Alert archive / South Carolina / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 314, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 17, 2007, 5:15 PM EDT for Laurens County, South Carolina. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2007, 5:15 PM EDT (21:15 UTC)
- Expired
- Jul 17, 2007, 6:15 PM EDT
- In force
- 60 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Counties, with a storm outline in the text
County Laurens County, SC
The radar
The Greer radar (KGSP), 49 km from the middle of the area, began a volume at 21:18 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.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.3 hours before the alert went out and 261 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
- 501 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1186 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 17, 2:33 PM EDT, 2 hours 42 minutes earlier.
Area forecast discussion, Jul 17, 2:33 PM EDT, 2 hours 42 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 233 PM EDT TUE JUL 17 2007 .SYNOPSIS... A WARM AND MOIST AIR MASS WILL LINGER OVER THE AREA THROUGH THURSDAY. A COLD FRONT WILL CROSS THE AREA ON FRIDAY...FOLLOWED BY DRIER AND COOLER AIR THAT WILL LINGER THROUGH THE WEEKEND. && .NEAR TERM /THROUGH WEDNESDAY/... MAIN FORECAST PROBLEM IN NEAR TERM IS THE AMOUNT OF CONVECTION TO EXPECT EACH PERIOD. FOR TONIGHT...STILL EXPECTING RATHER WIDESPREAD COVERAGE OF THUNDERTORMS...AT LEAST DURING THE EVENING HOURS. THUNDERSTORMS COULD PERSIST UNTIL AROUND MIDNIGHT IN THE NC PIEDMONT/FOOTHILLS. MODEL DETAILS NOT EXACTLY IN AGREEMENT...BUT THEY DO AGREE THAT AN AREA OF DECENT LIFT/OMEGA WILL MOVE FROM NE GA...ACROSS UPSTATE SC AND INTO NC AROUND MIDNIGHT. LATEST RUC FORECAST ALSO SUPPORTS THIS IDEA. THEREFORE WILL FORECAST LIKELY POPS IN THE UPSTATE...WESTERN NC THIS EVENING TRANSITIONING INTO THE NC PIEDMONT FOOTHILLS 03Z-06Z TIMEFRAME. COULD HAVE A RATHER DECENT CONVECTIVE COMPLEX EVOLVE SO I HAVE ALSO BEEFED UP THE QPF FIELD FOR TONIGHT AS PRECIPITABLE WATER FORECAST TO BE AROUND 2 INCHES AND HAVE CODED THE MENTION OF HEAVY RAIN. EXPECT THINGS TO SETTLE DOWN AFTER MIDNIGHT WITH LOW CLOUDS/FOG FILLING IN BEHIND THUNDERSTORMS. STAYED WITH MOS BLEND FOR OVERNIGHT LOWS. ON WED. THE QUESTION AGAIN IS HOW MUCH CONVECTION TO EXPECT. FORCING DOES NOT APPEAR TO BE AS GOOD SO I HAVE ACTUALLY GONE BELOW SREF POPS. RESULT IS SOLID CHANCE POPS MOUNTAINS RANGING TO LOW CHANCE PIEDMONT AREAS. ANOTHER VERY WARM DAY IS IN STORE FOR WED PER MOS BLEND. && .SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/... THE UPPER TROUGH OVER THE EASTERN USA AMPLIFIES ON THURSDAY AND FRIDAY...AS A PAIR OF SHORTWAVES DIVES INTO ITS BASE. CONVECTIVE ACTIVITY WILL BE EXTINGUISHED WEDNESDAY NIGHT AS THE ATMOSPHERE STABILIZES. ALTHOUGH MODEL GUIDANCE POPS ARE RATHER LOW ON THURSDAY...DEEP MOISTURE...INSTABILITY...AND THE PASSAGE OF A WEAK UPPER IMPULSE SUGGEST THAT LOW CHANCE POPS ARE IN ORDER. BY THE TIME DIURNALLY DRIVEN ACTIVITY WANES THURSDAY EVENING...THE FIRST SHORTWAVE APPROACHES...SUGGESTING THAT CONVECTION MAY LINGER LATER INTO THE NIGHT. A COLD FRONT ASSOCIATED WITH THE SECOND AND STRONGER SHORTWAVE WILL CROSS THE AREA ON FRIDAY. MODEL TIME HEIGHTS DIFFER ON THE AMOUNT OF UPWARD VERTICAL MOTION WITH THIS BOUNDARY...AND THE GULF WILL BE CLOSED DURING ITS PASSAGE...SO FOR NOW POPS WILL BE LIMITED TO HIGH CHANCE. TEMPERATURES WILL BE SEVERAL DEGREES ABOVE NORMAL THURSDAY...DESPITE FALLING HEIGHTS...IN WEAK WARM ADVECTION. TEMPERATURES FALL TO AROUND OR JUST BELOW NORMAL ON FRIDAY UNDER INCREASED CLOUD COVER. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... AN ANOMALOUS UPPER LEVEL TROUGH WILL PERSIST OVER EASTERN NORTH AMERICA THROUGH THE EXTENDED PACKAGE. THE MAIN SURFACE FEATURE IS A FRONT WHICH STALLS SUFFICIENTLY FAR ENOUGH TO OUR EAST TO KEEP WIDESPREAD DEEP MOISTURE AT BAY. WITH A EASTERLY FLOW BEHIND THE FRONT...SOME CHANCE MAY EXIST FOR UPSLOPE OROGRAPHIC CONVECTION ALONG THE BLUE RIDGE ESCARPMENT...PARTICULARLY IN GA AND SC...WHICH WILL NOT BE AS DEEPLY INTO THE COOLER AND MORE STABLE AIR MASS. POPS HAVE BEEN LOWERED SIGNIFICANTLY FROM HPC GUIDANCE...BUT MAY STILL BE A BIT HIGH FOR HPC SKY COVER...WHICH WAS ADJUSTED UP SLIGHTLY. BETWEEN THE UNSEASONABLY LOW HEIGHTS ALOFT...AND THE COOLER SURFACE MASS...TEMPERATURES WILL BE BELOW NORMAL. && .AVIATION /19Z TUESDAY THROUGH SUNDAY/... RATHER COMPLICATED SET OF TAFS BECAUSE EXPECT CONVECTION TO BE RATHER WIDESPREAD LATE THIS AFTERNOON/EVENING AND MAYBE HANG ON AS LATE AS MIDNIGHT AROUND KCLT. RADAR ALREADY SHOWING SCATTERED THUNDERSTORMS OVER SC/NC WITH NUMEROUS OVER NE GA. ALTHOUGH GFS/NAM DIFFER IN THE THEIR DETAILS...THEY ARE IN AGREEMENT THAT AN AREA OF SIGNIFICANT LIFT/OMEGA WILL TRAVERSE UPSTATE SC INTO NC FROM ABOUT 00Z-06Z. RUC LENDS SUPPORT FOR THIS AS WELL. SO I AM TRENDING TOWARD FORECASTING A CONVECTIVE COMPLEX TO MOVE FROM NE GA...ACROSS UPSTATE SC AND INTO NC PIEDMONT BY 04Z. BULK OF THIS MAY STAY SOUTH OF KAVL. THUS...HAVE INCLUDED A 4 HOUR TEMPO GROUP FOR THUNDER AT ALL SITES WITH MVFR CONDITIONS. SINCE I AM EXPECTING QUITE A BIT OF RAINFALL WHICH SHOULD SATURATE LOWER LEVELS OF COLUMN...HAVE ALSO FORECASTED LATE NIGHT IFR STRATUS AND MVFR FOG. EXPECT IFR CONDTIONS TO IMPROVE TO VFR BY 15Z ON WED. AVIATION OUTLOOK...DIURNAL CONVECTION IS EXPECTED TO CONTINUE WED AND THU AFDTERNOONS. TEMPO MVFR CONDITIONS CAN BE EXPECTED IN ANY THUNDERSTORM...AND VERY BRIEF IFR VSBY POSSIBLE IN HEAVY DOWNPOURS. EARLY MORNING IFR/MVFR VSBY RESTRICTIONS DUE TO FOG CAN BE EXPECTED...ESPECIALLY WHERE AFTERNOON AND EVENING RAIN OCCURS...AND KAVL WILL SEE THE BEST CHANCE OF TEMPO IFR CONDITIONS EACH MORNING. A COLD FRONT WILL CROSS THE REGION ON FRIDAY WHICH SHOULD PROVIDE BETTER COVERAGE OF THUNDERSTORMS AND A BETTER CHANCE FOR A PERIOD OF MVFR/IFR CONDITIONS IN A THUNDERSTORM. THE FRONT WILL SHUNT RAINFALL AND MORNING FOG TO THE SOUTH OF THE REGION ON SAT AND SUN. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...JAT NEAR TERM...LG SHORT TERM...JAT LONG TERM...JAT AVIATION...LG
Hazardous weather outlook, Jul 17, 5:39 AM EDT, 11 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 539 AM EDT TUE JUL 17 2007 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-180945- RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-ALEXANDER- IREDELL-DAVIE-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-CATAWBA- ROWAN-GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA- HENDERSON-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC- CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-GREATER BURKE- MCDOWELL MOUNTAINS-EASTERN MCDOWELL-RUTHERFORD MOUNTAINS- GREATER RUTHERFORD-POLK MOUNTAINS-EASTERN POLK-OCONEE MOUNTAINS- PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-GREATER OCONEE- GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK- ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD- 539 AM EDT TUE JUL 17 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE WESTERN CAROLINAS AND NORTHEAST GEORGIA THIS AFTERNOON AND EVENING. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE...PRODUCING PENNY SIZED HAIL AND DAMAGING WINDS...ALONG WITH FREQUENT LIGHTNING AND TORRENTIAL RAIN. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, Jul 17, 1:14 PM EDT, 4 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 114 PM EDT TUE JUL 17 2007 NCZ033-050-171745- AVERY-MITCHELL- 114 PM EDT TUE JUL 17 2007 ...A STRONG THUNDERSTORM WILL AFFECT EASTERN MITCHELL AND SOUTHWESTERN AVERY COUNTIES THROUGH 145 PM EDT... AT 109 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES SOUTHEAST OF BAKERSVILLE...OR 5 MILES NORTHWEST OF SPRUCE PINE...MOVING EAST AT 10 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO SPRUCE PINE...MINNEAPOLIS...LEDGER...INGALLS...BANDANA AND BAKERSVILLE. SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. ARK
Special weather statement, Jul 17, 1:50 PM EDT, 3 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 150 PM EDT TUE JUL 17 2007 NCZ033-501>503-171830- AVERY-BURKE MOUNTAINS-CALDWELL MOUNTAINS-GREATER CALDWELL- 150 PM EDT TUE JUL 17 2007 ...A STRONG THUNDERSTORM WILL AFFECT NORTHERN BURKE...NORTHERN CALDWELL AND SOUTHEASTERN AVERY COUNTIES THROUGH 230 PM EDT... AT 147 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES SOUTH OF GLOBE...OR 10 MILES SOUTH OF BLOWING ROCK...MOVING EAST AT 5 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO UPTON... PATTERSON...GLOBE...EDGEMONT AND COLLETTSVILLE. SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. ARK
Special weather statement, Jul 17, 3:04 PM EDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 304 PM EDT TUE JUL 17 2007 GAZ010-171945- RABUN- 304 PM EDT TUE JUL 17 2007 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL RABUN COUNTY THROUGH 345 PM EDT... AT 303 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR NACOOHE LAKE...OR 10 MILES NORTH OF CLARKESVILLE...MOVING NORTHEAST AT 15 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO LAKE RABUN...NACOOHE LAKE...LAKE BURTON...TIGER...MOUNTAIN CITY... MOCCASIN CREEK STATE PARK...LAKEMONT AND CLAYTON. SMALL HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
Special weather statement, Jul 17, 3:30 PM EDT, 1 hour 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 330 PM EDT TUE JUL 17 2007 GAZ018-SCZ001-004-172015- GREATER OCONEE-OCONEE MOUNTAINS-STEPHENS- 330 PM EDT TUE JUL 17 2007 ...A STRONG THUNDERSTORM WILL AFFECT NORTHERN STEPHENS AND SOUTHERN OCONEE COUNTIES THROUGH 415 PM EDT... AT 328 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 7 MILES NORTHWEST OF LAKE HARTWELL...OR 7 MILES EAST OF TOCCOA...MOVING NORTHEAST AT 30 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO LAKE HARTWELL...TOCCOA...WESTMINSTER...WALHALLA...SENECA...OAKWAY AND LONG CREEK. SMALL HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
Special weather statement, Jul 17, 3:37 PM EDT, 1 hour 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 337 PM EDT TUE JUL 17 2007 GAZ028-172030- HART- 337 PM EDT TUE JUL 17 2007 ...A STRONG THUNDERSTORM WILL AFFECT HART COUNTY THROUGH 430 PM EDT... AT 333 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES WEST OF VANNA...OR 11 MILES SOUTHEAST OF CARNESVILLE...MOVING NORTHEAST AT 15 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO VANNA... REED CREEK...NUBERG...HARTWELL...CANON AND BOWERSVILLE. SMALL HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
Special weather statement, Jul 17, 4:14 PM EDT, 1 hour 1 minute before
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</html>The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 3:55 PM EDT | Severe Thunderstorm Warning | GSP | Oconee | 50 min |
| Jul 17, 4:00 PM EDT | Severe Thunderstorm Warning | GSP | Anderson | 45 min |
| Jul 17, 4:45 PM EDT | Severe Thunderstorm Warning | GSP | Anderson | 45 min |
| Jul 17, 4:51 PM EDT | Severe Thunderstorm Warning | GSP | Greenville | 54 min |
| Jul 17, 3:50 PM EDT | Severe Thunderstorm Warning | GSP | Hart | 40 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2007Every severe thunderstorm warning in 2007
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.