Alert archive / North Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 274, NWS Greenville-Spartanburg, SC

September 4, 2002Iredell County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 4, 2002, 5:19 PM EDT for Iredell County, North Carolina. It was in force for 41 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: Sep 4, 2002, 5:19 PM EDT (21:19 UTC)
Expired: Sep 4, 2002, 6:00 PM EDT
In force: 41 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Iredell County, NC

The radar

The Roanoke radar (KFCX), 146 km from the middle of the area, began a volume at 21:21 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 93 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: 1009 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1341 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 71 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.

399 
WUUS52 KGSP 042119
SVRGSP
NCC097-042200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
519 PM EDT WED SEP 4 2002

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN IREDELL COUNTY IN THE PIEDMONT OF NORTH CAROLINA

* UNTIL 600 PM EDT

* AT 519 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM 6 MILES SOUTH OF STATESVILLE...OR ABOUT OVER
  TROUTMAN...MOVING SOUTH AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MOORESVILLE AT 540 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.

$$
07

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 Sep 4, 2:02 PM EDT, 3 hours 17 minutes earlier.

Area forecast discussion, Sep 4, 2:02 PM EDT, 3 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
202 PM EDT WED SEP 4 2002

COLD FRONT DROPPING TOWARD AREA NOW. CAPES EXPECTED TO BE QUITE HIGH
ALONG I-77...AND SEVERE WEATHER POSSIBLE. FROPA EXPECTED LATE
TONIGHT...SO WILL RUN CHANCE POPS THROUGH THIS EVENING. REST OF
FORECAST FEATURES DRY AIR OVER NC...WITH MARGINAL MOISTURE GA/SC. NO
MENTIONABLE POPS THU-SAT. AVN/ETA TEMPERATURES CONSIDERABLY HIGHER
THAN NGM. PREFER CONSERVATIVE APPROACH ON TEMPERATURES...SINCE AIR
MASS CHANGE NOT TOO DRAMATIC...AND FRONT DOES NOT SINK THAT FAR S.

SURFACE AND UPPER RIDGING ARE EXPECTED TO REMAIN FIRMLY IN CONTROL
WITH DRY WEATHER ACROSS THE REGION DURING THE MEDIUM RANGE
PERIOD...THUS WILL NOT STRAY FAR FROM MEX GUIDANCE.

FCSTID =    7
GSP   68  90  66  85 /  30  10  20  20
AND   69  92  67  86 /  30  10  20  20
CLT   67  89  65  84 /  40  10  10  10
HKY   65  88  61  83 /  30  10  10  10
AVL   62  86  58  81 /  30  10  10  10

.GSP...
GA...NONE.
NC...NONE.
SC...NONE.

O7

In the hours before

Local storm report, Sep 4, 4:11 PM EDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
411 PM EDT WED SEP 04 2002

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

408 PM     6 N STATESVILLE           NC   .75 INCH HAIL
09/04/02   IREDELL                        DIME HAIL. REPORT RELAYED
                                          FROM COUNTY EOC.

MOORE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 4:00 PM EDT	Severe Thunderstorm Warning	GSP	Iredell	60 min
Sep 4, 5:34 PM EDT	Severe Thunderstorm Warning	GSP	Caldwell	41 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2002 Every severe thunderstorm warning in 2002

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.