Alert archive / South Carolina / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 10, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 12, 2001, 4:47 PM EDT for Union County, South Carolina. It was in force for 43 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
- May 12, 2001, 4:47 PM EDT (20:47 UTC)
- Expired
- May 12, 2001, 5:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Union County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 4:51 PM EDT | Hail 0.75 | Union, SC | Just north of the border with Newberry County, general public reported hail hitting windows so hard they thought the windows would break. |
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, 8.8 hours before the alert went out and 220 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
- 23 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KGSP 122048 SVRGSP SCC087-122130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 447 PM EDT SAT MAY 12 2001 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN UNION COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 530 PM EDT * AT 447 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES SOUTH OF UNION...OR ABOUT 9 MILES WEST OF CARLISLE...MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CARLISLE AT 455 PM EDT PEOPLE IN THE PATH OF THIS SEVERE THUNDERSTORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGINGn WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. $$ MCAVOY
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 12, 2:44 PM EDT, 2 hours 3 minutes earlier.
Area forecast discussion, May 12, 2:44 PM EDT, 2 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 244 PM EDT SAT MAY 12 2001 ISOLATED TO WIDELY SCATTERED TRW DEVELOPING ACROSS FA THIS AFTERNOON. MOISTURE CONVERGENCE ALONG PREFRONTAL TROUGH AND MODERATELY UNSTABLE AIR MASS SHOULD KEEP CONVECTION GOING THROUGH SUNDOWN. ISOLATED SEVERE POSSIBLE...MAINLY HAIL. BEYOND THAT...ACTUAL FRONT TO MOVE THROUGH TONIGHT. HIGH BUILDS INTO AREA SUNDAY THROUGH TUESDAY. CLOSED LOW OFF EAST COAST WILL BRING SHORT WAVE TROUGH ACROSS OH VALLEY...DEEPENING MEAN TROUGH OVER SOUTHERN APPALACHIANS. THIS SHOULD BRING ANOTHER SHOT AT PRECIP TO WRN CAROLINAS BY WEDNESDAY. REPEAT PERFORMANCE FRIDAY NIGHT AND SATURDAY WILL BRING ANOTHER CHANCE OF RAIN. FCSTID = 11 GSP 54 75 47 79 / 20 0 0 0 AND 54 75 47 79 / 20 0 0 0 CLT 54 75 47 79 / 20 0 0 0 HKY 51 72 46 78 / 20 0 0 0 AVL 47 69 41 75 / 20 0 0 0 .GSP... GA...NONE. NC...NONE. SC...NONE.
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 2:54 PM EDT | Severe Thunderstorm Warning | GSP | Spartanburg | 51 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.