Alert archive / South Carolina / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 155, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 21, 2005, 2:59 PM EDT for Oconee County, South Carolina. It was in force for 62 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 21, 2005, 2:59 PM EDT (18:59 UTC)
- Expired
- Jul 21, 2005, 4:01 PM EDT
- In force
- 62 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Counties, with a storm outline in the text
County Oconee County, SC
The radar
The Greer radar (KGSP), 81 km from the middle of the area, began a volume at 18:59 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.0 hours before the alert went out and 200 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
- 299 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1251 m above ground
- 0-6 km bulk shear
- 1 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 5 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 211859 SVRGSP SCC073-212000- /O.NEW.KGSP.SV.W.0155.050721T1859Z-050721T2000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 259 PM EDT THU JUL 21 2005 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OCONEE COUNTY IN UPSTATE SOUTH CAROLINA * UNTIL 400 PM EDT * AT 254 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR WALHALLA...AND MOVING SOUTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WESTMINSTER AROUND 350 PM EDT... 7 MILES WEST OF SENECA AROUND 400 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 3488 8308 3480 8328 3451 8316 3463 8287 $$
2 follow-up statements
000 WWUS52 KGSP 211931 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 331 PM EDT THU JUL 21 2005 SCC073-212000- /O.CON.KGSP.SV.W.0155.000000T0000Z-050721T2000Z/ OCONEE SC- 330 PM EDT THU JUL 21 2005 ...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 400 PM EDT FOR OCONEE COUNTY... AT 324 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR WESTMINSTER...OR ABOUT 9 MILES SOUTHWEST OF WALHALLA...MOVING SOUTH AT 5 MPH. THE STORM HAD WEAKENED SOMEWHAT...BUT RADAR SHOWED STRONG THUNDERSTORMS GROWING IN STEPHENS COUNTY GEORGIA ALONG THE OCONEE LINE. ANOTHER STORM IN PICKENS COUNTY WAS MOVING SOUTH...AND COULD BUILD INTO SOUTHEAST OCONEE COUNTY. LAT...LON 3479 8303 3472 8327 3448 8307 3461 8286 $$ JONES
000 WWUS52 KGSP 212001 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 400 PM EDT THU JUL 21 2005 SCC073-212010- /O.EXP.KGSP.SV.W.0155.000000T0000Z-050721T2000Z/ OCONEE SC- 400 PM EDT THU JUL 21 2005 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN OCONEE COUNTY EXPIRED AT 400 PM EDT... HOWEVER...STRONG STORMS WERE STILL MOVING THROUGH THE WESTERN PART OF THE COUNTY...FROM WESMINSTER SOUTH. STRONG WINDS...FREQUENT INTENSE LIGHTNING...AND LOCALLY VERY HEAVY RAINFALL WILL OCCUR. LAT...LON 3479 8303 3472 8327 3448 8307 3461 8286 $$ JONES
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 21, 2:40 PM EDT, 19 minutes earlier.
Area forecast discussion, Jul 21, 2:40 PM EDT, 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 240 PM EDT THU JUL 21 2005 .SHORT TERM (TONIGHT THROUGH FRIDAY NIGHT)... CONVECTION TAKING ON A DIFFERENT PATTERN THIS AFTERNOON. CELLS MORE WIDESPREAD OVER GA/SC MTNS...WITH MUCH LESS COVERAGE ELSEWHERE. EXPECT SCT COVERAGE ALL AREAS GIVEN THE INSTABILITY...BUT LESS COVERAGE THAN PREVIOUS DAYS...ESP NC MTNS/FOOTHILLS. PWATS A LITTLE LOWER AND STORM MOTION A LITTLE FASTER THAN PREVIOUS DAYS...BUT ISOLATED FLASH FLOOD THREAT REMAINS. KEPT MAINLY DIURNAL CONVECTIVE TIMING...BUT WEAK MID LEVEL WAVE SEEN IN SAT PIX MOVING SE OVER KY COULD PROVIDE A FOCUS FOR CONVECTION OVERNIGHT. WILL KEEP ISOLATED CONVECTION ALL NITE NC MTNS. PATCHY DENSE VALLEY FOG EXPECTED AGAIN TONIGHT NC MTNS. WE STILL NEED TO WORK OUT THE TIMING FOR FRIDAY/FRIDAY NIGHT...BUT 12 UTC SHORT RANGE GUIDANCE IN DECENT ENOUGH AGREEMENT IN THE HANDLING OF A SHEARING S/WV MOVING ACROSS THE CWFA FRIDAY AFTERNOON AND/OR EVENING. POTENTIAL FOR STORMS TO ORGANIZE WITHIN INCREASED MID-LVL FLOW AND DEVELOPMENT ALONG EDGE OF DRYING ALOFT/COOL POOL...COULD LEAD TO WIDESPREAD CVRG WITH LOCALLY STRONG STORMS ...BUT GIVEN TIMING/STRENGTH UNCERTAINTY...WILL KEEP CHANCES SCATTERED UNTIL 06Z SATURDAY. && .LONG TERM (SATURDAY THROUGH THURSDAY)... UPPER HEIGHTS BEGIN THEIR RISE ON SATURDAY AS LARGE ANTICYCLONE BUILDS EASTWARD...EVENTUALLY PARKING ITSELF ATOP THE CWFA BY MONDAY. WITHIN THIS VERY WEAKLY FORCED ENVIRONMENT...ANY ISOLATED DAILY DEEP CONVECTIVE THREAT SHOULD BE LIMITED TO THE HIGHER TERRAIN IF NOT COMPLETELY SUPPRESSED. IT SHOULD BE PROGRESSIVELY HOT EACH DAY AS WELL WITH FTHL/PIEDMONT MAXES 90 TO 95 SATURDAY WARMING TO A MORE SOLID MIDDLE 90S ON MONDAY. INTERESTING DEWPOINT TRENDS NOTED ON THE 12 UTC MOS GUIDANCE WITH THE FWC/MET NUMBERS TUMBLING SATURDAY AFTERNOON...BUT MAV GUIDANCE HANGING TOUGH IN THE LOWER 70S. GIVEN THE DRY AND SUBSIDING AIRMASS...HAVE TO GIVE AT LEAST A PARTIAL NOD TO DEWPOINTS MIXING OUT SATURDAY AFTERNOON. HOPEFULLY THIS TREND WILL CONTINUE INTO SUNDAY AND MONDAY AS WELL...PERHAPS KEEPING US JUST SHY OF HEAT INDEX CRITERIA...WE WILL SEE. FOR DAYS 5-7...UPPER RIDGING SHIFTS EAST AND GIVES WAY TO FALLING HEIGHTS AND INCREASED RETURN FLOW ALLOWING TEMPERATURES TO RETURN BACK TO AROUND LATE JULY CLIMO AND INCREASING DAILY DEEP CONVECTIVE CHANCES. && .AVIATION... TODAY LOOKS LIKE A CARBON COPY OF THE PAST FEW DAYS. WILL TIME IN VCTS AND LOW VFR CIGS WITH A MVFR TSRA TEMPO AT KAVL. VCTS ENDS ABOUT 01Z THEN VFR UNTIL MVFR FOG DEVELOPS ABOUT 09Z. THE EXCEPTION ONCE AGAIN IS KAVL WHERE DENSE VALLEY FOG DEVELOPS WITH IFR VSBY/LIFR CIGS. VFR RETURNS ABOUT 13Z WITH CU...AND CB AT KAVL...DEVELOPING BY 16Z. A POSSIBLE FLY IN THE OINTMENT IS A MID LEVEL SWIRL SEEN IN SAT PIX MOVING SE THRU KY ATTM. THIS COULD CREATE A MORE FAVORABLE ENVIRONMENT FOR ORGANIZED CONVECTION AND KEEP TSRA AROUND LONGER THAN USUAL THIS EVENING. AS THIS IS NOT A CERTAINTY WILL LET NEXT SHIFT EXTEND TSRA IF NECESSARY. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SHORT TERM...RWH/CSH LONG TERM...CSH AVIATION...RWH
Hazardous weather outlook, Jul 21, 6:47 AM EDT, 8 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 647 AM EDT THU JUL 21 2005 GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082- SCZ001>014-019-221100- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-CALDWELL- ALEXANDER-IREDELL-DAVIE-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD- BUNCOMBE-MCDOWELL-BURKE-CATAWBA-ROWAN-GRAHAM-NORTHERN JACKSON- MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-POLK-RUTHERFORD- CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- OCONEE MOUNTAINS-PICKENS MOUNTAINS-GREENVILLE MOUNTAINS- GREATER OCONEE-GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG- CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER- GREENWOOD- 647 AM EDT THU JUL 21 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR UPSTATE SOUTH CAROLINA... MUCH OF WESTERN NORTH CAROLINA... AND EXTREME NORTHEAST GEORGIA. .DAY ONE...TODAY AND TONIGHT SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP ONCE AGAIN THIS AFTERNOON ACROSS THE AREA. THERE WILL BE A THREAT OF ISOLATED DAMAGING WIND GUSTS AND LOCALIZED FLASH FLOODING WITH THE STRONGER STORMS. STORMS WILL BE MOST NUMEROUS ACROSS THE NORTH CAROLINA MOUNTAINS. THUS THE THREAT OF FLASH FLOODING AND DAMAGING WIND GUSTS WILL BE GREATEST THERE. IN ADDITION...HEAT INDEX VALUES OF AROUND 100 WILL BE REALIZED FOR A COUPLE OF HOURS THIS AFTERNOON...ESPECIALLY ACROSS THE SOUTHERN PIEDMONT OF NORTH CAROLINA. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS THE AREA AGAIN ON FRIDAY. THE THREAT FOR DAMAGING WIND GUSTS WILL BE SLIGHTLY HIGHER ON FRIDAY...WHILE THE THREAT FOR FLASH FLOODING WILL BE SLIGHTLY LOWER. COVERAGE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL DECREASE OVER THE WEEKEND. MEANWHILE... TEMPERATURES WILL INCREASE THROUGH EARLY NEXT WEEK. HEAT INDEX VALUES WILL PROBABLY EXCEED 100 FOR SEVERAL HOURS ACROSS THE PIEDMONT AND FOOTHILLS SUNDAY AND MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. LANE
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 4:27 PM EDT | Severe Thunderstorm Warning | GSP | Greenville | 50 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2005Every severe thunderstorm warning in 2005
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.