Alert archive / North Carolina / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 70, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 23, 2007, 2:56 PM EDT for Transylvania County, North 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
- May 23, 2007, 2:56 PM EDT (18:56 UTC)
- Expired
- May 23, 2007, 3:45 PM EDT
- In force
- 49 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Counties, with a storm outline in the text
County Transylvania County, NC
The radar
The Greer radar (KGSP), 70 km from the middle of the area, began a volume at 18:57 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.9 hours before the alert went out and 255 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1244 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -122 m²/s²
- 0-3 km storm-relative helicity
- -97 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 231856 SVRGSP NCC175-231945- /O.NEW.KGSP.SV.W.0070.070523T1856Z-070523T1945Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 256 PM EDT WED MAY 23 2007 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN TRANSYLVANIA COUNTY IN WESTERN NORTH CAROLINA * UNTIL 345 PM EDT * AT 251 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS STORM WAS LOCATED 7 MILES WEST OF BREVARD...OR ABOUT NEAR BALSAM GROVE...AND WAS MOVING WEST AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... BALSAM GROVE AT 310 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. SEEK SHELTER INDOORS AWAY FROM WINDOWS AND DOORS UNTIL THE STORM PASSES. TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING...THROUGH OUR AUTOMATED REPORTING SYSTEM...CALL OUR TOLL FREE NUMBER... 1 8 7 7...6 3 3...6 7 7 2. LAT...LON 3517 8283 3531 8278 3529 8290 3518 8297 $$ BSH
2 follow-up statements
000 WWUS52 KGSP 231911 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 311 PM EDT WED MAY 23 2007 NCC175-231945- /O.CON.KGSP.SV.W.0070.000000T0000Z-070523T1945Z/ TRANSYLVANIA NC- 311 PM EDT WED MAY 23 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR WESTERN TRANSYLVANIA COUNTY... AT 311 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS STORM WAS LOCATED NEAR BALSAM GROVE...OR ABOUT 9 MILES WEST OF BREVARD...MOVING WEST AT 10 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN TO THE NORTH OF BALSAM GROVE. PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM. SEEK SHELTER INDOORS AWAY FROM WINDOWS AND DOORS UNTIL THE STORM PASSES. LAT...LON 3521 8282 3531 8279 3529 8290 3520 8293 $$ BSH
000 WWUS52 KGSP 231939 SVSGSP SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 338 PM EDT WED MAY 23 2007 NCC175-231948- /O.EXP.KGSP.SV.W.0070.000000T0000Z-070523T1945Z/ TRANSYLVANIA NC- 338 PM EDT WED MAY 23 2007 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL TRANSYLVANIA COUNTY EXPIRES AT 345 PM EDT... ALTHOUGH THE STORM HAS WEAKENED NORTH OF THE BALSAM GROVE AREA...IT WILL CONTINUE TO PRODUCE BRIEF PERIODS OF HEAVY RAINFALL IN THE WESTERN PART OF THE COUNTY. LAT...LON 3521 8282 3531 8279 3529 8290 3520 8293 $$ BSH
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 May 23, 2:02 PM EDT, 54 minutes earlier.
Area forecast discussion, May 23, 2:02 PM EDT, 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 202 PM EDT WED MAY 23 2007 .SYNOPSIS... AN UPPER LEVEL RIDGE LOCATED OVER THE EASTERN THIRD OF THE COUNTRY WILL REMAIN NEARLY STATIONARY THROUGH THURSDAY...WHILE SURFACE HIGH PRESSURE SLIDES SOUTHWARD ALONG THE EAST COAST. BY THE END OF THE WEEK...THE UPPER RIDGE WILL WEAKEN AS AN UPPER LOW LIFTS NORTHEASTWARD INTO CANADA OUT OF THE CENTRAL PLAINS. SURFACE HIGH PRESSURE WILL PERSIST ACROSS THE WESTERN ATLANTIC THROUGH EARLY NEXT WEEK...WITH UNSEASONABLY WARM AND DRY WEATHER CONTINUING FOR THE WESTERN CAROLINAS AND NORTHEAST GEORGIA. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... THE CURRENT FORECAST LOOKS ON TRACK FOR THIS AFTERNOON. STRATOCU DECK OVER THE NORTHEASTERN HALF OF CWFA PERSISTING INTO THE MIDDAY HOURS. OTHERWISE...MOSTLY SUNNY TILL EARLY AFTERNOON...THEN PARTLY SUNNY WITH CU EXPECTED TO DEVELOP WITH DAYTIME HEATING. ADJUSTED GRIDS TO REFLECT LATEST OBS. LEFT POPS AS IS...EXCEPT STARTING THEM AFTER 18Z...DUE TO THE DELAY IN CU DEVELOPMENT SO FAR. && .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/... ISOLATED TO WIDELY SCATTERED CONVECTION WILL REMAIN A POSSIBILITY... MAINLY IN AREAS ALONG/NEAR THE BLUE RIDGE THIS EVENING. DESPITE AN EASTERLY UPSLOPE FLOW THAT WILL CONTINUE FOR MUCH OF THE OVERNIGHT...AN ABSENCE OF DEEPER FORCING AND WANING INSTABILITY SHOULD RESULT IN CONVECTION DISSIPATING BY MIDNIGHT. MOISTURE IS SHUNTED WEST OF THE AREA BY THURSDAY. MEANWHILE... DEEP MIXING WILL LIKELY CAUSE DEWPOINTS TO FALL INTO THE LOWER 50S (IF NOT LOWER) BY AFTERNOON. THIS WILL PRECLUDE SIGNIFICANT DESTABILIZATION. THEREFORE...WE DO NOT EXPECT ANYTHING IN THE WAY OF DIURNAL CONVECTION ON THURSDAY. && .LONG TERM /SUNDAY THROUGH TUESDAY/... I WILL USE A BLEND OF HPC/GFS FOR THE DETAILS OF THE EXTENDED RANGE FORECAST. DEEP RIDGING WILL PERSIST OVER THE SOUTHEAST CONUS THIS WEEKEND AND SLOWLY WEAKEN EARLY NEXT WEEK. GUIDANCE INDICATES THAT ONLY RIDGE TOP CONVECTION IS POSSIBLE THROUGH THE PERIOD...LIMITED TO ONLY ISOLATED COVERAGE. POPS MAY INCREASE SLIGHTLY TUES AND WED AFTERNOON AS A S/W RIPPLES EAST ALONG THE INTERNATIONAL BORDER AND A ASSOCIATED COLD FRONT SLIDES SOUTH INTO THE MID ATLANTIC. I WILL KEEP ANY MENTION OF CHC SHRA AND TSRA OVER THE NORTH MOUNTAINS AND ADJACENT FOOTHILLS. TEMPERATURES ACROSS THE CWA SHOULD REMAIN AT OR SLIGHTLY WARMER THAN CLIMATOLOGY THROUGH THE PERIOD...I USED A BLEND OF THE MEN AND HPC VALUES. && .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... LOW LEVELS DRY OUT SOMEWHAT TONIGHT...EXCEPT FOR IN THE MOUNTAINOUS AREAS WHERE FOG IS POSSIBLE. KEPT THE VSBYS IN THE TAFS AT 5SM FOR KAVL AND KHKY. LIGHT EASTERLY/SOUTHEASTERLY WINDS AND SKC CONDITIONS EXPECTED FROM 12Z THROUGH THE END OF THE TAF PERIOD. AVIATION OUTLOOK...INCREASING MOISTURE WITH EASTERLY FLOW OFF THE ATLANTIC COULD RESULT IN RESTRICTIONS TO CEILINGS THURSDAY MORNING...THOUGH ANY LOW CLOUDS ARE EXPECTED TO BE PATCHY IN NATURE. HIGH PRESSURE WILL THEN BUILD BACK TO THE WEST OVER THE REGION BY LATE WEEK. THIS SHOULD DECREASE THE CHANCE OF LOWER CIGS BUT MORNING FOG WILL BECOME MORE LIKELY...ESPECIALLY AT FOG PRONE SITES SUCH AS KAVL AND KAND. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && SYNOPSIS...BSH NEAR TERM...AK SHORT TERM...CSH/JDL LONG TERM...NED AVIATION...AK/BPM
Hazardous weather outlook, May 23, 5:18 AM EDT, 9 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 518 AM EDT WED MAY 23 2007 GAZ010-017-018-NCZ033-035-048>053-056-058-059-062>065-068-501>510- SCZ001>007-240930- RABUN-HABERSHAM-STEPHENS-AVERY-ALEXANDER-MADISON-YANCEY-MITCHELL- SWAIN-HAYWOOD-BUNCOMBE-CATAWBA-GRAHAM-NORTHERN JACKSON-MACON- SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-CLEVELAND-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- 518 AM EDT WED MAY 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING OVER THE FOOTHILLS AND MOUNTAINS OF THE WESTERN CAROLINAS AND NORTHEAST GEORGIA. ONE OR TWO THUNDERSTORMS COULD PRODUCE A BRIEF PERIOD OF LARGE HAIL AND DAMAGING WINDS. IN ADDITION...THE STRONGER STORMS COULD PRODUCE FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. GAZ026-028-029-NCZ036-037-057-069>072-082-SCZ008>014-019-240930- FRANKLIN-HART-ELBERT-IREDELL-DAVIE-ROWAN-LINCOLN-GASTON-MECKLENBURG- CABARRUS-UNION NC-CHEROKEE-YORK-ANDERSON-ABBEVILLE-LAURENS-UNION SC- CHESTER-GREENWOOD- 518 AM EDT WED MAY 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT NORTH CAROLINA AND UPSTATE SOUTH CAROLINA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. LANE
In the hours before
Special weather statement, May 23, 1:42 PM EDT, 1 hour 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 142 PM EDT WED MAY 23 2007 NCZ063-064-231830- SOUTHERN JACKSON-TRANSYLVANIA- 142 PM EDT WED MAY 23 2007 ...A STRONG THUNDERSTORM WILL AFFECT JACKSON AND TRANSYLVANIA COUNTIES THROUGH 230 PM EDT... AT 141 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR LAKE TOXAWAY...OR 15 MILES SOUTHWEST OF BREVARD...MOVING WEST AT 5 MPH. * OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED SAPPHIRE...LAKE TOXAWAY AND CASHIERS. SMALL HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. BSH
Special weather statement, May 23, 2:46 PM EDT, 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 246 PM EDT WED MAY 23 2007 NCZ063-231930- SOUTHERN JACKSON- 246 PM EDT WED MAY 23 2007 ...A STRONG THUNDERSTORM WILL AFFECT JACKSON COUNTY THROUGH 330 PM EDT... AT 243 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES NORTHEAST OF CASHIERS...OR 18 MILES WEST OF BREVARD...MOVING WEST AT 5 MPH. THIS STORM WILL BE NEAR... LAKE THORPE BY 330 PM EDT. SMALL HAIL IS 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 AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.
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.