Alert archive / North Carolina / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 231, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 22, 2002, 3:26 PM EDT for Swain County, North Carolina. It was in force for 64 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 22, 2002, 3:26 PM EDT (19:26 UTC)
- Expired
- Jul 22, 2002, 4:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Whole counties
County Swain County, NC
The radar
The Knoxville radar (KMRX), 76 km from the middle of the area, began a volume at 19:29 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 |
|---|---|---|---|
| Jul 22, 3:35 PM EDT | Hail 0.75 | Cherokee, 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.4 hours before the alert went out and 253 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
- 725 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 658 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
596 WUUS52 KGSP 221926 SVRGSP NCC173-222030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 326 PM EDT MON JUL 22 2002 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SWAIN COUNTY IN WESTERN NORTH CAROLINA * UNTIL 430 PM EDT * AT 326 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES NORTHWEST OF SYLVA...OR ABOUT 3 MILES SOUTH OF CHEROKEE...MOVING WEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CHEROKEE AT 330 PM EDT. BRYSON CITY AT 355 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. $$ JONES/HANDEL
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 22, 2:18 PM EDT, 1 hour 8 minutes earlier.
Area forecast discussion, Jul 22, 2:18 PM EDT, 1 hour 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 218 PM EDT MON JUL 22 2002 COLD FRONT APPROACHING FROM NORTHWEST TUE NIGHT PROGGED TO HANG UP IN NC MTS FOR SEVERAL DAYS THEN FIZZLING BY SATURDAY. LOW LEVEL MOISTURE INCREASES TUE AND WED COINCIDING WITH APPROACHING FRONT...PERSISTING THRU SATURDAY. VORTICITY INCREASES TUE...THEN A STRONG VORT MAX OVER CWA BY WED EVE. MODELS IN GOOD AGREEMENT FOR SCATTERED SHWRS AND STORMS EVERY AFTN AND EVE THRU SAT. SILENT 20S FOR SUN AND MON WITH ONLY MARGINAL INSTABILITY AND MOISTURE. SLIGHT WARMING TREND THROUGH THE WEEK DUE TO DECREASING CLOUD COVER AS FRONT DISSIPATES. LOWER 90S MOST PIEDMONT AND FOOTHILL LOCATIONS BY END OF THE WEEK. FCSTID = GSP 71 90 72 87 / 40 50 50 50 AND 71 90 72 87 / 40 50 50 50 CLT 70 90 72 88 / 50 50 50 50 HKY 69 87 70 86 / 50 50 50 50 AVL 64 84 67 83 / 40 50 40 50 .GSP... GA...NONE. NC...NONE. SC...NONE. LAMB/DICARLO
In the hours before
Special weather statement, Jul 22, 11:10 AM EDT, 4 hours 16 minutes before
GAZ010-017-018-026-028-029-NCZ033>037-048>059-062>072-082-SCZ001>014- 019-222100- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 1110 AM EDT MON JUL 22 2002 ...SEVERE WEATHER POSSIBLE THIS AFTERNOON AND EVENING... WARM MOIST AIR OVER THE WESTERN CAROLINAS AND NORTHEAST GEORGIA WILL SUPPORT THE DEVELOPMENT OF SCATTERED THUNDERSTORMS THIS AFTERNOON. THESE THUNDERSTORMS WILL PERSIST INTO THE EVENING. CONDITIONS ARE FAVORABLE FOR A FEW OF THESE THUNDERSTORMS TO BECOME SEVERE... PRODUCING DAMAGING WIND. LARGE HAIL IS POSSIBLE...BUT TO A LESSER EXTENT. THE GREATEST CHANCE OF SEVERE WEATHER WILL BE IN NORTHEAST GEORGIA AND UPSTATE SOUTH CAROLINA. STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE MEDIA OUTLET FOR THE LATEST UPDATES CONCERNING THIS POTENTIAL SEVERE WEATHER SITUATION. RWH
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 4:44 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus | 46 min |
| Jul 22, 5:14 PM EDT | Severe Thunderstorm Warning | GSP | Union | 46 min |
| Jul 22, 7:46 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Rutherford | 44 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2002Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.