Alert archive / South Carolina / Tornado Warnings in 1999
Tornado Warning 8, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this tornado warning at Oct 4, 1999, 9:37 AM EDT for Oconee County, South Carolina. It was in force for 33 min. 1 report 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
- Oct 4, 1999, 9:37 AM EDT (13:37 UTC)
- Expired
- Oct 4, 1999, 10:10 AM EDT
- In force
- 33 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Oconee County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 4, 9:45 AM EDT | Tornado F0 | Tokeena Xrds, 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, 1.6 hours before the alert went out and 203 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
- 594 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 654 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KGSP 041338 RRA TORGSP SCC073-041410- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 937 AM EDT MON OCT 4 1999 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN OCONEE COUNTY IN SOUTH CAROLINA * UNTIL 1010 AM EDT * AT 936 AM...NATIONAL WEATHER SERVICE RADAR INDICATED A DEVELOPING TORNADO 3 MILES WEST OF OAKWAY OR 5 MILES SOUTH OF WESTMINSTER... MOVING EAST AT 25 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... OAKWAY AT 945 AM SENECA AT 10 AM $$ JONES
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Oct 4, 9:30 AM EDT, 7 minutes earlier.
Area forecast discussion, Oct 4, 9:30 AM EDT, 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 930 AM EDT MON OCT 4 1999 LINE OF THUNDERSTORMS MOVING SLOWLY THROUGH WRN CAROLINAS/NE GA. STRONGEST CONVECTION FROM GSP SOUTH. LINE WELL AHEAD OF FRONT WHERE BEST CONVERGENCE WITHIN MOISTURE PLUME FROM GULF DISTURBANCE. EXITING MID LEVEL JETLET PROVIDING SOME FORCING BUT MORE IMPORTANTLY ...LOW LEVEL JET THROUGH AL/GA FEEDING SYSTEM. DEEP MOISTURE LIMITING BOUYANCY WITH MAX SBCAPE PROGGED AT BTWN 1000-1200 WITH MAX OF 73...WHICH SEEMS OUT OF REACH WITH CONTINUED RAIN. WHILE NOT IDEAL...LOW LEVEL WIND FIELDS SUGGEST THAT SOME BROAD CIRCULATION COULD DEVELOP...POSSIBLY PRODUCING AN ISOLATED DAMAGING STORM. MINOR WAVE IN FLOW COULD TURN WIND FIELD THIS AFTERNOON AS MEAN TROUGH SLIDES EAST. WILL NOT CHANGE FORECAST MUCH...LEAVING POPS HIGH...MAYBE BUMPING UP TO CATEGORICAL. TEMPERATURES WILL NEED TO BE ADJUSTED AS WELL. DELGADO .GSP...NONE.
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 4, 11:52 AM EDT | Flash Flood Warning | GSP | Greenville | 3 hr |
Nearby
Tornado Warnings in South Carolina, 1999Every tornado warning in 1999Tornadoes 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.