Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 112, NWS Greenville-Spartanburg, SC

July 24, 1999Gaston County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 24, 1999, 5:29 PM EDT for Gaston County, North Carolina. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 24, 1999, 5:29 PM EDT (21:29 UTC)
Expired: Jul 24, 1999, 6:15 PM EDT
In force: 46 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Gaston County, NC

What was reported inside it

Time	Report	Where	Remark
Jul 24, 5:50 PM EDT	Thunderstorm Wind 60	Gastonia, NC

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.5 hours before the alert went out and 145 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 841 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1567 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 24, 2:12 PM EDT, 3 hours 17 minutes earlier.

Area forecast discussion, Jul 24, 2:12 PM EDT, 3 hours 17 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
212 PM EDT SAT JUL 24 1999

CLOSED LOW TO FORM OVER QUEBEC AND CUTOFF OVER ME NEXT 24 HOURS.
SHORTWAVE SHOWN BY RUC TO REACH MOUNTAINS AT 21Z WILL CROSS AREA
SLOWLY OVERNIGHT. A SECOND...WEAKER SHORTWAVE SHOWN BY ETA TO
REACH N TIER SUN AFTERNOON...MOVING INTO SC SUN EVENING. NGM/AVN
MUCH WEAKER WITH SECOND FEATURE...AND NGM MUCH FASTER...ENDING PVA
EARLY SUN EVENING. MODELS BRING TROUGH OR WEAK FRONT DOWN EASTERN
SEABOARD TONIGHT. THIS FEATURE BECOMES STATIONARY OVER AREA INTO
MON...WITH MOST THICKNESS PACKING N AND E. NGM TROUGH STRONGER AND
OVER SC...ETA TROUGH WEAKER AND OVER NC. AVN COMPROMISES. SURFACE
RIDGE BEHIND BOUNDARY FAR ENOUGH W AND AT LOW ENOUGH LATITUDE THAT
SURFACE FLOW NOT LIKELY TO BE NE...BUT RATHER W-NW. MID/UPPER
LEVELS TO DRY OUT SUN MORNING. DOWNSLOPE COMPONENT TO INHIBIT
CONVECTION SUN. NVA...SUBSIDENCE AND CONTINUED DOWNSLOPE MON TO
WARM TEMPERATURES AS DEW POINTS LOWER. FWC MAX TEMPS VERY HIGH AND
HARD TO BUY...EVEN WITH DOWNSLOPE. WILL COMPROMISE BETWEEN FWC AND
FAN. DEW POINTS DICTATE MINIMUM TEMPERATURES.

UPDATE: RADAR COVERAGE FILLING IN AND STILL HAVE 6-8 HOURS TO GET
BACK EDGE PAST MOUNTAINS. WILL INCREASE POPS TONIGHT TO CATEGORICAL NC
AND LIKELY GA/SC.

AVL 67/91/64/91 +200
CLT 71/96/69/97 +100
GSP 72/97/70/98 6110

.GSP...NONE.

JAT

In the hours before

Special weather statement, Jul 24, 3:42 PM EDT, 1 hour 47 minutes before

GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014-
019-250400-

SEVERE THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
342 PM EDT SAT JUL 24 1999

...SEVERE THUNDERSTORMS POSSIBLE THROUGH THE EVENING HOURS...
STRONG THUNDERSTORMS HAVE DEVELOPED IN ADVANCE OF AN UPPER LEVEL
DISTURBANCE CROSSING THE AREA FROM THE NORTHWEST. SOME OF THESE
THUNDERSTORMS HAVE ALREADY PRODUCED LARGE HAIL...AND THE POTENTIAL
FOR DAMAGING WIND GUSTS ALSO EXISTS.

THUNDERSTORMS WILL BE MOST NUMEROUS ACROSS THE MOUNTAINS AND
FOOTHILLS DURING THE EARLY EVENING...WITH THE ACTIVITY GRADUALLY
SHIFTING EASTWARD AS THE EVENING PROGRESSES. THUNDERSTORMS WILL
GENERALLY TAPER OFF BY 9 PM ACROSS THE MOUNTAINS...WHILE
EASTERN PIEDMONT SECTIONS MAY SEE STORMS LINGER UNTIL MIDNIGHT.

THE WIDESPREAD NATURE OF THE THUNDERSTORMS...ALONG WITH THEIR SLOW
SOUTHEAST MOVEMENT...ALSO CREATES THE POTENTIAL FOR FLASH FLOODING
TO DEVELOP...ESPECIALLY IN THE MOUNTAINS. TORRENTIAL RAIN OF 1 TO 2
INCHES PER HOUR WILL BE COMMON IN THE STRONGEST THUNDERSTORMS...AND
STREAMS AND CREEKS WILL LIKELY RISE RAPIDLY.

SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL ARE REQUESTED TO
CLOSELY MONITOR THE SITUATION AND RELAY ANY REPORTS OF SEVERE
WEATHER OR FLASH FLOODING TO THE NATIONAL WEATHER SERVICE.

HG
HG

Special weather statement, Jul 24, 3:42 PM EDT, 1 hour 47 minutes before

GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014-
019-250400-

SEVERE THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
342 PM EDT SAT JUL 24 1999

...SEVERE THUNDERSTORMS POSSIBLE THROUGH THE EVENING HOURS...
STRONG THUNDERSTORMS HAVE DEVELOPED IN ADVANCE OF AN UPPER LEVEL
DISTURBANCE CROSSING THE AREA FROM THE NORTHWEST. SOME OF THESE
THUNDERSTORMS HAVE ALREADY PRODUCED LARGE HAIL...AND THE POTENTIAL
FOR DAMAGING WIND GUSTS ALSO EXISTS.

THUNDERSTORMS WILL BE MOST NUMEROUS ACROSS THE MOUNTAINS AND
FOOTHILLS DURING THE EARLY EVENING...WITH THE ACTIVITY GRADUALLY
SHIFTING EASTWARD AS THE EVENING PROGRESSES. THUNDERSTORMS WILL
GENERALLY TAPER OFF BY 9 PM ACROSS THE MOUNTAINS...WHILE
EASTERN PIEDMONT SECTIONS MAY SEE STORMS LINGER UNTIL MIDNIGHT.

THE WIDESPREAD NATURE OF THE THUNDERSTORMS...ALONG WITH THEIR SLOW
SOUTHEAST MOVEMENT...ALSO CREATES THE POTENTIAL FOR FLASH FLOODING
TO DEVELOP...ESPECIALLY IN THE MOUNTAINS. TORRENTIAL RAIN OF 1 TO 2
INCHES PER HOUR WILL BE COMMON IN THE STRONGEST THUNDERSTORMS...AND
STREAMS AND CREEKS WILL LIKELY RISE RAPIDLY.

SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL ARE REQUESTED TO
CLOSELY MONITOR THE SITUATION AND RELAY ANY REPORTS OF SEVERE
WEATHER OR FLASH FLOODING TO THE NATIONAL WEATHER SERVICE.

HG
HG

Local storm report, Jul 24, 4:30 PM EDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
430 PM EDT SAT JUL 24 1999

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

342 PM     SALISBURY                 NC   WIND DAMAGE
07/24/99   ROWAN                          EOC REPORT. TREE DOWN ON
                                          POWER LINE.

JAT

Local storm report, Jul 24, 4:30 PM EDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
430 PM EDT SAT JUL 24 1999

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

342 PM     SALISBURY                 NC   WIND DAMAGE
07/24/99   ROWAN                          EOC REPORT. TREE DOWN ON
                                          POWER LINE.

JAT

Local storm report, Jul 24, 4:34 PM EDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
434 PM EDT SAT JUL 24 1999

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

357 PM     2 S SALISBURY             NC   WIND DAMAGE
07/24/99   ROWAN                          EOC REPORT. TREE DOWN ON
                                          POWER LINE.

JAT

Local storm report, Jul 24, 4:34 PM EDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
434 PM EDT SAT JUL 24 1999

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

357 PM     2 S SALISBURY             NC   WIND DAMAGE
07/24/99   ROWAN                          EOC REPORT. TREE DOWN ON
                                          POWER LINE.

JAT

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 12:45 PM EDT	Severe Thunderstorm Warning	GSP	Yancey	50 min
Jul 24, 2:46 PM EDT	Severe Thunderstorm Warning	GSP	Iredell	44 min
Jul 24, 3:17 PM EDT	Severe Thunderstorm Warning	GSP	Davie, Rowan	48 min
Jul 24, 3:46 PM EDT	Flash Flood Warning	GSP	Haywood, Jackson	2 hr
Jul 24, 4:18 PM EDT	Severe Thunderstorm Warning	GSP	Madison	32 min
Jul 24, 4:22 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	48 min
Jul 24, 4:29 PM EDT	Severe Thunderstorm Warning	GSP	Yancey	51 min
Jul 24, 6:14 PM EDT	Flash Flood Warning	GSP	Mecklenburg	3 hr
Jul 24, 6:19 PM EDT	Severe Thunderstorm Warning	GSP	Union	46 min
Jul 24, 5:57 PM EDT	Severe Thunderstorm Warning	GSP	Abbeville	48 min
Jul 24, 6:21 PM EDT	Severe Thunderstorm Warning	GSP	Union	54 min
Jul 24, 6:45 PM EDT	Severe Thunderstorm Warning	GSP	Laurens	45 min
Jul 24, 5:35 PM EDT	Severe Thunderstorm Warning	GSP	Elbert	65 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.