Alert archive / North Carolina / Mesoscale Discussions in 2003
Mesoscale Discussion 693
The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 7:17 PM EDT for Columbia County, Glascock County, Richmond County, Georgia; 27 counties in North Carolina; 23 counties in South Carolina. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- May 2, 2003, 7:17 PM EDT (23:17 UTC)
- Expired
- May 2, 2003, 8:45 PM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 53 counties
Columbia County, GA, Glascock County, GA, Richmond County, GA, Alamance County, NC, Anson County, NC, Cabarrus County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Davie County, NC, Durham County, NC, Forsyth County, NC, Franklin County, NC, Guilford County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, York County, SC
The radar
The Columbia radar (KCAE), 124 km from the middle of the area, began a volume at 23:20 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, 11.3 hours before the alert went out and 145 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
- 66 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1115 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852 ACUS11 KWNS 022317 SWOMCD SPC MCD 022317 NCZ000-SCZ000-GAZ000-030045- MESOSCALE DISCUSSION 0693 NWS STORM PREDICTION CENTER NORMAN OK 0617 PM CDT FRI MAY 02 2003 AREAS AFFECTED...CNTRL NC/CNTRL SC CONCERNING...SEVERE THUNDERSTORM WATCH 212... VALID 022317Z - 030045Z LARGE HAIL/DAMAGING WIND THREAT WILL CONTINUE ACROSS ERN PORTIONS OF WW0212. A NEW WW MAY BE REQUIRED WITHIN THE NEXT HOUR OR SO ACROSS THE ERN CAROLINAS. REGIONAL RADAR DATA SHOW A LINE OF STRONG TO SEVERE TSTMS FROM ROCKINGHAM COUNTY NC SWD INTO DARLINGTON COUNTY SC. THIS LINE OF STORMS HAS A HISTORY OF PRODUCING WIND DAMAGE AND MARGINALLY SEVERE HAIL ACROSS WRN/CNTRL NC SWD INTO NRN SC. TEMPERATURES HAVE WARMED INTO THE 80S AHEAD OF THESE STORMS...AND WHEN COMBINED WITH DEWPOINTS IN THE UPPER 50S TO MID 60S...IS CONTRIBUTING TO MLCAPES OF 1000-1500 J/KG. ALTHOUGH LOW-LEVEL WLY/SWLY LOW-LEVEL WINDS IS EFFECTIVELY DIMINISHING DEEP-LAYER SHEAR...THE PRESENCE OF AN ESTABLISHED COLD POOL AND RELATIVE HIGH TEMPERATURE/DEWPOINT SPREADS SUGGESTS A CONTINUED THREAT OF WIND DAMAGE ACROSS ERN PORTIONS OF WW0212...POTENTIALLY EWD INTO THE ERN CAROLINAS. THEREFORE...A NEW WW MAY BE REQUIRED FARTHER TO THE E IF CONVECTIVE LINE CAN REMAIN ORGANIZED. ..MEAD.. 05/02/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RAH...ILM...RNK...CHS...CAE...GSP...FFC... 34418181 34938143 35388110 35808074 35978058 36148050 36168050 36168043 36137957 36167899 36127858 36137821 36167805 36137789 36077791 35467837 34717896 33987951 33477990 33288006 33188012 33138016 33188072 33218164 33208247 33188270 33278262 33988211
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 2:23 PM EDT | Mesoscale Discussion | SPC | Rabun | 2 hr |
| May 2, 2:35 PM EDT | Severe Thunderstorm Watch | SPC | Banks, Franklin, Habersham, Hall, Hart, Rabun and 1 more | 5 hr |
| May 2, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | Bartow, Carroll, Catoosa, Chattooga, Cherokee, Clayton and 23 more | 5 hr |
| May 2, 4:25 PM EDT | Severe Thunderstorm Watch | SPC | Clay, Quitman, Troup | 4 hr |
| May 2, 4:40 PM EDT | Severe Thunderstorm Watch | SPC | Columbia, Glascock, McDuffie, Richmond | 5 hr |
| May 2, 5:43 PM EDT | Mesoscale Discussion | SPC | Baldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 36 more | 92 min |
| May 2, 5:57 PM EDT | Mesoscale Discussion | SPC | Clay | 93 min |
| May 2, 6:05 PM EDT | Tornado Watch | SPC | Heard | 5 hr |
| May 2, 6:25 PM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Barrow, Bartow, Bibb, Bleckley, Butts and 58 more | 6 hr |
| May 2, 6:36 PM EDT | Mesoscale Discussion | SPC | Bartow, Carroll, Catoosa, Chattooga, Cherokee, Clayton and 23 more | 84 min |
| May 2, 4:22 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Bladen, Cabarrus, Chatham, Cumberland and 23 more | 113 min |
| May 2, 7:45 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bladen, Brunswick, Columbus, Craven, Duplin and 11 more | 3 hr |
Nearby
Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in South Carolina, 2003Mesoscale Discussions in Georgia, 2003Every mesoscale discussion in 2003
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.