Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 3, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Feb 12, 2000, 4:24 AM EST for York County, South Carolina. It was in force for 31 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
- Feb 12, 2000, 4:24 AM EST (09:24 UTC)
- Expired
- Feb 12, 2000, 4:55 AM EST
- In force
- 31 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County York County, SC
The radar
The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 09:27 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 9.4 hours before the alert went out and 169 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1753 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
587 WUUS52 KGSP 120924 SVRGSP SCC091-120955- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 424 AM EST SAT FEB 12 2000 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN YORK COUNTY IN SOUTH CAROLINA * UNTIL 455 AM EST * AT 422 AM...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES NORTHWEST OF THE TOWN OF YORK...MOVING NORTHEAST AT 50 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SMYRNA AT 430 AM CLOVER AT 445 AM PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. N
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 Feb 12, 1:35 AM EST, 2 hours 49 minutes earlier.
Area forecast discussion, Feb 12, 1:35 AM EST, 2 hours 49 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 135 AM EST SAT FEB 12 2000 PRIMARY FORECAST CONCERN THIS PACKAGE IS POSSIBILITY OF STRONG CONVECTION TDA...AND TEMPS W/REMAINS OF WEDGE-RIDGE ON SUN. AN IMPRESSIVE AREA OF ELEVATED CONVECTION IS APPROACHING THE CWA FROM THE W/THIS MORNING. THIS TSRA IS IN THE NOSE OF A STRONG THETA E AXIS AND IN THE HEART OF STRONG WAA ON THE I294 SFC ON THE ETA. THE AREA OF UPGLIDE ONLY STRENGTHENS OVER THE WRN CWA AS WE APPROACH 12Z...HELPED BY STRONG AGEO MOTION WITH A COUPLED JET. THE MAIN VORT...INTERESTINGLY...WL LAG THE BEST WAA AND H3 DYNAMICS BY A GOOD SIX HOURS. WET BULB ZERO AT FFC AT 00Z WAS ABOUT 8500 FEET... SO WE REALLY DO NOT NEED THE CAA ALOFT THE VORT WOULD IMPART. BY 18Z...AS THE VORT CROSSES THE CWA...MOISTURE IS STILL RATHER DEEP WITH LOCAL POP SCHEME GIVING ABOUT A 70 POP FOR THE AFTERNOON. UPGLIDE ALSO STILL CONTINUES...THOUGH IS NOT AS STRONG AS WE LOSE THE AGEO COMPONENT INTRODUCED BY THE RETREATING COUPLED JET. THE QUESTION IS...HOW FAR S WL THE WEDGE RIDGE PUSH BY EARLY AFTN. 06Z SFC MAP SHOWS RISES OF 2 TO 3 MB OVER THE MID ATLANTIC STATES...NOT AS HIGH AS I/D LIKE TO SEE TO PUSH RIDGE THOUGH THE ENTIRE CWA. STILL...THE ETA HAS MOST NON MTN AREAS IN ELY FLOW BY AFTN...AS THE RUC DOES BY 15Z. THUS...THREAT FOR STUFF ROOTED IN THE BNDRY LAYER IN THE EARLY AFTN NOT TOO HIGH. WL KEEP MENTION OF TSRA IN ALL ZONES TDA. PCPN SHOULD TAPER OFF SOME IN THE AFTN...PARTICULARLY NRN CWA. NOT SURE HOW TO WORD THAT YET...BUT WL AT LEAST START W/CAT POPS EVERYWHERE. MAY MENTION SOME W/LARGE HAIL IN THE SRN TIER OF ZONES AND MTNS. WE WON/T SCOUR OVERNIGHT...SO WHATEVER WE FALL TO BY LATE AFTN SHOULD BE ABOUT IT FOR LOWS. WL FOLLOW THE ETA SFC WET-BULBS FOR THIS...WHICH ARE FAIRLY CLOSE TO RAFS. AS FOR P-TYPE PROBLEM. ETA 1000-850 THICKNESS NEVER FALL TO BELOW 1320 TDA...SO NOT CONCERNED ABOUT THAT. WHETHER WE WL SCOUR ON SUN IS A TOUGH CALL. THE PREVIOUS SHIFT DIDN/T THINK SO AND WENT WELL BELOW MOS NUMBERS. H8 FLOW BECOMES QUITE STRONG OUT OF THE SW BY AFTN...AND EVEN THE ETA LOSES THE WEDGE RIDGE...ALBEIT LATE. THEN THERE IS THE PROBLEM OF A FEW SHOWERS IN WAA AHEAD OF NEXT...STRONG SHORT WAVE. WL GO COOLER THAN MOS...BUT A COUPLE CATS WARMER THAN PREVIOUS SHIFT. LOOKS LIKE A STRONG MCS SUN NGHT AND EARLY MON. WL PUT MENTION OF TSRA IN FIRST AND SECOND PERIOD OF THE EXTENDED AS A RESULT. PCPN MAY BE MOSTLY OVER MON IF AVN TIMING IS RIGHT...BUT WON/T GET THAT SPECIFIC ATTM. PRELIMINARY NUMBERS: AVL 46/36/55 823 CLT 48/38/52 922 GSP 50/40/53 823 .GSP...NONE. MCAVOY
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 4:05 AM EST | Severe Thunderstorm Warning | GSP | Cherokee | 35 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2000Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.