Alert archive / North Carolina / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 251, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 22, 2002, 5:11 PM EDT for Iredell County, North Carolina. It was in force for 49 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
- Aug 22, 2002, 5:11 PM EDT (21:11 UTC)
- Expired
- Aug 22, 2002, 6:00 PM EDT
- In force
- 49 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 21:13 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, 9.2 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.
- Mixed-layer CAPE
- 996 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
866 WUUS52 KGSP 222111 SVRGSP NCC097-222200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 509 PM EDT THU AUG 22 2002 THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN IREDELL COUNTY IN THE PIEDMONT OF NORTH CAROLINA * UNTIL 600 PM EDT * AT 509 PM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM WITH DAMAGING WINDS 9 MILES SOUTHWEST OF YADKINVILLE...OR ABOUT 5 MILES NORTH OF HARMONY...MOVING SOUTH AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... UNION GROVE AT 515 PM EDT. HARMONY AT 530 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. $$ MCAVOY/NED
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 Aug 22, 2:53 PM EDT, 2 hours 18 minutes earlier.
Area forecast discussion, Aug 22, 2:53 PM EDT, 2 hours 18 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 253 PM EDT THU AUG 22 2002 DESPITE STG UPPER RIDGING AND VERY WARM TEMPS ALOFT...HIGH LLVL DWPTS & WEAK SLY FLOW RESULTING IN ENOUGH INSTABILITY TO GENERATE ISOLATED DEEP CONVECTION OVER THE NC MTNS & EVEN SOME SMALL SHOWERS ACRS THE WRN UPSTATE/NE GA. AT THIS POINT...PLAN ON CONFINING ISOLATED EVENING POP WORDING TO JUST NC MTNS AS ACTIVITY EAST OF THE NC MTNS MAY BE TOO FEW AND FAR BETWEEN FOR A MENTION. ON FRIDAY...UPPER RIDING GETS DISPLACED BUT WE WILL BE MAINTAINING A WESTERLY LLVL FLOW AS WELL...LIKELY LIMITING DEEP CONVECTION EAST OF THE MTNS...BUT SUPPORTING CHCS FOR SCATTERED ACTIVITY IN THE HIGHER TERRAIN. ETA LLVL THICKNESS VALUES DO CREEP UP SOME AS WELL BUT PREFER MAV/FWC FCSTS OF MID 90S ACRS MY PIEDMONT/FTHL ZONES. SFC DWPTS THIS AFTERNOON STILL IN THE LOWER 70S & ALTHOUGH WILL HAVE A BETTER CHC OF MIXING INTO U 60S ON FRIDAY...MAY SEE HEAT INDEX VALUES IN LOWER 100S. STRONGER WESTERLIES CONTINUE MOVING SWD ON SATURDAY MAINTAINING A WESTERLY FLOW THRU A FAIRLY DEEP LAYER. COMBINATION OF APPROACHING COLD FRONT & STRENGTHENING PRE-FRONTAL TROUGH WARRANTS A CONTINUATION OF GOING CHC POPS CWFA WIDE. LLVL FLOW PROGGED TO VEER TO NORTHERLY SAT NIGHT AS MAIN SYNOPTIC SCALE SFC BNDRY LINGERS NEAR COASTAL PLAIN INTO SUNDAY. HEADING INTO THE DAY 4-7 PERIOD...CONFIDENCE NOT HIGH WRT TO TIMING AND STRENGTH OF SYNOPTIC SCALE FEATURES AFFECTING CWFA ESPECIALLY WHEN LOOKING AT CHANGES PROGGED BY 12Z AVN IN COMPARISON TO ITS EARLIER RUN. BUT ANYWAY...THIS MORNINGS ENSEMBLE MEANS ARE IN GOOD ENOUGH AGREEMENT ADVERTISING A BROAD CENTRAL/ERN US TROUGH & ROTATING PERIODIC S/WVS EASTWARD THRU THURSDAY... RESULTING IN MAINLY CLIMO CHANCES FOR DAILY TSTM ACTIVITY. FCSTID = 55 GSP 71 95 72 91 / 10 20 20 30 AND 72 97 72 91 / 10 20 20 30 CLT 70 96 72 91 / 10 20 20 30 HKY 69 93 71 90 / 10 20 20 30 AVL 67 88 67 86 / 20 30 30 40 .GSP... GA...NONE. NC...NONE. SC...NONE.
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.