Alert archive / North Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 17, NWS Greenville-Spartanburg, SC

April 17, 2002Polk County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 17, 2002, 2:47 PM EDT for Polk County, North Carolina. It was in force for 28 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: Apr 17, 2002, 2:47 PM EDT (18:47 UTC)
Expired: Apr 17, 2002, 3:15 PM EDT
In force: 28 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Polk County, NC

The radar

The Greer radar (KGSP), 44 km from the middle of the area, began a volume at 18:49 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, 6.8 hours before the alert went out and 224 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: 155 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 56 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.

000 
WUUS52 KGSP 171847
SVRGSP
NCC149-171915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
247 PM EDT WED APR 17 2002

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POLK COUNTY IN WESTERN NORTH CAROLINA

* UNTIL 315 PM EDT

* AT 247 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM WITH LARGE HAIL 7 MILES NORTHWEST OF COLUMBUS...OR
  ABOUT 4 MILES WEST OF LAKE ADGER...MOVING EAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAKE ADGER AT 300 PM EDT.
  MILL SPRING AT 305 PM EDT.

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

$$

RWH

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 17, 10:30 AM EDT, 4 hours 17 minutes earlier.

Area forecast discussion, Apr 17, 10:30 AM EDT, 4 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1030 AM EDT WED APR 17 2002

MODIFIED GSO SOUNDING SHOWS CAPE ON THE ORDER OF 2000 J/KG THIS
AFTERNOON. SURFACE BASED PARCELS SHOULD HAVE NO PROBLEM OVERCOMING A
MID LEVEL CAP THIS AFTERNOON...BUT SIMILAR TO YESTERDAY...MOST OF
THE AREA WILL NOT HAVE A DECENT TRIGGER UNTIL PERHAPS LATER IN THE
DAY. A WEAK VORT LOBE EXTENDING DOWN OVER THE NC FOOTHILLS THIS
MORNING WILL MOVE SLOWLY OFF TO THE EAST THIS AFTERNOON WHILE THE
MAIN SHORT WAVE OVER THE MS VALLEY REGION WILL NOT MAKE IT FAR ENUF
EAST BY THE END OF THE DAY. INSTEAD...I EXPECT SCATTERED SHOWERS TO
DEVELOP OVER THE MOUNTAINS IN THE AFTERNOON DUE TO DIFFERENTIAL
HEATING...AND THEN TO DRIFT OUT OVER THE FOOTHILLS AND PIEDMONT IN
THE LATE AFTERNOON AND EARLY EVENING. WILL ADJUST THE TIMING ON THE
WORDING TO ACCOUNT FOR THIS. THE UPSTATE AND NE GA HAVE THE LEAST
CHANCE CONSIDERING THE WESTERLY FLOW...SO THE POP WILL BE SCALED
BACK SOMEWHAT. TEMPS LOOK OK FOR THE MOST PART AND MIGHT GET A FEW
MINOR ADJUSTMENTS.

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

MOORE

In the hours before

Local storm report, Apr 17, 2:47 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
247 PM EDT WED APR 17 2002

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

233 PM     BRINDLETOWN               NC   1.75 INCH HAIL
04/17/01   BURKE                          REPORT FROM FIRE CHIEF
                                          RELAYED BY COUNTY EOC

HANDEL

Local storm report, Apr 17, 2:47 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
247 PM EDT WED APR 17 2002

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

233 PM     BRINDLETOWN               NC   1.75 INCH HAIL
04/17/02   BURKE                          REPORT FROM FIRE CHIEF
                                          RELAYED BY COUNTY EOC

HANDEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 1:05 PM EDT	Severe Thunderstorm Warning	GSP	Transylvania	25 min
Apr 17, 2:32 PM EDT	Severe Thunderstorm Warning	GSP	Burke	28 min
Apr 17, 4:01 PM EDT	Severe Thunderstorm Warning	GSP	Rutherford	29 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.