Alert archive / South Carolina / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 21, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 18, 2002, 3:26 PM EDT for Chester County, South Carolina. It was in force for 34 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
- Apr 18, 2002, 3:26 PM EDT (19:26 UTC)
- Expired
- Apr 18, 2002, 4:00 PM EDT
- In force
- 34 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Chester County, SC
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 18, 3:38 PM EDT | Thunderstorm Wind 50 E | Chester, SC | A few trees were blown down. |
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, 7.4 hours before the alert went out and 192 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
- 8 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1788 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 0 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 181926 SVRGSP SCC023-182000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 326 PM EDT THU APR 18 2002 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CHESTER COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 400 PM EDT * AT 326 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS 8 MILES SOUTHEAST OF CHESTER...OR ABOUT 6 MILES NORTHEAST OF CORNWELL...MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RICHBURG AT 340 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. $$ RWH
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 Apr 18, 2:39 PM EDT, 47 minutes earlier.
Area forecast discussion, Apr 18, 2:39 PM EDT, 47 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 239 PM EDT THU APR 18 2002 SCATTERED SHOWERS ONCE AGAIN DEVELOPING ACROSS MOUNTAIN ZONES THIS AFTERNOON...BUT WITH LESS COVERAGE/INTENSITY THAN OBSERVED YESTERDAY. CONDITIONS NEVERTHELESS REMAIN FAVORABLE FOR ISOLATED HAILERS AND LOCALLY HEAVY RAINFALL. WILL CARRY CHANCE POPS THROUGH THE EVENING IN THE MOUNTAINS AND NC FOOTHILLS...BUT MENTION ONLY ISOLATED TSRA ACROSS THE REMAINDER OF THE AREA. EAST COAST RIDGE WILL CONTINUE TO BE ATTACKED BY SERIES OF SW TROUGHS...RESULTING IN SOME FLATTENING OF THE RIDGE BY THE WEEKEND. TOMORROW LOOKS LIKE ALMOST A CARBON COPY OF TODAY...WITH WEAKENING SWS RIDING OVER THE RIDGE...WEAK UPPER LEVEL DIVERGENCE...AND SOME AFTERNOON BL CONVERGENCE IN VICINITY OF LEE TROUGH. WILL ONCE AGAIN MENTION CHANCE POPS IN THE MOUNTAINS AND NC FOOTHILLS...WITH A SILENT 20 ELSEWHERE. RAIN CHANCES IMPROVE SOME ON SATURDAY...AS WEAKENING RIDGE ALLOWS FRONTAL BOUNDARY TO SAG SOUTHWARD TOWARD THE AREA. NOT CONVINCED THAT MODELS ARE NOT OVERDOING HEIGHT FALLS ALONG EAST COAST...PLUS FRONTAL BOUNDARY WILL BE BATTLING VERY STRONG MIXING TO ITS SOUTH. THUS...WILL RAISE TEMPS ON SATURDAY IN ANTICIPATION OF A SLOWER FRONTAL MOVEMENT THAN ADVERTISED BY THE MODELS. IN FACT...WOULD NOT BE SURPRISED TO SEE FRONT HANG TO OUR NORTH UNTIL STRONG NORTHERN STREAM SW NUDGES BOUNDARY THROUGH THE AREA SUNDAY NIGHT/MONDAY. NEVERTHELESS...WILL CONTINUE TO SHOTGUN CHANCE POPS FOR THE ENTIRE AREA SATURDAY THROUGH SUNDAY NIGHT...WITH 40S NORTH AND 30S SOUTH. WILL LINGER PRECIP ACROSS SOUTHERN ZONES INTO MONDAY. DRIER AND COOLER AIRMASS FINALLY FILTERS IN BEHIND FRONT FOR TUESDAY AND WEDNESDAY. MEDIUM RANGE MODELS ADVERTISE ANOTHER FRONT FOR THE EAST COAST FOR WEDNESDAY/THURSDAY TIMEFRAME. HOWEVER...WILL HOLD OFF ON INTRODUCING PRECIP AT THIS TIME...AS ENSEMBLE GUIDANCE POPS REMAIN VERY LOW .GSP... GA...NONE. NC...NONE. SC...NONE. LANE
In the hours before
Special weather statement, Apr 18, 11:45 AM EDT, 3 hours 41 minutes before
GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014- 019-182000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1145 AM EDT THU APR 18 2002 ...A FEW SEVERE THUNDERSTORMS POSSIBLE AGAIN THIS AFTERNOON AND EVENING... WEATHER CONDITIONS THIS AFTERNOON WILL BE QUITE SIMILAR TO YESTERDAY...WHEN AFTERNOON THUNDERSTORMS DEVELOPED...AND A FEW PRODUCED LARGE HAIL. THE ATMOSPHERE WILL BECOME QUITE UNSTABLE AGAIN THIS AFTERNOON...WITH PLENTY OF MOISTURE IN PLACE NEAR THE SURFACE...AND QUITE COOL AIR ALOFT. ALTHOUGH THE COVERAGE OF STORMS THIS AFTERNOON IS EXPECTED TO BE SIMILAR TO WEDNESDAY...THE INTENSITY OF THE STORMS MAY BE A BIT STRONGER. THE MAIN THREAT WILL BE LARGE HAIL...FROM DIME TO GOLF BALL SIZED IN DIAMETER...AND PERHAPS A CHANCE OF LOCALIZED WIND DAMAGE. ALSO... VERY WEAK WIND FLOW THROUGHOUT THE ATMOSPHERE WILL CAUSE STORMS TO MOVE VERY SLOWLY...CAUSING LOCAL ACCUMULATIONS OF HAIL. THERE WILL ALSO BE SOME POTENTIAL FOR FLASH FLOODING...ESPECIALLY IN URBAN AREAS. THE BEST CHANCE OF SEVERE WEATHER IS EXPECTED IN THE WESTERN AND SOUTHERN MOUNTAINS OF NORTH CAROLINA...NORTHEAST GEORGIA...AND THE WESTERN TWO THIRDS OF UPSTATE SOUTH CAROLINA. A LARGE SCALE SEVERE WEATHER OUTBREAK IS NOT EXPECTED...BUT THERE COULD BE A FEW SEVERE STORMS AROUND. SPOTTER GROUPS SHOULD BE PREPARED TO ACTIVATE QUICKLY LATE THIS AFTERNOON AND THIS EVENING. DISPATCHERS SHOULD ENSURE COUNTY EMERGENCY PREPAREDNESS OFFICIALS ARE AWARE OF THIS INFORMATION. MOORE
Nearby
Severe Thunderstorm Warnings in South Carolina, 2002Every severe thunderstorm warning in 2002
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.