Alert archive / North Carolina / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 280, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 7, 2007, 4:14 PM EDT for Mecklenburg County, North Carolina. It was in force for 33 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 7, 2007, 4:14 PM EDT (20:14 UTC)
- Expired
- Jul 7, 2007, 4:47 PM EDT
- In force
- 33 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Counties, with a storm outline in the text
County Mecklenburg County, NC
The radar
The Greer radar (KGSP), 133 km from the middle of the area, began a volume at 20:15 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
Charleston AFB, SC (KCHS), launched 12:00Z, 8.2 hours before the alert went out and 272 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
- 1379 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 7, 3:06 PM EDT, 1 hour 8 minutes earlier.
Area forecast discussion, Jul 7, 3:06 PM EDT, 1 hour 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 306 PM EDT SAT JUL 7 2007 .SYNOPSIS... AN AREA OF LOW PRESSURE WILL TRACK EAST ALONG A WEAK FRONT LAYING ACROSS THE CAROLINAS THROUGH MONDAY. BY MID WEEK THE LOW WILL MOVE NORTH ALLOWING MOISTURE FROM THE GULF OF MEXICO AND HOT TEMPERATURES TO RETURN. LATE IN THE WEEK A COLD FRONT WILL MOVE INTO THE SOUTHEAST. && .NEAR TERM /THROUGH SUNDAY/... WEAK SFC BOUNDARY LIES ACROSS CWA WITH PLENTY OF LOW LEVEL MOISTURE...ESP ALONG AND S OF BOUNDARY. MODELS BRING WEAK UPPER LOW TOWARD AREA FROM THE W WITH WEAK UPPER FORCING MOVING IN WITH IT. COMBINED WITH EFECTS OF SFC HEATING THROUGH LATE AFTN...EXPECT AT LEAST SCT SHWRS/TSTMS THRU THIS EVE...ESPECIALLY OVER SW HALF FORECAST AREA WHERE LIKELY POPS ARE CARRIED...TAPERING TO SLIGHT CHANCE IN THE FAR NE CWA. TONIGHT...EXPECT SLIGHT CHANCE POPS N AND LOW CHANCE S OVERNIGHT SINCE NOCTURNAL CONVECTION POSSIBLE IN CONTINUED INSTABILITY AND FORCING. INCREASED CLOUDS OVERNIGHT WILL KEEP LOW TEMPS MILD. SUNDAY...GFS SHOWS WEAK SFC BOUNDARY AND WEAK UPPER FORCING TO CONTINUE ALONG S PART OF CWA WITH SIGNIFICANT MOISTURE REMAINING. HAVE EXPANDED AREA OF CHANCE POPS INTO S NC WITH SOLID CHANCE POPS ACROSS UPSTATE SC AND NE GA. TEMPS SHOULD BE SLIGHTLY COOLER IN THE W...MAINLY DUE TO INCREASED CLOUD COVER. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/... FAIRLY SIGNIFICANT DIFFERENCE BETWEEN NAM AND GFS WITH REGARD TO EXTENT OF MOISTURE AND DEPTH OF MOIST LAYER ACROSS THE CWA SUNDAY NIGHT AND MONDAY. HAVE FOLLOWED THE GENERAL TREND OF THE GFS WHICH DEPICTS RELATIVELY DRY AIR ACROSS NORTHERN SECTIONS WITH TIGHT MOISTURE GRADIENT ACROSS SOUTH. THIS RESULTS IN LOW CHANCE POPS SOUTHERN TIER OF ZONES OVERNIGHT SUNDAY NIGHT. BOTH GFS AND NAM INDICATE WEAK SURFACE TROUGH IN THE VICINITY DURING MONDAY. RATHER THAN TOTALLY DISCOUNT THE HIGHER NAM RELATIVE HUMIDITY... WILL INCLUDE POPS ACROSS ENTIRE CWA DURING DAYTIME MONDAY WITH HIGHEST VALUES ACROSS THE SOUTHEAST AND IN THE SOUTHWEST MOUNTAINS. SLIGHT CHANCE POPS WILL APPEAR IN NORTHWEST PIEDMONT OF NC. BY TUESDAY... THE GFS PLACES A SURFACE TROUGH IN CENTRAL PORTION OF THE CAROLINAS. HIGHEST MEAN RELATIVE HUMIDITY IS OVER THE MOUNTAINS WITH RELATIVELY DRY AIR ACROSS EASTERN ZONES. THIS PATTERN SUPPORTS CHANCE POPS ACROSS MOUNTAINS AND SLIGHT CHANCE ACROSS PIEDMONT. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... TUESDAY NIGHT AND WEDNESDAY SURFACE PATTERN WILL BE DOMINATED BY BERMUDA HIGH EXTENDING WESTWARD INTO SOUTHEASTERN U.S. WITH AXIS OF HIGH ACROSS GULF COAST REGION. WEAK TROUGH WILL PERSIST ACROSS CENTRAL CAROLINAS WITH SUFFICIENT MOISTURE IN COMBINATION WITH VERY WARM SURFACE TEMPERATURES TO JUSTIFY CHANCE POPS. DIURNAL HEATING WILL PRODUCE BEST COVERAGE DURING AFTERNOON AND EVENING WITH LESSER COVERAGE DURING THE MORNING. A LITTLE BETTER CHANCE OF SHOWERS AND THUNDERSTORMS WILL EXIST THURSDAY INTO FRIDAY AS COLD FRONT APPROACHES FROM THE NORTHWEST. FOR THE LATTER PART OF THE WEEK... LATE FRIDAY AND SATURDAY... FOLLOWED MOS AND HPC GUIDANCE WHICH FAVORS CHANCE POPS... PRIMARILY AFTERNOONS AND EVENINGS. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... SHWRS/TSTMS WILL CONTINUE IN AREA OF DEEPER MOISTURE AND BETTER UPPER FORCING...RANGING FROM NUMEROUS IN THE SW TO ISOLD IN THE NE. HAVE CB CLOUDS ALL SITES THIS AFTN-EVE WITH VCTS ALL SITES BUT KHKY. IF TEMPO NEEDED FOR TSTMS WILL AMD WITH MVFR CIG/VIS. WINDS LIGHT THRU PERIOD. EXPECT SCT CONVECTION OVERNIGHT BUT NOT ENOUGH CHANCE OFR MENTION IN TAFS ATTM. CONVECTIVE DEBRIS WILL PERSIST OVERNIGHT WITH MVFR FOG EXPECTED AT ALL TAF SITES TOWARD DAYBREAK SUN. ANY SITE THAT GETS SIG RAINFALL COULD SEE AT LEAST TEMPO IFR CONDITIONS AROUND SUNRISE. WITH NO CHANGE IN AIRMASS AND WEAK UPPER FORCING...EXPECT SCT CONVECTION AGAIN SUN...MAINLY ACROSS S CWA. AVIATION OUTLOOK...EXPECT SLIGHT CHANCE TO CHANCE OF MAINLY DIURNAL CONVECTION EACH DAY WITH BEST CHANCE OVER MTNS. A COLD FRONT WILL APPROACH FROM THE W AFTER MID WEEK...BRINGING INCREASED CONVECTION TO AREA. MVFR VSBY WILL BE POSSIBLE EACH MORNING THROUGH THE OUTLOOK PERIOD. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...PAT NEAR TERM...RB SHORT TERM...LGL LONG TERM...LGL AVIATION...RB
Hazardous weather outlook, Jul 7, 5:39 AM EDT, 10 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 539 AM EDT SAT JUL 7 2007 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-081000- 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 SAT JUL 7 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. 07
In the hours before
Special weather statement, Jul 7, 1:50 PM EDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 150 PM EDT SAT JUL 7 2007 SCZ009-071845- YORK- 150 PM EDT SAT JUL 7 2007 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN YORK COUNTY THROUGH 245 PM EDT... AT 144 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES SOUTH OF HICKORY GROVE...OR 11 MILES SOUTHWEST OF YORK...MOVING EAST AT 15 MPH. PEA SIZE HAIL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. BRIEF HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES SO AVOID THESE AREAS. RB
Special weather statement, Jul 7, 3:45 PM EDT, 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 345 PM EDT SAT JUL 7 2007 NCZ071-072045- MECKLENBURG- 345 PM EDT SAT JUL 7 2007 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN MECKLENBURG COUNTY THROUGH 445 PM EDT... AT 341 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES SOUTHEAST OF SOUTHPARK MALL...OR 7 MILES SOUTHEAST OF CENTER CITY CHARLOTTE. THIS STORM WAS NEARLY STATIONARY. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO CENTER CITY CHARLOTTE...SOUTHPARK MALL...EASTLAND MALL...UNC CHARLOTTE...MINT HILL AND MATTHEWS. PEA SIZE HAIL...TORRENTIAL RAIN AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. RB
Local storm report, Jul 7, 3:50 PM EDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
350 PM EDT SAT JUL 07 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM HAIL 1 SE ORA 34.57N 81.98W
07/07/2007 E0.88 INCH LAURENS SC PUBLIC
&&
NEDThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:24 PM EDT | Severe Thunderstorm Warning | GSP | York | 55 min |
| Jul 7, 2:34 PM EDT | Severe Thunderstorm Warning | GSP | Laurens | 35 min |
Nearby
Severe Thunderstorm Warnings in North 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.