Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 129, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 23, 2001, 4:27 PM EDT for Greenville 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
- Sep 23, 2001, 4:27 PM EDT (20:27 UTC)
- Expired
- Sep 23, 2001, 5:15 PM EDT
- In force
- 48 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Greenville County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 23, 4:40 PM EDT | Thunderstorm Wind 60 E | Mauldin, SC | Mauldin Police Department reported numerous trees, and all city flags flying downtown, blown down. Dime-sized hail also fell. |
| Sep 23, 4:40 PM EDT | Hail 0.75 | Mauldin, 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 12:00Z, 8.5 hours before the alert went out and 259 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
- 60 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 1373 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
833 WUUS52 KGSP 232029 SVRGSP SCC045-232115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 427 PM EDT SUN SEP 23 2001 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL AND SOUTHERN GREENVILLE COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 515 PM EDT * AT 427 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS 8 MILES SOUTH OF GREENVILLE...OR ABOUT 4 MILES WEST OF SIMPSONVILLE...MOVING NORTH AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MAULDIN AT 435 PM EDT. EAST SIDE GREENVILLE AT 455 PM EDT. PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. $$ MCAVOY/JONES
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 Sep 23, 3:07 PM EDT, 1 hour 20 minutes earlier.
Area forecast discussion, Sep 23, 3:07 PM EDT, 1 hour 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 300 EDT SUN SEP 23 2001 SEVERAL DIFFERENT FORCING MECHANISMS WILL AFFECT THE WESTERN CAROLINAS AND NORTHEAST GEORGIA DURING THE NEXT TWO DAYS. A LOW LEVEL CONVERGENCE AXIS SETTING UP ACROSS THE PIEDMONT...WITH DEWPOINTS IN THE UPPER 60S TO AROUND 70...WILL KEEP SCATTERED CONVECTION GOING THROUGH THE EVENING HOURS. A VORT MAX EJECTING ENE FROM THE BASE OF THE LONGWAVE TROUGH TONIGHT WILL COMBINE WITH INCREASING UPPER DIVERGENCE IN THE JETLET ENTRANCE REGION ALOFT TO GENERATE ADDITIONAL OMEGA OVERNIGHT. ALL OF THIS COINCIDES WITH THE STEADILY DEEPENING MOISTURE SEEN ON TIME SECTIONS. WILL NEED LIKELY POPS FOR MAINLY AFTER MIDNIGHT WITH LOWEST CHC NW PIEDMONT. FRONTAL BAND WILL WORK SWIFTLY ACROSS THE REGION DURING THE DAY TOMORROW WITH A STRONG PUSH 18Z TO 00Z WITH THE MAIN VORT. LACK OF HEATING WILL LIMIT INSTABILITY SOMEWHAT...BUT HIGH SFC DEWPOINTS AND DYNAMICAL FORCING MAY KEEP STRONG CONVECTION GOING WITH THE FRONT. SHEAR PROFILES LOOK QUITE INTERESTING ON THE AVN...WHILE ETA WIND SPEEDS ARE SOMEWHAT LESS. DRYING ENSUES MON EVENING FOR ALL BUT NW FLOW UPSLOPE PREFERRED NC MTN AREAS WHERE LOW LEVEL MOISTURE POOL WRAPS BACK IN TO KEEP CHC OF SHOWERS GOING. 850 MB ZERO ISOTHERM FLIRTS WITH THE NRN MTNS...BUT MAIN COLD POOL STAYS NW OF REGION...AND IT IS CLIMATOLOGICALLY VERY EARLY FOR NW FLOW MOUNTAIN SNOWS. WILL ADVERTISE SOME UPPER 30S TEMPS HOWEVER TO GO WITH LINGERING RAIN SHOWERS IN THE NRN MTNS. ADDITIONAL VORTS SWING SOUTHWARD DOWN BACKSIDE OF MEAN TROUGH...BUT WITH LITTLE MOISTURE TO WORK WITH. WILL KEEP EXTENDED FORECAST DRY AND RELATIVELY COOL THROUGH SUNDAY. FCSTID = 33 GSP 68 75 55 66 / 70 80 10 0 AND 69 75 55 66 / 70 80 10 0 CLT 67 76 57 65 / 60 80 30 0 HKY 65 72 52 62 / 70 80 10 0 AVL 63 68 46 59 / 70 90 30 10 .GSP... GA...NONE. NC...NONE. SC...NONE. HG
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 5:55 PM EDT | Severe Thunderstorm Warning | GSP | Spartanburg | 35 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2001Every severe thunderstorm warning in 2001
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.