Alert archive / South Carolina / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 19, NWS Greenville-Spartanburg, SC

April 26, 2000Greenville County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 26, 2000, 6:41 PM EDT for Greenville County, South Carolina. It was in force for 49 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: Apr 26, 2000, 6:41 PM EDT (22:41 UTC)
Expired: Apr 26, 2000, 7:30 PM EDT
In force: 49 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Greenville County, SC

The radar

The Greer radar (KGSP), 14 km from the middle of the area, began a volume at 22:45 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.

What was reported inside it

Time	Report	Where	Remark
Apr 26, 7:18 PM EDT	Hail 0.75	Taylors, SC

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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.7 hours before the alert went out and 259 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

902 
WUUS52 KGSP 262242
SVRGSP
SCC045-262330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
641 PM EDT WED APR 26 2000

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GREENVILLE COUNTY IN UPSTATE SOUTH CAROLINA

* UNTIL 730 PM EDT

* AT 639 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM WITH LARGE HAIL 14 MILES NORTH OF GREENVILLE...MOVING
  SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREER AT 720 PM EDT

ALTHOUGH LARGE HAIL IS THE BIGGEST THREAT WITH THIS SEVERE
THUNDERSTORM...BRIEF DAMAGING WINDS COULD ALSO OCCUR.

$$

MCAVOY

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 Apr 26, 2:58 PM EDT, 3 hours 43 minutes earlier.

Area forecast discussion, Apr 26, 2:58 PM EDT, 3 hours 43 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
152 PM EDT WED APR 26 2000

CONVECTION FIRING RAPIDLY AT THIS HOUR NEAR CONVERGENCE AXIS
ASSOCIATED WITH INVERTED TROF THAT REMAINS ENTRENCHED ACROSS OUR
FOOTHILL COUNTIES. MSAS LIFTED INDICES BELOW ZERO FROM ELBERT
COUNTY GEORGIA NORTHEAST TO NEAR HICKORY...AS STEEPER LAPSE
RATES AND COLD POOL CONTINUE TO ENCROACH UPON CWFA. COVERAGE SHOULD
CONTINUE TO INCREASE AS ONE FINAL SHORTWAVE EJECTED FROM UPPER LOW
OVER THE NORTHEAST GRAZES OUR CWFA TONIGHT...WITH RATHER STRONG
DIFFERENTIAL POSITIVE VORTICITY ADVECTION ACROSS OUR EASTERN MOST
ZONES. PRECIPITATION SHOULD BE MORE SPOTTY IN THE MOUNTAINS...ON THE
WEST SIDE OF THE CONVERGENCE AXIS.

WILL INTRODUCE CHANCE POPS FOR ONE MORE PERIOD...HIGHEST EAST AND
SOUTH...AND MAY MENTION THUNDER DUE TO STEEP LAPSE RATES...ALTHOUGH
WE WILL BE LOSING OUR DAYTIME HEATING IN THE NEXT FEW HOURS. WE DID
GET ONE REPORT OF PEA-SIZED HAIL IN THE GEORGIA MOUNTAINS WITHIN THE
PAST HOUR IN JUST AN ORDINARY CONVECTIVE CELL...SO NOT OUT OF THE
QUESTION THAT SOME SIGNIFICANT HAIL SIZES COULD BE OBSERVED THIS
EVENING. BOTH ETA AND AVN PRECIP FIELDS SUGGEST MOST OF CWFA WILL
SEE MEASUREABLE RAINFALL BY MORNING. WILL ALSO ADDRESS PATCHY DENSE
FOG IN WEST AND SOUTHWEST ZONES...SINCE SOME OF THIS AREA MAY CLEAR
OVERNIGHT.

LOW LEVEL MOISTURE NOT AS WIDESPREAD TODAY AS IN PAST DAYS...AND THE
DRYING TREND WILL CONTINUE...ALBEIT BRIEFLY...THURSDAY. WILL
CONTINUE CURRENT FORECAST TREND OF A MORE OPTIMISTIC SKY FORECAST...
BUT MAY TONE DOWN MAX TEMPERATURES IN THE NORTHEAST CORNER FOR
THURSDAY...CLOSER TO ANY RESIDUAL NORTHERLY...AND COOLING...EFFECTS
ON THE BACKSIDE OF THE ENTIRE DEPARTING UPPER SYSTEM. NOT ENTIRELY
CONVINCED THAT ANY OVERNIGHT CONVECTION WILL BE OUT OF CWFA BY
DAYBREAK...SO MAY KEEP A CHANCE OF SHOWERS IN EAST EARLY IN DAY.

MODELS MUCH FASTER NOW WITH THE APPROACH OF THE NEXT SYSTEM...AND A
LITTLE FURTHER SOUTH. BEST LOW LEVEL CONVERGENCE...AND DPVA...ACROSS
SOUTHERN ZONES HAVE BEEN RE-CENTERED ACROSS UPSTATE/NORTHEAST GEORGIA
IN THE NEW 12Z RUNS..FOR THE LATE THURSDAY AND FRIDAY TIME FRAMES.
MOS POPS NOW COMING INTO LINE WITH FAN FOR CHANCE OF SHOWERS
WESTERN HALF OF CWFA THURSDAY NIGHT...AND ACROSS ALL CWFA FRIDAY.
WILL GO ALONG WITH GUIDANCE MAX TEMPS FOR THE MOST; HOWEVER...WILL
ADJUST MINS UPWARD A BIT BASED ON LOCAL TEMP SCHEME.

AFTER CLOSER LOOK AT GRIDDED DATA AND AFTER COORDINATION WITH
RNK...WILL POST A FROST WARNING FOR NORTHERN NC MOUNTAINS.
TEMPERATURES WILL BE CLOSE TO FREEZING...BUT FROST REPORTS MAY BE
MORE THAN JUST SCATTERED BY THURSDAY MORNING.

AVL 038/065 042/063 043 442-3
CLT 048/070 046/068 043 44632
GSP 046/072 046/070 045 44413

.GSP...FROST WARNING OVERNIGHT FOR THE NORTHERN MOUNTAINS OF NORTH
CAROLINA.

BURRUS

In the hours before

Local storm report, Apr 26, 2:50 PM EDT, 3 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
250 PM EDT WED APR 26 2000

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

105 PM     10 NW CLARKESVILLE        GA   .25 INCH HAIL
04/26/00   HABERSHAM                      911 CENTER RELAYED REPORT
                                          OF SHOWER PRODUCING PEA
                                          SIZE HAIL.

245 PM     2 N BELWOOD               NC   .25 INCH HAIL
04/26/00   CLEVELAND                      PUBLIC REPORT OF PEA SIZE
                                          HAIL

BWM
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 7:28 PM EDT	Severe Thunderstorm Warning	GSP	Greenville	47 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2000 Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.