html>Special weather statement, May 13, 10:42 AM EDT, 4 hours 9 minutes before
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</html>Local storm report, May 13, 2:30 PM EDT, 21 minutes before
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</html>Local storm report, May 13, 2:30 PM EDT, 21 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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</html>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, 6:24 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg | 36 min |
| May 13, 7:59 PM EDT | Severe Thunderstorm Warning | GSP | Avery | 36 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 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.