Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 122, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 31, 2001, 4:29 PM EDT for Oconee County, Pickens County, South Carolina. It was in force for 61 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
- Aug 31, 2001, 4:29 PM EDT (20:29 UTC)
- Expired
- Aug 31, 2001, 5:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
Counties Oconee County, SC, Pickens County, SC
The radar
The Greer radar (KGSP), 62 km from the middle of the area, began a volume at 20:30 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 |
|---|---|---|---|
| Aug 31, 4:30 PM EDT | Thunderstorm Wind 50 E | Clemson, SC | Trees and power lines blown over from western Pickens County, to just east of the city of Pickens. 3000 homes were without power after the storm. |
| Aug 31, 4:53 PM EDT | Thunderstorm Wind 50 E | Dacusville, SC | Numerous trees and power lines blown down, taking out power for hours across all of Dacusville and parts of Easley. |
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 219 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
- 873 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
667 WUUS52 KGSP 312031 SVRGSP SCC073-077-312130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 429 PM EDT FRI AUG 31 2001 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PICKENS COUNTY IN SOUTH CAROLINA SOUTHEASTERN OCONEE COUNTY IN SOUTH CAROLINA * UNTIL 530 PM EDT * AT 429 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES EAST OF SENECA...OR ABOUT OVER UTICA...MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CLEMSON AT 435 PM EDT CENTRAL AT 440 PM EDT SIX MILE AT 445 PM EDT LIBERTY AT 455 PM EDT PICKENS AT 505 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. $$ MOORE
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 Aug 31, 3:45 PM EDT, 44 minutes earlier.
Area forecast discussion, Aug 31, 3:45 PM EDT, 44 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 345 PM EDT FRI AUG 31 2001 VORT MAX IN WSW FLOW PRESENTLY PUSHING CONVECTION ACROSS THE AREA...WITH UPSTREAM STRONGER SHORTWAVE OVER ARKLATEX SCHEDULED TO ARRIVE LATER TONIGHT COINCIDENT WITH INCREASING SUPPORT FROM THE UPPER JET ENTRANCE REGION. TIME SECTIONS ARE SATURATED THROUGH THE COLUMN...SO PRECIP SHOULD BE WIDESPREAD OVER MOUNTAINS WITH DECENT COVERAGE EXTENDING INTO PIEDMONT. MODELS STILL LACK AGREEMENT ON FRONTAL TIMING...BUT TREND IS TOWARD SYSTEM STALLING ACROSS THE CAROLINAS BY SATURDAY NIGHT. DEEPENING CUTOFF LOW OVER THE MS VALLEY BY SUN NIGHT SHOULD SEND RETURN FLOW WITH MOISTURE BACK OVER THE BOUNDARY. SPECTRAL RUNS FROM LAST NIGHT APPEARED TO HAVE THE BOUNDARY TOO FAR S BY SUNDAY WITH TOO MUCH DEEP LAYER DRYING OVER THE CAROLINAS. LATEST RUNS ALONG WITH EXTENDED ENSEMBLES POINTING TOWARD MUCH MORE PRECIP IN DYNAMICS AHEAD OF THE DEVELOPING LOW FOR SUN NIGHT INTO MON. WILL KEEP THE EARLY EXTENDED WETTER AND COOLER THAN MEX MOS. FCSTID = 33 GSP 70 82 67 82 / 60 60 40 30 AND 70 82 67 82 / 60 60 40 30 CLT 70 82 64 81 / 60 50 30 20 HKY 68 78 62 78 / 60 50 30 20 AVL 65 77 62 78 / 80 60 40 30 .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 |
|---|---|---|---|---|
| Aug 31, 4:39 PM EDT | Severe Thunderstorm Warning | GSP | Anderson | 36 min |
| Aug 31, 4:56 PM EDT | Severe Thunderstorm Warning | GSP | Greenville | 34 min |
| Aug 31, 5:15 PM EDT | Severe Thunderstorm Warning | GSP | Spartanburg | 45 min |
| Aug 31, 5:46 PM EDT | Severe Thunderstorm Warning | GSP | Laurens | 29 min |
| Aug 31, 6:05 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee | 25 min |
| Aug 31, 6:33 PM EDT | Severe Thunderstorm Warning | GSP | Chester, Union, York | 42 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; radar from the NEXRAD Level II archive.