Alert archive / South Carolina / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 151, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 18, 2004, 7:56 PM EDT for Spartanburg County, South Carolina. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2004, 7:56 PM EDT (23:56 UTC)
- Expired
- Jul 18, 2004, 8:45 PM EDT
- In force
- 49 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Counties, with a storm outline in the text
County Spartanburg County, SC
The radar
The Greer radar (KGSP), 23 km from the middle of the area, began a volume at 23:57 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.9 hours before the alert went out and 227 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
- 282 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KGSP 182356 SVRGSP SCC083-190045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 755 PM EDT SUN JUL 18 2004 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SPARTANBURG COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 845 PM EDT * AT 752 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR INMAN...OR ABOUT 12 MILES SOUTHEAST OF COLUMBUS...AND MOVING SOUTH AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... INMAN AROUND 805 PM EDT NEAR BOILING SPRINGS SC AROUND 820 PM EDT LYMAN AROUND 840 PM EDT DUNCAN AROUND 845 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. LAT...LON 3520 8203 3514 8224 3482 8216 3489 8187 $$ 07
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 Jul 18, 2:41 PM EDT, 5 hours 15 minutes earlier.
Area forecast discussion, Jul 18, 2:41 PM EDT, 5 hours 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 241 PM EDT SUN JUL 18 2004 .SHORT TERM (TONIGHT THROUGH WEDNESDAY NIGHT)... VIS SAT ATTM SHOWING MAINLY RIDGELINE CU OVER THE MTNS WITH A ENHANCEMENT IN THE IMMEDIATE LEE...EAST...LOW TOPPED CU. MOISTURE CONVERGENCE OVER THE FOOTHILLS SHOULD CONTINUE UNTIL 0Z AS WEST MTN WINDS INTERACT WITH NE FLOW OFF THE ESCARPMENT. EAST FACING SLOPES/FTHILLS SHOULD BE THE BIRTHPLACE OF THE FIRST TS THIS AFTERNOON. ONCE SH/TS DEVELOP THEY SHOULD BE CARRIED SE AT 5 TO 10KTS. WILL CONTINUE CHC POPS THROUGH THE EVENING. LOWER FREEZING LEVELS...DRY MID-LEVEL AIR...AND MODERATELY UNSTABLE CONDITIONS WILL INCREASE THE CHCS FOR SVR STORMS THIS AFTERNOON AND EARLY EVENING. DWPTS ARE CURRENTLY RUNNING IN THE L60S WEST TO U60S EAST...LIKELY RESULTING IN CROSSOVER TEMPS A LITTLE LOWER. WITH LIGHT WINDS AND CLEARING SKY PREDICTED TONIGHT FORMATION OF FOG WILL BECOME A CONCERN. MOS DEPICTS A FEW PERIODS OF DENSE FOG IN THE MTN VALLEYS. WILL ADD PATCHY FOG MENTION IN THE GRIDS...WITH DENSE FOG HIGHLIGHTED IN THE VALLEYS. MON...UNSTABLE CONDITIONS WILL ONCE AGAIN DEVELOP IN THE AFTERNOON OVER THE FA. HOWEVER...PATTERN WILL BE LESS FAVORABLE FOR DEEP CONVECTION AS DEEP RIDGING BEGINS TO BUILD LATE IN THE DAY. WITH THE MAIN TRIGGER AS RIDGETOP CONVERGENCE I WILL HIGHLIGHT WITH CHC POPS...ELSEWHERE...COVERAGE SHOULD BE LIMITED TO ISO. TUE...ATMOS WILL DRY OUR FURTHER AND INSTABILITY IS EXPECTED TO PEAK LESS THAN 500 J/KG...WILL SIDE WITH A NO PRECIP MENTION GIVEN BY MOS. WED...A WEAK COLD FRONT WILL APPROACH THE NORTHERN TIER OF THE FA BY THE AFTERNOON. TEMPS ARE EXPECTED TO INCREASE A FEW DEGREES OVER TUES VALUES AND DWPTS RISE AS WELL. POOLING CAPES WEST OF THE MTNS WILL COMBINE WITH WEAK UPSLOPE FLOW AND MAY INITIATE SH/TS. I WILL ADVERTISE MAINLY CHC MTN POPS. && .LONG TERM (THURSDAY THROUGH SUNDAY)... REGION LIES BETWEEN SYSTEMS ON THU AS UPPER TROF FILLS AND MOVES OFF TO THE NE WHILE HI PRES REMAINS CENTERED OVER THE W US. HAVE KEPT CHANCE PRECIP OVER MTNS THU WITH SLIGHT CHANCE ELSEWHERE. STRONG UPPER LOW OVER CANADA EXPECTED TO KEEP SENDING AN OCCASIONAL WEAK SHORTWAVE TOWARD REGION...WITH A COLD FRONT FCST TO DROP SE AND THROUGH THE AREA ON SAT. THIS WILL BRING A CONTINUED CHANCE OF RAIN THROUGH THE WEEKEND. && .AVIATION... WITH FRONTAL BOUNDARY TO THE SE ALONG THE BORDER OF THE PIEDMONT MOVING INTO THE MIDLANDS...BEST MOISTURE AND INSTABILITY REMAINS SE OF FORECAST AREA. ATMOSPHERE ALONG AND SE OF I-85 HOWEVER IS STILL UNSTABLE ENOUGH FOR SOME STRONG THUNDERSTORMS THIS AFTN-EVE. HAVE INCLUDED CB CLOUD TYPE AND VCTS FOR TAF SITES ALONG I-85. EXPECT MVFR FOG LATE TONIGHT INTO EARLY MORNING WITH IFR FOG ALONG FRENCH BROAD VALLEY AT KAVL FOR A COUPLE HOURS AFTER SUNRISE. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SHORT TERM...NED LONG TERM/AVIATION...RB
Hazardous weather outlook, Jul 18, 5:57 AM EDT, 13 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 557 AM EDT SUN JUL 18 2004 GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014- 019-191000- ABBEVILLE SC-ALEXANDER NC-ANDERSON SC-AVERY NC-BUNCOMBE NC-BURKE NC- CABARRUS NC-CALDWELL NC-CATAWBA NC-CHEROKEE SC-CHESTER SC- CLEVELAND NC-DAVIE NC-ELBERT GA-FRANKLIN GA-GASTON NC-GRAHAM NC- GREATER GREENVILLE SC-GREATER OCONEE SC-GREATER PICKENS SC- GREENVILLE MOUNTAINS SC-GREENWOOD SC-HABERSHAM GA-HART GA-HAYWOOD NC- HENDERSON NC-IREDELL NC-LAURENS SC-LINCOLN NC-MACON NC-MADISON NC- MCDOWELL NC-MECKLENBURG NC-MITCHELL NC-NORTHERN JACKSON NC- OCONEE MOUNTAINS SC-PICKENS MOUNTAINS SC-POLK NC-RABUN GA-ROWAN NC- RUTHERFORD NC-SOUTHERN JACKSON NC-SPARTANBURG SC-STEPHENS GA- SWAIN NC-TRANSYLVANIA NC-UNION SC-UNION NC-YANCEY NC-YORK SC- 557 AM EDT SUN JUL 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA... UPSTATE SOUTH CAROLINA...AND EXTREME NORTHEAST GEORGIA. .DAY ONE... SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON. AN ISOLATED SEVERE STORM OR TWO CANNOT BE RULED OUT. SEE THE LATEST SEVERE WEATHER OUTLOOK...UNDER THE PIL CAESPSGSP...FOR DETAILS. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON FOR A PORTION OF OUR FOREFCAST AREA. 44
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:11 PM EDT | Flash Flood Warning | GSP | Greenville | 3 hr |
| Jul 18, 7:29 PM EDT | Flash Flood Warning | GSP | Greenville | 3 hr |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2004Every severe thunderstorm warning in 2004
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.